Problem is I am using TTS to read a long string message when my activity is launched, but TalkBack automatically reads the application name in the middle of it and cuts the long
For Preventing TalkBack to read the application Name every time you switch activity is to set a name (label) of the Activity in Manifest:
Adding android:name="" to Manifest will stop TalkBack announcing the name of the App every time you switch Activities.
android:name=""