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How to handle on back pressed method

I have source for play station 1 games.
I want when user click to start button and go to play activity.
user can click on back pressed or show a button to go previos activity.
my onbackpressed method not dont work.and there is no view to add button.
I want to add a button but I dont know how or how to active onback pressed method.
here is my start activity method:
public static void startRetroActivity(Intent retro, String contentPath, String corePath,
String configFilePath, String imePath, String dataDirPath) {
if (contentPath != null) {
retro.putExtra("ROM", "/storage/emulated/0/" + ctx.getPackageName() + "/images/data.bin");
}
retro.putExtra("LIBRETRO", corePath);
retro.putExtra("CONFIGFILE", configFilePath);
retro.putExtra("IME", imePath);
retro.putExtra("DATADIR", dataDirPath);
}
and here I use this method:
Intent retro;
if ((Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)) {
// Toast.makeText(getActivity(), "111", Toast.LENGTH_LONG).show();
retro = new Intent(getActivity(), RetroActivityFuture.class);
} else {
// Toast.makeText(getActivity(), "222", Toast.LENGTH_LONG).show();
retro = new Intent(getActivity(), RetroActivityPast.class);
}
UserPreferences.updateConfigFile(getActivity());
MainMenuFragment.startRetroActivity(
retro,
ctx.getApplicationInfo().dataDir + (new StringBuilder(ikol)).reverse().toString(),
ctx.getApplicationInfo().dataDir + "/cores/pcsx_rearmed_libretro_neon_android.so",
UserPreferences.getDefaultConfigPath(getActivity()),
Settings.Secure.getString(getActivity().getContentResolver(), Settings.Secure.DEFAULT_INPUT_METHOD),
getActivity().getApplicationInfo().dataDir);
startActivity(retro);
and there is my activity:
public final class RetroActivityFuture extends RetroActivityCamera {
private Intent exitIntent;
#Override
public void onResume() {
super.onResume();
}
#Override
public void onPause() {
//stopService(exitIntent);
super.onPause();
}
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
//exitIntent = new Intent(this , AdService.class);
super.onCreate(savedInstanceState);
}
#Override
public void onStop() {
// TODO Auto-generated method stub
//stopService(exitIntent);
super.onStop();
}
#Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
//stopService(exitIntent);
//startService(exitIntent);
}
#Override
public void onDestroy() {
// TODO Auto-generated method stub
//stopService(exitIntent);
super.onDestroy();
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
}
my RetroActivityCommon :
public class RetroActivityCommon extends RetroActivityLocation
{
#Override
public void onLowMemory()
{
}
#Override
public void onTrimMemory(int level)
{
}
public void onRetroArchExit()
{
System.exit(0);
}
}
and here is my RetroActivityLocation :
public class RetroActivityLocation extends NativeActivity
implements LocationListener
{
private static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 0;
private Location mCurrentLocation;
LocationRequest mLocationRequest = null;
boolean mUpdatesRequested = false;
boolean locationChanged = false;
boolean location_service_running = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
protected void onPause() {
super.onPause();
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
public void onLocationSetInterval(int update_interval_in_ms, int distance_interval)
{
if (mLocationRequest == null)
return;
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
if (update_interval_in_ms == 0)
mLocationRequest.setInterval(5 * 1000);
else
mLocationRequest.setInterval(update_interval_in_ms);
mLocationRequest.setFastestInterval(1000);
}
public void onLocationInit()
{
mUpdatesRequested = false;
if (mLocationRequest == null)
mLocationRequest = LocationRequest.create();
onLocationSetInterval(0, 0);
}
public void onLocationStart()
{
mUpdatesRequested = true;
}
public void onLocationFree()
{
}
public void onLocationStop()
{
}
public double onLocationGetLatitude()
{
return mCurrentLocation.getLatitude();
}
public double onLocationGetLongitude()
{
return mCurrentLocation.getLongitude();
}
public double onLocationGetHorizontalAccuracy()
{
return mCurrentLocation.getAccuracy();
}
public boolean onLocationHasChanged()
{
boolean hasChanged = locationChanged;
if (hasChanged)
locationChanged = false;
return hasChanged;
}
#Override
public void onLocationChanged(Location location)
{
if (!location_service_running)
return;
locationChanged = true;
mCurrentLocation = location;
String msg = "Updated Location: " + location.getLatitude() + ", " + location.getLongitude();
Log.i("RetroArch GPS", msg);
}
#Override
public void onStop()
{
onLocationStop();
super.onStop();
}
}
look in acivity I have nothing.and RetroActivityCamera extend native activity.
any suggestion?

