Android Studio 自动提示文本框

自动提示文本框:
AutoCompleteTextView(单一提示)
android:completionThreshold=”1”

activity_main.xml类:

<AutoCompleteTextView
android:id="@+id/act_main_cat1"
android:layout_width="match_parent"
android:layout_height="60dp" />

在layout创一个类：名为act_main_item1:

        <TextView
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:textColor="@color/red"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </TextView>

MainActivity：

    protected void onCreate(Bundle savedInstanceState) {
    private String[] data1;
    private ArrayAdapter<String> adapter1 ;
    private AutoCompleteTextView  act_main_act1;

     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
     act_main_act1=(AutoCompleteTextView)findViewById(R.id.act_main_cat1);//版本原因，有些需要强转有些不需要
     //获取数据
            data1 = new String[] { "愤怒的小鸟", "汤姆猫", "落汤鸡", "牛牛", "哈巴狗", "神龙", "烤鸭","小象", "美人鱼", "九尾狐" };
    //创建适配器
            adapter1 = new ArrayAdapter<String>( this,R.layout.act_main_item1,data1);
    //绑定适配器
            mtv_main_mtv1.setAdapter(adapter1);
     }
    }

结果为：