Activity has leaked window that was originally added

What is this error, and why does it happen?

05-17 18:24:57.069: ERROR/WindowManager(18850): Activity com.mypkg.myP has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44c46ff0 that was originally added here
05-17 18:24:57.069: ERROR/WindowManager(18850): android.view.WindowLeaked: Activity ccom.mypkg.myP has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44c46ff0 that was originally added here
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.ViewRoot.<init>(ViewRoot.java:231)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.Dialog.show(Dialog.java:239)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at com.mypkg.myP$PreparePairingLinkageData.onPreExecute(viewP.java:183)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.os.AsyncTask.execute(AsyncTask.java:391)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at com.mypkg.myP.onCreate(viewP.java:94)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.ActivityThread.access$2200(ActivityThread.java:126)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.os.Looper.loop(Looper.java:123)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.ActivityThread.main(ActivityThread.java:4595)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at java.lang.reflect.Method.invokeNative(Native Method)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at java.lang.reflect.Method.invoke(Method.java:521)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at dalvik.system.NativeStart.main(Native Method)

You're trying to show a Dialog after you've exited an Activity.

[EDIT]

This question is one of the top search on google for android developer, therefore Adding few important points from comments, which might be more helpful for future investigator without going in depth of comment conversation.

Answer 1 :

> You're trying to show a Dialog after you've exited an Activity.

Answer 2

> This error can be a little misleading in some circumstances (although > the answer is still completely accurate) - i.e. in my case an > unhandled Exception was thrown in an AsyncTask, which caused the > Activity to shutdown, then an open progressdialog caused this > Exception.. so the 'real' exception was a little earlier in the log

Answer 3

> Call dismiss() on the Dialog instance you created before exiting your > Activity, e.g. in onPause() or onDestroy()

The solution is to call dismiss() on the Dialog you created in viewP.java:183 before exiting the Activity, e.g. in onPause(). All Windows&Dialogs should be closed before leaving an Activity.

If you are using AsyncTask, probably that log message can be deceptive. If you look up in your log, you might find another error, probably one in your doInBackground() method of your AsyncTask, that is making your current Activity to blow up, and thus once the AsyncTask comes back.. well, you know the rest. Some other users already explained that here :-)

I triggered this error by mistakenly calling hide() instead of dismiss() on an AlertDialog.

You can get this exception by just a simple/dumb mistake, by (for example) accidentally calling finish() after having displayed an AlertDialog, if you miss a break call statement in a switch statement...

   @Override
   public void onClick(View v) {
   	switch (v.getId()) {
    	case R.id.new_button:
    		openMyAlertDialog();
    		break; <-- If you forget this the finish() method below 
                       will be called while the dialog is showing!
    	case R.id.exit_button:
    		finish();
    		break;
    	}
    }

The finish() method will close the Activity, but the AlertDialog is still displaying!

So when you're staring intently at the code, looking for bad threading issues or complex coding and such, don't lose sight of the forest for the trees. Sometimes it can be just something as simple and dumb as a missing break statement. :)

The answers to this question were all correct, but a little confusing for me to actually understand why. After playing around for around 2 hours the reason to this error (in my case) hit me:

You already know, from reading other answers, that the has X has leaked window DecorView@d9e6131[] error means a dialog was open when your app closed. But why?

It could be, that your app crashed for some other reason while your dialog was open

This lead to your app closing because of some bug in your code, which lead to the dialog remaining open at the same time as your app closed due to the other error.

So, look through your logical. Solve the first error, and then the second error will solve itself

One error causes another, which causes another, like DOMINOS!

This problem arises when trying to show a Dialog after you've exited an Activity.

I just solved this problem just by writing down the following code:

@Override
public void onDestroy(){
	super.onDestroy();
	if ( progressDialog!=null && progressDialog.isShowing() ){
	    progressDialog.cancel();
	}
}

Basically, from which class you started progressDialog, override onDestroy method and do this way. It solved "Activity has leaked window" problem.

I recently faced the same issue.

The reason behind this issue is that the activity being closed before the dialog is dismissed. There are various reasons for the above to happen. The ones mentioned in the posts above are also correct.