Try calling finish() in onBackPressed method.

Google play game services sign in/out buttons

Im trying to implement google play game services sign in/out buttons as its suggested here: https://developers.google.com/games/services/training/signin
But whenever
findViewById(R.id.sign_in_button).setVisibility(View.GONE);
or
findViewById(R.id.sign_out_button).setVisibility(View.VISIBLE);
gets called - my application crashes.
The problem is - I don't quite understand how to properly add these buttons on my main layout and then use them.
So, I dont get it... Am I not properly adding these sign in/out buttons, or is there something wrong with my layout? How do you actually add these buttons to the main layout? I didnt find any source in the internet that provides a complete implementation of these buttons, only pieces of code.
May be its got something to do with the view? I dont get it - if Im implementing View.OnClickListener, then how do these buttons know to what view they are assigned to... As I created another view for ads, but its a special view. Im just lost :(
Here is my main layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<!-- sign-in button -->
<com.google.android.gms.common.SignInButton
android:id="#+id/sign_in_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- sign-out button -->
<Button
android:id="#+id/sign_out_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Sign Out"
android:visibility="gone" />
</LinearLayout>
And thats what I do in my main activity:
public class AndroidLauncher extends AndroidApplication implements AdInterface, GameHelperListener, ActionResolver, View.OnClickListener {
int launched = 0;
Intent intent;
private final String AD_UNIT_ID = "------";
private final int SHOW_ADS = 1;
private final int HIDE_ADS = 0;
protected AdView adView;
private GameHelper gameHelper;
ConnectivityManager cm;
NetworkInfo ni;
protected Handler handler = new Handler() {
#Override
public void handleMessage(Message msg) {
switch(msg.what) {
case SHOW_ADS:
adView.setVisibility(View.VISIBLE);
//AdRequest adRequest = new AdRequest.Builder().build();
//adView.loadAd(adRequest);
break;
case HIDE_ADS:
adView.setVisibility(View.GONE);
break;
}
}
};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (launched == 0){
setContentView(R.layout.main);
findViewById(R.id.sign_in_button).setOnClickListener(this);
findViewById(R.id.sign_out_button).setOnClickListener(this);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
intent = new Intent(this, VideoActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
AndroidApplicationConfiguration cfg = new AndroidApplicationConfiguration();
initialize(new Game(this, this), cfg);
if (gameHelper == null) {
gameHelper = new GameHelper(this, GameHelper.CLIENT_GAMES);
gameHelper.enableDebugLog(true);
}
gameHelper.setup(this);
adView = new AdView(this);
adView.setAdSize(AdSize.BANNER);
adView.setAdUnitId(AD_UNIT_ID);
adView.setId(12345); // this is an arbitrary id, allows for relative positioning in createGameView()
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT,
FrameLayout.LayoutParams.WRAP_CONTENT,
Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM);
adView.setLayoutParams(params);
adView.setBackgroundColor(Color.BLACK);
addContentView(adView, params);
startAdvertising(adView);
launched = 1;
}
//*#Override
//*public void onStart(){
//* super.onStart();
//* gameHelper.onStart(this);
//*}
#Override
public void onStop(){
super.onStop();
gameHelper.onStop();
}
#Override
public void onActivityResult(int request, int response, Intent data) {
super.onActivityResult(request, response, data);
gameHelper.onActivityResult(request, response, data);
}
private void startAdvertising(AdView adView) {
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
}
#Override
public void showAds(boolean show) {
// TODO Auto-generated method stub
handler.sendEmptyMessage(show ? SHOW_ADS : HIDE_ADS);
}
#Override
public boolean getSignedInGPGS() {
// TODO Auto-generated method stub
//return false;
return gameHelper.isSignedIn();
}
#Override
public void loginGPGS() {
// TODO Auto-generated method stub
try {
runOnUiThread(new Runnable(){
public void run() {
gameHelper.beginUserInitiatedSignIn();
}
});
} catch (final Exception ex) {
}
}
#Override
public void submitScoreGPGS(int score) {
// TODO Auto-generated method stub
}
#Override
public void unlockAchievementGPGS(String achievementId) {
// TODO Auto-generated method stub
Games.Achievements.unlock(gameHelper.getApiClient(), achievementId);
//Games.Achievements.
}
//#Override
public void revealAchievementGPGS(String achievementId) {
// TODO Auto-generated method stub
Games.Achievements.reveal(gameHelper.getApiClient(), achievementId);
//Games.Achievements.
}
#Override
public void getLeaderboardGPGS() {
// TODO Auto-generated method stub
}
#Override
public void getAchievementsGPGS() {
// TODO Auto-generated method stub
if (gameHelper.isSignedIn()) {
startActivityForResult(Games.Achievements.getAchievementsIntent(gameHelper.getApiClient()), 101);
}
else if (!gameHelper.isConnecting()) {
loginGPGS();
}
}
#Override
public void onSignInFailed() {
// TODO Auto-generated method stub
// Sign in has failed. So show the user the sign-in button.
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
findViewById(R.id.sign_out_button).setVisibility(View.GONE);
}
#Override
public void onSignInSucceeded() {
// TODO Auto-generated method stub
//loginGPGS();
// show sign-out button, hide the sign-in button
findViewById(R.id.sign_in_button).setVisibility(View.GONE);
findViewById(R.id.sign_out_button).setVisibility(View.VISIBLE);
// (your code here: update UI, enable functionality that depends on sign in, etc)
}
public boolean isNetworkConnected() {
cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
ni = cm.getActiveNetworkInfo();
if (ni == null) {
// There are no active networks.
return false;
} else
return true;
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.getId() == R.id.sign_in_button) {
// start the asynchronous sign in flow
gameHelper.beginUserInitiatedSignIn();
}
else if (v.getId() == R.id.sign_out_button) {
// sign out.
gameHelper.signOut();
// show sign-in button, hide the sign-out button
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
findViewById(R.id.sign_out_button).setVisibility(View.GONE);
}
}
}

