title: How to implement the Android ActionBar back button?
body: <p>I have an activity with a listview. When the user click the item, the item "viewer" opens:</p>
  
  <pre><code>List1.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView&lt;?&gt; arg0, View arg1, int arg2,long arg3) {
  
          Intent nextScreen = new Intent(context,ServicesViewActivity.class);
          String[] Service = (String[])List1.getItemAtPosition(arg2);
  
          //Sending data to another Activity
          nextScreen.putExtra("data", datainfo);
          startActivityForResult(nextScreen,0);
          overridePendingTransition(R.anim.right_enter, R.anim.left_exit);
      }
  });
  </code></pre>
  
  <p>This works fine, but on the actionbar the back arrow next to the app icon doesn't get activated. Am I missing something?</p>