Database Users

[Q] Connecting From Android Client to Windows Server

Hi every one, all im trying to do is make it so when you press a button from android it would connect to the server and send a message to servers console saying connected
This is what i have so far
ANDROID CLIENT
Code:
package com.alexandernapoles.shutdown;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class SocketClient extends Activity implements Runnable {
private Button ok;
private Socket kkSocket;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ok = (Button)findViewById(R.id.Button01);
}
public void connectto(){
try {
kkSocket = new Socket("192.168.0.196", 4321);
} catch (UnknownHostException e) {
errorMessage("Unknown host" + "192.168.0.196");
} catch (IOException e) {
errorMessage("Couldn't get I/O for the connection to: " + "192.168.0.196");
}
}
private void errorMessage(String string) {
// TODO Auto-generated method stub
}
@Override
public void run() {
// TODO Auto-generated method stub
}
public void onClick(View src) {
// TODO Auto-generated method stub
switch(src.getId()){
case R.id.Button01:
connectto();
break;
}
}
}
JAVA SERVER
Code:
package main;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
public class Server
{
private static ServerSocket sSocket;
public static void main(String args[])
{
try {
sSocket = new ServerSocket(4321,1,InetAddress.getByName("192.168.0.196"));
sSocket.bind(sSocket.getLocalSocketAddress());
boolean listening = true;
while(listening) {
if (sSocket == null) {
sSocket = new ServerSocket(4321,1,InetAddress.getByName("192.168.0.196"));
}
Socket sock = sSocket.accept();
new Thread((Runnable) sock).start();
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
So far this doesnt work. im lost D:
Please help me.

doesnt work how?
1) windows firewall might block it?
2) android permissions.. did you remember to give your app the internet permissions?

What's not working? It appears from your code that your client is connecting, but that's it. No data is transfered either way.

How do I make it send a message to the server saying it is connected?
Sent from my Samsung Epic 4g.

xsxbluexsx said:
How do I make it send a message to the server saying it is connected?
Sent from my Samsung Epic 4g.
Click to expand...
Click to collapse
You have to wrap your sockets with IOStreams. See:
Socket.getInputStream()
and
Socket.getOutputStream()
at:
http://developer.android.com/reference/java/net/Socket.html
This is really beyond the scope of android development and is a basic concept of Java development in general. Search for a Java tutorial on socket programming and try to get that down before attempting it on the android.

Is there any example you can give me for a client in android
Sent from my Samsung Epic 4g.

This is off the top of my head, but try adding something like this to your connectto() function:
Code:
public void connectto(){
try {
kkSocket = new Socket("192.168.0.196", 4321);
} catch (UnknownHostException e) {
errorMessage("Unknown host" + "192.168.0.196");
} catch (IOException e) {
errorMessage("Couldn't get I/O for the connection to: " + "192.168.0.196");
}
[COLOR="Blue"] String s=new String("Hello World\n");
DataOutputStream out = DataOutputStream(kkSocket.getOutputStream());
out.writeBytes(s);
out.flush();
kkSocket.close();
[/COLOR] }

ProgressBar not working

Hey, I was working on progress Bars. But I am having a little trouble. On the following code, The bar seems to work perfectly, but just when its done loading. The app crashes. Please help me out. Thanks in advance
Code:
package com.example.progresses;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.ProgressBar;
public class MainActivity extends Activity {
ProgressBar b;
int progressStatus = 0;
static int progress = 0;
Thread t;
Handler hand = new Handler();
[user=439709]@override[/user]
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b = (ProgressBar) findViewById(R.id.progressBar1);
b.setMax(200);
new Thread(new Runnable() {
public void run() {
while (progressStatus <= 200) {
progressStatus = doWork();
hand.post(new Runnable() {
public void run() {
b.setProgress(progressStatus);
}
});
}
b.setVisibility(View.GONE);
}
}).start();
}
private int doWork() {
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ++progress;
}
}
LOGCAT

You have to do this via the handler, too:
Code:
b.setVisibility(View.GONE);
Every action regarding the UI from another thread has to be done via an handler.

nikwen said:
You have to do this via the handler, too:
Code:
b.setVisibility(View.GONE);
Every action regarding the UI from another thread has to be done via an handler.
Click to expand...
Click to collapse
Thank you!

hiphop12ism said:
Thanks you!
Click to expand...
Click to collapse
Welcome.

