How to detect orientation change in layout in Android

Question

I just implemented a orientation change feature - e g  when the layout changes from portrait to landscape  or vice versa   How can I detect when the orientation change event finished   The OrientationEventListener didn t work  How can I get notifications about layout orientation change events

User · Answer

for Kotilin implementation in the simplest form - only fires when screen changes from portrait  lt --  landscape if need device a flip detection  180 degree  you ll need to tab in to gravity sensor values  override fun onCreate savedInstanceState  Bundle         super onCreate savedInstanceState      setContentView R layout activity main   val rotation   windowManager defaultDisplay rotation      when  rotation                        0 - gt  Log d TAG  at zero degree           1 - gt  Log d TAG  at 270 degree           2 - gt  Log d TAG  at 180 degree           3 - gt  Log d TAG  at 90 degree

User · Answer

use this method   Override public void onConfigurationChanged Configuration newConfig        super onConfigurationChanged newConfig       if  newConfig orientation    Configuration ORIENTATION PORTRAIT                Toast makeText getActivity    PORTRAIT  Toast LENGTH LONG  show             add your code what you want to do when screen on PORTRAIT MODE           else if  newConfig orientation    Configuration ORIENTATION LANDSCAPE                Toast makeText getActivity    LANDSCAPE  Toast LENGTH LONG  show              add your code what you want to do when screen on LANDSCAPE MODE          And Do not forget to Add this in your Androidmainfest xml  android configChanges  orientation screenSize    like this   lt activity android name   MainActivity            android theme   style Theme AppCompat NoActionBar            android configChanges  orientation screenSize  gt        lt  activity gt

User · Answer

Override activity s method onConfigurationChanged

User · Answer

Use the onConfigurationChanged method of Activity  See the following code   Override public void onConfigurationChanged  NotNull Configuration newConfig        super onConfigurationChanged newConfig           Checks the orientation of the screen     if  newConfig orientation    Configuration ORIENTATION LANDSCAPE            Toast makeText this   quot landscape quot   Toast LENGTH SHORT  show          else if  newConfig orientation    Configuration ORIENTATION PORTRAIT           Toast makeText this   quot portrait quot   Toast LENGTH SHORT  show             You also have to edit the appropriate  element in your manifest file to include the android configChanges Just see the code below   lt activity android name  quot  MyActivity quot            android configChanges  quot orientation keyboardHidden quot            android label  quot  string app name quot  gt   NOTE  with Android 3 2  API level 13  or higher  the  quot screen size quot  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  you must declare android configChanges  quot orientation screenSize quot  for API level 13 or higher  Hope this will help you

User · Answer

Create an instance of OrientationEventListener class and enable it   OrientationEventListener mOrientationEventListener   new OrientationEventListener YourActivity this         Override     public void onOrientationChanged int orientation            Log d TAG  orientation       orientation             if  mOrientationEventListener canDetectOrientation        mOrientationEventListener enable

User · Answer

If accepted answer doesn t work for you  make sure you didn t define in manifest file   android screenOrientation  portrait    Which is my case

User · Answer

Just wanted to show you a way to save all your Bundle after onConfigurationChanged   Create new Bundle just after your class   public class MainActivity extends Activity       Bundle newBundy   new Bundle      Next  after  protected void onCreate  add this    Override public void onConfigurationChanged Configuration newConfig         super onConfigurationChanged newConfig        if  newConfig orientation    Configuration ORIENTATION LANDSCAPE                onSaveInstanceState newBundy             else if  newConfig orientation    Configuration ORIENTATION PORTRAIT                onSaveInstanceState newBundy                 Override public void onSaveInstanceState Bundle outState        super onSaveInstanceState outState       outState putBundle  newBundy   newBundy       Override protected void onRestoreInstanceState Bundle savedInstanceState        super onRestoreInstanceState savedInstanceState       savedInstanceState getBundle  newBundy        If you add this all your crated classes into MainActivity will be saved   But the best way is to add this in your AndroidManifest    lt activity name    MainActivity  android configChanges  orientation screenSize   gt

User · Answer

I just want to propose another alternative that will concern some of you  indeed  as explained above    android configChanges  orientation keyboardHidden     implies that we explicitly declare the layout to be injected    In case we want to keep the automatic injection thanks to the layout-land and layout folders  All you have to do is add it to the onCreate       if  getResources   getConfiguration   orientation    Configuration ORIENTATION LANDSCAPE            getSupportActionBar   hide           else if  getResources   getConfiguration   orientation    Configuration ORIENTATION PORTRAIT            getSupportActionBar   show            Here  we display or not the actionbar depending on the orientation of the phone

