Android开发之AutoCompleteTextView的简单使用

这里只谈简单的使用：

代码xml：

1 <AutoCompleteTextView
2         android:id="@+id/actv"
3         android:layout_width="match_parent"
4         android:layout_height="wrap_content"
5         android:completionThreshold="1"        
6          />

1、android:completionThreshold="1"属性：

　　这个属性是设置用户输入多少个字符才会显示提示。

MainActivity:

 1 public class MainActivity extends Activity {
 2 
 3     //[0]声明AutoCompleteTextView要显示的数据
 4       private static final String[] COUNTRIES = new String[] {
 5              "laofang", "laozhang", "laoli", "laobi","laoli","laowang","aab","abb","cc"
 6          };
 7 
 8     @Override
 9     protected void onCreate(Bundle savedInstanceState) {
10         super.onCreate(savedInstanceState);
11         setContentView(R.layout.activity_main);
12         //[1]找到控件
13         AutoCompleteTextView actv = (AutoCompleteTextView) findViewById(R.id.actv);
14         
15         //[2]创建数据适配器
16         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
17                 android.R.layout.simple_dropdown_item_1line, COUNTRIES);
18 
19         //[3]设置数据适配器
20         actv.setAdapter(adapter);
21     }
22 }