[Q] Socket code throws NullPointerException in OnsensorChanged

[Q] Socket code throws NullPointerException in OnsensorChanged - Java for Android App Development

Hi frends im working on my android final year project based on sockets..im using ssynctask to connect socket etc..Everything works fine, since I'm using AsyncTask to create a Socket connection ... the socket works fine in the doInBackground() method, but when I try to send Sensor data from theonSensorChanged() method, I get null pointer exception. I don't know what went wrong. in short Socket returns NULL outside asyncTask Class...can some 1 help me ?..
here is my code
Code:
package com.example.sensorsmart;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements SensorEventListener{
private static final int SERVERPORT = 8222;
private static final String SERVER_IP = "192.168.0.101";
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private TextView tv ;
public ServerSocket serverSocket=null;
public Socket socket = null;
public BufferedReader in ;
public BufferedWriter out;
public PrintWriter pw ;
public FileWriter writer=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new MyTask().execute();
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mAccelerometer mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mAccelerometer,SensorManager.SENSOR_DELAY_NORMAL);
}
public void onStopClick(View view) {
mSensorManager.unregisterListener(this);}
private class MyTask extends AsyncTask<Void, Void, Void>
{
@Override
protected Void doInBackground(Void... arg0) {
try {
serverSocket = new ServerSocket(8222);
} catch (IOException e) {
e.printStackTrace();
}
try {
socket=serverSocket.accept();
Log.i("TcpServer", "CONNECTED");
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
if(!in.ready())
{
Log.i("TcpServer", "READER IS NOT READY");
}
final String g;
final String c;
String b = null;
Log.i("TcpServer", "GOING");
g=in.readLine();
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
e.printStackTrace();
String response = e.getCause().toString();
Log.i("TCP",response);
}
return null;
}
}
@Override
public void onSensorChanged(SensorEvent event) {
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
pw.write("g"); //NULL POINT EXCEPTION THROWS HERE
}
}
LOGCAT:
Code:
02-06 11:31:54.250: E/AndroidRuntime(4108): FATAL EXCEPTION: main
02-06 11:31:54.250: E/AndroidRuntime(4108): java.lang.NullPointerException
02-06 11:31:54.250: E/AndroidRuntime(4108): at com.example.sensorsmart.MainActivity.onSensorChanged(MainActivity.java:196)
02-06 11:31:54.250: E/AndroidRuntime(4108): at android.hardware.SystemSensorManager$ListenerDelegate$1.handleMessage(SystemSensorManager.java:204)
02-06 11:31:54.250: E/AndroidRuntime(4108): at android.os.Handler.dispatchMessage(Handler.java:99)
02-06 11:31:54.250: E/AndroidRuntime(4108): at android.os.Looper.loop(Looper.java:137)
02-06 11:31:54.250: E/AndroidRuntime(4108): at android.app.ActivityThread.main(ActivityThread.java:4759)
02-06 11:31:54.250: E/AndroidRuntime(4108): at java.lang.reflect.Method.invokeNative(Native Method)
02-06 11:31:54.250: E/AndroidRuntime(4108): at java.lang.reflect.Method.invoke(Method.java:511)
02-06 11:31:54.250: E/AndroidRuntime(4108): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
02-06 11:31:54.250: E/AndroidRuntime(4108): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
02-06 11:31:54.250: E/AndroidRuntime(4108): at dalvik.system.NativeStart.main(Native Method)

you have to set the variable in onpostexecute() and also use
Code:
new MyTask().execute().get()
so you make sure the async task has finished for sure

Can u gv example ?
warlock9_0 said:
you have to set the variable in onpostexecute() and also use
Code:
new mytask().execute().get()
so you make sure the async task has finished for sure
Click to expand...
Click to collapse
frend can u give me an example ?

forget the execute().get() for now, maybe it is not needed
read the documents for asynctask and change your result type from void, to whatever you want to set
for example if you want only the PrintWriter to be set you can do this
Code:
package com.example.sensorsmart;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements SensorEventListener{
private static final int SERVERPORT = 8222;
private static final String SERVER_IP = "192.168.0.101";
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private TextView tv ;
public ServerSocket serverSocket=null;
public Socket socket = null;
public BufferedReader in ;
public BufferedWriter out;
public PrintWriter pw ;
public FileWriter writer=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new MyTask().execute();
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mAccelerometer mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mAccelerometer,SensorManager.SENSOR_DELAY_NORMAL);
}
public void onStopClick(View view) {
mSensorManager.unregisterListener(this);}
private class MyTask extends AsyncTask<Void, Void, PrintWriter>
{
@Override
protected PrintWriter doInBackground(Void... arg0) {
try {
serverSocket = new ServerSocket(8222);
} catch (IOException e) {
e.printStackTrace();
}
try {
socket=serverSocket.accept();
Log.i("TcpServer", "CONNECTED");
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
if(!in.ready())
{
Log.i("TcpServer", "READER IS NOT READY");
}
final String g;
final String c;
String b = null;
Log.i("TcpServer", "GOING");
g=in.readLine();
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
e.printStackTrace();
String response = e.getCause().toString();
Log.i("TCP",response);
}
return pw;
}
protected void onPostExecute(PrintWriter result) {
pw = result;
}
}
@Override
public void onSensorChanged(SensorEvent event) {
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
if(pw!=null) pw.write("g"); //NULL POINT EXCEPTION THROWS HERE
}
}
if you want other variables to be returned too, you can make a custom object as the type of the result

is it possible to pass socket instead mof printwriter?
hi friend thank u for ur reply...is it possible to pass socket in onpostexecute () ?
i tried with below code still socket is null in ONsensor Changed
Code:
private class MyTask extends AsyncTask<Void, Void,Socket>
{
@Override
protected Socket doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
serverSocket = new ServerSocket(8222);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
socket=serverSocket.accept();
Log.i("TcpServer", "CONNECTED");
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
//out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
if(!in.ready())
{
Log.i("TcpServer", "READER IS NOT READY");
}
final String g;
final String c;
String b = null;
Log.i("TcpServer", "GOING");
g=in.readLine();
//Log.i("TcpServer", in.readLine());
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
Log.i("TcpServer", "RECEIVED");
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
String response = e.getCause().toString();
Log.i("TCP",response);
}
return socket;
}
protected void onPostExecute(Socket result) {
socket = result;
}