User · Answer

In case this is of use to some newer dev s because its not specified above  Just to be very explicit   You need two things if using onConfigurationChanged    An onConfigurationChanged method in your Activity Class Specify in your manifest which configuration changes will be handled by your onConfigurationChanged method   The manifest snippet in the above answers  while no doubt correct for the particular app that manifest belongs to  is NOT exactly what you need to add in your manifest to trigger the onConfigurationChanged method in your Activity Class  i e  the below manifest entry may not be correct for your app    lt activity name    MainActivity  android configChanges  orientation screenSize   gt    In the above manifest entry  there are various Android actions for android configChanges    which can trigger the onCreate in your Activity lifecycle   This is very important - The ones NOT Specified in the manifest are the ones that trigger your onCreate and The ones specified in the manifest are the ones that trigger your onConfigurationChanged method in your Activity Class   So you need to identify which config changes you need to handle yourself  For the Android Encyclopedically Challenged like me  I used the quick hints pop-out in Android Studio and added in almost every possible configuration option  Listing all of these basically said that I would handle everything and onCreate will never be called due to configurations    lt activity name    MainActivity  android configChanges  screenLayout touchscreen mnc mcc density uiMode fontScale orientation keyboard layoutDirection locale navigation smallestScreenSize keyboardHidden colorMode screenSize   gt    Now obviously I don t want to handle everything  so I began eliminating the above options one at a time  Re-building and testing my app after each removal   Another important point  If there is just one configuration option being handled automatically that triggers your onCreate  You do not have it listed in your manifest above   then it will appear like onConfigurationChanged is not working  You must put all relevant ones into your manifest   I ended up with 3 that were triggering onCreate originally  then I tested on an S10  and I was still getting the onCreate  so I had to do my elimination exercise again and I also needed the  screenSize  So test on a selection of platforms    lt activity name    MainActivity  android configChanges  screenLayout uiMode orientation screenSize   gt    So my suggestion  although I m sure someone can poke holes in this    Add your onConfigurationChanged method in your Activity Class with a TOAST or LOG so you can see when its working  Add all possible configuration options to your manifest  Confirm your onConfigurationChanged method is working by testing your app  Remove each config option from your manifest file one at a time  testing your app after each  Test on as large a variety of devices as possible  Do not copy paste my snippet above to your manifest file  Android updates change the list  so use the pop-out Android Studio hints to make sure you get them all    I hope this saves someone some time   My onConfigurationChanged method just for info below  onConfigurationChanged is called in the lifecycle after the new orientation is available  but before the UI has been recreated  Hence my first if to check the orientation works correctly  and then the 2nd nested if to look at the visibility of my UI ImageView also works correctly        Override     public void onConfigurationChanged Configuration newConfig            super onConfigurationChanged newConfig               Checks the orientation of the screen         if  newConfig orientation    Configuration ORIENTATION LANDSCAPE                pokerCardLarge   findViewById R id pokerCardLgImageView                if pokerCardLarge getVisibility      pokerCardLarge VISIBLE                   Bitmap image     BitmapDrawable pokerCardLarge getDrawable    getBitmap                    pokerCardLarge setVisibility pokerCardLarge VISIBLE                   pokerCardLarge setImageBitmap image                            else if  newConfig orientation    Configuration ORIENTATION PORTRAIT               pokerCardLarge   findViewById R id pokerCardLgImageView                if pokerCardLarge getVisibility      pokerCardLarge VISIBLE                   Bitmap image     BitmapDrawable pokerCardLarge getDrawable    getBitmap                    pokerCardLarge setVisibility pokerCardLarge VISIBLE                   pokerCardLarge setImageBitmap image

User · Answer

For loading the layout in layout-land folder means you have two separate layouts then you have to make setContentView in onConfigurationChanged method    Override public void onConfigurationChanged Configuration newConfig        super onConfigurationChanged newConfig           Checks the orientation of the screen     if  newConfig orientation    Configuration ORIENTATION LANDSCAPE            setContentView R layout yourxmlinlayout-land         else if  newConfig orientation    Configuration ORIENTATION PORTRAIT           setContentView R layout yourxmlinlayoutfolder             If you have only one layout then no necessary to make setContentView in This method  simply   Override public void onConfigurationChanged Configuration newConfig        super onConfigurationChanged newConfig

[android] How to detect orientation change in layout in Android?

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