Android landscape screen 180° rotation

Question

I need to know when my Android device screen is rotated from one landscape to another (rotation_90 to rotation_270). In my Android service, I reimplemented onConfigurationChanged(Configuration newConfig) to be aware of the rotation of the device. But this method is only called by the system if the device is rotated from ORIENTATION_PORTRAIT to ORIENTATION_LANDSCAPE, and not if it is rotated from ORIENTATION_LANDSCAPE (90°) to the other ORIENTATION_LANDSCAPE (270°) !!

How can I be called in this case? Thanks.

Answer 1

You can enable an OrientationEventListener to your activity.

OrientationEventListener mOrientationListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL) {

        @Override
        public void onOrientationChanged(int orientation) {
            Log.v(TAG, "Orientation changed to " + orientation);

            if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {
                return;
            }

            int degrees = -1;
            if (orientation < 45 || orientation > 315) {
                Log.i(TAG, "Portrait");
            } else if (orientation < 135) {
                degrees = 90;
                Log.i(TAG, "Landscape");    // This can be reverse landscape
            } else if (orientation < 225) {
                degrees = 180;
                Log.i(TAG, "Reverse Portrait");
            } else {
                degrees = 270;
                Log.i(TAG, "Reverse Landscape"); // This can be landscape
            }
        }
    };

    if (mOrientationListener.canDetectOrientation() == true) {
        Log.v(TAG, "Can detect orientation");
        mOrientationListener.enable();
    } else {
        Log.v(TAG, "Cannot detect orientation");
        mOrientationListener.disable();
    }