I am trying to get a value that user enters into a Dialog, using the recommended DialogFragment class for it, the Dialog constructs and runs fine, but I cannot return the value of the EditText parameter to the parent class, without get a Null pointer exception.
My DialogHost class, this constructs, returns and links the parent to its buttons.
Code:
package jo.app.co;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
public class DialogHost extends DialogFragment {
public interface NoticeDialogListener {
public void onDialogPositiveClick(DialogFragment dialog);
public void onDialogNegativeClick(DialogFragment dialog);
}
NoticeDialogListener mListener;
[user=439709]@override[/user]
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (NoticeDialogListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString());
}
}
[user=439709]@override[/user]
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.dialog_add, null))
.setPositiveButton("Save", new DialogInterface.OnClickListener() {
[user=439709]@override[/user]
public void onClick(DialogInterface dialog, int id) {
mListener.onDialogPositiveClick(DialogHost.this);
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
DialogHost.this.getDialog().cancel();
}
});
return builder.create();
}
}
My MainActivity
Code:
package jo.app.co;
import android.app.DialogFragment;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.widget.EditText;
public class MainActivity extends FragmentActivity implements DialogHost.NoticeDialogListener {
[user=439709]@override[/user]
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
showNoticeDialog();
}
public void showNoticeDialog() {
DialogFragment dialog = new DialogHost();
dialog.show(getFragmentManager(), "DialogHost");
}
[user=439709]@override[/user]
public void onDialogPositiveClick(DialogFragment dialog) {
EditText myText = (EditText) findViewById(R.id.item_added);
try {
Log.d ("IN TRY", myText.getText().toString());
}
catch (Exception e) {
Log.e ("IN CATCH", e.toString());
}
}
[user=439709]@override[/user]
public void onDialogNegativeClick(DialogFragment dialog) {
Log.d ("INMAIN", "REACHED NEG");
}
}
This is my layout for the add item dialog.
Code:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText
android:id="@+id/item_added"
android:inputType="text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginBottom="4dp"
android:hint="@string/hint_add_item" />
</LinearLayout>
It's because in your main activity you are trying to call findViewById:
swapnilraj said:
Code:
[user=439709]@override[/user]
public void onDialogPositiveClick(DialogFragment dialog) {
EditText myText = (EditText) findViewById(R.id.item_added);
try {
Log.d ("IN TRY", myText.getText().toString());
}
catch (Exception e) {
Log.e ("IN CATCH", e.toString());
}
}
Click to expand...
Click to collapse
This is not possible since the layout of the activity is not the one the dialog is using. There are multiple ways of doing this, for instance call findViewById in the dialog's onPositiveButtonListener and pass that value through your interface. It might be that you need to use the LayoutInflator in the onCreateDialog, set
LinearLayout linearl = (LinearLayout) inflater.inflate(...) and get the EditText from there. You then call setView(linearL) instead.
SimplicityApks said:
It's because in your main activity you are trying to call findViewById:
This is not possible since the layout of the activity is not the one the dialog is using. There are multiple ways of doing this, for instance call findViewById in the dialog's onPositiveButtonListener and pass that value through your interface. It might be that you need to use the LayoutInflator in the onCreateDialog, set
LinearLayout linearl = (LinearLayout) inflater.inflate(...) and get the EditText from there. You then call setView(linearL) instead.
Click to expand...
Click to collapse
I tried calling findViewById method in the onClick method in the Dialog class, but the function is not defined for a DialogInterface.onClickListner, I modified it to linearl method you told but I cannot get it to work either.
Could you make the changes in the 2 snippets above, it would be very helpful!
You'll have to setup listeners fo this and pass the string or whetever you want to pass to back to the activity which in its turn can handle it (do it by itself or pass this to another fragement).
Although not so much votes (0) the last answer here on stackoverflow has exeactly what you need.
Related
Ok all i have tried for weeks now to get a simple webview app sorted. i have managed to get this up on the market but it needs a few more features like menu for refresh back forward etc.
It seems nobody really wants to helps so how much will it cost me for you to help with it?
explain a little more, you after someone to code it for you or design the ui ?
Well basically I got a basic webview made from tutorials, but that is about as far as my skills go. I need a few more features like options menu, stop the back button exiting app and go back a page instead and also if possible but not essential change loading bar for loading circle which spins in middle if screen while loading. I have tried to ask for help with what code I need and where to put it but no luck. I pretty much need it coded or at least to be told what code and exactly where in my code I need to fit it in.
Sent from my Desire HD using XDA App
Where have you tried asking? Tackle one issue at a time, and post some example code.
StackOverflow is a great site for programming questions and you should get some good answers there.
But before posting make sure you search first.
The back button shouldnt exit the app if there is a activity that was displayed before it.
cyberpedz said:
Ok finally i have a running webview in the market what i would like to do now is add a soft menu for a back, refresh and forward button what code do i need and where would i put it in my java below?
