Android 11.0 播放视频时，拦截亮度事件暂停

frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

    public long interceptKeyBeforeDispatching(IBinder focusedToken, KeyEvent event,int policyFlags) {
    
    
       if (keyCode == KeyEvent.KEYCODE_BRIGHTNESS_UP || keyCode == KeyEvent.KEYCODE_BRIGHTNESS_DOWN) {
    
    
            if (down) {
    
    
                //播放视频时，拦截亮度事件暂停
                android.app.ActivityManager am = (android.app.ActivityManager) mContext.getSystemService(ACTIVITY_SERVICE);
                android.content.ComponentName cn = am.getRunningTasks(1).get(0).topActivity;
                if ("xxx.Activity".equals(cn.getClassName())) return 0;
        }
 }