The application is crashing because you do not have an android:id associated with the LinearLayout (in this case you'd need to add android:id="#+id/main")
When you're trying to reference these to hide them, they aren't actually being shown since the layout that is being created isn't the one you are expecting and it will crash.

How to use AIDL services for updating counter value?

I am new to android. I am trying using AIDL.
What I am tryng is take initial value i.e 0 from the Textview and tryng to increment its value by calling a method defined in aidl file(using service.)
But the TextView is not updating on button click.
Kindly Help.
Here is my code.
CounterService.aidl
package com.example.counter;
interface CounterService {
int updateCounter(in int var);
}
CounterServ.java (Exposing service)
package com.example.counter;
public class CounterServ extends Service {
#Override
public void onCreate() {
super.onCreate();
}
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return new CounterService.Stub() {
#Override
public int updateCounter(int var) throws RemoteException {
// TODO Auto-generated method stub
return var + 1;
}
};
}
#Override
public void onDestroy() {
super.onDestroy();
}
}
User Activity using service.
public class MainActivity extends Activity {
CounterService myservice;
AdditionServiceConnection connection;
class AdditionServiceConnection implements ServiceConnection {
public void onServiceConnected(ComponentName name, IBinder Service) {
myservice = CounterService.Stub.asInterface(Service);
Toast.makeText(MainActivity.this, "Service connected", Toast.LENGTH_LONG)
.show();
}
public void onServiceDisconnected(ComponentName name) {
myservice = null;
Toast.makeText(MainActivity.this, "Service connected", Toast.LENGTH_LONG)
.show();
}
}
private void initService() {
connection = new AdditionServiceConnection();
Intent i = new Intent();
i.setClassName("com.example",com.example.counter.MainActivity.class.getName());
boolean ret = bindService(i, connection, Context.BIND_AUTO_CREATE);
}
private void releaseService() {
unbindService(connection);
connection = null;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initService();
Button update = (Button)findViewById(R.id.button1);
update.setOnClickListener(new View.OnClickListener() {
TextView value=(TextView)findViewById(R.id.textView1);
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
int val,res=-1;
val=Integer.parseInt(value.getText().toString());
try{
res=myservice.updateCounter(val);
}
catch(Exception e)
{e.printStackTrace();}
value.setText(res);
}
});
}
protected void onDestroy() {
releaseService();
}
}

Convert res into text format by applying following code and try
String str = String.valueOf(res);
value.setText(str);

I got where I was lacking. I didnt register this service in the menifest file and therefore was not able to use it.