Code:
package com.windowcleaningforums;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class windowcleaningforums extends Activity
{
final Activity activity = this;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
WebView webView = (WebView) findViewById(R.id.WebView);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress)
{
activity.setTitle(" Loading...");
activity.setProgress(progress * 100);
if(progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
{
// Handle the error
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url);
return true;
}
});
webView.loadUrl("http://www.windowcleaningforums.co.uk");
}
}
Click to expand...
Click to collapse
Sent from my Desire HD using XDA App
Sent from my Desire HD using XDA App
I found this tutorial after a quick google search - http://kahdev.wordpress.com/2008/11/25/building-a-menu-for-your-android-v10-r1-app/
It seems quite simple to follow. Let me know if you have any issues and I try give you an example for your code tonight.
Ok I have edited your code to add a menu, and also to set the back button of the phone to go back to the previous page in the webview, instead of previous activity.
I found the code for this here
I have commented bits of the code so hopefully its understandable.
If you have any questions or it doesn't work let me know.
Don't just take what I have done and use it (although you can). Go through it and make sure you understand what I have done. That's the only way you will learn app development.
Code:
package com.windowcleaningforums;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class windowcleaningforums extends Activity {
final Activity activity = this;
//DECLARE webview variable outside of onCreate function so we can access it in other functions (menu)
public WebView webView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.WebView);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setTitle(" Loading...");
activity.setProgress(progress * 100);
if (progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// Handle the error
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
webView.loadUrl("http://www.windowcleaningforums.co.uk");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
//Add menu items, second value is the id, use this in the onOptionsItemSelected
menu.add(0,1, 0, "Back");
menu.add(0, 2, 0, "Forward");
return true;
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
switch (item.getItemId()){
//If the ID equals 1 , go back
case 1:
webView.goBack();
return true;
//If the ID equals 2 , go forward
case 2 :
webView.goForward();
return true;
}
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
I have seen these tutorials but my problem is I don't know how to fit it into my webview where should I add this in my code
Sent from my Desire HD using XDA App
Have a look at the code I posted.
What we are basically doing is adding new functions (or methods) inside our activity class. When I first started app development I also got confused as to where to add things.
These new methods override methods built into the activity, so we don't want to put them inside our onCreate method (where everything goes for setting up the activity, and where all your current code resides).
So we put them at any position after the closing brace of our onCreate. I've put them at the end.
I also moved the declaration of the webView variable to outside the onCreate method, so we can access it in the other functions we added.
Thank you so much I will look at this properly when I next get chance on my pc. thanks again for the help and taking the time to explain.
Sent from my Desire HD using XDA App
Thank you have have looked over the code and even added another button!
I have also added icons for each menu item after looking over some other code but not sure if i have done it correctly. they dont show untill the menu item has been clicked once. how can i get them to show right away? i put the images in res/drawable and called then in the code below, is this the correct way to do it?
Code:
package com.windowcleaningforums;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class windowcleaningforums extends Activity {
final Activity activity = this;
//DECLARE webview variable outside of onCreate function so we can access it in other functions (menu)
public WebView webView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.WebView);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setTitle(" Loading...");
activity.setProgress(progress * 100);
if (progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// Handle the error
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
webView.loadUrl("http://www.windowcleaningforums.co.uk");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
//Add menu items, second value is the id, use this in the onOptionsItemSelected
menu.add(0,1, 0, "Back");
menu.add(0, 2, 0, "Forward");
menu.add(0, 3, 0, "Refresh");
return true;
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
switch (item.getItemId()){
//If the ID equals 1 , go back
case 1:
webView.goBack();
item.setIcon(R.drawable.back);
return true;
//If the ID equals 2 , go forward
case 2 :
webView.goForward();
item.setIcon(R.drawable.forward);
return true;
//If the ID equals 3 , go back
case 3:
webView.reload();
item.setIcon(R.drawable.refresh);
return true;
}
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
Comments below (marked -->), I'm not going to give you the answer, you need to understand why more that how.
Code:
package com.windowcleaningforums;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class windowcleaningforums extends Activity {
final Activity activity = this;
//DECLARE webview variable outside of onCreate function so we can access it in other functions (menu)
public WebView webView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.WebView);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setTitle(" Loading...");
activity.setProgress(progress * 100);
if (progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// Handle the error
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
webView.loadUrl("http://www.windowcleaningforums.co.uk");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
//Add menu items, second value is the id, use this in the onOptionsItemSelected
menu.add(0,1, 0, "Back");
menu.add(0, 2, 0, "Forward");
menu.add(0, 3, 0, "Refresh");
//--> Here you have finished configuring the menu
return true;
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
// -->This is called when you select/tap a menu item (look at the method name)
switch (item.getItemId()){
//If the ID equals 1 , go back
case 1:
webView.goBack();
// --> Hence this happens _after_ you have tapped on the back menu item
item.setIcon(R.drawable.back);
return true;
//If the ID equals 2 , go forward
case 2 :
webView.goForward();
item.setIcon(R.drawable.forward);
return true;
//If the ID equals 3 , go back
case 3:
webView.reload();
item.setIcon(R.drawable.refresh);
return true;
}
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
As SilentMobius' comments pointout, you need to set your icons in the onCreateOptionsMenu, not the onOptionsItemSelected.
