Develop Reference

How to lock android screen orientation

I'm making an Android video player.It has a function like that user can watch video in any orientation.I just use code as follow:
Settings.System.putInt(getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 1);
It works, but when I add a function that user can lock the orientation, I just did it:
Settings.System.putInt(getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 0);
So I met some trouble. when I'm in landscape orientation and try to lock the orientation, the screen just turns to portrait.
Can anyone solve it or tell me another way to do with it?

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
OR
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
More info here: Developing Orientation-Aware Android Applications

Use following code Based up on your condition change if else statement
int currentOrientation = getResources().getConfiguration().orientation;
if (currentOrientation == Configuration.ORIENTATION_LANDSCAPE)
{
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
}
else {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
}
or
you can set anyone landscape or portrait in your activity.its never change during the screen rotation
<activity android:name="MyActivity"
android:screenOrientation="landscape"
android:configChanges="keyboardHidden|orientation|screenSize">
...
</activity>

In your AndroidManifest.xml, for each activity put
android:screenOrientation="landscape"
It forces the activity to landscape.

just you have ot add following property in you manifest.xml file.
android:screenOrientation="portrait"
like this way,
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:screenOrientation="portrait" >
</activity>
That.sit

You can request ScreenOrinentation public void setRequestedOrientation (int requestedOrientation). You can use it like this
// For landscape
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
//OR for portrait
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
//OR reverse landscape
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
//OR for reverse portrait
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
requestedOrientation An orientation constant as used in ActivityInfo.screenOrientation.
Added in API level 1
The preferred screen orientation this activity would like to run in. From the screenOrientation attribute, one of SCREEN_ORIENTATION_UNSPECIFIED, SCREEN_ORIENTATION_LANDSCAPE, SCREEN_ORIENTATION_PORTRAIT, SCREEN_ORIENTATION_USER, SCREEN_ORIENTATION_BEHIND, SCREEN_ORIENTATION_SENSOR, SCREEN_ORIENTATION_NOSENSOR, SCREEN_ORIENTATION_SENSOR_LANDSCAPE, SCREEN_ORIENTATION_SENSOR_PORTRAIT, SCREEN_ORIENTATION_REVERSE_LANDSCAPE, SCREEN_ORIENTATION_REVERSE_PORTRAIT, SCREEN_ORIENTATION_FULL_SENSOR, SCREEN_ORIENTATION_USER_LANDSCAPE, SCREEN_ORIENTATION_USER_PORTRAIT, SCREEN_ORIENTATION_FULL_USER, SCREEN_ORIENTATION_LOCKED,

WebView not re sizing properly on orientation change

I am loading a video url into webview using webview.loadUrl(). The player is encoded in the html itself so I only have to load the url into web view.
In case if I dont give android:configChanges="orientation" in my manifest everything works fine. The webview resizes properly on orientation change and the video is adjusted to fit the screen properly, ofcourse then the video restarts.
Therefore I gave android:configChanges="orientation" in manifest so that the video doesnt reload. Now although the video doesn't reload and continues to play but the video/webview doesnt resize properly and half of the video goes off screen if the device was initially in portrait and then changed to landscape. In case the device was initially in landscape mode and then is changed to portrait mode only half of the screen is used.
Please reply if you can figure out a way or have any suggestions.

*if configchanges = "orientation" - not specified,*
the android system handles the change and restarts the layout, so layout is freshly created and video loads from start.
if android:configchanges = "orientation" , -
This tell the system that this activity will handle the orientation change by it self.
so,the android system will not load the layout refreshly . so video continues to play .The width of the parent layout will not change . so width in portrait mode is used in landscape . so , ur webview seems small.
you need to override the onconfigurationchanged () in activity and handle the orientation change.
You need to specify the layoutparams for layout.
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
Toast.makeText(this, "landscape", Toast.LENGTH_SHORT).show();
// for example the width of a layout
int width = 300;
int height = LayoutParams.WRAP_CONTENT;
WebView childLayout = (WebView) findViewById(R.id.webview);
childLayout.setLayoutParams(new LayoutParams(width, height));
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
}
}

Try:
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
webView.setLayoutParams(new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT));
}

Just add the following line to your activity in the manifest file:
<activity android:configChanges="orientation|screenSize">

facing same issue. and solve it with best way
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;
mWebview.setLayoutParams(new LinearLayout.LayoutParams(
width,
height-100));
}

As far as I can see, there must be some error in H5 page, similar resize problem
Just use other app (like chrome browser) test your url.