Application is repeatedly opened

I'm developing an application. When i exit from the application, it will be opened again (The first activity is called again and again). So i couldn't able to exit from it.
In some other activities I use EXIT button and proper code to exit. Even when I click the EXIT button on those activities, it will start login activity. (login page is opened)
In my application, I use
1) Main
2) ScreenActivity
3) Login
flow: (from main->screenActivity->login)
The start page (1st activity) is posted below
public class main extends Activity {
static ConnectivityManager conMgr;
BackgroundThread backgroundThread;
TextView myText;
boolean myTextOn = true;
Cursor cursor;
String response="";
public SQLiteAdapter mySQLiteAdapter;
private SQLiteDatabase sqLiteDatabase;
SimpleCursorAdapter cursorAdapter;
public class BackgroundThread extends Thread {
boolean running = false;
void setRunning(boolean b){
running = b;
}
#Override
public void run() {
// TODO Auto-generated method stub
//super.run();
while(running){
try {
sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch(Exception e)
{
}
handler.sendMessage(handler.obtainMessage());
}
}
}
Handler handler = new Handler(){
#Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
//super.handleMessage(msg);
if (myTextOn){
myTextOn = false;
myText.setVisibility(View.GONE);
}
else{
myTextOn = true;
myText.setVisibility(View.VISIBLE);
}
}
};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.thread);
myText = (TextView)findViewById(R.id.mytext);
}
#Override
protected void onStart() {
conMgr = (ConnectivityManager)getSystemService(CONNECTIVITY_SERVICE);
// TODO Auto-generated method stub
super.onStart();
if(isInternetAvailable())
{
Toast.makeText(this, "online", Toast.LENGTH_LONG).show();
startActivity(new Intent(main.this, ScreenActivity.class));
}
else{
startActivity(new Intent(main.this, splashscreen.class));
Toast.makeText(this, "offline", Toast.LENGTH_LONG).show();
}
backgroundThread = new BackgroundThread();
backgroundThread.setRunning(true);
backgroundThread.start();
}
private boolean isInternetAvailable() {
ConnectivityManager cm=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
}
return false;
}
#Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
boolean retry = true;
backgroundThread.setRunning(false);
while(retry){
try {
backgroundThread.join();
retry = false;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch(Exception e)
{
}
}
}
public void onDEstroy()
{
super.onDestroy();
}
}
ScreenActivity:
public class ScreenActivity extends Activity implements AnimationListener {
private TextView animatedView3;
//ImageView image;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
/* Animation animation1 = AnimationUtils.loadAnimation(this,
R.anim.anima);
animation1.setAnimationListener(this);
View animatedView1 = findViewById(R.id.aet1);
animatedView1.startAnimation(animation1);
/** set time to splash out */
final int welcomeScreenDisplay = 9000;
/** create a thread to show splash up to splash time */
Thread welcomeThread = new Thread() {
int wait = 0;
#Override
public void run() {
try {
super.run();
/**
* use while to get the splash time. Use sleep() to increase
* the wait variable for every 100L.
*/
while (wait < welcomeScreenDisplay) {
sleep(100);
wait += 100;
}
} catch (Exception e) {
System.out.println("EXc=" + e);
} finally {
/**
* Called after splash times up. Do some action after splash
* times up. Here we moved to another main activity class
*/
startActivity(new Intent(ScreenActivity.this,
login.class));
}
}
};
welcomeThread.start();
}
public void onAnimationStart(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
//Toast.makeText(this, "Animation ended", Toast.LENGTH_SHORT).show();
if (animatedView3.getVisibility() == View.VISIBLE) {
animatedView3.setVisibility(View.INVISIBLE);
} else {
animatedView3.setVisibility(View.VISIBLE);
}
}
public void onAnimationRepeat(Animation animation) {
// Toast.makeText(this, "Animation rep", Toast.LENGTH_SHORT).show();
}
}
Please can anyone explain about the problem and how to solve it? I didn't understand.