That's why they are only showing when you select the button.
Ah great thanks i figured it, didn't want to be given correct code just you giving the correct info to sort my self is good i know these are most likely simple things but nobody learns unless they ask questions thanks again.
Check my apps out in the market Luvdroid and window cleaning forums
Would you mind sharing your back, forward and refresh icons with me? I'm looking for something very clean and standardized for use on 12 webview apps for the some of the local municipalities.
SilentMobius said:
Comments below (marked -->), I'm not going to give you the answer, you need to understand why more that how.
Code:
package com.windowcleaningforums;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class windowcleaningforums extends Activity {
final Activity activity = this;
//DECLARE webview variable outside of onCreate function so we can access it in other functions (menu)
public WebView webView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.WebView);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setTitle(" Loading...");
activity.setProgress(progress * 100);
if (progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// Handle the error
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
webView.loadUrl("m.xxx.co.jp");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
//Add menu items, second value is the id, use this in the onOptionsItemSelected
menu.add(0,1, 0, "Back");
menu.add(0, 2, 0, "Forward");
menu.add(0, 3, 0, "Refresh");
//--> Here you have finished configuring the menu
return true;
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
// -->This is called when you select/tap a menu item (look at the method name)
switch (item.getItemId()){
//If the ID equals 1 , go back
case 1:
webView.goBack();
// --> Hence this happens _after_ you have tapped on the back menu item
item.setIcon(R.drawable.back);
return true;
//If the ID equals 2 , go forward
case 2 :
webView.goForward();
item.setIcon(R.drawable.forward);
return true;
//If the ID equals 3 , go back
case 3:
webView.reload();
item.setIcon(R.drawable.refresh);
return true;
}
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
Click to expand...
Click to collapse
I am working on an android application that modifies an external MySQL database. I know I can use an intermediate PHP/JSON service to do it, but I rather use JBDC because connection is faster and my project teachers want me to do it this way.
As it's my first app, I started with a simple button and an action(create a database), which actually works (in fact two buttons, the first one doesn't work on skd higher than 9, AsyncTask has to be used in them):
Code:
package com.example.prova;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.SystemClock;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.sql.*;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button1 = (Button) findViewById(R.id.btconn1);
final Button button2 = (Button) findViewById(R.id.btconn2);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try
{
String URL = "jdbc:mysql://" + "192.168.1.200" + ":" + "3306";
String USER = "app";
String PASS = "android";
Toast.makeText(getApplicationContext(),
"Conectando a servidor MySQL",
Toast.LENGTH_SHORT).show();
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection(URL, USER, PASS);
Toast.makeText(getApplicationContext(),
"Conectado Servidor MySQL",
Toast.LENGTH_LONG).show();
Statement stmt = conn.createStatement();
String SQL = "CREATE DATABASE SYNC";
stmt.executeUpdate(SQL);
conn.close();
}
catch (ClassNotFoundException e)
{
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
catch (SQLException e)
{
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new LED13ON().execute();
}
});
}
@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;
}
public class LED13ON extends AsyncTask<Void, Integer, Void> {
@Override
protected void onPostExecute(Void result){
SystemClock.sleep(2000);
}
@Override
protected void onPreExecute(){
SystemClock.sleep(2100);
}
@Override
protected void onProgressUpdate(Integer... values){
SystemClock.sleep(100);
}
@Override
protected Void doInBackground(Void... arg0){
try
{
String URL = "jdbc:mysql://" + "192.168.1.200" + ":" + "3306";
String USER = "app";
String PASS = "android";
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection(URL, USER, PASS);
Statement stmt = conn.createStatement();
String SQL = "CREATE DATABASE aSYNC";
stmt.executeUpdate(SQL);
conn.close();
}
catch (ClassNotFoundException e)
{
}
catch (SQLException e)
{
}
catch (Exception e)
{
}
return null;
}
}
}
The problem is when I try to use fragments, eclipse returns no errors but JDBC code is not working (logcat gives me no errors too). I know that's only the JDBC code which is not working because it gets inside the LED13ON and makes the SystemClock.sleep(2000), because the button is marked for two seconds. This is the code I have for the fragment in a new class:
Code:
package com.example.smarthome;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Locale;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.SystemClock;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
public class Fragment_main extends Fragment {
public Fragment_main() {
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main,container, false);
Button btn = (Button) rootView.findViewById(R.id.btconn1);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick (View v) {
new LED13ON().execute();
}
});
return rootView;
}
public class LED13ON extends AsyncTask<Void, Integer, Void> {
@Override
protected void onPostExecute(Void result){
SystemClock.sleep(2000);
}
@Override
protected void onPreExecute(){
SystemClock.sleep(2100);
}
@Override
protected void onProgressUpdate(Integer... values){
SystemClock.sleep(100);
}
@Override
protected Void doInBackground(Void... arg0){
try
{
String URL = "jdbc:mysql://" + "192.168.1.200" + ":" + "3306";
String USER = "app";
String PASS = "android";
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection(URL, USER, PASS);
Statement stmt = conn.createStatement();
String SQL = "CREATE DATABASE aSYNC";
stmt.executeUpdate(SQL);
conn.close();
}
catch (ClassNotFoundException e)
{
}
catch (SQLException e)
{
}
catch (Exception e)
{
}
return null;
}
}
}
So I don't understand why being the same code it's not working for the second app, having changed the setOnClickListener to work in the fragment. Can anyone help me? I would really like to use the swipe views for my app as I think it fits more the android Holo style.