I got into a situation, because in the thread, I was calling a function which was throwing exception. Because of which the window was being dismissed and hence the exception.

This could help.

if (! isFinishing()) {

	dialog.show();
		
	}

Dismiss the dialog when activity destroy

@Override
protected void onDestroy()
{
    super.onDestroy();
    if (pDialog!=null && pDialog.isShowing()){
        pDialog.dismiss();
    }
}

I had the same obscure error message and had no idea why. Given clues from the previous answers, I changed my non-GUI calls to mDialog.finish() to be mDialog.dismiss() and the errors disappeared. This wasn't affecting my widget's behavior but it was disconcerting and could well have been flagging an important memory leak.

I was having the same problem and found this page, and while my situation was different I called finish from a if block before it defined the alert box.

So, simply calling dismiss wouldn't work (as it hasn't been made yet) but after reading Alex Volovoy's answer and realizing it was the alert box causing it. I tried to add a return statement right after the finish inside that if block and that fixed the issue.

I thought once you called finish it stopped everything and finished right there, but it doesn't. It seem to go to the end of the block of code it's in then finishes.

So, if you want to implement a situation where sometimes it'll finish before doing some code you do gotta put a return statement right after the finish or it'll keep on going and and act like the finish was called at the end of the block of code not where you called it. Which is why I was getting all those weird errors.

private picked(File aDirectory){
     if(aDirectory.length()==0){
		setResult(RESULT_CANCELED, new Intent()); 
		finish(); 
		return;
	}
     AlertDialog.Builder alert= new AlertDialog.Builder(this); // Start dialog builder
     alert
		.setTitle("Question")
		.setMessage("Do you want to open that file?"+aDirectory.getName());
	alert
		.setPositiveButton("OK", okButtonListener)
		.setNegativeButton("Cancel", cancelButtonListener);
    alert.show();
}

If you don't put the return right after I called finish in there, it will act as if you have called it after the alert.show(); and hence it would say that the window is leaked by finishing just after you made the dialog appear, even though that's not the case, it still think it is.

I thought I'd add this as here as this shows the finish command acted differently then I thought it did and I'd guess there are other people who think the same as I did before I discovered this.

I was getting these logs in my video player application. These messages were thrown while the video player was closed. Interestingly, I used to get these logs once in a few runs in a random manner. Also my application does not involve in any progressdialog. Finally, I got around this issue with the below implementation.

@Override
protected void onPause()
{
	Log.v("MediaVideo", "onPause");
	super.onPause();
	this.mVideoView.pause();
	this.mVideoView.setVisibility(View.GONE);
}

@Override
protected void onDestroy()
{
	Log.v("MediaVideo", "onDestroy");
	super.onDestroy();
}

@Override
protected void onResume()
{
	Log.v("MediaVideo", "onResume");
	super.onResume();
	this.mVideoView.resume();
}

Override the OnPause with call to mVideoView.pause() and the set visibility to GONE. This way I could resolve the "Activity has leaked window" log error issue.

This is not the answer to the question but it's relevant to the topic.

If the activity has defined an attribute in the Manifest

 android:noHistory="true"

then after executing onPause(), the context of activity is lost. So all the view's using this context might give this error.

Generally this issue occurs due to progress dialog : you can solve this by using any one of the following method in your activity:

 // 1):
          @Override
                protected void onPause() {
                    super.onPause();
                    if ( yourProgressDialog!=null && yourProgressDialog.isShowing() )
                  {
                        yourProgressDialog.cancel();
                    }
                }
    
       // 2) :
         @Override
            protected void onDestroy() {
                super.onDestroy();
                if ( yourProgressDialog!=null && yourProgressDialog.isShowing()
               {
                    yourProgressDialog.cancel();
                }
            }

here is a solution when you do want to dismiss AlertDialog but do not want to keep a reference to it inside activity.

solution requires you to have androidx.lifecycle dependency in your project (i believe at the moment of the comment it's a common requirement)

this lets you to delegate dialog's dismiss to external object (observer), and you dont need to care about it anymore, because it's auto-unsubscribed when activity dies. (here is proof: https://github.com/googlecodelabs/android-lifecycles/issues/5).