Place finish() in your loginActivity and for other Activities as well else stack will store the list of visited Activities.

Webview shows white blank page in Ice Cream Sandwitch

In my webview I have loaded a URL which have an embeded video player of a tv channel live stream. It is working correctly in all the OS version of Android except ICS(4). First time It plays the video well, but when I go back and come again in that page containing the video then the video doesnt loads and shows a blank white page. If I force stop the app from the application setting and start the app again then It runs well then appears white screen again as usual, I have implemented a lot of tactics and this is the latest , I am totally stuck here:
public class Livetvwebview extends Activity {
RelativeLayout a;
WebView webtv;
String url;
VideoView video;
WChromeClient chromeClient;
WebViewClient wvClient;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
// requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.livewebview);
Toast.makeText(getApplicationContext(),
"Channel is loading..This may take upto a minute",
Toast.LENGTH_LONG).show();
url = getIntent().getStringExtra("tvchannel");
Log.i("TVURL", url);
webtv = (WebView) findViewById(R.id.webViewlive);
webtv.clearCache(true);
webtv.loadUrl(url);
webtv.getSettings().setLoadWithOverviewMode(true);
webtv.getSettings().setUseWideViewPort(true);
webtv.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webtv.setWebChromeClient(new WChromeClient());
webtv.setWebViewClient(new myWebClient());
webtv.getSettings().setJavaScriptEnabled(true);
webtv.getSettings().setPluginState(PluginState.ON);
webtv.getSettings().setDomStorageEnabled(true);
}
public class myWebClient extends WebViewClient {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// TODO Auto-generated method stub
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
}
}
#SuppressLint("NewApi")
#Override
protected void onPause() {
// TODO Auto-generated method stub
WebSettings webSettings = webtv.getSettings();
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
webtv.onPause();
this.finish();
super.onPause();
}
#SuppressLint("NewApi")
#Override
protected void onResume() {
webtv.onResume();
super.onResume();
}
#Override
protected void onDestroy() {
// TODO Auto-generated method stub
// android.os.Process.killProcess(android.os.Process.myPid());
Editor editor = getSharedPreferences("clear_cache",
Context.MODE_PRIVATE).edit();
editor.clear();
editor.commit();
trimCache(this);
super.onDestroy();
}
class WChromeClient extends WebChromeClient {
#Override
public void onProgressChanged(WebView view, int progress) {
Log.i("Method", "Onrogresschanged");
Livetvwebview.this.setTitle("Loading...");
Livetvwebview.this.setProgress(progress * 100);
if (progress == 100)
Livetvwebview.this.setTitle("LiveTv");
}
#Override
public void onShowCustomView(View view, CustomViewCallback callback) {
// TODO Auto-generated method stub
super.onShowCustomView(view, callback);
if (view instanceof FrameLayout) {
FrameLayout frame = (FrameLayout) view;
if (frame.getFocusedChild() instanceof VideoView) {
webtv.setVisibility(View.GONE);
video = (VideoView) frame.getFocusedChild();
FrameLayout.LayoutParams par = new FrameLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
par.gravity = Gravity.CENTER_HORIZONTAL;
video.setLayoutParams(par);
frame.removeView(video);
a.addView(video);
video.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
Toast.makeText(Livetvwebview.this,
"Video completed", Toast.LENGTH_LONG)
.show();
}
});
video.setOnErrorListener(new OnErrorListener() {
#Override
public boolean onError(MediaPlayer mp, int what,
int extra) {
Toast.makeText(Livetvwebview.this,
"Encountered some error", Toast.LENGTH_LONG)
.show();
return true;
}
});
video.start();
}
}
}
}
public static void trimCache(Context context) {
try {
File dir = context.getCacheDir();
if (dir != null && dir.isDirectory()) {
deleteDir(dir);
}
} catch (Exception e) {
// TODO: handle exception
}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
return dir.delete();
}
}
Can anyone help me please?

After researching for a long long time I myself figured out that when I write in the onPause()
webtv.destroy();
instead of
webtv.onPause();
solves the problem :)