How do I disable orientation change on Android

Question

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

User · Answer

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

User · Answer

Add  android configChanges  keyboardHidden orientation screenSize     to your manifest

User · Answer

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

User · Answer

Use this        android screenOrientation  portrait

User · Answer

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

User · Answer

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

User · Answer

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   gt    Or android screenOrientation  landscape

User · Answer

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

User · Answer

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    lt activity android name  MainActivity       android screenOrientation  portrait       android configChanges  keyboardHidden orientation  gt    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     lt activity     android name  MainActivity      android screenOrientation  portrait      android configChanges  keyboardHidden orientation screenSize  gt    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

User · Answer

I ve always found you need both   android screenOrientation  nosensor  android configChanges  keyboardHidden orientation

User · Answer

In your androidmanifest xml file       lt activity android name  MainActivity  android configChanges  keyboardHidden orientation  gt    or   Override public void onConfigurationChanged Configuration newConfig        super onConfigurationChanged newConfig       setRequestedOrientation ActivityInfo SCREEN ORIENTATION PORTRAIT

User · Answer

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  amp  amp            rotation    Surface ROTATION 0    rotation    Surface ROTATION 180              configuration orientation    Configuration ORIENTATION PORTRAIT  amp  amp             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

User · Answer

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

[android] How do I disable orientation change on Android?

Examples related to android

Examples related to android-activity

Examples related to android-orientation