yes, you can pass the socket like you do
but in the onsensorchanged function you are using the printwriter (pw) you created in the doinbackground function which is null because you haven't passed it to the main thread
so, you either have to make a new object that will pass all the things to the main threat (socket, printwriter, bufferedreader) if you want them all, or pass the printwriter only, or you will initialize them on the post execute function
for example, you can return the socket and then do
Code:
protected void onPostExecute(Socket result) {
socket = result;
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
}

still null
here is my entire code..i have done exactly what u said...still socket null in OnsensorChanged()
Code:
package com.example.sensorsmart;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements SensorEventListener{
private static final int SERVERPORT = 8222;
private static final String SERVER_IP = "192.168.0.101";
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private TextView tv ;
public ServerSocket serverSocket=null;
public Socket socket = null;
public BufferedReader in ;
public BufferedWriter out;
public PrintWriter pw ;
public FileWriter writer=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new MyTask().execute();
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
public void onStopClick(View view) {
mSensorManager.unregisterListener(this);
}
protected void onResume() {
super.onResume();
}
protected void onStop(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSensorManager.unregisterListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private class MyTask extends AsyncTask<Void, Void,Socket>
{
@Override
protected Socket doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
serverSocket = new ServerSocket(8222);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
socket=serverSocket.accept();
Log.i("TcpServer", "CONNECTED");
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
//out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
if(!in.ready())
{
Log.i("TcpServer", "READER IS NOT READY");
}
final String g;
final String c;
String b = null;
Log.i("TcpServer", "GOING");
g=in.readLine();
//Log.i("TcpServer", in.readLine());
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
Log.i("TcpServer", "RECEIVED");
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
String response = e.getCause().toString();
Log.i("TCP",response);
}
return socket;
}
protected void onPostExecute(Socket result) {
socket = result;
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
}
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
pw.println("egaga");
}
public void CloseConn() throws IOException //not used
{
pw.flush();
in.close();
socket.close();
serverSocket.close();
}
}

Code:
public class MainActivity extends Activity implements SensorEventListener{
private static final int SERVERPORT = 8222;
private static final String SERVER_IP = "192.168.0.101";
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private TextView tv ;
public ServerSocket serverSocket=null;
public Socket socket = null;
public BufferedReader in ;
public BufferedWriter out;
public PrintWriter pw ;
public FileWriter writer=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new MyTask().execute();
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
public void onStopClick(View view) {
mSensorManager.unregisterListener(this);
}
protected void onResume() {
super.onResume();
}
protected void onStop(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSensorManager.unregisterListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private class MyTask extends AsyncTask<Void, Void,AllInOne>
{
@Override
protected AllInOne doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
serverSocket = new ServerSocket(8222);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
socket=serverSocket.accept();
Log.i("TcpServer", "CONNECTED");
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
pw = new PrintWriter(socket.getOutputStream(),true);
//out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
if(!in.ready())
{
Log.i("TcpServer", "READER IS NOT READY");
}
final String g;
final String c;
String b = null;
Log.i("TcpServer", "GOING");
g=in.readLine();
//Log.i("TcpServer", in.readLine());
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
Log.i("TcpServer", "RECEIVED");
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),g, Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
String response = e.getCause().toString();
Log.i("TCP",response);
}
return new AllInOne(socket,in,pw);
}
protected void onPostExecute(AllInOne result) {
socket = result.so;
in = result.re;
pw = result.pr;
}
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
if(pw!=null) pw.println("egaga");
else Log.e("PrintWriter", null);
}
public void CloseConn() throws IOException //not used
{
pw.flush();
in.close();
socket.close();
serverSocket.close();
}
private class AllInOne {
public Socket so;
public BufferedReader re;
public PrintWriter pr;
public AllInOne(Socket s, BufferedReader r, PrintWriter p ){
this.so = s;
this.re = r;
this.pr = p;
}
}
}
try this
since you are initializing in and pw inside the doinbackground, you have to pass them to the main thread
so i added another class to hold all these and i pass them on result
finally you also have to check in the onsensorchanged if the pw is null because the asynctask may have not finished yet when this is called

null
async task not completed because of socket not closed?

Thank u
bro..some how i managed to get it work..thanks a lot for ur time..and nice to meet u..

