每日日报

AutoCompleteTextView控件的使用

1.public class MainActivity extends Activity {
2.    private String[] names = {"laowang","laozhang","laoli","xiaowang","xiaozhang","xiaoli"};
3.    @Override
4.    protected void onCreate(Bundle savedInstanceState) {
5.        super.onCreate(savedInstanceState);
6.        setContentView(R.layout.activity_main);
7.      AutoCompleteTextView actv = (AutoCompleteTextView) findViewById(R.id.actv_text);
8.      //给自动补全的textview设置一个数据适配器 这个适配器用来提供显示下拉列表的内容
9.      ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(),R.layout.item, names);
10.      //设置适配器
11.      actv.setAdapter(adapter);
12.    }

布局文件中声明对应节点

1.<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
2.    xmlns:tools="http://schemas.android.com/tools"
3.    android:layout_width="match_parent"
4.    android:layout_height="match_parent"
5.    android:paddingBottom="@dimen/activity_vertical_margin"
6.    android:paddingLeft="@dimen/activity_horizontal_margin"
7.    android:paddingRight="@dimen/activity_horizontal_margin"
8.    android:paddingTop="@dimen/activity_vertical_margin"
9.    tools:context=".MainActivity" >
10.
11.    <AutoCompleteTextView
12.        android:id="@+id/actv_text"
13.        android:layout_width="match_parent"
14.        android:layout_height="wrap_content"
15.        android:completionThreshold="1"
16.        android:hint="请输入内容" />
17.
18.</RelativeLayout>

completionThreshold 通过这个属性来指定 输入多少个字符会出现提示