Can a live wallpaper lock the screen in portrait mode?

Question

Can a live wallpaper lock the screen in portrait mode? And if so, how?

I should mention that I have seen two supposed answers to this question on SO, one appeared inordinately complicated, I didn't understand it all and the answer was not accepted by the original poster. The second answer didn't work for me.

A third answer involving the use of:

android:screenOrientatin = "portrait" or "landscape"

has been suggested, but it is not clear exactly where this should go in the manifest.

EDIT: have tried putting android:screenOrientation="portrait" in many different places in the manifest, and none of them worked.

EDIT: another answer was to rotate your bitmaps and handle a rotation by just drawing everything sideways - but this looks very ugly because, as you rotate you phone, the OS instigates a rotation animation - which means that you get a horrid jumping effect as you turn the phone.

possible duplicate of [Prevent Live Wallpaper orientation change when an application is opened and orientation is changed?](http://stackoverflow.com/questions/4372936/prevent-live-wallpaper-orientation-change-when-an-application-is-opened-and-orie) — Peter O., Apr 23 '13 at 17:32
Please don't close this question before I have an answer that is A) unambiguous and B) works. — Mick, Apr 23 '13 at 17:45
Create an invisible view and it works fine to me :) [http://stackoverflow.com/questions/14587085/how-can-i-globally-force-screen-orientation-in-android](http://stackoverflow.com/questions/14587085/how-can-i-globally-force-screen-orientation-in-android) — Matthew, Nov 28 '15 at 22:07

score 2 · Accepted Answer · answered May 02 '13 at 13:59

2

I'm beginning to suspect that the true answer is simply "no".

answered May 02 '13 at 13:59

Mick

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score 0 · Answer 2 · answered Apr 26 '13 at 19:48

0

Did you try setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); ?

answered Apr 26 '13 at 19:48

Leo

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setRequestedOrientation appears to be undefined for a WallpaperService – Mick May 02 '13 at 13:19
Perhaps you must implements something like Activity? – Leo May 03 '13 at 10:00

score 0 · Answer 3 · answered May 02 '13 at 09:18

In your AndroidManifest.xml you should have something like:

    <application
    android:icon="@drawable/app_icon"
    android:label="@string/nuboLogin"
    android:name=".LoginApplication" 
     android:debuggable="true">
    <activity
        android:name=".WallPaperActivity"
        android:label="@string/wallPaper" 
        android:windowSoftInputMode="adjustPan" 
        android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" android:screenOrientation="portrait"
        android:configChanges="orientation|keyboardHidden">
    </activity>

This should make sure that your Activity runs in portrait mode. If you prefer landscape, you can easily guess what you should modify

A wallpapr is a "service" not an activity... but anyway I tried adding android:screenOrientation="portrait" and it had no effect :-( — Mick, May 02 '13 at 13:17

score 0 · Answer 4 · answered May 03 '13 at 06:37

Android application restarts the activity when the orientation changes. You can either use

android:configChanges in your manifest. The activity is shut down and restarted by default, when a configuration change occurs at runtime, but declaring a configuration with this attribute will prevent the activity from being restarted. Instead, the activity remains running and its onConfigurationChanged() method is called.
use android:screenOrientatin = "portrait" or "landscape" it will force the app to run in the mode you specify. However it will not prevent the activity from being shut down and restarted.

Can a live wallpaper lock the screen in portrait mode?

4 Answers4