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Arrêtez handler.postDelayed ()

J'appelle plusieurs gestionnaires par new Handler (). PostDelayed (new Runnable () ..... Comment puis-je l'arrêter si je clique sur le bouton de retour?

 public class Tag1 extends Oberklasse implements OnClickListener {

public Button btn;
//private Handler myHandler = new Handler();
Handler handler;
Runnable myRunnable;




@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tt1);
    //Bildschirm soll anbleiben!!!
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

    //Lautstärke BUttons enable
    setVolumeControlStream(AudioManager.STREAM_MUSIC);





    getActionBar().setTitle("Tag 1");
    getActionBar().setDisplayHomeAsUpEnabled(true); 


    //tt1.xml beschriften
    TextView textView = (TextView)findViewById(R.id.uebung1);
    textView.setText("Übung 1:");

    TextView textView2 = (TextView)findViewById(R.id.uebung2);
    textView2.setText("Übung 2:");

    TextView textView3 = (TextView)findViewById(R.id.uebung3);
    textView3.setText("Übung 3:");

    TextView textView4 = (TextView)findViewById(R.id.uebung4);
    textView4.setText("Übung 4:");

    TextView textView5 = (TextView)findViewById(R.id.uebung5);
    textView5.setText("Übung 5:");

    TextView textView6 = (TextView)findViewById(R.id.uebung6);
    textView6.setText("Übung 6:");

    TextView textView7 = (TextView)findViewById(R.id.uebung7);
    textView7.setText("Übung 7:");






    //Button finden und Initialisieren!
    btn = (Button) findViewById(R.id.trainingsstart);
    btn.setOnClickListener(this);

}

@Override
public void onClick(View v) {





    Crunch();

    Handler handler=  new Handler();
    Runnable myRunnable = new Runnable() {
    public void run() {
        UnterarmLiegestütz1();
    }
    };
    handler.postDelayed(myRunnable,3000);

}

@Override 
public void onBackPressed() { 
    super.onBackPressed();
    uebung.stop();
    handler.removeCallbacks(myRunnable);

}






}

J'ai le problème que mes gestionnaires n'ont pas un nom comme "myHandler". Comment puis-je le gérer? Merci pour l'aide!

Maintenant, j'ai ces erreurs:

03-28 17:47:03.662: E/AndroidRuntime(1961): FATAL EXCEPTION: main
03-28 17:47:03.662: E/AndroidRuntime(1961): Java.lang.NullPointerException
03-28 17:47:03.662: E/AndroidRuntime(1961):     at de.basti12354.tage.uebungen.Tag1.onBackPressed(Tag1.Java:120)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.app.Activity.onKeyUp(Activity.Java:2159)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.KeyEvent.dispatch(KeyEvent.Java:2647)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.app.Activity.dispatchKeyEvent(Activity.Java:2389)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at com.Android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.Java:1860)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.Java:3791)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.Java:3774)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.Java:3379)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.Java:3429)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.Java:3398)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.Java:3483)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.Java:3406)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.Java:3540)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.Java:3379)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.Java:3429)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.Java:3398)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.Java:3406)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.Java:3379)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.Java:3429)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.Java:3398)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.Java:3516)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.Java:3666)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.Java:1982)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.Java:1698)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.Java:1689)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.Java:1959)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.Java:141)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.os.MessageQueue.nativePollOnce(Native Method)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.os.MessageQueue.next(MessageQueue.Java:132)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.os.Looper.loop(Looper.Java:124)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Android.app.ActivityThread.main(ActivityThread.Java:5103)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Java.lang.reflect.Method.invokeNative(Native Method)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at Java.lang.reflect.Method.invoke(Method.Java:525)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at com.Android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.Java:737)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at com.Android.internal.os.ZygoteInit.main(ZygoteInit.Java:553)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at dalvik.system.NativeStart.main(Native Method)
androidhandlerandroid-handlerpostdelayed
88
basti12354

Vous pouvez utiliser:

 Handler handler = new Handler()
 handler.postDelayed(new Runnable())

Ou vous pouvez utiliser:

 handler.removeCallbacksAndMessages(null);

Docs

public final final removeCallbacksAndMessages (Jeton d'objet)

Ajoutée dans l'API niveau 1 Supprimez les publications en attente de rappels et les messages envoyés dont obj est un jeton. Si le jeton est nul, tous les rappels et les messages seront supprimés.

Ou vous pouvez aussi faire comme suit:

Handler handler=  new Handler()
Runnable myRunnable = new Runnable() {
public void run() {
    // do something
}
};
handler.postDelayed(myRunnable,zeit_dauer2);

Ensuite:

handler.removeCallbacks(myRunnable);

Docs

public final void removeCallbacks (Runnable r)

Ajoutée dans l'API niveau 1 Supprimez toutes les publications en attente de Runnable r se trouvant dans la file d'attente des messages.

public final void removeCallbacks (Runnable r, Jeton d'objet)

Edit:

Change ça:

@Override
public void onClick(View v) {
Crunch();
Handler handler=  new Handler();
Runnable myRunnable = new Runnable() {

À:

@Override
public void onClick(View v) {
Crunch();
handler=  new Handler();
myRunnable = new Runnable() { /* ... */}

Parce que tu as le dessous. Déclaré avant onCreate mais vous l'avez à nouveau déclaré, puis initialisé dans onClick pour aboutir à un NPE.

Handler handler; // declared before onCreate
Runnable myRunnable;
167
Raghunandan

Vous pouvez définir un booléen et le remplacer par false lorsque vous souhaitez arrêter le gestionnaire. Comme ça..

boolean stop = false;

handler.postDelayed(new Runnable() {
    @Override
    public void run() {

        //do your work here..

        if (!stop) {
            handler.postDelayed(this, delay);
        }
    }
}, delay);
6
Emre AYDIN

cela peut être vieux, mais pour ceux qui cherchent une réponse, vous pouvez utiliser ceci ...

public void stopHandler() {
   handler.removeMessages(0);
}

à votre santé

5
ralphgabb
  Boolean condition=false;  //Instance variable declaration.

 //-----------------Inside oncreate--------------------------------------------------- 
  start =(Button)findViewById(R.id.id_start);
        start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                starthandler();

                if(condition=true)
                {
                    condition=false;
                }


            }
        });

        stop=(Button) findViewById(R.id.id_stoplocatingsmartplug);

        stop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stophandler();

            }
        });


    }

//-----------------Inside oncreate---------------------------------------------------

 public void starthandler()
    {

        handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {


                if(!condition)
                {
                    //Do something after 100ms 


                }

            }
        }, 5000);

    }


    public void stophandler()
    {
        condition=true;
    }
2
vinay shetty