Rotating phone quickly 180 degrees, camera preview turns upside down

Question

I have a custom camera application. When I rotating the phone by 90, camera preview works fine. But when I rotate phone quickly 180 degree, camera preview turns upside down.

Answer 1

You can use OrientationEventListener to trigger recalculation of camera rotation.

Add to your activity:

private OrientationEventListener orientationListener = null;

to onCreate():

orientationListener = new OrientationEventListener(this) {
    public void onOrientationChanged(int orientation) {
        setCameraDisplayOrientation(CustomCameraActivity.this, cameraId, camera);
    }
};

to surfaceCreated():

orientationListener.enable();

to surfaceDestroyed():

orientationListener.disable();

Now, it almost works. To make setCameraDisplayOrientation() more robust,

1. add check for camera != null
2. only call camera.setDisplayOrientation(result) (or perform any heavy-lifting) if result changed since last time the function was called.

Answer 2

android:configChanges="keyboardHidden|orientation|screenSize"

Add this line in your Android Manifest file after declaring all activities in activity tags *

like:

<activity android:name="com.geeklabs.ActivityMain"
            android:configChanges="keyboardHidden|orientation|screenSize" />

May be it will helps you.