title: Delete folder from internal storage in android?
body: <p>How to delete folder(contain some folder and file) from internal storage? Folder have some below tree.</p>
  
  <pre><code>folder
  |_________  C2 (folder)
               |________1 (folder)
                        |________1.gif
                        |________2.gif
                        |________3.gif
                        |________4.gif
               |________2 (folder)
                        |________1.gif
                        |________2.gif
                        |________3.gif
                        |________4.gif
               |________3 (folder)
                        |________1.gif
                        |________2.gif
                        |________3.gif
                        |________4.gif
               |________4 (folder)
                        |________1.gif
                        |________2.gif
                        |________3.gif
                        |________4.gif
               |________5 (folder)
                        |________1.gif
                        |________2.gif
                        |________3.gif
                        |________4.gif
  
  |_________  C2.xml (file)
  </code></pre>
  
  <p>I want to delete folder and containing all files </p>
  
  <pre><code>fil.delete();
  
  System.out.println("boolean =&gt;" + fil.delete());
  </code></pre>
  
  <p>but above code shows false. Please help.</p>