Thank you for your time!
EDIT:
I found the solution to my problem:
I logged the exceptions, it gave me the error:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
Click to expand...
Click to collapse
The solution was to add newInstance in the Class.forName:
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
Click to expand...
Click to collapse
So that's all, now my app is working as I intended. Thanks for everything!
I have coded this android app which produces a listView containing songs which are streamed from the internet, and the user can play them by clicking them using the mediaPlayer.
What i am having trouble with is allowing the user to add a song to the arrayList that populates the ListView within MainActivity.java. I have used the settings page to add textboxes so the user can add their songs by inputting, Song Name, Artist and the Direct Link to the song. Though the code i have used for this doesn't work, it should add the Song Name, Artist and Direct Link into the array_list_music ArrayList, then update the ListView, or at least i think that is how it should be done, although after entering details and clicking the 'Add Song' button, and returning to the main page, the ListView does not that the newly added song.
I have shown my code below.
So if someone could help with this problem, that would be great, thanks.
MainActivity.java
Code:
package com.groupassignment.musicplayer;
import java.util.ArrayList;
import android.app.ListActivity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.MediaController;
import android.widget.Toast;
public class MainActivity extends ListActivity implements OnPreparedListener, MediaController.MediaPlayerControl {
private static final String TAG = "AudioPlayer";
private ListView list;
public MainArrayAdapter adapter;
private MediaPlayer mediaPlayer;
private MediaController mediaController;
private String audioFile;
private Handler handler = new Handler();
ArrayList<String> array_list_music = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = getListView();
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnPreparedListener(this);
mediaController = new MediaController(this);
//ArrayList<String> array_list_music = new ArrayList<String>();
//Used to add a song to the array list
array_list_music
.add("Jar of Hearts"
+ " ### "
+ "Christina Perri"
+ " ### "
+ "LINK");
array_list_music
.add("Save The World"
+ " ### "
+ "Swedish House Mafia feat. John Martin"
+ " ### "
+ "LINK");
array_list_music
.add("Bromance"
+ " ### "
+ "Avicii"
+ " ### "
+ "LINK");
adapter = new MainArrayAdapter(MainActivity.this, array_list_music);
setListAdapter(adapter);
//used to display toast and to play song using the URL, when clicking on a song
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
Object item = getListView().getItemAtPosition(arg2);
String the_list_item = item.toString();
Toast.makeText(MainActivity.this, "You are now listening to: " + the_list_item, Toast.LENGTH_LONG).show();
String[] aux = the_list_item.split(" ### ");
String url_to_play = aux[2];
playAudio(url_to_play);//sends url from arraylist item to the playAudio method
}
});
}
//used to play audio using the android mediaPlayer
private void playAudio(String url_to_play) {
//stop & reset player
try {
mediaPlayer.stop();
mediaPlayer.reset();
} catch (Exception e) {
}
//set the url, prepare it, and then play it
try {
mediaPlayer.setDataSource(url_to_play);
mediaPlayer.prepare();
mediaPlayer.start();
} catch (Exception e) {
Log.e(TAG, "Could not open file " + url_to_play + ".", e);
}
}
@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;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
Intent i_settings = new Intent(MainActivity.this, SettingsActivity.class);
startActivity(i_settings);
break;
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
mediaController.show();
return false;
}
//used to hide media controller, stop the media player and to release the url.