Related

Help with ViewPager and Fragments

Hi all!
I've been developing an app that uses various things from my college and centralizes them in one app. I've made the app with two tabs - one for current students and one for prospective students. I would like to add the functionality of swiping between the two activities, and I saw that to do that, I want to convert my currentStudents and prospectiveStudents activities into fragments.
I have a couple of questions.
First, I don't quite understand how to accomplish converting the activities into fragments.
Second, I don't quite understand how to implement the viewPager effect.
If anyone can assist me in doing this, that'd be great. I've read through a lot of guides, but those guides are written to reflect other apps and it's pretty confusing.
Here is my MainActivity:
Code:
package com.andrew.obu;
import android.app.TabActivity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;
public class MainActivity extends TabActivity {
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TabHost tabHost = getTabHost();
TabSpec cstudents = tabHost.newTabSpec("Current Students");
cstudents.setIndicator("Students");
Intent cstudentsIntent = new Intent(this, CurrentStudents.class);
cstudents.setContent(cstudentsIntent);
TabSpec prospects = tabHost.newTabSpec("Prospectives");
prospects.setIndicator("Prospectives");
Intent prospectsIntent = new Intent(this, ProspectiveStudents.class);
prospects.setContent(prospectsIntent);
tabHost.addTab(cstudents);
tabHost.addTab(prospects);
tabHost.getTabWidget().getChildAt(0).setBackgroundColor(Color.BLACK);
tabHost.getTabWidget().getChildAt(1).setBackgroundColor(Color.BLACK);
tabHost.setOnTabChangedListener(new OnTabChangeListener() {
@Override
public void onTabChanged(String arg0) {
TabHost tabHost = getTabHost();
setTabColor(tabHost);
}
});
setTabColor(tabHost);
}
public void setTabColor(TabHost tabhost) {
for(int i=0;i<tabhost.getTabWidget().getChildCount();i++)
tabhost.getTabWidget().getChildAt(i).setBackgroundColor(Color.BLACK); //unselected
if(tabhost.getCurrentTab()==0)
tabhost.getTabWidget().getChildAt(tabhost.getCurrentTab()).setBackgroundColor(Color.rgb(34, 34, 34)); //1st tab selected
else
tabhost.getTabWidget().getChildAt(tabhost.getCurrentTab()).setBackgroundColor(Color.rgb(34, 34, 34)); //2nd tab selected
}
}
And my code for the CurrentStudents Activity
Code:
package com.andrew.obu;
import android.os.Bundle;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
public class CurrentStudents extends ListActivity {
private static final int MENU_ABOUT = 0;
private static final int MENU_CONTACT = 1;
int counter;
Button banner, email, moodle, jupiter, staff, calendar, athletics, news, prosp;
TextView display;
Drawable drawable;
@Override
public boolean onCreateOptionsMenu(android.view.Menu menu)
{
menu.add(0, MENU_ABOUT, 0, "About");
menu.add(0, MENU_CONTACT, 0, "Contact Me");
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()) {
case MENU_ABOUT:
doSomething();
return true;
case MENU_CONTACT:
doSomethingElse();
return true;
}
return super.onOptionsItemSelected(item);
}
private void doSomethingElse() {
Intent intent = new Intent(getBaseContext(), Contact.class);
startActivity(intent);
}
private void doSomething() {
Intent intent = new Intent(getBaseContext(), About.class);
startActivity(intent);}
/*@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cstudents);*/
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] choose = getResources().getStringArray(R.array.cstudents_array);
ListView lv = getListView();
LayoutInflater lf;
View headerView;
lf = this.getLayoutInflater();
headerView = (View)lf.inflate(R.layout.cstudents, null, false);
lv.addHeaderView(headerView, null, false);
lv.setTextFilterEnabled(true);
lv.setBackgroundColor(Color.WHITE);
setListAdapter(new ArrayAdapter<String>(this, R.layout.list_content, choose));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Intent intent;
switch(position) {
default:
case 0 :
intent = new Intent(this, Bannerdisclaimer.class);
break;
case 2 :
intent = new Intent(this, Emailwebview.class);
break;
case 3 :
intent = new Intent(this, Moodlewebview.class);
break;
case 4 :
intent = new Intent(this, Jupiterwebview.class);
break;
case 5 :
intent = new Intent(this, Staffwebview.class);
break;
case 6 :
intent = new Intent(this, Calendar.class);
break;
case 7 :
intent = new Intent(this, Athleticswebview.class);
break;
case 8 :
intent = new Intent(this, Newswebview.class);
//intent7.putExtra("KEY_SELECTED_INDEX", position);
//startActivity(intent7);
break;
}
startActivity(intent);
};
}
//Resources res = getResources();
//drawable = res.getDrawable(R.drawable.bannera);
/*final Context context1 = this;
banner = (Button) findViewById(R.id.BannerButton);
banner.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
banner.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myWebView = new Intent(context1, Bannerwebview.class);
startActivity(myWebView);
}
});
final Context context2 = this;
email = (Button) findViewById(R.id.EmailButton);
email.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
email.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myWebView = new Intent(context2, Emailwebview.class);
startActivity(myWebView);
}
});
final Context context3 = this;
moodle = (Button) findViewById(R.id.MoodleButton);
moodle.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
moodle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myWebView = new Intent(context3, Moodlewebview.class);
startActivity(myWebView);
}
});
final Context context4 = this;
jupiter = (Button) findViewById(R.id.JupiterButton);
jupiter.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
jupiter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myWebView = new Intent(context4, Jupiterwebview.class);
startActivity(myWebView);
}
});
final Context context5 = this;
staff = (Button) findViewById(R.id.StaffButton);
staff.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
staff.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myWebView = new Intent(context5, Staffwebview.class);
startActivity(myWebView);
}
});
final Context context = this;
calendar = (Button) findViewById(R.id.CalendarButton);
calendar.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
calendar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(context, Calendar.class);
startActivity(intent);
}
});
final Context context6 = this;
athletics = (Button) findViewById(R.id.AthleticsButton);
athletics.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
athletics.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(context6, Athleticswebview.class);
startActivity(intent);
}
});
final Context context7 = this;
news = (Button) findViewById(R.id.NewsButton);
news.getBackground().setColorFilter(Color.rgb(148, 148, 148), PorterDuff.Mode.MULTIPLY);
news.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(context7, Newswebview.class);
startActivity(intent);
}
});*/
And my code for the ProspectiveStudents activity
Code:
package com.andrew.obu;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
public class ProspectiveStudents extends ListActivity
{
private static final int MENU_ABOUT = 0;
private static final int MENU_CONTACT = 1;
int counter;
Button banner, email, moodle, jupiter, staff, calendar, athletics, news, prosp;
TextView display;
Drawable drawable;
@Override
public boolean onCreateOptionsMenu(android.view.Menu menu)
{
menu.add(0, MENU_ABOUT, 0, "About");
menu.add(0, MENU_CONTACT, 0, "Contact Me");
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()) {
case MENU_ABOUT:
doSomething();
return true;
case MENU_CONTACT:
doSomethingElse();
return true;
}
return super.onOptionsItemSelected(item);
}
private void doSomethingElse() {
Intent intent = new Intent(getBaseContext(), Contact.class);
startActivity(intent);
}
private void doSomething() {
Intent intent = new Intent(getBaseContext(), About.class);
startActivity(intent);}
/*@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cstudents);*/
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] choose = getResources().getStringArray(R.array.pstudents_array);
ListView lv = getListView();
LayoutInflater lf;
View headerView;
lf = this.getLayoutInflater();
headerView = (View)lf.inflate(R.layout.cstudents, null, false);
lv.addHeaderView(headerView, null, false);
lv.setTextFilterEnabled(true);
lv.setBackgroundColor(Color.WHITE);
setListAdapter(new ArrayAdapter<String>(this, R.layout.list_content, choose));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Intent intent;
switch(position) {
default:
case 0 :
intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.okbu.edu/admissions/onlineapp.html"));
break;
case 2 :
intent = new Intent(this, Majors.class);
break;
case 3 :
intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.okbu.edu/admissions/moreinfo.html"));
break;
case 4 :
intent = new Intent(this, Visitwebview.class);
break;
/*case 5 :
intent = new Intent(this, Getinvolved.class);
break;*/
}
startActivity(intent);
};
}

I recommend you to use ActionBarSherlock library: http://actionbarsherlock.com
Take a look at the samples and it will be easy to do what you ask for. At first, it may take a while to learn how to use this library, but you will not regret it since you will use it several times in the future for sure.
The coolest thing about this library is that it is compatible with older Android versions. I.e. The swipe effect will be available for Ice Cream users while for Froyo users will see two clickable tabs :good:

First of all, you can't swipe between activities. You can only swipe between fragments. Think of the activity as a container which holds your two fragments.
This is an example of a ListFragment:
Code:
public static class TitlesFragment extends ListFragment {
boolean mDualPane;
int mCurCheckPosition = 0;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Populate list with our static array of titles.
setListAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_activated_1, Shakespeare.TITLES));
// Check to see if we have a frame in which to embed the details
// fragment directly in the containing UI.
View detailsFrame = getActivity().findViewById(R.id.details);
mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null) {
// Restore last state for checked position.
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
if (mDualPane) {
// In dual-pane mode, the list view highlights the selected item.
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
// Make sure our UI is in the correct state.
showDetails(mCurCheckPosition);
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
/**
* Helper function to show the details of a selected item, either by
* displaying a fragment in-place in the current UI, or starting a
* whole new activity in which it is displayed.
*/
void showDetails(int index) {
mCurCheckPosition = index;
if (mDualPane) {
// We can display everything in-place with fragments, so update
// the list to highlight the selected item and show the data.
getListView().setItemChecked(index, true);
// Check what fragment is currently shown, replace if needed.
DetailsFragment details = (DetailsFragment)
getFragmentManager().findFragmentById(R.id.details);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = DetailsFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getFragmentManager().beginTransaction();
if (index == 0) {
ft.replace(R.id.details, details);
} else {
ft.replace(R.id.a_item, details);
}
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
// Otherwise we need to launch a new activity to display
// the dialog fragment with selected text.
Intent intent = new Intent();
intent.setClass(getActivity(), DetailsActivity.class);
intent.putExtra("index", index);
startActivity(intent);
}
}
}
I can't help you there because I've never worked with lists.
As for the swiping effect, build your project with a minimum SDK of 14 (ICS) and choose swipe-able tabs navigation. The ADT will do the job for you. Later, in order to maintain compatibility, use ABS library as patedit suggested.
Good luck

To implement a ViewPager, just add ViewPager to XML layout, and set a FragmentPageAdapter to it.
You must use support package from Android SDK and FragmentActivity instead of Activitiy.
You can examine source code of API Demos package to know more.

Pass Connection Between Intents

I am building an android application to do various queries on my MySQL database. Once a successful login has returned on the main activity, I create a new Intent that holds search and query options. Here's the issue I am having. I keep getting a null pointer exception on stmt = con.createStatement(); Below is my logcat:
Code:
08-20 16:12:07.359 654-810/com.android.exchange D/ExchangeService: !!! deviceId unknown; stopping self and retrying
08-20 16:12:08.469 36-653/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
08-20 16:12:11.559 1926-1949/com.example.testapplication W/System.err: java.lang.NullPointerException
08-20 16:12:11.559 1926-1949/com.example.testapplication W/System.err: at com.example.testapplication.Networking.Search(Networking.java:44)
08-20 16:12:11.559 1926-1949/com.example.testapplication W/System.err: at com.example.testapplication.ControlActivity$1.run(ControlActivity.java:53)
08-20 16:12:11.559 1926-1949/com.example.testapplication W/System.err: at java.lang.Thread.run(Thread.java:856)
08-20 16:12:12.369 654-654/com.android.exchange D/ExchangeService: !!! EAS ExchangeService, onStartCommand, startingUp = false, running = false
08-20 16:12:12.369 278-498/system_process W/ActivityManager: Unable to start service Intent { act=com.android.email.ACCOUNT_INTENT } U=0: not found
08-20 16:12:12.369 654-815/com.android.exchange D/ExchangeService: !!! Email application not found; stopping self
08-20 16:12:12.379 278-278/system_process W/ActivityManager: Unable to start service Intent { act=com.android.email.ACCOUNT_INTENT } U=0: not found
I'm curious whether it is better practice to close the connection and reopen it in the new intent? Or pass the connection between intents somehow?
Any input would be greatly appreciated!

wait...
Here are snippets of my code to help debug.
Code:
[user=439709]@override[/user]
public void onClick(View view) {
if(view.getId() == R.id.LoginButton) {
Toast.makeText(getApplicationContext(), "Attempting Connection", Toast.LENGTH_SHORT).show();
//Spawn new thread
new Thread(new Runnable() {
public void run() {
if(net.execLogin(mUserInput.getText().toString(), mPassInput.getText().toString())) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "Connected to Database", Toast.LENGTH_LONG).show();
}
});
//start new activity
Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
[user=439709]@override[/user]
public void run() {
Intent intent = new Intent(LoginActivity.this, ControlActivity.class);
startActivity(intent);
}
});
}
else {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "Connection Failed :(", Toast.LENGTH_LONG).show();
}
});
}
}
}).start();
}
}
And here is the new activity started by the above code:
Code:
package com.example.testapplication;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class ControlActivity extends Activity implements View.OnClickListener {
private ArrayList<Hardware> list = new ArrayList<Hardware>();
EditText mEditText;
ListView mListView;
[user=439709]@override[/user]
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_control);
setupPage();
}
public void setupPage() {
Button search = (Button)findViewById(R.id.search);
search.setOnClickListener(this);
mEditText = (EditText)findViewById(R.id.editText);
mListView = (ListView)findViewById(R.id.listView);
}
[user=439709]@override[/user]
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.control, menu);
return true;
}
public void onClick(View view) {
if(view.getId() == R.id.search) {
new Thread(new Runnable() {
public void run() {
list = new Networking().Search("Type", mEditText.getText().toString());
}
}).start();
ArrayAdapter<Hardware> adapter = new ArrayAdapter<Hardware>(this, android.R.layout.simple_list_item_1, list);
adapter.notifyDataSetChanged();
mListView.setAdapter(adapter);
if(list == null) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "0 Results Yielded :(", Toast.LENGTH_SHORT).show();
}
});
}
}
}
}
And here is the code I use to connect and query the database
Code:
import java.sql.*;
import java.util.*;
public class Networking implements DbQuery {
private static final String DRIVER = "org.mariadb.jdbc.Driver";
private static final String URL = "jdbc:mysql://146.187.16.32/Peirce";
ArrayList<Hardware> ara = new ArrayList<Hardware>();
Database db = new Database();
Hardware h1;
Connection con = null;
Statement stmt = null;
public boolean execLogin(String uName, String pWord) {
try {
Class.forName(DRIVER);
con = DriverManager.getConnection(URL, uName, pWord);
if(!con.isClosed()){
return true;
}
return false;
}catch(SQLException e) {
e.printStackTrace();
}catch(ClassNotFoundException e) {
e.printStackTrace();
}
return false;
}
public ArrayList<Hardware> Search(String arg, String target) {
try {
stmt = con.createStatement(); //throws null pointer exception
ResultSet rs = stmt.executeQuery("Select * from " + db.getTable() + " where " + arg + "='" + target + "';");
while(rs.next()) {
ara.add(new Hardware(rs.getString("Type"), rs.getString("Make"), rs.getString("Model"), rs.getString("Serial"), rs.getString("Comments")));
}
return ara;
}catch(SQLException e) {
e.printStackTrace();
}catch(NullPointerException e) {
e.printStackTrace();
}
return ara;
}

nevermind
i have figured it out.