so, the observer keeps the reference to dialog, and activity keeps reference to observer. when "onPause" happens - observer dismisses the dialog, and when "onDestroy" happens - activity removes observer, so no leak happens (well, at least i dont see error in logcat anymore)

// observer
class DialogDismissLifecycleObserver( private var dialog: AlertDialog? ) : LifecycleObserver {
	@OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
	fun onPause() {
		dialog?.dismiss()
		dialog = null
	}
}
// activity code
private fun showDialog() {
		if( isDestroyed || isFinishing ) return
		val dialog = AlertDialog
            .Builder(this, R.style.DialogTheme)
            // dialog setup skipped
			.create()
		lifecycle.addObserver( DialogDismissLifecycleObserver( dialog ) )
        dialog.show()
}

Not only try to show an alert but it can also be invoked when you finish a particular instance of activity and try to start new activity/service or try to stop it.

Example:

OldActivity instance;

    oncreate() {
       instance=this;
    }
    instance.finish();
    instance.startActivity(new Intent(ACTION_MAIN).setClass(instance, NewActivity.class));

The "Activity has leaked window that was originally added..." error occurs when you try show an alert after the Activity is effectively finished.

You have two options AFAIK:

1. Rethink the login of your alert: call dismiss() on the dialog before actually exiting your activity.
2. Put the dialog in a different thread and run it on that thread (independent of the current activity).

Had the problem where I finished an Activity when a ProgressDialog was still shown.

So first hide the Dialog and then finish the activity.

Try this code:

public class Sample extends Activity(){
@Override
 public void onCreate(Bundle instance){

}
 @Override
    public void onStop() {
        super.onStop();
      progressdialog.dismiss(); // try this
    }

}

This can be if you have an error at doInBackground() function and have this code.

Try to add dialog at last. At first check and fix doInBackground() function

protected void onPreExecute() {
     super.onPreExecute();
     pDialog = new ProgressDialog(CreateAccount.this);
     pDialog.setMessage("Creating Product..");
     pDialog.setIndeterminate(false);
     pDialog.setCancelable(true);
     pDialog.show();

 }

 protected String doInBackground(String...args) {
     ERROR CAN BE IS HERE
 }

 protected void onPostExecute(String file_url) {
     // dismiss the dialog once done
     pDialog.dismiss();

This happened to me when i am using ProgressDialog in AsyncTask. Actually i am using hide() method in onPostExecute. Based on the answer of @Alex Volovoy i need to use dismiss() with ProgressDialog to remove it in onPostExecute and its done.

progressDialog.hide(); // Don't use it, it gives error

progressDialog.dismiss(); // Use it

You have to make Progressdialog object in onPreExecute method of AsyncTask and you should dismiss it on onPostExecute method.

Best solution is just add dialog in try catch and dismiss dialog when exception occur

> Just use below code

 try {
        dialog.show();
    } catch (Exception e) {
        dialog.dismiss();
    }

Best solution is put this before showing progressbar or progressDialog

if (getApplicationContext().getWindow().getDecorView().isShown()) {

  //Show Your Progress Dialog

}

In my case, the reason was that I forgot to include a permission in the Android manifest file.

How did I find out? Well, just like @Bobby says in a comment beneath the accepted answer, just scroll further up to your logs and you'll see the first reason or event that really threw the Exception. Apparently, the message "Activity has leaked window that was originally added" is only an Exception that resulted from whatever the first Exception is.

Try below code , it will work any time you will dismiss the progress dialogue and it will see whether its instance is available or not.

try {
		if (null != progressDialog && progressDialog.isShowing()) {
			progressDialog.dismiss();
			progressDialog = null;
		}
	} catch (Exception e) {
		e.printStackTrace();
	}

Window leaked exceptions have two reasons:

1. showing the dialog when Activity Context doesn't exists, to solve this you should show the dialog only you are sure Activity exists:

   if(getActivity()!= null && !getActivity().isFinishing()){ Dialog.show(); }

2. not dismiss the dialog appropriately, to solve use this code:

   @Override public void onDestroy(){ super.onDestroy(); if ( Dialog!=null && Dialog.isShowing() ){ Dialog.dismiss(); } }

