How to keep dialog showing on orientation change?

Question

I have an activity which inflates a listview. On list item click a dialog is opened(it is handled in the corresponding list adapter.) On orientation change the showing dialog (if any) is disappeared (as expected.) What I want is the showing dialog not to dismiss on orientation change and I don't have an idea how to cleanly handle it.

Answer 1

When you rotate the phone, your activity is actually destroyed and recreated. This includes your dialog. Yes, its quite possibly the stupidest design decision in history, but we're stuck with it. There are two ways to fix it:

1) Turn off this "helpful" functionality. If you don't have different layouts for landscape and portrait its what I'd suggest. Add android:configChange="orientation|resize" to your activity in the manifest.

2) Implement onSaveInstanceState/onRestoreInstanceState and have a variable that says whether or not you need to recreate and relaunch the dialog.

Answer 2

You can disable the orientation changing in the androidManifest.xml file

<activity
        android:name="com.example.deneme"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        *************android:screenOrientation="landscape" >*******************
</activity>

OR

you can do it before dialog is show

setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

after dialog is show

setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);