[Q] Code placement for writing TCP/IP data to TextView

Hello,
I am a first time poster new to Android app development so please bear with me. I am currently working off of two great TCP/IP Client examples. My goal is to create a simple TCP/IP Client that connects to a server and, once a connection is established, continuously updates a TextView with strings passed from the server. If the user presses a button, the client sends a stop command to the server and I would ultimately like to expand the TextView into a graph with the converted string values. I am able to establish the connection to the server and send the stop command from the client but my attempts at adding the read capability have, so far, been unsuccessful with the app crashing as soon as it starts up.
Since it is my first time posting, I am not allowed to link the examples I am using. If anyone is interested in seeing them, however, they are posts from the android-er blog titled: "Android Server/Client example - client side using Socket" and "Bi-directional communication between Client and Server, using ServerSocket, Socket, DataInputStream and DataOutputStream".
Here is the code in my MainActivity:
Code:
package com.example.androidclient;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
TextView textResponse;
TextView textIn;
EditText editTextAddress, editTextPort;
Button buttonConnect, buttonStopTest, buttonDisconnect;
Socket socket = null;
DataInputStream incomingString = null;
DataOutputStream terminalLetter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
editTextAddress = (EditText)findViewById(R.id.address);
editTextPort = (EditText)findViewById(R.id.port);
buttonConnect = (Button)findViewById(R.id.connect);
buttonDisconnect = (Button)findViewById(R.id.disconnect);
buttonStopTest = (Button)findViewById(R.id.stop_test);
textResponse = (TextView)findViewById(R.id.response);
textIn = (TextView)findViewById(R.id.text_in);
buttonConnect.setOnClickListener(buttonConnectOnClickListener);
buttonStopTest.setOnClickListener(buttonStopTestOnClickListener);
buttonDisconnect.setOnClickListener(buttonDisconnectOnClickListener);
}
OnClickListener buttonConnectOnClickListener = new OnClickListener(){
//setOnClickListener sets a callback to be invoked when the button is clicked
@Override
public void onClick(View arg0) {
//Clicking button (Connect) calls a MyClientTask defined below.
MyClientTask myClientTask = new
MyClientTask(editTextAddress.getText().toString(),
Integer.parseInt(editTextPort.getText().toString()));
myClientTask.execute();
}
};
OnClickListener buttonStopTestOnClickListener = new OnClickListener(){
//setOnClickListener sets a callback to be invoked when the button is clicked
@Override
public void onClick(View arg0) {
try {
terminalLetter = new DataOutputStream(socket.getOutputStream());
terminalLetter.writeByte('b');
terminalLetter.writeByte('\n');
terminalLetter.close();
socket.close();
}
catch (IOException e) {
System.err.println("Couldn't get I/O for the connection.");
}
}
};
OnClickListener buttonDisconnectOnClickListener = new OnClickListener(){
//setOnClickListener sets a callback to be invoked when the button is clicked
@Override
public void onClick(View arg0) {
try {
socket.close();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
public class MyClientTask extends AsyncTask<Void, Void, Void> {
String IPaddress;
int Port;
String response = "";
MyClientTask(String addr, int port){
IPaddress = addr;
Port = port;
}
@Override
protected Void doInBackground(Void... arg0) {
//Took socket declaration from here.
try {
//Taking relevant parameters and applying them to socket
socket = new Socket(IPaddress, Port);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(1024);
byte[] buffer = new byte[1024];
int bytesRead;
InputStream inputStream = socket.getInputStream();
incomingString = new DataInputStream(socket.getInputStream());
textIn.setText(incomingString.readUTF());
/*
* notice:
* inputStream.read() will block if no data return
*/
while ((bytesRead = inputStream.read(buffer)) != -1){
byteArrayOutputStream.write(buffer, 0, bytesRead);
response += byteArrayOutputStream.toString("UTF-8");
}
}
catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
response = "UnknownHostException: " + e.toString();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
response = "IOException: " + e.toString();
}
finally{
if(socket != null){
try {
socket.close();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
textResponse.setText(response);
super.onPostExecute(result);
}
}
}
I put the commands for reading data from the server and writing it to the TextView with the code that sets up the connection to the socket. The idea was that it would be the next step after the connection is established but I realize that it looks like I am only reading once. I tried adding a while loop and bringing it out of the doInBackground. In each case, all I got was the whole app crashing on me. It looks fairly straight forward in the example but there the connection is automatic, not triggered and I have not been able to modify the code successfully.
I am still new to Android and this feels like it is an important part of app development so I am hoping someone in the community can help me understand where the section of code relevant to reading data (continuously) should be placed in relation to the rest.
Best,
Yusif Nurizade
P.S. I was going to include the fragment but, since the post is long enough, I chose to omit it. I can share upon request and the logcat.

