AutoCompleteTextView控件的使用

public class MainActivity extends Activity {

//[0]声明AutoCompleteTextView要显示的数据
private static final String[] COUNTRIES = new String[] {
"laofang", "laozhang", "laoli", "laobi","laoli","laowang","aab","abb","cc"
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//[1]找到控件
AutoCompleteTextView actv = (AutoCompleteTextView) findViewById(R.id.actv);

//[2]创建数据适配器
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line, COUNTRIES);

//[3]设置数据适配器
actv.setAdapter(adapter);
}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<AutoCompleteTextView
android:id="@+id/actv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:completionThreshold="1"
/>

</RelativeLayout>