Android UI设计 自动完成输入框 AutoCompleteTextView用法(类似Google,Baidu搜索)

AutoCompleteTextView可以像Google搜索一样,当你在搜索框里输入一些字符时(至少两个字符),会自动弹出一个下拉框提示类似的结果,如下图

极大地提高用户体验。下面我们来一步一步实现这个效果,先是布局xml,main.xml内容:


   <AutoCompleteTextView android:id="@+id/auto_complete"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"/>

接着是程序代码:


package com.pocketdigi;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class main extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final String[] strings=new String[]{"abc","abd","abe","bcd","bce","bcf"};
        //预定义字符串
        ArrayAdapter adapter=new ArrayAdapter(this,
        		android.R.layout.simple_dropdown_item_1line,strings);
        AutoCompleteTextView actv=(AutoCompleteTextView)findViewById(R.id.auto_complete);
        actv.setThreshold(1);//设置输入多少字符后提示,默认值为2
        actv.setAdapter(adapter);
        
    }
}

取值方法与普通文本框EditText相同


String v=actv.getText().toString();

© 2010, 冰冻鱼. 请尊重作者劳动成果,复制转载保留本站链接! 应用开发笔记