Android : How to change the Android Application Label in Action Bar

Points To Remember

Android saves the Application level Settings like App Icon, App Label etc in the AndroidManifest.xml file.

How to change the Android Application Icon 

Go to the Application > manifests > AndroidManifests.xml file and look for the following lines.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ekiras.activity" >

    <application
        android:allowBackup="true"
        android:icon="@drawable/icon"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        // Your activities are declared here
        <activity></activity>
    </application>

</manifest>

You can set the Application icon in strings.xml by name app_name in the values folder.

<resources>
    <string name="app_name">Ekiras</string>
    <string name="action_settings">Settings</string>
</resources>

If you do not want to keep them in strings.xml file then you can simple assign them in AndroidManifests.xml file , however it is recommended that you keep them in strings.xml file.