如何在android中以编程方式启用屏幕旋转？

Question

I need to enable this function for an activity of mine:

I want it to be like this:

when it's like this:

please note that I DON'T want to set it fixed as PORTRAIT, LANDSCAPE or any other orientation, I really want the user to rotate the device freely.

Do I need to request any permission on manifest? Is it even posible to do that? I couldn't find anything that actually work, for example:

this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

just does not work at all.

Answer 1

Do you want to change the device settings or just for your app?
If you want to change it for your app:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
    setContentView(view);
}