@Override
protected void onStop() {
super.onStop();
mediaController.hide();
mediaPlayer.stop();
mediaPlayer.release();
}
@Override
public boolean canPause() {
return true;
}
@Override
public boolean canSeekBackward() {
return true;
}
@Override
public boolean canSeekForward() {
return true;
}
@Override
public int getBufferPercentage() {
return 0;
}
@Override
public int getCurrentPosition() {
return mediaPlayer.getCurrentPosition();
}
@Override
public int getDuration() {
return mediaPlayer.getDuration();
}
@Override
public boolean isPlaying() {
return mediaPlayer.isPlaying();
}
@Override
public void pause() {
mediaPlayer.pause();
}
@Override
public void seekTo(int arg0) {
mediaPlayer.seekTo(arg0);
}
@Override
public void start() {
mediaPlayer.start();
}
public void onPrepared(MediaPlayer mediaPlayer) {
Log.d(TAG, "onPrepared");
mediaController.setMediaPlayer(this);
mediaController.setAnchorView(list);
handler.post(new Runnable() {
public void run() {
mediaController.setEnabled(true);
mediaController.show();
}
});
}
//------- what can you do from here -------
// implement your own media player with buttons since this one is not behaving "smart"..
// make next,previous buttons
// highlight the list item on click
// add your own server for playing music
// anything you want :)
}
MainArrayAdapter.java
Code:
package com.groupassignment.musicplayer;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import android.content.Context;
import android.database.DataSetObserver;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.TextView;
import com.groupassignment.musicplayer.R;
public class MainArrayAdapter extends ArrayAdapter<String> implements ListAdapter {
private final Context context;
private ArrayList<String> data_array;
private List<DataSetObserver> observers = new LinkedList<DataSetObserver>();
public MainArrayAdapter(Context context, ArrayList<String> list_of_ids) {
super(context, R.layout.main_list_rowlayout, list_of_ids);
this.context = context;
this.data_array = list_of_ids;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.main_list_rowlayout, parent,
false);
TextView textView_main_row_song_name = (TextView) rowView
.findViewById(R.id.textView_main_row_song_name);
TextView textView_main_row_singer_name = (TextView) rowView
.findViewById(R.id.textView_main_row_singer_name);
try {
String[] aux = data_array.get(position).split(" ### ");
String song_name = aux[0];
String artist = aux[1];
String url = aux[2];
textView_main_row_song_name.setText(song_name);
textView_main_row_singer_name.setText(artist);
} catch (Exception e) {
// TODO: handle exception
}
return rowView;
}
public void setArray(ArrayList<String> data_array){
this.data_array = data_array;
for (DataSetObserver observer : observers){
observer.onChanged();
}
}
@Override
public void registerDataSetObserver(DataSetObserver dataSetObserver) {
((LinkedList) observers).addFirst(dataSetObserver);
}
@Override
public void unregisterDataSetObserver(DataSetObserver dataSetObserver) {
observers.remove(dataSetObserver);
}
}
SettingsActivity.java
Code:
package com.groupassignment.musicplayer;
import android.app.Activity;
import android.view.View;
import android.widget.EditText;
import com.groupassignment.musicplayer.R;
public class SettingsActivity extends Activity {
public String str ="";
String songName;
String artist;
String directLink;
protected void onCreate(android.os.Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
songName = ((EditText)findViewById(R.id.editTextSongName)).toString();
artist = ((EditText)findViewById(R.id.editTextArtist)).toString();
directLink = ((EditText)findViewById(R.id.editTextDirectLink)).toString();
};
public void buttonAddSongClicked(View v)
{
addSong(songName, artist, directLink);
}
private void addSong(String artist, String songName, String directLink)
{
MainActivity main = new MainActivity();
main.array_list_music
.add( songName
+ " ### "
+ artist
+ " ### "
+ directLink);
main.adapter.notifyDataSetChanged();
main.adapter = new MainArrayAdapter(main, main.array_list_music);
}
}
The problem is that you create new instances of adapter each time, instead of updating the existing one. Easy way to solve your problem is to change attributes of array_list_music and adapter to public static in your MainActivity and modify addSong inside SettingsActivity to:
Code:
private void addSong(String artist, String songName, String directLink)
{
MainActivity.array_list_music
.add( songName
+ " ### "
+ artist
+ " ### "
+ directLink);
MainActivity.adapter.notifyDataSetChanged();
}
Hi there
I am new to this forum as an User, and I am also new to Java and Android, in developing ways. Sorry if there are any language or other mistakes.
So I am trying to make an app for a 'final' school project, which has the follow use:
The user sees an picture, a 'next' (and a 'finish') button. there are 11 pictures (user only sees one)(in the code there are for testing purposes only 3) when the user clicks 'next', the pic no. 2 appears, if he clicks another time next, the pictuer no. 3 appears and so on. (If he clicks finish, he should see a messages which shows him the text: "you've made it until pic xy" but i'm not so far yet.) I tried to do it with this code, but i failed.
