Android开发之AutoCompleteTextView的简单使用

这里只谈简单的使用：

代码xml：

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

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:

 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);
     }
 }