SCREEN_ORIENTATION_LANDSCAPE upside down - Why?

Question

I am using the following code to set orientation locking per user preference:

 private void doLock(boolean locked) {
     if (locked) {
       int o = getRes         


        

Answer 1

Simple and functional>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

    <activity
        android:screenOrientation="sensorLandscape"
    </activity>

  </application>

Answer 2

What you are describing is not a bug but rather the expected behavior from Android 2.2 or lower.

@forgivegod provided a theoretically correct approach, except that for Android 2.2 or lower the screenOrientation.reverseLandscape and screenOrientation.reversePortrait values are not recognized, even if faked (as @forgivegod's code does).

I bet you are seeing this problem when you rotate the phone clockwise (rotation=3) but not counter-clockwise (rotation=1).

Try with Android 2.3 or higher and see what happens.

Answer 3

try with universal landscape orientation

private static final int ORIENTATION_90 = 1;
private static final int ORIENTATION_0 = 0;
private static final int ORIENTATION_180 = 2;
private static final int ORIENTATION_270 = 3;

switch (orientation)
    {
      default:
      case ORIENTATION_0: // Portrait
        //dostuff
        break;
      case ORIENTATION_90: // Landscape left
        //do stuff
        break;
      case ORIENTATION_180: // Upside down.
        //do stuff
        break;
      case ORIENTATION_270: // Landscape right
        //do stuff
        break;
      }

Answer 4

Try the following to disable and enable orientation via code (this will work in API level 7 and up) :

public static void disableRotation(Activity activity) {
    final int orientation = activity.getResources().getConfiguration().orientation;
    final int rotation = activity.getWindowManager().getDefaultDisplay()
            .getOrientation();

    // Copied from Android docs, since we don't have these values in Froyo
    // 2.2
    int SCREEN_ORIENTATION_REVERSE_LANDSCAPE = 8;
    int SCREEN_ORIENTATION_REVERSE_PORTRAIT = 9;

    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.FROYO) {
        SCREEN_ORIENTATION_REVERSE_LANDSCAPE = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
        SCREEN_ORIENTATION_REVERSE_PORTRAIT = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
    }

    if (rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90) {
        if (orientation == Configuration.ORIENTATION_PORTRAIT) {
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        } else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        }
    } else if (rotation == Surface.ROTATION_180
            || rotation == Surface.ROTATION_270) {
        if (orientation == Configuration.ORIENTATION_PORTRAIT) {
            activity.setRequestedOrientation(SCREEN_ORIENTATION_REVERSE_PORTRAIT);
        } else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
            activity.setRequestedOrientation(SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
        }
    }
}

public static void enableRotation(Activity activity) {
    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}