Develop Reference

Is it possible to change orientation of device when default device rotation is off?

I am using an application for meditation on daily basis, today i was surprised by it because when i rotate screen, App goes to landscape mode, Although the Automatic rotation was off from my settings, How it can happen?
Is there something like Force device to change orientation?
And If default device rotation is off then how app can know that device orientation is changed?
I double checked my phones settings of Auto-Rotation and they were off.I am using Kitkat device.

In AndroidManifest.xml file set activity tag, screenOrientation attribute to fullSensor like this:
<activity
android:name=".MyActivity"
android:screenOrientation="fullSensor" />

Yes. you can.
in onCreate method type
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
this will do the magic.

Android: Orientation Issue

I have an activity that shows a video. I want this view to show only on landscape, so I have my AndroidManifest.xml as follow:
<activity
android:name="uk.co.tangent90.ciscoDelegateBag.android.activities.ViewVideoActivity"
android:label="#string/registerViewTitle"
android:screenOrientation="landscape"
android:configChanges="keyboardHidden|orientation" >
</activity>
It is working almost fine:
If I am in portrait, the view rotates as expected.
If I am already in landscape, can happen 2 things:
The view remain as it is. OK.
The view rotate 180 degrees. NOT OK
It is depending on if I have the front camera in the right or in the left. So it is like android only recognizes ONE landscape orientation.
Has anybody have this problem before? Any easy way to fix it?
Thanks.

Use
android:screenOrientation="sensorLandscape"
Refer <activity> documentation for values screenOrientation can take.

Can you try the following?
android:configChanges="keyboardHidden|orientation|screenSize"

Use screenSize if you are using minimum sdk version above 13.
If your application targets API level 13 or higher (as declared by the
minSdkVersion and targetSdkVersion attributes), then you should also
declare the "screenSize" configuration, because it also changes when a
device switches between portrait and landscape orientations.

Android recognizes only one rotation as landscape, the other, 180° degrees rotated "landscape" orientation is called "reverseLandscape", you can only use one of them, in fact, most of the apps that show videos only work in one orientation.
EDIT: try as Rajesh said "sensorLandscape"

Android activity not rotating on phones (but does on tablets)

I have an activity that does not rotate on some devices, but does rotate on others.
Specifically it rotates on tablets tested so far, but not on phones. My other activities with the same manifest parameters do rotate as expected.
This view has a viewpager as well as admob ads. Is there a known bug/feature with these layout elements that can override rotation parameters? I don't have anything saying the orientation should stick to landscape or portrait in the manifest or in the code.
If there isn't anything known, I can post code later.

The answer is that this theme
android:theme="#android:style/Theme.Translucent.NoTitleBar"
doesn't allow rotation on certain screen sizes

In manisfest insert the activity parameter android:configChanges="orientation" and not insert the screenOrientation parameter.

Lock screen orientation in android

I would like for my activity not to rotate when the device is turned.
Using
android:screenOrientation="nosensor"
does disable orientation changes, but with one caveat: the activity switches to portrait mode. I just want it to keep the current orientation (e.g., if the screen was in landscape when the activity was started, then stay in landscape mode even when the device is rotated). This is not what "nosensor" seems to be doing. It seems to simply be the exact same behavior as "portrait". Am I using it wrong?
I've tried using setRequestedOrientation( getRequestedOrientation ), but if the current requested orientation is undefined, then my activity is going to rotate. I just want too "lock" the effective screen rotation.

What you can do is to tell Android that you are going to handle the orientation configuration change on your own. You do it by specifying orientation for the android:configChanges attribute of the activity tag.
<activity android:name=".MyActivity"
android:configChanges="orientation"
android:label="#string/app_name">
See this link for more information.
http://developer.android.com/guide/topics/resources/runtime-changes.html#HandlingTheChange
As to why nosensor would not work, is because it's mentioned as below in the documentation.
The orientation is determined without reference to a physical
orientation sensor. The sensor is ignored, so the display will not
rotate based on how the user moves the device. Except for this
distinction, the system chooses the orientation using the same policy
as for the "unspecified" setting.
and as to what unspecified is in the documentation
The default value. The system chooses the orientation. The policy it
uses, and therefore the choices made in specific contexts, may differ
from device to device.

How to change the device orientation in android?

I am using a android phone for my development of a kiosk system. The handy uses as standard the portrait mode and will switch with the sensors to landscape if I rotate it to my needs. My problem is that this device programmed layout will do many side by side effekts in runtime because it will always switch to portrait and then remembers the sensor orientation and switches back to landscape. This means the implementation of portrait mode is not very comfortable for my development.
Now I saw in the dev tools the configuration app which shows me a device config:
orientation=1
My question is: Which file I have to edit to change the device orientation to standard landscape so that the above app will show me landscape. (phone is rooted)
I want to change global from phone portrait mode to tablet landscape mode and not only a single application!

What you need to do is edit your AndroidManifest.xml file and specify the orientation for your activity, as well as handle orientation changes yourself:
<activity android:name="MyActivity"
android:label="#string/app_name"
...
android:configChanges="orientation|keyboardHidden"
...
android:screenOrientation="landscape">
Then your activity will always run in a landscape mode regardless of the device orientation.
EDIT: If you want programmatically to enable/disable auto-rotation, then you can use this code:
public static void setAutoOrientationEnabled(ContentResolver resolver, boolean enabled)
{
Settings.System.putInt(resolver, Settings.System.ACCELEROMETER_ROTATION, enabled ? 1 : 0);
}
However note that this will affect all applications running on the device.

Hi is this what you are looking for? this would leave the application orientation as landscape.
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

This thread is 5 yrs old - am answering to help someone reached here later..
I guess every ans here talks about application specific orientation change. Here's what you should consider for changing orientation for the full device
Runtime: In /system/build.prop add:-
# Makes portrait only
persist.panel.orientation=90
To add in Build tree: Add same in
device/<vendor>/<processor>/system.prop

if you want to keep the orientation as landscape, add this in your Manifest.xml:
<activity android:name="MyActivity" android:screenOrientation="landscape"></activity>