android studio自动提示文本框

protected void onCreate(Bundle savedInstanceState) {
private String[] data1;
private ArrayAdapter 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( this,R.layout.act_main_item1,data1);
//绑定适配器
        mtv_main_mtv1.setAdapter(adapter1);
 }
}