Android: Disable rotations by 90°, but enable rotations by 180°

android orientation screen-orientation
janjonas picture janjonas · Dec 6, 2010 · Viewed 7.9k times · Source

I would like to create an Android app (for a tablet) that should be only displayed in landscape orientation, e.g. the app should ignore rotations by 90°, but support rotations by 180°.

Adding android:screenOrientation="landscape" in the manifest causes the app to ignore all rotations, (even the 180° rotations), i.e. rotating the device by 180° shows the application upside down.

Without the android:screenOrientation attribute my app is displayed "correctly" in all four positions. Rotation the device by 180° flips the UI vertically resp. horizontally.

When rotation the device the following log messages are created (maybe this helps?):

[...]: INFO/WindowManager(1290): Setting rotation to 1, animFlags=0
Rotation is a value between 0 and 3 representing the current orientation.

Summarized: Is it possible to enable an app to support both landscape orientations?

Answer

olivierg picture olivierg · Jan 6, 2011

The new sensorLandscape screen orientation is apparently meant for this purpose.

Eg, you could do:

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);

Unfortunately, this is only available as of Android 2.3. I'm currently looking for a way to achieve this on Froyo.

Related questions

How to deal with apps that force screen orientation in android-x86 on VirtualBox?

If you've used an Android device, you're aware that there are some apps that force the display to portrait and ignore the device's orientation sensor. On a real device, this is not a problem, as you can physically rotate the …

Read More
Difference between SCREEN_ORIENTATION_USER and SCREEN_ORIENTATION_SENSOR

While developing an Android app, I've found two ActivityInfo attributes for setting the screen orientation. The attributes having USER are as follows: SCREEN_ORIENTATION_USER SCREEN_ORIENTATION_USER_LANDSCAPE SCREEN_ORIENTATION_USER_PORTRAIT The attributes having SENSOR are as follows: …

Read More
Lock screen orientation (Android)

I'm writing an android application that uses tabs with different contents (activities). In one of these activities, I would like to lock the screen orientation to "Landscape"-mode, but in the other activities, I want the normal orientation (according to …

Read More