how to stop activity recreation on screen orientation?

Question

how i can stop the restarting or recalling of on create() on screen orientation ,i want to stop the recreation of activity on screen orientation. thanks in advance please tell me any better solution its really creating a problem. like in my program i am selecting some picture but on screen orientation the image goes off so thats why i want to stop the recreation of activity on screen orientation.

enter code here
public void onCreate(Bundle savedInstanceState) 
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mainwindow);
    Toast.makeText(getApplicationContext(),"a", 1).show();

    bitmap = (Bitmap)getLastNonConfigurationInstance();
    //Toast.makeText(getApplicationContext(),"a1", 1).show();

    if (savedInstanceState != null) 
    {
        bitmap=BitmapFactory.decodeFile(mImageCaptureUri.getPath());
        Toast.makeText(getApplicationContext(),"preview have value", 1).show();
        preview.setVisibility(View.VISIBLE);
        From_Folder.setVisibility(View.GONE);
        From_Camera.setVisibility(View.GONE);
        preview.setImageBitmap(bitmap);


    }

score 31 · Answer 1 · edited Jul 01 '14 at 09:02

31

Up to API 13 there was a new value to the configChanges attribute, screenSize

So if you're using large screens make sure to add screenSize in your configChanges attribute:

    android:configChanges="orientation|keyboardHidden|screenSize"

edited Jul 01 '14 at 09:02

Parag Chauhan

35,760
13
86
95

answered Aug 17 '12 at 23:36

Thomas Gatt

849
9
9

2

it's enough only two parameters android:configChanges="orientation|screenSize" – Volodymyr Oct 08 '14 at 11:55
`screenLayout` is also needed to prevent layout changes – Atiq Mar 16 '19 at 11:21

score 11 · Answer 2 · answered Jan 11 '12 at 05:34

This is happening because when screen orientation rotates the Activity gets re-started. In this case you can add configChanges attribute in your tag in the AndroidManifest file to stop the re-creation of the Activity.

<activity android:name=".Activity_name"
          android:configChanges="orientation|keyboardHidden">

By, this also it won't stop though the orientation changes.

@Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        if(newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE){
            setContentView(R.layout.login_landscape);
        }
        else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
            setContentView(R.layout.login);         
        }
    }

Thanks, this was a great solution for maintaining dialogs on orientation change — rwarner, Jul 16 '12 at 23:57
in API 13 must incluse also the `screenSize` value to manifest http://stackoverflow.com/questions/11630530/how-to-handle-screen-orientation-changes-when-there-is-an-asyntask-running-with — sabadow, Apr 05 '13 at 08:09

score 5 · Answer 3 · answered Jan 11 '12 at 06:17

5

In your AndroidManifest.xml file, in the activity add

android:configChanges="keyboardHidden|orientation"

Example as below:

 <activity android:name=".YourActivity" android:label="@string/app_name" android:configChanges="keyboardHidden|orientation">

answered Jan 11 '12 at 06:17

Mohit Verma

3,025
1
20
36

1

yes it is working after adding these lines to my manifestandroid:configChanges="keyboardHidden|orientation" it is working 100% – ravi Jan 26 '12 at 06:06

score 3 · Answer 4 · answered Jan 11 '12 at 05:24

3

Not the best, but maybe the easiest solution is to add

android:configChanges="keyboardHidden|orientation"

to youractivity in your manifest so it looks like

<activity android:name="com.your.activity"
      android:configChanges="keyboardHidden|orientation"/>

answered Jan 11 '12 at 05:24

mseo

3,881
3
22
26

1

This is an anti-pattern and must be discouraged. You HAVE to manage the scenario where activity is recreated, since it happens not only when the device is rotated, but when the SO kills activity to release memory. Manage your layout configuration changes and activity recreation using Loaders or ViewModel and Lifecycle components. – Alexander Haroldo da Rocha Mar 17 '18 at 19:05

Webest · Answer 5 · 2015-05-15T15:41:36.743

2

There are a more full list of parameters for prevent activity recreations (in Manifest.xml):

<activity 
    android:name = ".MyActivity" 
    android:configChanges = "orientation|keyboard|keyboardHidden|screenLayout|screenSize">
</activity>

edited May 15 '15 at 15:41

answered May 15 '15 at 15:34

Webest

51
4

score 0 · Answer 6 · answered Jan 11 '12 at 05:39

Two ways for this:

Either you can set android:configChanges="keyboardHidden|orientation" in Manifest file to avoid recreation of activity.

Or Make the changes you want to apply on changing the orientation inside the overrided method

@Override

public void onConfigurationChanged(Configuration newConfig) {

            // Perform the actions

    super.onConfigurationChanged(newConfig);

}

score -3 · Answer 7 · answered Jan 11 '12 at 05:34

Add

android:orientation="vertical"

or

android:orientation="horizontal"

to your layout in mainwindow.xml.

Example:::

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

No need to add anything in Activity class.

Hope this may help you

how to stop activity recreation on screen orientation?

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