How to make the buttons in a fragment manipulate integer variables in seperate activi

This is a rudimentary android application that serves as an umpires strike/ball/out counter. There is a settings icon in the action bar of the MainActivity. When this icon is 'clicked on', a new Activity is started consisting of a PreferenceFragment, which consists of a checkboxpreference, and a Fragment that consists of 3 buttons. These buttons reset the stike_count, ball_count and total_outs_count to zero. I have spent a day on this and am having trouble figuring out how to manipulate integer variables in my MainActivity from button clicks in a seperate Activity's Fragment. Please point me in the right direction.
package edu.umkc.baldwin;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceFragment;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private static final String TAG = "UmpireActivity";
// Constant variables declared/initialized to keep track of values
// across lifecycle states
@SuppressWarnings("unused")
private static final String STRIKES = "0";
@SuppressWarnings("unused")
private static final String BALLS = "0";
@SuppressWarnings("unused")
private static final String OUTS = "0";
TextView strikeCounterTV;
TextView ballCounterTV;
TextView totalOutCounterTV;
private Button strikeCounterButton;
private Button ballCounterButton;
private int strike_count;
private int ball_count;
private int out_count;
private void updateViews(){
strikeCounterTV.setText(String.valueOf(strike_count));
ballCounterTV.setText(String.valueOf(ball_count));
totalOutCounterTV.setText(String.valueOf(out_count));
}
private void displayToast(boolean x){
int messageId = 0;
if (x == true){
messageId = R.string.strike_toast_view;
} else {
messageId = R.string.ball_toast_view;
}
Toast toast = Toast.makeText(MainActivity.this, messageId,
Toast.LENGTH_SHORT);
LinearLayout toastLayout = (LinearLayout) toast.getView();
TextView toastTV = (TextView) toastLayout.getChildAt(0);
toast.setGravity(Gravity.CENTER|Gravity.CENTER, 0, -150);
toastTV.setTextSize(42);
toast.show();
}
/*
* (non-Javadoc)
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "OnCreate(Bundle) called");
setContentView(R.layout.main_page_layout);
//Declare TextView objects and Button objects
strikeCounterTV = (TextView) findViewById(R.id.strikeCountTextView);
ballCounterTV = (TextView) findViewById(R.id.ballCountTextView);
totalOutCounterTV = (TextView) findViewById(R.id.totalOutsTextViewCounter);
strikeCounterButton = (Button) findViewById(R.id.strikeCountButton);
ballCounterButton = (Button) findViewById(R.id.ballCountButton);
strikeCounterButton.setOnClickListener(new OnClickListener(){
@override
public void onClick(View v) {
if (strike_count < 2){
strike_count++;
updateViews();
} else {
// batter has reached strike limit
displayToast(true);
out_count++;
strike_count = 0;
ball_count = 0;
updateViews();
}
}
});
ballCounterButton.setOnClickListener(new OnClickListener(){
@override
public void onClick(View v) {
if (ball_count < 3){
ball_count++;
updateViews();
} else {
// batter has reached ball limit
displayToast(false);
strike_count = 0;
ball_count = 0;
updateViews();
}
}
});
// Check for screen rotation
if (savedInstanceState == null){
strike_count = 0;
ball_count = 0;
} else {
strike_count = savedInstanceState.getInt("STRIKES");
ball_count = savedInstanceState.getInt("BALLS");
}
// Save 'totalOuts' variable through application exit
SharedPreferences savedObject = getPreferences(Context.MODE_PRIVATE);
out_count = savedObject.getInt(getString(R.string.total_outs_key), 0);
updateViews();
}
@override
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
Log.d(TAG, "onSaveInstanceState() called");
savedInstanceState.putInt("STRIKES", strike_count);
savedInstanceState.putInt("BALLS", ball_count);
savedInstanceState.putInt("OUTS", out_count);
}
@override
public boolean onCreateOptionsMenu(Menu menu) {
//Displays actionbar items in app actionbar
getMenuInflater().inflate(R.menu.actionbar_layout, menu);
return super.onCreateOptionsMenu(menu);
}
@override
public boolean onOptionsItemSelected(MenuItem item){
super.onOptionsItemSelected(item);
switch (item.getItemId()){
case (R.id.reset_option):
strike_count = 0;
ball_count = 0;
updateViews();
return true;
case (R.id.about_menu_option):
Intent i = new Intent(this, About.class);
startActivity(i);
return true;
case (R.id.settings_menu_option):
Intent j = new Intent(this, SettingsActivity.class);
startActivity(j);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@override
public void onStart() {
super.onStart();
Log.d(TAG, "onStart() called");
}
@override
public void onPause() {
super.onPause();
Log.d(TAG, "onPause() called");
}
@override
public void onResume() {
super.onResume();
Log.d(TAG, "onResume() called");
}
@override
public void onStop() {
super.onStop();
Log.d(TAG, "onStop() called");
SharedPreferences out_file = getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = out_file.edit();
editor.putInt(getString(R.string.total_outs_key), out_count);
editor.commit();
}
@override
public void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy() called");
}
}
package edu.umkc.baldwin;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
public class SettingsActivity extends Activity {
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_layout);
FragmentManager ttsFragmentManager = getFragmentManager();
FragmentTransaction ttsFragmentTransaction = ttsFragmentManager.beginTransaction();
EnableTTSPreferenceFragment ttsFragment = new EnableTTSPreferenceFragment();
ttsFragmentTransaction.add(R.id.tts_fragment, ttsFragment);
ttsFragmentTransaction.commit();
FragmentManager resetFragmentManager = getFragmentManager();
FragmentTransaction resetFragmentTransaction = resetFragmentManager.beginTransaction();
ResetFragment resetFragment = new ResetFragment();
resetFragmentTransaction.add(R.id.reset_fragment, resetFragment);
resetFragmentTransaction.commit();
}
}
package edu.umkc.baldwin;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class ResetFragment extends Fragment {
@override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View resetFragment = inflater.inflate(R.layout.reset_layout, container, false);
return resetFragment;
}
}
package edu.umkc.baldwin;
import android.os.Bundle;
import android.preference.PreferenceFragment;
public class EnableTTSPreferenceFragment extends PreferenceFragment {
@override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.tts_preference_fragment);
}
@override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
}

To modify anything in your activity from one of its child Fragments you would typically create an interface in the Fragment and have the activity implement that. That interface would either contain one method setting all three vars or multiple ones, one for each variable. To call the methods in the interface call getActivity() and typecast it to the interface.

