In the AndroidManifest.xml, there should be an <application>
tag with a android:name
attribute. This is where you set the name which appears below the icon in the device's launcher. You will also see that each <activity>
tag has a android:label
attribute. This is the text which is shown in the tool bar when that activity is active. Both of these attributes can be set using a string resource. This allows you to make a single change to your code in order to update both places where the string is displayed. It also allows you to provide translations in other languages.
If you make these changes and they still stay the same when you run your app from Android Studio, you should turn off Instant Run.