activity_main.xml

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawerLayout"
    
    android:layout_width="match_parent"
    android:layout_height="match_parent">

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#4C4C4C"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:textSize="35dp"
        android:textColor="#FF9900"
        android:layout_marginTop="70dp"
        android:layout_gravity="center"
        android:layout_height="wrap_content"
        android:text="Send an Alert"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_marginTop="15dp"
        android:textColor="#FF9900"
        android:layout_gravity="center"
        android:layout_height="wrap_content"
        android:text="Press the button to send alert messages"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <Button
        android:id="@+id/button1"
        android:layout_marginTop="80dp"
        
        android:layout_gravity="center"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:text="" />
    <!-- android:background="@drawable/alert1" -->

    <Button
        android:id="@+id/button2"
        android:background="@drawable/edit_contact"
        android:layout_marginLeft="20dp"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginTop="20dp"
        android:text="B" />

    <Button
        android:id="@+id/button3"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginLeft="80dp"
        android:background="@drawable/people"
        android:text="B" />
    
    <LinearLayout 
        
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    
    android:orientation="horizontal" >

    <Button
        android:id="@+id/button4"
        
        android:layout_marginLeft="20dp"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:text="b" />

    <Button
        android:id="@+id/button5"
        android:background="@drawable/locate"
        android:layout_marginLeft="50dp"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:text="B" />
    
    </LinearLayout>

</LinearLayout>

<FrameLayout
        android:id="@+id/mainContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    
    
    <!-- The navigation drawer -->
    <ListView android:id="@+id/drawerList"
      
        
        android:layout_width="240dp"
        android:layout_height="match_parent"
       
        android:layout_gravity="left"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#11ff9900"/>
</android.support.v4.widget.DrawerLayout>



<!-- android:background="@drawable/loc_sett" -->