Load Image from RSS Enclosure tag???

Hello everyone.
I am trying to load the Images in an listview that the RSS provides me.
http://www.nutech.nl/rss is the rss i use.
i want to load the image in listview from these tags
<enclosure> </enclosure (
Code:
<enclosure url="http://media.nu.nl/m/m1nx89taa599_sqr256.jpg" length="None" type="image/jpeg"></enclosure>
)
Now i have tried several things i found on google but none worked or werent explaining enough.
Here is some of my main Codes
RSSreader.java
Code:
package com.thedutch.technews;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import android.os.StrictMode;
public class RSSReader {
DefaultHttpClient httpClient = new DefaultHttpClient();
public Document getRSSFromServer(String url) {
Document response = null;
response = getDomFromXMLString(getFeedFromServer(url));
return response;
}
private String getFeedFromServer(String url) {
String xml = null;
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
try {
HttpGet httpget =new HttpGet(url);
//HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpget);
HttpEntity httpEntity = httpResponse.getEntity();
xml = EntityUtils.toString(httpEntity);
} catch (Exception e) {
e.printStackTrace();
}
return xml;
}
private Document getDomFromXMLString(String xml) {
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(xml));
doc = db.parse(is);
} catch (Exception e) {
}
return doc;
}
public String getValue(Element item, String key) {
NodeList nodeList = item.getElementsByTagName(key);
return this.getElementValue(nodeList.item(0));
}
public final String getElementValue(Node node) {
Node child;
if (node != null) {
if (node.hasChildNodes()) {
for (child = node.getFirstChild(); child != null; child = child
.getNextSibling()) {
if (child.getNodeType() == Node.TEXT_NODE) {
return child.getNodeValue();
}
}
}
}
return "";
}
}
Nutech.java
Code:
package com.thedutch.technews;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import com.faizmalkani.floatingactionbutton.FloatingActionButton;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class Nutech extends Fragment implements OnClickListener{
String key_items = "item";
String key_title = "title";
String key_description = "description";
String key_link = "link";
String key_date = "pubDate";
ListView lstPost = null;
List<HashMap<String, Object>> post_lists = new ArrayList<HashMap<String, Object>>();
List<String> lists = new ArrayList<String>();
ArrayAdapter<String> adapter23 = null;
RSSReader rssfeed = new RSSReader();
FloatingActionButton mFab;
public static Fragment newInstance(Context context) {
Nutech f = new Nutech();
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(
R.layout.activity_main4, container, false);
((MainActivity) getActivity())
.setActionBarTitle("Nutech");
mFab = (FloatingActionButton) view.findViewById(R.id.fabbutton);
mFab.setOnClickListener(this);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (Appstatus.getInstance(getActivity()).isOnline()) {
lstPost = (ListView) getView().findViewById(R.id.lstPosts);
mFab = (FloatingActionButton) getView().findViewById(R.id.fabbutton);
mFab.listenTo(lstPost);
adapter23 = new ArrayAdapter<String>(getActivity(),
R.layout.feed_list_item, R.id.title, lists) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TextView txt1 = (TextView) view
.findViewById(R.id.title);
TextView txt2 = (TextView) view
.findViewById(R.id.desc);
TextView txt3 = (TextView) view
.findViewById(R.id.date);
HashMap<String, Object> data = post_lists.get(position);
txt1.setText(data.get(key_title).toString());
txt2.setText(data.get(key_description).toString());
txt3.setText(data.get(key_date).toString());
return view;
}
};
Document xmlFeed = rssfeed
.getRSSFromServer("http://www.nutech.nl/rss");
NodeList nodes = xmlFeed.getElementsByTagName("item");
for (int i = 0; i < nodes.getLength(); i++) {
Element item = (Element) nodes.item(i);
HashMap<String, Object> feed = new HashMap<String, Object>();
feed.put(key_title, rssfeed.getValue(item, key_title));
feed.put(key_description, rssfeed.getValue(item, key_description));
feed.put(key_link, rssfeed.getValue(item, key_link));
feed.put(key_date, rssfeed.getValue(item, key_date));
post_lists.add(feed);
lists.add(feed.get(key_title).toString());
}
lstPost.setAdapter(adapter23);
lstPost.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
if (Appstatus.getInstance(getActivity()).isOnline()) {
Document xmlFeed = rssfeed
.getRSSFromServer("http://www.nutech.nl/rss");
NodeList nodes = xmlFeed.getElementsByTagName("item");
Element item = (Element) nodes.item(position);
Intent indisplay = new Intent(getActivity(),PostViewActivity.class);
indisplay.putExtra("link", rssfeed.getValue(item, key_link));
startActivity(indisplay);
} else {
getActivity().setContentView(R.layout.activity_main3);
Thread background = new Thread() {