Code:
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class VisusActivity extends Activity implements OnClickListener {
ImageView testanzeige;
Button next;
Integer[] bildanzeige = {
R.drawable.visustest,
R.drawable.v2,
R.drawable.v3
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_visus);
testanzeige = (ImageView)findViewById(R.id.testanzeige);
next = (Button)findViewById(R.id.next);
next.setOnClickListener(this);
next.setOnClickListener(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.visus, 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);
}
@Override
public void onClick(View v) {
try {
//Toast.makeText(this, getResources().getDisplayMetrics().toString(), Toast.LENGTH_LONG).show();
testanzeige.setImageResource(bildanzeige[0]);
}catch(Exception e){
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
};
public void onClick1(View v) {
try {
//Toast.makeText(this, getResources().getDisplayMetrics().toString(), Toast.LENGTH_LONG).show();
testanzeige.setImageResource(bildanzeige[2]);
}catch(Exception e){
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
}
}
so what have I to do? no tutorial shows up exactly my problem ( I think it's such a basic thing everyone can do it^^)
thx
rodentooth
Anser
rodentooth said:
Hi there
I am new to this forum as an User, and I am also new to Java and Android, in developing ways. Sorry if there are any language or other mistakes.
So I am trying to make an app for a 'final' school project, which has the follow use:
The user sees an picture, a 'next' (and a 'finish') button. there are 11 pictures (user only sees one)(in the code there are for testing purposes only 3) when the user clicks 'next', the pic no. 2 appears, if he clicks another time next, the pictuer no. 3 appears and so on. (If he clicks finish, he should see a messages which shows him the text: "you've made it until pic xy" but i'm not so far yet.) I tried to do it with this code, but i failed.
Code:
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class VisusActivity extends Activity implements OnClickListener {
ImageView testanzeige;
Button next;
Integer[] bildanzeige = {
R.drawable.visustest,
R.drawable.v2,
R.drawable.v3
};
[user=439709]@override[/user]
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_visus);
testanzeige = (ImageView)findViewById(R.id.testanzeige);
next = (Button)findViewById(R.id.next);
next.setOnClickListener(this);
next.setOnClickListener(this);
}
[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.visus, menu);
return true;
}
[user=439709]@override[/user]
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);
}
[user=439709]@override[/user]
public void onClick(View v) {
try {
//Toast.makeText(this, getResources().getDisplayMetrics().toString(), Toast.LENGTH_LONG).show();
testanzeige.setImageResource(bildanzeige[0]);
}catch(Exception e){
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
};
public void onClick1(View v) {
try {
//Toast.makeText(this, getResources().getDisplayMetrics().toString(), Toast.LENGTH_LONG).show();
testanzeige.setImageResource(bildanzeige[2]);
}catch(Exception e){
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
}
}
so what have I to do? no tutorial shows up exactly my problem ( I think it's such a basic thing everyone can do it^^)
thx
rodentooth
Click to expand...
Click to collapse
I have Make Fresh Java That will help You
Java
Code:
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
/**
* @author AndroidFire
*/
public class JumperPic extends Activity {
Button Nexty;
ImageView Imagey;
int i = 0;
[user=439709]@override[/user]
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.jumper);
Nexty = (Button)findViewById(R.id.nextey);
Imagey = (ImageView)findViewById(R.id.imagey);
Nexty.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View arg0) {
i++;
// To Set Your 1 Image Do it Thorough Layout
if (i == 1 ) {
//Your 2 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 2) {
//Your 3 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 3) {
//Your 4 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 4) {
// Your 5 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 5 ) {
//Your 6 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 6) {
//Your 7 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 7 ) {
//Your 8 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 8 ) {
//Your 9 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 9) {
//Your 10 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 10) {
//Image 11 Image
Nexty.setText("Finish");
Toast.makeText(getApplicationContext(), "Your Final Text", Toast.LENGTH_LONG).show();
}
}
});
}
}
Layout
Code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imagey"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/avatar_default_1" />
<Button
android:id="@+id/nextey"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
In Your Java You can use Button.setOnClickLiestner(new View.OnClickLiestner It will bit easier than it because When We Implement Anything in Your Class we need delcare methods @override somethings you can use int to change Image
In My Java I have int values that will change every click on Button according to values it will change imageview you have write java that is tough from Me you can use my one it will bit easier Ok
Thank you new problem
Thank you so very much AndroidFire withoup you i've wouldn't made it this far. So you say I can use your code (with your name in it) in my Project?
AndroidFire said:
you can use my one it will bit easier Ok
Click to expand...
Click to collapse
Now while this problem is solved another problem has come up.
As I told you in my first thread, there is a finish button. It has this use:
when user clicks next 2 times (so if he made it until the 3rd picture) and then clicks finish, he'll Return to the main activity, and instead of the text 'Klicke auf start um zu beginnen' (click on start to begin) the text 'you made it until the 3rd picture' should show up.
If he clicked Next 5 times (6th picture) and clicks finish, he also returns to the main activity, but the text is 'you made it until the 5th picture'.
