Application should not display in recent app list after finish the activity if app was not displaying recent app list previously

Question

Step 1- Application is not exist in recent app list (App has been removed from recent app list).
Step 2- As soon as I got notification open IncomingCall activity, User a

Answer 1

Add

android:excludeFromRecents="true" 

to the activity tag of your launcher activity in AndroidManifest.xml file

<activity
    android:name=".MainActivity"
    android:label="@string/app_name"
    android:excludeFromRecents="true">
....
</activity>

Answer 2

Thanks God, I got answer after wondering a week. Add singleInstance attribute along with exclude from recent. It was a bug in 5.0 now has been resolved in 5.1

 <activity
        android:name="activityName"
        android:excludeFromRecents="true"
        android:launchMode="singleInstance"
         >
 </activity>

Answer 3

As per you needs, finishAndRemoveTask() is the new API that as per the documentation

Finishes all activities in this task and removes it from the recent tasks list.

if(android.os.Build.VERSION.SDK_INT >= 21)
{
    finishAndRemoveTask();
}
else
{
    finish();
}