Android屏幕重力感应旋转

public class MainActivity extends AppCompatActivity {

　　private MyOrientoinListener myOrientoinListener;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

myOrientoinListener = new MyOrientoinListener(this);
boolean autoRotateOn = (android.provider.Settings.System.getInt(getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 0) == 1);
//检查系统是否开启自动旋转
if (autoRotateOn) {
myOrientoinListener.enable();
}
}

@Override
protected void onDestroy() {
super.onDestroy();
//销毁时取消监听
myOrientoinListener.disable();
}

class MyOrientoinListener extends OrientationEventListener {
public MyOrientoinListener(Context context) {
super(context);
}

public MyOrientoinListener(Context context, int rate) {
super(context, rate);
}

@Override
public void onOrientationChanged(int orientation) {
int screenOrientation = getResources().getConfiguration().orientation;

if (((orientation >= 0) && (orientation < 45)) || (orientation > 315)) {    //设置竖屏
if (screenOrientation != ActivityInfo.SCREEN_ORIENTATION_PORTRAIT && orientation != ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
} else if (orientation > 225 && orientation < 315) { //设置横屏
if (screenOrientation != ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
} else if (orientation > 45 && orientation < 135) {// 设置反向横屏
if (screenOrientation != ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
}
} else if (orientation > 135 && orientation < 225) { //反向竖屏
if (screenOrientation != ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
}
}
}
}