And so on with the others.
now i dont know, how to implement multiple buttons, how can I learn that? also how did you learn to code, AndroidFire? It's such a masterpiece *-*
I've tried this, but I failed.
the red lines are those, which I made at my own but they unfortunately don't work
Java Main Activity
Code:
package ch.OptiLab.visustest;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener {
Button btn1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button) findViewById(R.id.buttonSTART);
btn1.setOnClickListener(this);
[COLOR="red"] Intent intent = getIntent();
if( intent != null)
String inhalt = intent.GetStringExtra("0.1");[/COLOR]
}
@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);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(this,VisusActivity.class));
}
}
XML Main Activity
Code:
<RelativeLayout xmlns:android="(external link)"
xmlns:tools="(external link)"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="ch.OptiLab.visustest.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="@string/Text1"
android:id="@+id/textView"
android:layout_marginTop="84dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:gravity="center_horizontal"
android:singleLine="false" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/Text2"
android:id="@+id/textView2"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="33dp" />
<Button
android:id="@+id/buttonSTART"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="@string/button1"
android:layout_below="@+id/textView"
android:layout_centerHorizontal="true"
android:layout_marginTop="142dp" />
</RelativeLayout>
Java 2nd activity
Code:
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
/**
* @author AndroidFire
*/
public class VisusActivity extends Activity {
Button next;
ImageView testanzeige;
Button finish;
int i = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_visus);
next = (Button)findViewById(R.id.next);
testanzeige = (ImageView)findViewById(R.id.testanzeige);
[COLOR="red"]finish = (Button)findViewById(R.id.finish);[/COLOR]
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
i++;
// To Set Your 1 Image Do it Thorough Layout
if (i == 1 ) {
//Your 2 Image
testanzeige.setImageResource(R.drawable.visustest);
[COLOR="Red"]finish.setOnClickListener(new View.OnClickListener() {
Intent i = new Intent(this, MainActivity.class);
String content = "You made it until 2nd picture".toString();
i.putExtra("0.1", content);
}
[/COLOR]
}
else if (i == 2) {
//Your 3 Image
testanzeige.setImageResource(R.drawable.v2);
}
else if (i == 3) {
//Your 4 Image
testanzeige.setImageResource(R.drawable.v3);
}
else if (i == 4) {
// Your 5 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 5 ) {
//Your 6 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 6) {
//Your 7 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 7 ) {
//Your 8 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 8 ) {
//Your 9 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 9) {
//Your 10 Image
testanzeige.setImageResource(R.drawable.visustest);
}
else if (i == 10) {
//Image 11 Image
next.setText("Finish");
Toast.makeText(getApplicationContext(), "Your Final Text", Toast.LENGTH_LONG).show();
}
}
});
}
}
XML 2nd Activity
Code:
<RelativeLayout xmlns:android="(external link)"
(external link)"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="ch.OptiLab.visustest.VisusActivity" >
<ImageView
android:id="@+id/testanzeige"
android:layout_width="231dp"
android:layout_height="231dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="@drawable/v2" />
<Button
android:id="@+id/next"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="16dp"
android:text="@string/NEXTPIC" />
<Button
android:id="@+id/finish"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/next"
android:layout_alignBottom="@+id/next"
android:layout_alignParentLeft="true"
android:text="@string/cantread" />
</RelativeLayout>
The most important strings:
Code:
<string name="Text1">Klicke auf Start um zu beginnen.</string>
<string name="cantread">finish</string>
Thank you so much
other way also not work
Well I have tried another solution, but it didn't work either. What do I have to do?
Code:
Code:
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
/**
* [user=736105]@author[/user] AndroidFire
*/
public class VisusActivity extends Activity {
Button next;
ImageView testanzeige;
Button finish;
int i = 0;
[user=439709]@override[/user]
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_visus);
next = (Button)findViewById(R.id.next);
testanzeige = (ImageView)findViewById(R.id.testanzeige);
finish = (Button)findViewById(R.id.finish);
next.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View arg0) {
i++;
// To Set Your 1 Image Do it Thorough Layout
if (i == 1 ) {
//Your 2 Image
testanzeige.setImageResource(R.drawable.visustest);
}
else if (i == 2) {
//Your 3 Image
testanzeige.setImageResource(R.drawable.v2);
}
else if (i == 3) {
//Your 4 Image
testanzeige.setImageResource(R.drawable.v3);
}
else if (i == 4) {
// Your 5 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 5 ) {
//Your 6 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 6) {
//Your 7 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 7 ) {
//Your 8 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 8 ) {
//Your 9 Image
//Imagey.setImageResource(R.drawable.Your Image);
}
else if (i == 9) {
//Your 10 Image
testanzeige.setImageResource(R.drawable.visustest);
}
else if (i == 10) {
//Image 11 Image
next.setText("Finish");
Toast.makeText(getApplicationContext(), "Your Final Text", Toast.LENGTH_LONG).show();
}
}
});
[COLOR="Red"]finish.setOnClickListener(new View.OnClickListener() {
Intent i = new Intent(this, MainActivity.class);
[user=439709]@override[/user]
public void onClick(View arg0) {
i++;
if (i == 1 ) {
String content = "You got 0.1".toString();
i.putExtra("0.1", content);
[/COLOR]
}
}
}
}
I'm assuming you declared your activity in the Manifest?
