title: How to set transparency of a background image Android xml file
body: <p>I have put an image in as the background of my android application with the following line of code:</p>
  
  <pre><code> android:background="@drawable/background"
  </code></pre>
  
  <p>I now want to make it transparent by 40% but how is this possible within the xml file? My exm file is shown below:</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@drawable/background"
  android:alpha="0.6"
  android:orientation="vertical"
  android:padding="30dp"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".SecondActivity" &gt;
  
  &lt;TextView
      android:id="@+id/textView1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:paddingBottom="5dp"
      android:text="Welcome"
      android:textColor="#292421"
      android:textSize="17sp"
      android:textStyle="bold" /&gt;
  
  &lt;TextView
      android:id="@+id/TextView01"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:gravity="center_vertical"
      android:text="This Android application is used to track and record the movements of a person throughout the university of ulster, Magee Campus. The tracking phase of the application can only be initiated whilst within the campus and off campus tracking is unavailable at this moment in time."
      android:textColor="#292421"
      android:textSize="17sp" /&gt;
  
  &lt;LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content" &gt;
  
      &lt;Button
          android:id="@+id/button1"
          android:layout_width="fill_parent"
          android:layout_height="match_parent"
          android:layout_marginTop="85dp"
          android:layout_weight="1"
          android:background="#E6E6FA"
          android:onClick="tracking"
          android:text="@string/tracking_service" /&gt;
  
      &lt;LinearLayout
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          android:padding="20dp" &gt;
  
      &lt;/LinearLayout&gt;
  
      &lt;Button
          android:id="@+id/button2"
          android:layout_width="fill_parent"
          android:layout_height="match_parent"
          android:layout_marginTop="85dp"
          android:layout_weight="1"
          android:background="#E6E6FA"
          android:onClick="help"
          android:text="Help" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p></p>