public void run() {
try {
sleep(5*1100);
getActivity().finish();
} catch (Exception e) {
}
}
};
background.start();
}
}
});
lstPost.setLongClickable(true);
lstPost.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int position, long id) {
if (Appstatus.getInstance(getActivity()).isOnline()) {
Document xmlFeed = rssfeed
.getRSSFromServer("http://www.nutech.nl/rss");
NodeList nodes = xmlFeed.getElementsByTagName("item");
Element item = (Element) nodes.item(position);
final Intent wintent = new Intent(Intent.ACTION_VIEW).setData(Uri.parse(rssfeed.getValue(item, key_link)));
startActivity(wintent);
return true;
} else {
getActivity().setContentView(R.layout.activity_main3);
Thread background = new Thread() {
public void run() {
try {
sleep(5*1100);
getActivity().finish();
} catch (Exception e) {
}
}
};
background.start();
}
return true;
}
});
} else {
getActivity().setContentView(R.layout.activity_main3);
Thread background = new Thread() {
public void run() {
try {
sleep(5*1100);
getActivity().finish();
} catch (Exception e) {
}
}
};
background.start();
}
}
public void fabClicked(View view) {
adapter23.notifyDataSetChanged();
}
@Override
public void onClick(View v) {
adapter23.notifyDataSetChanged();
this.adapter23.notifyDataSetChanged();
lstPost.invalidateViews();
lstPost.refreshDrawableState();
Toast.makeText(this.getActivity(),
"Refreshed Nutech News!", Toast.LENGTH_LONG).show();
}
public void hideFab(View view) {
mFab.hide(true);
//getActionBar().hide();
}
public void showFab(View view) {
mFab.hide(false);
//getActionBar().show();
}
}
MainActivity.java
Code:
package com.thedutch.technews;
import java.util.ArrayList;
import com.google.analytics.tracking.android.EasyTracker;
import com.google.analytics.tracking.android.MapBuilder;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.Toolbar;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private EasyTracker easyTracker = null;
private Toolbar mToolbar;
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private ListView mDrawerList;
private ArrayList<ListMenuModel> mListMenu;
private ListMenuAdapter mListMenuAdapter;
final String[] data ={"Nutech","Tweakers","Hardware Info"};
final String[] fragmentos ={
"com.thedutch.technews.Nutech",
"com.thedutch.technews.Tweakers",
"com.thedutch.technews.Hardwareinfo"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
easyTracker = EasyTracker.getInstance(MainActivity.this);
mToolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
setSupportActionBar(mToolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mListMenu = new ArrayList<ListMenuModel>();
mListMenu.add(new ListMenuModel("Nutech", "Nutech", R.drawable.ic_nu));
mListMenu.add(new ListMenuModel("Tweakers", "Tweakers", R.drawable.ic_tweakers));
mListMenu.add(new ListMenuModel("Hardware Info", "Hardware Info", R.drawable.ic_hardwareinfo));
mListMenuAdapter = new ListMenuAdapter(getApplicationContext(),
mListMenu);
mDrawerList.setAdapter(mListMenuAdapter);
mDrawerList.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, final int pos,long id){
mDrawerToggle.syncState();
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.content_frame, Fragment.instantiate(MainActivity.this, fragmentos[pos]));
tx.commit();
mDrawerList.setSelection(pos);
easyTracker.send(MapBuilder.createEvent("Nav Drawer",
"Opened Navigation Drawer", "Navigation Drawer", null).build());
mDrawerLayout.closeDrawer(mDrawerList);
}
});
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.content_frame,Fragment.instantiate(MainActivity.this, fragmentos[0]));
tx.commit();
mDrawerToggle = new ActionBarDrawerToggle(
this,
mDrawerLayout,
mToolbar,
R.string.drawer_open,
R.string.drawer_close){
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
syncState();
}
};
// Set the drawer toggle as the DrawerListener
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerToggle.syncState();
mToolbar.setClickable(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case R.id.about:
Intent intent = new Intent(this, AboutActivity.class);
this.startActivity(intent);
easyTracker.send(MapBuilder.createEvent("AboutActivity",
"Entered About Page", "about", null).build());
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
public void setActionBarTitle(String title) {
getSupportActionBar().setTitle(title);
}
@Override
public void onBackPressed() {
if(mDrawerLayout.isDrawerOpen(Gravity.START|Gravity.LEFT)){
mDrawerLayout.closeDrawers();
return;
}
super.onBackPressed();
}
public void fabClicked(View view) {
Toast.makeText(this, "Refreshed.", Toast.LENGTH_LONG).show();
}
@Override
public void onStart() {
super.onStart();
EasyTracker.getInstance(this).activityStart(this);
}
@Override
public void onStop() {
super.onStop();
EasyTracker.getInstance(this).activityStop(this);
}
}
is there someone who could help me ?
thank you

