title: How to prevent deleting the first character of edit text in Android
body: <p>This is one of my Edit text in the application </p>
  
  <pre><code>&lt;EditText
          android:id="@+id/etFolder"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="/pictures"
          android:ems="10" &gt;
  </code></pre>
  
  <p>When it appear at first time it comes with "/pictures" </p>
  
  <p>User can change the text and enter another word. but how to prevent deleting  "/" of Edit text.</p>
  
  <p>user can delete all other text but should not allow to delete first character.</p>
  
  <p>How can I achieve this behavior ?</p>