AutoCompleteTextView not showing suggestion

I am trying to create an application for android in which I want to keep `AutoCompleteTextView` to show suggestion to reduce the efforts of users. Currently I am testing with a small code I wrote but I am not getting suggestions. I am putting up the code, Please help me to find the error. ``` public class MainActivity extends Activity { private ArrayList<Map<String, String>> objects; private AutoCompleteTextView autotextView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); autotextView = (AutoCompleteTextView) findViewById(R.id.autocompleteView); objects = new ArrayList<Map<String, String>>(); Map<String, String> NamePhoneType = new HashMap<String, String>(); NamePhoneType.put("Name", "John"); NamePhoneType.put("Phone", "1234567890"); objects.add(NamePhoneType); NamePhoneType.put("Name", "Steve"); NamePhoneType.put("Phone", "4567890123"); objects.add(NamePhoneType); ArrayAdapter<Map<String, String>> am = new ArrayAdapter<Map<String, String>>( this, R.layout.list_item, objects); autotextView.setAdapter(am); } } ``` list_item.xml ``` <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/ccontName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Name" android:textAppearance="?android:attr/textAppearanceLarge" android:textColor="#A5000000" /> <TextView android:id="@+id/ccontNo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/ccontName" android:text="Phone" android:textAppearance="?android:attr/textAppearanceMedium" android:textColor="#A5000000" /> </RelativeLayout> ```