F'n noob said:
I'm assuming you declared your activity in the Manifest?
Click to expand...
Click to collapse
uhm I think so.
Edit: there are 2 activity-groups in my manifest, so I think they've been declared automatically?
After looking at your code further, you are using onClick methods but aren't implenting an onClickListener. Are your buttons working at all?
yes, they are working fine. I just dont know how to change the text.
rodentooth said:
yes, they are working fine. I just dont know how to change the text.
Click to expand...
Click to collapse
There are two ways I can think of to solve this one.
The first is to create an Application class, declare that in the manifest, and add a variable in there to save how many images have been seen. Just set it in the one activity and in the other read it, and if it's 0, show the start message, and if it's greater than 0 show the message you want.
The cooler way is to use startActivityForResult to go to the picture viewing activity. The picture viewing activity keeps track of how many the user saw and then, when they leave:
Code:
Intent returnData = new Intent();
returnData.putExtra("PICTURES_SEEN", count);
setResult(RESULT_OK, returnData);
Then, in the first activity:
Code:
@Override
protected void onActivityResult (int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
int picturesSeen = data.getExtra("PICTURES_SEEN");
// do stuff
}
}
Hopefully that's helpful.
(There's a page in Google's API called "Getting a Result from an Activity" but I can't link to it because I'm a spammernew.)
Hello,
So I am new to Java programming and I want to develop a small and simple app for plant identification. But the app crashes when I call a function wich set the text of a TextView. It happens in the OnCreate when I switch to a second activity. I tried to call the method with only comments in it. It also works when I create a new instance of the MainActivity class. It crashes when I try to set the text of a TextView from the MainActivity layout. It is probably a simple and basic problem, but I've been searching for my error for hours now and I still can't get it. I want to understand what's wrong and move on the the next step
I use the layout of MainActivity in Morphe activity.
Code:
package com.gobtron.cleidfougeres;
import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class Morphe extends MainActivity {
TextView MorphTextTop;
TextView LongFrondeTextTop;
TextView FormeLimbeTextTop;
TextView DisposFrondeTextTop;
TextView DescTextTop;
TextView EspeceTextTop;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TopText topText = new TopText();
topText.SetText();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_morphe, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
And this is the code for the method in TopText method (located in TopText.java)
Code:
public class TopText {
public void SetText() {
MainActivity mainac = new MainActivity();
mainac.MorphTextTop.setText("eeeee");
}
}
gobtron said:
Hello,
So I am new to Java programming and I want to develop a small and simple app for plant identification. But the app crashes when I call a function wich set the text of a TextView. It happens in the OnCreate when I switch to a second activity. I tried to call the method with only comments in it. It also works when I create a new instance of the MainActivity class. It crashes when I try to set the text of a TextView from the MainActivity layout. It is probably a simple and basic problem, but I've been searching for my error for hours now and I still can't get it. I want to understand what's wrong and move on the the next step
I use the layout of MainActivity in Morphe activity.
Code:
package com.gobtron.cleidfougeres;
import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class Morphe extends MainActivity {
TextView MorphTextTop;
TextView LongFrondeTextTop;
TextView FormeLimbeTextTop;
TextView DisposFrondeTextTop;
TextView DescTextTop;
TextView EspeceTextTop;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TopText topText = new TopText();
topText.SetText();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_morphe, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
And this is the code for the method in TopText method (located in TopText.java)
Code:
public class TopText {
public void SetText() {
MainActivity mainac = new MainActivity();
mainac.MorphTextTop.setText("eeeee");
}
}
Click to expand...
Click to collapse
Though you haven't posted a stack trace but I'm pretty sure a NullPointerException is being thrown in your code and this is because
Code:
public class TopText {
public void SetText() {
MainActivity mainac = new MainActivity();
mainac.MorphTextTop.setText("eeeee");
}
}
Is creating a new instance of Activity class MainActivity in which the field "MorphTextTop" is not initialized.......
All the fields in your main activity must be initialized in the onCreate method of the Activity after you have called " setContentView(R.layout.activity_main);"
The initialization would look something like
Code:
MorphTextTop = (TextView) findViewById(R.id."THIS_VIEWS_ID");
put your activity_main.xml here if you then I could give you the complete code.
What does your log say after the app crashes? And where's your actual MainActivity class?
Ok I finally found out the problem. Turns out that I was creating an instance of the TextView before setting the ContentView. Yay!