Radio app into a service

Hi I was looking for tutorials to make a radio app so I followed this one but the problem is that as soon as the app closes the music stops, how do I turn it into a service. Thanks
Code:
import android.app.Activity;
import android.os.Bundle;
import java.io.IOException;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
public class myMain extends Activity implements OnClickListener {
private ProgressBar playSeekBar;
private Button buttonPlay;
private Button buttonStopPlay;
private MediaPlayer player;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initializeUIElements();
initializeMediaPlayer();
}
private void initializeUIElements() {
playSeekBar = (ProgressBar) findViewById(R.id.progressBar1);
playSeekBar.setMax(100);
playSeekBar.setVisibility(View.INVISIBLE);
buttonPlay = (Button) findViewById(R.id.buttonPlay);
buttonPlay.setOnClickListener(this);
buttonStopPlay = (Button) findViewById(R.id.buttonStopPlay);
buttonStopPlay.setEnabled(false);
buttonStopPlay.setOnClickListener(this);
}
public void onClick(View v) {
if (v == buttonPlay) {
startPlaying();
} else if (v == buttonStopPlay) {
stopPlaying();
}
}
private void startPlaying() {
buttonStopPlay.setEnabled(true);
buttonPlay.setEnabled(false);
playSeekBar.setVisibility(View.VISIBLE);
player.prepareAsync();
player.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
player.start();
}
});
}
private void stopPlaying() {
if (player.isPlaying()) {
player.stop();
player.release();
initializeMediaPlayer();
}
buttonPlay.setEnabled(true);
buttonStopPlay.setEnabled(false);
playSeekBar.setVisibility(View.INVISIBLE);
}
private void initializeMediaPlayer() {
player = new MediaPlayer();
try {
player.setDataSource("stream url");
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
playSeekBar.setSecondaryProgress(percent);
Log.i("Buffering", "" + percent);
}
});
}
@Override
protected void onPause() {
super.onPause();
if (player.isPlaying()) {
player.stop();
}
}
}

