Hello Android Example

activity_main.xml xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/root_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="16dp" > android:id="@+id/text_view"

activity_main.xml xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/coordinator_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#dbe5e9" >

activity_main.xml xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/coordinator_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#f2f1e9" >