I have an alarm which periodically (every 30 sec) wakes up my device. When the alarms starts, I use the following code to open a window:
private void CreatePreviewDialog()
{
dummy_frame_layout = new DummyFrameLayout(context);
wm_params = new WindowManager.LayoutParams(
240, 320, 0, 0,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
// WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON|
WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD|
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED|
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON|
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
PixelFormat.TRANSLUCENT);
wm_params.gravity = Gravity.CENTER;
wm_params.setTitle("Preview");
window_manager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
window_manager.addView(dummy_frame_layout, wm_params);
}
Then, I close the window with the following code:
private void DestroyPreviewDialog()
{
((WindowManager)context.getSystemService(Context.WINDOW_SERVICE)).removeView(dummy_frame_layout);
dummy_frame_layout = null;
}
The problem is as follows. Suppose that the device is in standby mode. When the alarm happens it calls CreatePreviewDialog that turns on the display. When the DestroyPreviewDialog is called, I would like that the device returns in its standby mode or, at least, that the display turns off but I have not found any solution to this problem. I've also added the following code before closing the window in DestroyPreviewDialog:
wm_params.screenBrightness = 0.0f;
window_manager.updateViewLayout(dummy_frame_layout, wm_params);
but nothing happens. The screen remains on showing the lockscreen till the next alarm happens. Just like if the application is in foreground. Any idea?