benpaterson said:
Hi I was looking for tutorials to make a radio app so I followed this one but the problem is that as soon as the app closes the music stops, how do I turn it into a service. Thanks
Code:
import android.app.Activity;
import android.os.Bundle;
import java.io.IOException;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
public class myMain extends Activity implements OnClickListener {
private ProgressBar playSeekBar;
private Button buttonPlay;
private Button buttonStopPlay;
private MediaPlayer player;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initializeUIElements();
initializeMediaPlayer();
}
private void initializeUIElements() {
playSeekBar = (ProgressBar) findViewById(R.id.progressBar1);
playSeekBar.setMax(100);
playSeekBar.setVisibility(View.INVISIBLE);
buttonPlay = (Button) findViewById(R.id.buttonPlay);
buttonPlay.setOnClickListener(this);
buttonStopPlay = (Button) findViewById(R.id.buttonStopPlay);
buttonStopPlay.setEnabled(false);
buttonStopPlay.setOnClickListener(this);
}
public void onClick(View v) {
if (v == buttonPlay) {
startPlaying();
} else if (v == buttonStopPlay) {
stopPlaying();
}
}
private void startPlaying() {
buttonStopPlay.setEnabled(true);
buttonPlay.setEnabled(false);
playSeekBar.setVisibility(View.VISIBLE);
player.prepareAsync();
player.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
player.start();
}
});
}
private void stopPlaying() {
if (player.isPlaying()) {
player.stop();
player.release();
initializeMediaPlayer();
}
buttonPlay.setEnabled(true);
buttonStopPlay.setEnabled(false);
playSeekBar.setVisibility(View.INVISIBLE);
}
private void initializeMediaPlayer() {
player = new MediaPlayer();
try {
player.setDataSource("stream url");
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
playSeekBar.setSecondaryProgress(percent);
Log.i("Buffering", "" + percent);
}
});
}
@Override
protected void onPause() {
super.onPause();
if (player.isPlaying()) {
player.stop();
}
}
}
Click to expand...
Click to collapse
You'll have to learn about Android Service and extend that, instead of Activity.

How to add sound with ImageSwitcher

Respected developers , I m creating app of alphabets , I am unable to add sound with imageswitcher,
I want when user press next button , It should give next image with its sound
my code is
Code:
I have sound in Row folder name a,b,c
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.ViewSwitcher.ViewFactory;
public class New extends ActionBarActivity implements ViewFactory {
ImageSwitcher is;
int [] imgid = {R.drawable.i1,
R.drawable.i2,
R.drawable.i3,
R.drawable.i4};
Button prev, next;
int count =0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.poetry);
final Button switchact = (Button) findViewById(R.id.btn1);
switchact.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent act2 = new Intent(view.getContext(), MainActivity.class);
startActivity(act2);
}
});
is = (ImageSwitcher)findViewById(R.id.imageSwitcher1);
prev = (Button)findViewById(R.id.button1);
next = (Button)findViewById(R.id.button2);
is.setFactory(this);
is.setInAnimation(this, android.R.anim . slide_in_left);
is.setOutAnimation(this, android.R.anim.slide_out_right);
prev.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(count>0)
{
count--;
try{
is.setImageResource(imgid[count]);
}
catch(Exception e)
{
e.printStackTrace();
}
}
else
{
Toast.makeText(New.this, "First", Toast.LENGTH_LONG).show();
}
}
});
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(count<imgid.length)
{
try{
is.setImageResource(imgid[count]);
}
catch(Exception e)
{
e.printStackTrace();
}
count++;
}
else
{
Toast.makeText(New.this, "Last", Toast.LENGTH_LONG).show();
}
}
});
}
@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;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public boolean appnot(View v){
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "http://rafeeqsir.in";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "I found a best Urdu Learing App Please try");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
return false;
}
public void about(View v){
{
new AlertDialog.Builder(this)
.setTitle(R.string.app_about)
.setNegativeButton(R.string.str_ok,
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialoginterface, int i)
{
}
})
.show();
}
}
public void exit(View v){
{
new AlertDialog.Builder(this)
.setTitle(R.string.app_exit)
.setIcon(R.drawable.ic_launcher)
.setMessage(R.string.app_exit_message)
.setNegativeButton(R.string.exit,
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialoginterface, int i)
{
System.exit(0);
}
})
.show();
}
}
@Override
public View makeView() {
// TODO Auto-generated method stub
ImageView iv = new ImageView(this);
iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
iv.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return iv;
}
}
please help me about it