In fragments you have to use FrameLayout for WebView
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
int width = FrameLayout.LayoutParams.MATCH_PARENT;
int height = FrameLayout.LayoutParams.WRAP_CONTENT;
your_webview.setLayoutParams(new FrameLayout.LayoutParams(width, height));
}

My answer is very similar to the above, most closely to #Arash Sharif. This is the variant that worked for me.
Context: My app is a web app and uses only HTML, CSS and JavaScript. I run it as an app on Android by wrapping it in a WebView control. The app is designed to run full screen and I need it to resize when the screen gets reoriented.
I work in Android Studio. I am neither an Android nor Java programmer, so my explanation may not be in the right lingo but I am pretty sure it is valid.
First you need to tell Android that you will handle screen events.
AndoidManifest.xml
android:configChanges="orientation|screenSize|screenLayout|keyboardHidden">
<activity android:name="com.babyclix.babyclix_test.MainActivity"
android:configChanges="orientation|screenSize|screenLayout|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Now Android will pass screen events to you to handle, so you need to over-ride the function that handles screen events.
MainActivity.java
// For screen handling on changes (eg. reorientation, resizing)
import android.content.res.Configuration;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
// your stuff
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mywebview.setLayoutParams(new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
}
// more stuff

How to use onConfigurationChanged() and newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE in android 2.3.3

I am using onConfigurationChanged(). In that, when I am changing from LandScape to Portrait, it is calling if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) and shifting to Portrait from LandScape. But when I am changing from Portrait to Land-Scape, it is not changing to LandScape because it is calling if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) so, it is not changing from LandScape to Portrait.
Please help.
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
//int orientation = this.getResources().getConfiguration().orientation;
if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
Log.d("Entered to change as Portrait ","PPPPPPPPPPPPPPPPP");
setContentView(R.layout.settings);
} else if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
Log.d("Entered to change as LandScape ","LLLLLLLLLLLLLLLLLLLL");
setContentView(R.layout.settings);
}
}

Just write the below code into onConfigurationChanged method and test
if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
Log.e("On Config Change","LANDSCAPE");
}else{
Log.e("On Config Change","PORTRAIT");
}
and write the android:configChanges="keyboardHidden|orientation" into your manifiest file like this
<activity android:name="TestActivity"
android:configChanges="keyboardHidden|orientation">
it's working at my side, i hope it helps you.
If you're on tablet also add |screenSize to android:configChanges

you should also be aware of:
Caution: Beginning with Android 3.2 (API level 13), the "screen size"
also changes when the device switches between portrait and landscape
orientation. Thus, if you want to prevent runtime restarts due to
orientation change when developing for API level 13 or higher (as
declared by the minSdkVersion and targetSdkVersion attributes), you
must include the "screenSize" value in addition to the "orientation"
value. That is, you must decalare
android:configChanges="orientation|screenSize". However, if your
application targets API level 12 or lower, then your activity always
handles this configuration change itself (this configuration change
does not restart your activity, even when running on an Android 3.2 or
higher device).

The issue is with the android:configChanges="orientation|keyboardHidden" .
if you remove |keyboardHidden from the androidmanifest.xml, then the onConfigurationChanged is only fired when you rotate from landscape to portrait, not when you go from portrait to landscape (at least in the default emulator).
Hope this helps.

In addition to above answers: If you override the onConfigurationChanged method in combination with the updating of the manifest file you are saying you are handling the configurationchanges yourself. Therefore adding:
setContentView(R.layout.layout.xml);
In your onConfigurationChanged method - where layout is your layout file - will fix the problem.

Write below code in your activity file.
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
Log.e("On Config Change","LANDSCAPE");
}
else{
Log.e("On Config Change","PORTRAIT");
}
}
Also write below code in your manifest file as follows:
<activity
android:name=".activities.TestActivity"
android:configChanges="orientation|screenSize|keyboardHidden"
/>

Write this line in the android Manifest.xml file:
<activity
android:name="MyActivity"
android:configChanges="orientation|keyboardHidden" />

orientation is not working in 2.3.3?

