Same Activity Is Created Twice If You Open From Another App

If you have an APP open in Activity B and you use APP(2) to open the same Activity it will create another instance of Activity B and now you will have 2 Activities B. Is there any

Solution 1:

yes in your manifest use launchMode:singleTask in your activity tag

<activityandroid:name=".MainActivity"android:launchMode="singleTask">
         -------------- Your Activity---------
 <activity/>

Solution 2:

use in your andorid manifest to make sure that only one instance of activity is created

Solution 3:

Use android:launchMode="singleInstance" for activity in AndroidManifest And override onNewIntent in activity to get data when new startActivity() called

Solution 4:

Following guide you should add following flag into starting intent:

FLAG_ACTIVITY_NEW_TASK

Solution 5:

Use below flag before startActivity

Intent intent = newIntent(this, MyActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);

And add android:launchMode="singleTask" for activity tag in your manifest file.