I have another solution for this, and would like to know if it seems valid to you: instead of dismissing in the onDestroy, which seems to be the leading solution, I'm extending ProgressDialog...

public class MyProgressDialog extends ProgressDialog {

  private boolean isDismissed;

  public MyProgressDialog(Context context) {
    super(context);
  }

  @Override
  public void onDetachedFromWindow() {
    super.onDetachedFromWindow();
    dismiss();
  }

  @Override
  public void dismiss() {
    if (isDismissed) {
      return;
    }
    try {
      super.dismiss();
    } catch (IllegalArgumentException e) {
      // ignore
    }
    isDismissed = true;
  }

This is preferable, AFAIC, because you don't have to hold the progress dialog as a member, just fire(show) and forget

  if (mActivity != null && !mActivity.isFinishing() && mProgressDialog != null && mProgressDialog.isShowing()) {
        mProgressDialog.dismiss();
    }

Got this error when trying to display a Toast from Background thread. It was solved by running the UI related code on the UI thread

Just make sure your activity is not closing unexpectedly due to some exceptions raised somewhere in your code. Generally it happens in async task when activity faces force closure in doinBackground method and then asynctask returns to onPostexecute method.

I have the same kind of problem. the error was not in the Dialog but in a EditText. I was trying to change the value of the Edittext inside of a Assynctask. the only away i could solve was creating a new runnable.

runOnUiThread(new Runnable(){
      @Override
      public void run() {
       ...        
      }
    });  

The issue according to me is you are trying to call a dialog right after an activity is getting finished so according me what you can do is give some delay using Handler and you issue will be solved for eg:

 Handler handler=new Handler();
     handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                     dialog.show();
                     //or
                     dialog.dismiss();
     
                }
            },100);

dismiss progressBar before activity destroyed

@Override
	protected void onDestroy() {
		try {
			if (progressDialog != null)
				progressDialog.dismiss();
		} catch (Exception e) {
			e.printStackTrace();
		}
		super.onDestroy();
	}

In Kotlin this is what I have used to fix this issue

if (!isFinishing)
   dialog.show()

Maybe this will helpful for you!

I was using a dialog `onError of a Video Player, and instead of going crazy (I've tested all of these solutions)

I've opted for DialogFragment http://developer.android.com/reference/android/app/DialogFragment.html.

You can return the builder creation in an inner DialogFragment class, just override onCreateDialog

I also encounter the WindowLeaked problem when run monkey test.The logcat is below.

android.support.v7.app.AppCompatDelegateImplV7$ListMenuDecorView@4334fd40 that was originally added here
android.view.WindowLeaked: Activity com.myapp.MyActivity has leaked window android.support.v7.app.AppCompatDelegateImplV7$ListMenuDecorView@4334fd40 that was originally added here
            at android.view.ViewRootImpl.<init>(ViewRootImpl.java:409)
            at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:312)
            at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
            at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
            at android.view.Window$LocalWindowManager.addView(Window.java:554)
            at android.support.v7.app.AppCompatDelegateImplV7.openPanel(AppCompatDelegateImplV7.java:1150)
            at android.support.v7.app.AppCompatDelegateImplV7.onKeyUpPanel(AppCompatDelegateImplV7.java:1469)
            at android.support.v7.app.AppCompatDelegateImplV7.onKeyUp(AppCompatDelegateImplV7.java:919)
            at android.support.v7.app.AppCompatDelegateImplV7.dispatchKeyEvent(AppCompatDelegateImplV7.java:913)
            at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.dispatchKeyEvent(AppCompatDelegateImplBase.java:241)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:2009)
            at android.view.ViewRootImpl.deliverKeyEventPostIme(ViewRootImpl.java:3929)
            at android.view.ViewRootImpl.deliverKeyEvent(ViewRootImpl.java:3863)
            at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3420)
            at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4528)
            at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4506)
            at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4610)
            at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
            at android.os.MessageQueue.nativePollOnce(Native Method)
            at android.os.MessageQueue.next(MessageQueue.java:125)
            at android.os.Looper.loop(Looper.java:124)
            at android.app.ActivityThread.main(ActivityThread.java:4898)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
            at dalvik.system.NativeStart.main(Native Method)

My Activity is AppCompatActivity.And I resovled it with the below code in the Activity.

