了解设备方向是否已锁定(检测是否启用了自动旋转)

用这个:

if (android.provider.Settings.System.getInt(getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 0) == 1){
        Toast.makeText(getApplicationContext(), "Auto Rotate is ON", Toast.LENGTH_SHORT).show();

    }
    else{
        Toast.makeText(getApplicationContext(), "Auto Rotate is OFF", Toast.LENGTH_SHORT).show();
    }