窗口泄漏异常有两个原因:

1)当Activity上下文不存在时显示对话框，为了解决这个问题，你应该只显示你确定Activity存在的对话框:

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

2)对话框不适当解散，解决使用以下代码:

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

唯一的答案是

  @Override
    public void onBackPressed() {

        exit_popup();
       // super.onBackPressed(); remove this line

    }

在运行猴子测试时，我也遇到了windowleaks的问题。logcat在下面。

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)

我的活动是AppCompatActivity。我用下面的代码在活动中解决了它。

@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);
}

解决方案是在退出Activity之前在view .java:183中创建的对话框上调用dismiss()，例如在onPause()中。所有的窗口和对话框应该在离开一个活动之前关闭。

这里有一个解决方案，当你想要解散AlertDialog，但不想在活动中保留对它的引用。

解决方案要求您拥有androidx。项目中的生命周期依赖关系(我相信在评论的时候，这是一个常见的需求)

这让你可以将对话框的解散委托给外部对象(观察者)，你不需要再关心它了，因为当活动终止时它会自动取消订阅。(这里是证明:https://github.com/googlecodelabs/android-lifecycles/issues/5)。

因此，观察者保持对对话的引用，而活动保持对观察者的引用。当“onPause”发生时-观察者解散对话框，当“onDestroy”发生时-活动删除观察者，所以没有泄漏发生(好吧，至少我不会在logcat中看到错误)

// 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()
}

当您退出活动后试图显示对话框时，会出现此问题。

我只是通过写下下面的代码解决了这个问题:

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

基本上，从哪个类你开始progressDialog，覆盖onDestroy方法，这样做。它解决了“活动已泄漏窗口”的问题。