How to show Android Activity as a dialog in Android

we can apply a dialog theme to an activity so that it is displayed as a floating dialog.

To apply a dialog theme to an activity, just modify the <Activity> element in the AndroidManifest.xml file by adding the android:theme attribute(android:theme="@android:style/Theme.Dialog") to the Activity.


 In Manifest file just add one simple attribute to show activity as a dialog.

 <activity
android:label="@string/app_name"
android:name=".Activity"
android:theme="@android:style/Theme.Dialog"  />

Then here we got one doubt how to close this activity dialog? 

solution is just call finish( ) method to close the activity dialog.

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