Android I want to get rotation angle for device

Question

For example, I started application then device is turned 90 degree by side.I want to detect this event for each planes on device.

Answer 1

You can get the screen orientation (for example in your onResume() Method) like this:

private static final int ORIENTATION_0 = 0;
private static final int ORIENTATION_90 = 3;
private static final int ORIENTATION_270 = 1;





Display display = ((WindowManager)
          getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int screenOrientation = display.getRotation();

switch (screenOrientation)
{
default:
case ORIENTATION_0: // Portrait
   // do smth.
break;
case ORIENTATION_90: // Landscape right
   // do smth.
break;
case ORIENTATION_270: // Landscape left
   // do smth.
break;
}

Answer 2

Use SensorManager and TYPE_GYROSCOPE/TYPE_ROTATION_VECTOR/TYPE_ORIENTATION/ to get these value.

Look this page for details.

Answer 3

I think you have to use the sensor manager to calculate x,y,z on every point. and use equation to find angle between two points. consider your starting points (0,0,0);

Answer 4

You can use OrientationEventListener for the planes

OrientationEventListener mOrientationListener = new OrientationEventListener(
            getApplicationContext()) {
        @Override
        public void onOrientationChanged(int orientation) {

        }
    };

    if (mOrientationListener.canDetectOrientation()) {
        mOrientationListener.enable();
    }