Download Andriod SDK from http://developer.android.com/sdk/index.html#top
Download Java for OS-X https://support.apple.com/kb/DL1572?viewlocale=en_US&locale=en_US
On Android Studio
Expand res->layout->content_main.xml
<TextView android:text="My First App" android:layout_width="wrap_content" android:layout_height="wrap_content" />
Exapnd res->values-> strings.xml (All App name)
<string name="app_name">Hello App</string>
Download Java for OS-X https://support.apple.com/kb/DL1572?viewlocale=en_US&locale=en_US
On Android Studio
Expand res->layout->content_main.xml
<TextView android:text="My First App" android:layout_width="wrap_content" android:layout_height="wrap_content" />
Exapnd res->values-> strings.xml (All App name)
<string name="app_name">Hello App</string>