After few months i still havent found a solution or idea.
anyone here has ?

Use a RSS parsing library
Use my AndroidWithoutStupid Java library. It is on GitHub. There is also an article about the usage on CodeProject.
Enclosure tag is usually used for mp3 files but it doesn't matter.
After getting the enclosure value using the MvNewsFeed class, you need to download it. Use MvAsyncDownload for that. Then, use BitmapFactory.decodeFile() or a similar method to display the image in an ImageView.
SpaceCaker said:
After few months i still havent found a solution or idea.
anyone here has ?
Click to expand...
Click to collapse

[Q] How to pass image from one intent to another

Hi friends,
Here is my code for displaying details and images from MySQL database,All i want to do is pass the detail with image to other inner page through intent.Please help me im new in android.
Activity 1
Code:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.annotation.SuppressLint;
import android.app.ActionBar.LayoutParams;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
@SuppressLint("NewApi") public class News_events extends Fragment {
private String jsonResult;
private String url = "<URL PHP FILES>";
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
ProgressDialog dialog = null;
ImageView img;
Bitmap bitmap;
ProgressDialog pDialog;
// alert dialog manager
AlertDialogManager alert = new AlertDialogManager();
// Internet detector
ConnectionDetector cd;
InputStream is=null;
String result=null;
String line=null;
int code;
public News_events(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
pDialog = new ProgressDialog(getActivity());
View rootView = inflater.inflate(R.layout.fragment_news_events, container, false);
cd = new ConnectionDetector(rootView.getContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(getActivity(),
"Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
//return.rootView;
return rootView;
}
accessWebService();
return rootView;
}
// Async Task to access the web
private class JsonReadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(1);
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(params[0]);
try {
httppost.setEntity(new UrlEncodedFormEntity(nameValuePair));
HttpResponse response = httpclient.execute(httppost);
jsonResult = inputStreamToString(
response.getEntity().getContent()).toString();
}
catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = rd.readLine()) != null) {
answer.append(rLine);
}
}
catch (IOException e) {
// e.printStackTrace();
Toast.makeText(getActivity().getApplicationContext(),
"Error..." + e.toString(), Toast.LENGTH_LONG).show();
}
return answer;
}
@Override
protected void onPostExecute(String result) {
display();
}
}// end async task
public void accessWebService() {
JsonReadTask task = new JsonReadTask();
// passes values for the urls string array
task.execute(new String[] { url });
}
// build hash set for list view
public void display() {
try {
JSONObject jsonResponse = new JSONObject(jsonResult);
JSONArray jsonMainNode = jsonResponse.optJSONArray("news_details");
LinearLayout MainLL= (LinearLayout)getActivity().findViewById(R.id.newslayout);
//LinearLayout headLN=(LinearLayout)findViewById(R.id.headsection);
for (int i = 0; i < jsonMainNode.length(); i++) {
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
final String head = jsonChildNode.optString("title");
final String details = jsonChildNode.optString("text");
final String date = jsonChildNode.optString("date");
final String image = jsonChildNode.optString("img");
//final String time = jsonChildNode.optString("time");
//img = new ImageView(this.getActivity());
//new LoadImage().execute("<URL IMAGE FOLDER>"+image);
img = new ImageView(this.getActivity());
LoadImage ldimg=new LoadImage();
ldimg.setImage(img);
ldimg.execute("<URL IMAGE FOLDER>"+image);
TextView headln = new TextView(this.getActivity());
headln.setText(head); // News Headlines
headln.setTextSize(16);
headln.setTextColor(Color.BLACK);
headln.setGravity(Gravity.CENTER);
headln.setBackgroundColor(Color.parseColor("#ffcd14"));
// headln.setBackgroundResource(R.drawable.menubg);
headln.setPadding(0, 20, 0, 0);
// headln.setHeight(50);
headln.setClickable(true);
TextView dateln = new TextView(this.getActivity());
dateln.setText(date); // News Headlines
dateln.setTextSize(12);
dateln.setTextColor(Color.BLACK);
dateln.setGravity(Gravity.RIGHT);
//dateln.setBackgroundColor(Color.parseColor("#f20056"));
dateln.setBackgroundColor(0x00000000);
dateln.setPadding(0, 0, 10, 10);
dateln.setWidth(100);
dateln.setClickable(true);
View sep=new View(this.getActivity());
sep.setBackgroundColor(Color.parseColor("#252525"));
sep.setMinimumHeight(10);
TextView detailsln = new TextView(this.getActivity());
detailsln.setText(details); // News Details
detailsln.setTextSize(12);
detailsln.setTextColor(Color.BLACK);
detailsln.setGravity(Gravity.CENTER);
detailsln.setPadding(10, 10, 10, 10);
int width = LayoutParams.WRAP_CONTENT;
int height = 200;
LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,height);
img.setLayoutParams(parms);
parms.gravity = Gravity.CENTER;
img.setPaddingRelative (15, 15, 15, 15);
MainLL.addView(headln);
MainLL.addView(dateln);
// MainLL.addView(photo);
MainLL.addView(img);
MainLL.addView(detailsln);
MainLL.addView(sep);
img.setClickable(true);
headln.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//Toast.makeText(getBaseContext(), head, Toast.LENGTH_SHORT).show();
Intent intent = new Intent(getActivity().getApplicationContext(),InnerNewsAndEvents.class);
intent.putExtra("head",head.toString());
intent.putExtra("details",details.toString());
intent.putExtra("date",date.toString());
intent.putExtra("img",img.toString());
// intent.putExtra("time",time.toString());
startActivity(intent);
}
});
dateln.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(getActivity().getApplicationContext(),InnerNewsAndEvents.class);
intent.putExtra("head",head.toString());
intent.putExtra("details",details.toString());
intent.putExtra("date",date.toString());
intent.putExtra("img",img.toString());
// intent.putExtra("time",time.toString());
startActivity(intent);
}
});
img.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(getActivity().getApplicationContext(),InnerNewsAndEvents.class);
intent.putExtra("head",head.toString());
intent.putExtra("details",details.toString());
intent.putExtra("date",date.toString());
intent.putExtra("img",img.toString());
// intent.putExtra("time",time.toString());
startActivity(intent);
}
});
}
} catch (JSONException e) {
Toast.makeText(getActivity().getApplicationContext(), "Error" + e.toString(),
Toast.LENGTH_SHORT).show();
}
}
private class LoadImage extends AsyncTask<String, String, Bitmap> {
ImageView img;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog.setMessage("Loading Image ....");
pDialog.show();
}
public void setImage(ImageView img ){
this.img=img;
}
protected Bitmap doInBackground(String... args) {
try {
bitmap = BitmapFactory.decodeStream((InputStream)new URL(args[0]).openStream());
}
catch (Exception e) { e.printStackTrace(); }
return bitmap;
}
protected void onPostExecute(Bitmap image) {
if(image != null){
img.setImageBitmap(image);
pDialog.dismiss();
}
pDialog.dismiss();
}
}
public static boolean isInternetReachable()
{
try {
//make a URL to a known source
URL url = new URL("google");
//open a connection to that source
HttpURLConnection urlConnect = (HttpURLConnection)url.openConnection();
//trying to retrieve data from the source. If there
//is no connection, this line will fail
Object objData = urlConnect.getContent();
} catch (UnknownHostException e) {
e.printStackTrace();
return false;
}
catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
}
Activity 2
Code:
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
public class InnerNewsAndEvents extends Activity {
ProgressDialog pDialog;
ProgressDialog dialog = null;
Bitmap bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inner_news_and_events);
TextView title=(TextView)findViewById(R.id.tvtitle);
TextView details=(TextView)findViewById(R.id.tvdetails);
ImageView img=(ImageView)findViewById(R.id.imgpic);
Intent intent = getIntent();
String strhead = intent.getStringExtra("head");
String strdetails = intent.getStringExtra("details");
String strdate = intent.getStringExtra("date");
String strimg = intent.getStringExtra("img");
title.setText(strhead);
details.setText(strdetails);
}
}
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
public class InnerNewsAndEvents extends Activity {
ProgressDialog pDialog;
ProgressDialog dialog = null;
Bitmap bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inner_news_and_events);
TextView title=(TextView)findViewById(R.id.tvtitle);
TextView details=(TextView)findViewById(R.id.tvdetails);
ImageView img=(ImageView)findViewById(R.id.imgpic);
Intent intent = getIntent();
String strhead = intent.getStringExtra("head");
String strdetails = intent.getStringExtra("details");
String strdate = intent.getStringExtra("date");
String strimg = intent.getStringExtra("img");
title.setText(strhead);
details.setText(strdetails);
}
}

Database Users

welcome

[Q] Socket code throws NullPointerException in OnsensorChanged - Java for Android App Development

you have to set the variable in onpostexecute() and also use Code: new MyTask().execute().get() so you make sure the async task has finished for sure

Can u gv example ? warlock9_0 said: you have to set the variable in onpostexecute() and also use Code: new mytask().execute().get() so you make sure the async task has finished for sure Click to expand... Click to collapse frend can u give me an example ?

null async task not completed because of socket not closed?

Thank u bro..some how i managed to get it work..thanks a lot for ur time..and nice to meet u..

Related

Help with ViewPager and Fragments

Pass Connection Between Intents

How to make the buttons in a fragment manipulate integer variables in seperate activi

Load Image from RSS Enclosure tag???

[Q] How to pass image from one intent to another

Categories

Resources