title: AutoCompleteTextView doesn't show any dropdown
body: <p>I try to implement AutoCompleteTextView with Custom Adapter, but it doesn't show me suggestion list.</p>
  
  <p>This is snippet of my activity:</p>
  
  <pre><code>Member newMember = new Member();
  newMember.setMemberID(1);
  newMember.setMemberName("TEST 1");
  mAllMemberList.add(newMember);
  newMember = new Member();
  newMember.setMemberID(2);
  newMember.setMemberName("TEST 2");
  mAllMemberList.add(newMember);
  
  mMemberInputField = (AutoCompleteTextView) findViewById(R.id.memberInputField);
  mAllMemberListAdapter = new MemberInputListAdapter(this, mAllMemberList);
  mMemberInputField.setAdapter(mAllMemberListAdapter);
  </code></pre>
  
  <p>MemberInputListAdapter.java</p>
  
  <pre><code>public class MemberInputListAdapter extends ArrayAdapter&lt;Member&gt; {
      private Context mContext;
      private ArrayList&lt;Member&gt; mMembers = new ArrayList&lt;Member&gt;();
  
      public GroupMemberInputListAdapter(Context context, ArrayList&lt;Member&gt;members) {
          super(context, R.layout.all_member_listview_item, members);
          mContext = context;
          mMembers = members;
      }
  
      @Override
      public View getView(final int rowPosition, View convertView, ViewGroup parent) {
          LayoutInflater inflater = (LayoutInflater) mContext
              .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  
          View rowView = inflater.inflate(R.layout.all_member_listview_item, parent, false);          
          return rowView;
      }
  }
  </code></pre>
  
  <p>Member.java</p>
  
  <pre><code>public class Member implements Serializable{
      private int memberID;
      private String memberName;
  
      public int getMemberID() {
          return memberID;
      }
      public void setMemberID(int memberID) {
          this.memberID = memberID;
      }
      public String getMemberName() {
          return memberName;
      }
      public void setMemberName(String memberName) {
          this.memberName = memberName;
      }
  
      @Override
      public String toString() {
          return memberName;
      }
  }
  </code></pre>
  
  <p>Is there anything I miss that my <code>AutoCompleteTextView</code> doesn't show my anything when I start to type "Tes"?</p>