title: Android creating AlertDialog using values from ArrayList?
body: <p>I am using following code to create a Dialog aleart box with lists item from studentNames ArrayList.I am creating this ArrayList by reading childfile array.But when this code runs it just display a Dialog box with zero list item.I have even check my studentNames for null but it has values in it.According to documentation I need to set ListAdapter for showing list items in Dialog box , but that's also not working for me.Please help me finding the problem.</p>
  
  <pre><code>ArrayList&lt;String&gt; studentNames  = new ArrayList&lt;String&gt;();
              for (File file2 : childfile) {
                  studentNames.add(file2.getName());
              }
  
      AlertDialog.Builder builder = new AlertDialog.Builder(context);
              builder.setTitle(student.getName()).setAdapter(new ArrayAdapter(context, android.R.layout.simple_list_item_1, studentNames),
                      new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog, int which) {
  
                              switch (which) {
  
                                 cases
                              }
  
                          }
                      });
              builder.create();
              builder.show();
  </code></pre>