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);
    }
}