Android：如何忽略围绕单轴的旋转？

Question

I'm developing application, where activity starts after phone's rotation. When you rotate phone backward that activity have to finish. Is it possible to ignore rotation around other axes?

Answer 1

You can check which way the phone is held with this:

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

Then you can check the orientation like this:

switch (rotation)
{
    case Surface.ROTATION_90:
        ...
        break;
    case Surface.ROTATION_180:
        ...
        break;
    case Surface.ROTATION_270:
        ...
        break;
    default:
        ...
        break;
}

(Note that for pre-API 8 versions you'd need to use display.getOrientation() instead of display.getRotation() )