IllegalArgumentException: Window type can not be changed after the window is added

问题

I've tried the advice here, the advice here, the advice here, I've commented out the onAttachedToWindow() in my Base Activity. I have two Activities inheriting from this class, BaseActivity. One runs, and one does not. What could be the difference? My target SDK is 19; changing it to 12 makes no difference. Here is my onCreate for BaseActivity:

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onAttachedToWindow();
    super.onCreate(savedInstanceState);

    ....
    }

When navigating to the second activity, stepping through the code, it makes it through onCreate(), onResume(), then crashes.

What could be the problem?

Stacktrace:

06-26 13:41:57.963  28667-28667/com.assistek.ediary E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.assistek.ediary, PID: 28667
java.lang.IllegalArgumentException: Window type can not be changed after the window is added.
        at android.os.Parcel.readException(Parcel.java:1550)
        at android.os.Parcel.readException(Parcel.java:1499)
        at android.view.IWindowSession$Stub$Proxy.relayout(IWindowSession.java:903)
        at android.view.ViewRootImpl.relayoutWindow(ViewRootImpl.java:5301)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1507)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
        at android.view.Choreographer.doCallbacks(Choreographer.java:580)
        at android.view.Choreographer.doFrame(Choreographer.java:550)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

EDIT: if I change to target API 12 and put all of the changes in from onCreate into onAttachedToWindow, I can get this exception to go away, but I'd like the target SDK to be 19.

My new onCreate():

@Override
protected void onCreate(Bundle savedInstanceState) {

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
...
}

My new onAttachedToWindow():

@Override
public void onAttachedToWindow() {
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
    super.onAttachedToWindow();
}

This only works with target API 12.

Answer Min target must be less than 14 when WindowManager.LayoutParams.TYPE_KEYGUARD used

回答1:

Try to use this for window :

requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                     WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_adjectives);

回答2:

I run into the same question. But after stopping adding

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
requestWindowFeature(Window.FEATURE_NO_TITLE);

before super.onCreate(savedInstanceState); of BaseActivity, it works well. I cut and paste above codes before super.onCreate(savedInstanceState); of descends of BaseActivity.

BTW, I don't think you have to call super.onAttachedToWindow(); inside methods of life circle of Activity. Because onAttachedToWindow(); is called when the view is attached to a window when you overriding a View.

回答3:

I also had this problem, but I solved it by removing the Window, changing the params and then adding the window again. This was good enough for me.

WindowManager.removeView(View); params = params2; //changed the params to something else WindowManager.updateViewLayout(View, params); WindowManager.addView(View, params);

回答4:

Remove

this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG|WindowManager.LayoutParams.FLAG_FULLSCREEN);

From your onAttachedToWindow(), like this:

 @Override
     public void onAttachedToWindow() {
        //this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG|WindowManager.LayoutParams.FLAG_FULLSCREEN);

          super.onAttachedToWindow();
     }

回答5:

Sorry for late reply. You should add:

requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);

in onCreate method if you are using api level 15 or above. It works for me.

来源：https://stackoverflow.com/questions/31081968/illegalargumentexception-window-type-can-not-be-changed-after-the-window-is-add