I have prepared one application.My application will be supports both landscape and portrait.
When i change the orientation from portrait to landscape it is working fine,But when i change landscape to portrait it is not working.my code is,
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
System.out.println("orientation---"+getResources().getConfiguration().orientation);
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
setContentView(R.layout.main);
System.out.println("landscape-----");
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
setContentView(R.layout.main);
System.out.println("portrait-----");
}
}
Every time time it taking only landscape mode.I made mistake some where. please help.
System.out.println("orientation---"+getResources().getConfiguration().orientation);
The above SOP is printing 2 means landscape.Please help me.(i am using 2.3.3)

You might be hitting this bug "Orientation does not change from landscape to portrait on Emulator on 2.3"
More than 45 people are facing the same issue with the androidd 2.3 emulator
http://code.google.com/p/android/issues/detail?id=13189
Host OS: Windows 7 SDK tools version : revision 8 Eclipse version: 3.5
ADT plug-in version: 8.0.1 Platform targeted by your project: 2.3
Version of the platform running in the emulator:2.3
STEPS TO REPRODUCE:
1. Activity 1 (no screen orientation) - Activity 2 (screen orientation = landscape)
Going from Activity 1 to 2 works fine. Pressing back changes the orientation of Activity 1 to landscape
EXPECTED RESULTS: Activity 1 should be in portrait mode
OBSERVED RESULTS: Behavior is observed only in gingerbread, works as
expected on froyo.

The issue is with the android:configChanges="orientation|keyboardHidden" .
if you remove |keyboardHidden from the androidmanifest.xml, then the onConfigurationChanged is only fired when you rotate from landscape to portrait, not when you go from portrait to landscape (at least in the default emulator).
Hope this helps.
EDIT: DID some sample program to test it and works fine for me.
CheckOrientationActivity.java
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class CheckOrientationActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_layout);
Log.i("DayElevenActivity", "onCreate Start");
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
Log.i("DayElevenActivity", "onConfigurationChanged");
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
Log.i("ORIENTATION_LANDSCAPE", "ORIENTATION_LANDSCAPE");
Toast.makeText(getBaseContext(), "ORIENTATION_LANDSCAPE", Toast.LENGTH_SHORT).show();
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
Log.i("ORIENTATION_PORTRAIT", "ORIENTATION_PORTRAIT");
Toast.makeText(getBaseContext(), "ORIENTATION_PORTRAIT", Toast.LENGTH_SHORT).show();
}
}
}
In AndroidManifest.xml
<activity
android:label="#string/app_name"
android:configChanges="**orientation|keyboardHidden**"
android:name=".CheckOrientationActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Corresponding Logs when i run and change the orientation
03-05 18:54:31.644: I/CheckOrientationActivity (20314): onCreate Start
03-05 18:54:35.014: I/CheckOrientationActivity (20314): onConfigurationChanged
03-05 18:54:35.014: I/ORIENTATION_LANDSCAPE(20314): ORIENTATION_LANDSCAPE
03-05 18:54:41.984: I/CheckOrientationActivity (20314): onConfigurationChanged
03-05 18:54:41.984: I/ORIENTATION_PORTRAIT(20314): ORIENTATION_PORTRAIT

There's multiple reasons why this could happen, hard to tell without seing more code.
Here's some pointers:
you haven't forced the layout to some particular orientation via manifest file or programatically (something like <activity android:screenOrientation="portrait"> in your manifest)
by default the Activity is restarted when configuration changes happend. If you want to NOT have your activity restarted when the orientation changes, you need to use
android:configChanges="orientation"
on your activity's configuration in the manifest.
the above point will in fact make Android call your activity's onConfigurationChanged(Configuration) method when the orientation changes
==update==
Also, if you have the same layout (like "main") declared in layout-land and layout-port you only need to specify that you want to use that layout in the beginning:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
and that's it. THERE IS NO NEED to also implement the
public void onConfigurationChanged(Configuration newConfig) {
//...
}
method as well. For the sake of chosing the correct layout based on orientation all you have to do is declare the same layout in those two folders.
(Also, there is NO NEED to add the android:configChanges="orientation" to your manifest, apparently it's on by default). I've tried all this just now, works ok

How do I disable orientation change on Android?

I have an application that I just would like to use in portrait mode, so I have defined
android:screenOrientation="portrait" in the manifest XML. This works OK for the HTC Magic phone (and prevents orientation changes on other phones as well).
But I have a problem with the HTC G1 phone as I open the hardware QWERTY keyboard (not the virtual keyboard). My activity stays in portrait mode, but it seems to get restarted and loses all its states. This does not happen with the HTC Hero version.
My application is quite big, so I don't want it to restart and lose all its states when the keyboard is opened. How can I prevent that?