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
    // added by sunhang : intercept menu key to resove a WindowLeaked error in monkey-test.
    if (event.getKeyCode() == KeyEvent.KEYCODE_MENU) {
        return true;
    }
    return super.dispatchKeyEvent(event);
}

I was also facing this problem for some time but I realized it's not because of dialog in my case it's because of ActionMode. So if you are trying to finish activity when an ActionMode is open it will cause this problem. In your activity's onPause finish the action mode.

 private ActionMode actionMode;

 @Override
 public void onActionModeStarted(ActionMode mode) {
    super.onActionModeStarted(mode);
    actionMode = mode;
 }

 @Override
 protected void onPause() {
    super.onPause();
    if (actionMode != null) actionMode.finish();
 }

Ensure to call this.dialog.show . (Activity)

Maybe you used findViewById in activity instead of dialog.findViewById and set afterwards an OnClickListener on a null instance and that probably caused the original error.

If you are dealing with LiveData, when updating value instead of using liveData.value = someValue try to do liveData.postValue(someValue)

I am making a scientific app that is already close to 45 thousand lines and I use asynchronous tasks in order to be able to interrupt long tasks, if so desired, with a certain click of the user.

Thus, there is a responsive user interface and sometimes a long task in parallel.

When the long task is over, I need to run a routine that manages the user interface.

So, at the end of an asynchronous task, I do a following action that involves the interface, which cannot be performed directly, otherwise it gives an error. So I use

this.runOnUiThread(Runnable { x(...)})   // Kotlin

Many times, this error occurs in some point of function x.

If function x was called outside a thread

              x(...)  // Kotlin

Android Studio would show a call stack with the error line and one easily could fix the problem in few minutes.

As my source code is tamed, and there is no serious structural problem (many answers above describe this kind of errors), the reason for this scary error message is more gross and less important.

It's just any fool mistake in this execution linked to a thread (like, for example, accessing a vector beyond the defined length), as in this schematic example:

           var i = 10                  // Kotlin
           ...
           var arr = Array(5){""}       
           var element = arr[i]       // 10 > 5, it's a index overflow

Regarding this stupid error, Android Studio unfortunately doesn't point to it.

I even consider it a bug, because Android Studio knows that there is an error, where it is located, but, for some unknown reason, it gets lost and gives a random message, totally disconnected from the problem, i.e, a weird message with no hint showing up.

The solution: Have a lot of patience to run step by step in the debugger until reaching the error line, which Android Studio refused to provide.

This has happened to me several times and I guess it's an extremely common mistake on Android projects. I had never before given this kind of error to me before I used threads.

Nobody is infallible and we are liable to make small mistakes. In this case, you cannot count on the direct help of Android Studio to discover where is your error!

如果只是处理Dialog在Acticity.onConfigurationChanged出现的问题

If you just deal with the problem of Dialog in Activity.onConfigurationChanged

//若`AndroidManifest.xml`中已经配置了`android:configChanges="orientation|screenSize|screenLayout|smallestScreenSize"`则不需要设置该项
//If `android:configChanges="orientation|screenSize|screenLayout|smallestScreenSize"` has been configured in `AndroidManifest.xml`, you do not need to set this item
Acticity/Context.registerComponentCallbacks(object : ComponentCallbacks {
    override fun onConfigurationChanged(newConfig: Configuration) {
        dialog?.dismiss()
    }
    override fun onLowMemory() {
    }
})

在onDestroy中销毁更保险点

It is safer to destroy in on Destroy

override fun onDestroy() {
    super.onDestroy()
    DialogManager.dismiss()
}

Maybe this is useful for you  https://github.com/javakam/DialogManager

I was using Jetpack Compose and no dialogues so most of these answers were not applicable to me. It turned out that I was accessing out of range array index in a Kotlin coroutine. I wrapped all the coroutine calls in try and catch.

try {
     viewModelScope.launch(Dispatchers.IO) {
     ....
     }
} catch (e: Exception) {
     Log.e("Exception: ", e.message.toString())
}

And finally found the error (or should I say my mistake :P).