android - WindowManager$BadTokenException 无法添加窗口

Question

我正在开发用于背景视频录制 的应用程序，这就是我使用 WindowManager 的原因，但它对我不起作用。出现以下错误:

08-23 15:38:21.021: E/AndroidRuntime(4200): java.lang.RuntimeException: Unable to create service com.example.prankapp.BackgroundVideoRecorder: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@418c0b68 -- permission denied for this window type
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2277)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.access$1600(ActivityThread.java:128)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1215)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.os.Handler.dispatchMessage(Handler.java:99)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.os.Looper.loop(Looper.java:137)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.main(ActivityThread.java:4517)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at java.lang.reflect.Method.invokeNative(Native Method)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at java.lang.reflect.Method.invoke(Method.java:511)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at dalvik.system.NativeStart.main(Native Method)
    08-23 15:38:21.021: E/AndroidRuntime(4200): Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@418c0b68 -- permission denied for this window type
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.ViewRootImpl.setView(ViewRootImpl.java:707)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:301)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at com.example.prankapp.BackgroundVideoRecorder.onCreate(BackgroundVideoRecorder.java:53)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2267)
    08-23 15:38:21.021: E/AndroidRuntime(4200):     ... 10 more

我的窗口管理器代码:

windowManager = (WindowManager) this.getSystemService(BackgroundVideoRecorder.WINDOW_SERVICE);
            surfaceView = new SurfaceView(this);
            LayoutParams layoutParams = new WindowManager.LayoutParams(
                1, 1,
                WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
                WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
                PixelFormat.TRANSLUCENT
            );
            //layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
            windowManager.addView(surfaceView, layoutParams);
            surfaceView.getHolder().addCallback(this);

请帮助我。提前致谢。

Answer 1

08-23 15:38:21.021: E/AndroidRuntime(4200): Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@418c0b68 -- permission denied for this window type

问题: maifest 文件中缺少权限。

解决方案:在 AndroidManifest 中使用以下权限。

android.permission.SYSTEM_ALERT_WINDOW