How to show Android app name on ActionBar of each Activity?

Issue

I'm working right now on my first great app! Where tm-s is, I want to have Hello world for each Activity. Is it possible?

Solution

Use the following

android:label="@string/app_name"

for each activity and application tag of AndroidManifest.xml. The string resource app_name should reside in res/values/strings.xml:

<string name="app_name">Hello world!</string>

Answered By - Onik