Update April 2013: Don't do this. It wasn't a good idea in 2009 when I first answered the question and it really isn't a good idea now. See this answer by hackbod for reasons:
Avoid reloading activity with asynctask on orientation change in android
Add android:configChanges="keyboardHidden|orientation" to your AndroidManifest.xml. This tells the system what configuration changes you are going to handle yourself - in this case by doing nothing.
<activity android:name="MainActivity"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation">
See Developer reference configChanges for more details.
However, your application can be interrupted at any time, e.g. by a phone call, so you really should add code to save the state of your application when it is paused.
Update: As of Android 3.2, you also need to add "screenSize":
<activity
android:name="MainActivity"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation|screenSize">
From Developer guide Handling the Configuration Change Yourself
Caution: Beginning with Android 3.2 (API level 13), the "screen size"
also changes when the device switches between portrait and landscape
orientation. Thus, if you want to prevent runtime restarts due to
orientation change when developing for API level 13 or higher (as
declared by the minSdkVersion and targetSdkVersion attributes), you
must include the "screenSize" value in addition to the "orientation"
value. That is, you must declare
android:configChanges="orientation|screenSize". However, if your
application targets API level 12 or lower, then your activity always
handles this configuration change itself (this configuration change
does not restart your activity, even when running on an Android 3.2 or
higher device).

You need to modify AndroidManifest.xml as Intrications (previously Ashton) mentioned and make sure the activity handles the onConfigurationChanged event as you want it handled. This is how it should look:
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}

I've always found you need both
android:screenOrientation="nosensor" android:configChanges="keyboardHidden|orientation"

As said, set android:configChanges of your Activity (in manifest file) to keyboardHidden|orientation and then:
1) Override onConfigurationChanged()
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
//here you can handle orientation change
}
2) Add this line to your activity's onCreate()
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
It's better than add same line to onConfigurationChanged, because your app will turn to portrait mode and then back to landscape (it will happen only one time, but it's annoying).
Also you can set android:screenOrientation="nosensor" for your activity (in manifest). But using this way you're a not able to handle orientation changes at all.

Use this..
android:screenOrientation="portrait"

In OnCreate method of your activity use this code:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
Now your orientation will be set to portrait and will never change.

In the AndroidManifest.xml file, for each activity you want to lock add the last screenOrientation line:
android:label="#string/app_name"
android:name=".Login"
android:screenOrientation="portrait" >
Or android:screenOrientation="landscape".

In your androidmanifest.xml file:
<activity android:name="MainActivity" android:configChanges="keyboardHidden|orientation">
or
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}

To lock the screen by code you have to use the actual rotation of the screen (0, 90, 180, 270) and you have to know the natural position of it, in a smartphone the natural position will be portrait and in a tablet, it will be landscape.
Here's the code (lock and unlock methods), it has been tested in some devices (smartphones and tablets) and it works great.
public static void lockScreenOrientation(Activity activity)
{
WindowManager windowManager = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);
Configuration configuration = activity.getResources().getConfiguration();
int rotation = windowManager.getDefaultDisplay().getRotation();
// Search for the natural position of the device
if(configuration.orientation == Configuration.ORIENTATION_LANDSCAPE &&
(rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180) ||
configuration.orientation == Configuration.ORIENTATION_PORTRAIT &&
(rotation == Surface.ROTATION_90 || rotation == Surface.ROTATION_270))
{
// Natural position is Landscape
switch (rotation)
{
case Surface.ROTATION_0:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_90:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_180:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
case Surface.ROTATION_270:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
}
}
else
{
// Natural position is Portrait
switch (rotation)
{
case Surface.ROTATION_0:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Surface.ROTATION_90:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_180:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_270:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
}
}
}
public static void unlockScreenOrientation(Activity activity)
{
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}

Add
android:configChanges="keyboardHidden|orientation|screenSize"
to your manifest.

In Visual Studio Xamarin:
Add:
using Android.Content.PM; to you activity namespace list.
Add:
[Activity(ScreenOrientation = Android.Content.PM.ScreenOrientation.Portrait)]
as an attribute to you class, like that:
[Activity(ScreenOrientation = ScreenOrientation.Portrait)]
public class MainActivity : Activity
{...}

You can simply use like below in the application class if you want only PORTRAIT mode for all activities in your app.
class YourApplicationName : Application() {
override fun onCreate() {
super.onCreate()
registerActivityLifecycleCallbacks(object : ActivityLifecycleCallbacks {
override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
}
override fun onActivityStarted(activity: Activity) {
}
override fun onActivityResumed(activity: Activity) {
}
override fun onActivityPaused(activity: Activity) {
}
override fun onActivityStopped(activity: Activity) {
}
override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
}
override fun onActivityDestroyed(activity: Activity) {
}
})
}
}

Please note, none of the methods seems to work now!
In Android Studio 1 one simple way is to add
android:screenOrientation="nosensor".
This effectively locks the screen orientation.