View--AutoCompleteView

[android]代码库

1.MainActivity.java

package com.example.acer.myapplication;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;


public class MainActivity extends AppCompatActivity {
        // 定义字符串数组作为提示的文本
        String[] books = new String[] { "rollen", "rollenholt", "rollenren", "roll" };

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            // 创建一个ArrayAdapter封装数组,simple_dropdown...是默认样式
            ArrayAdapter<String> av = new ArrayAdapter<String>(this,
                    android.R.layout.simple_dropdown_item_1line, books);
            AutoCompleteTextView auto = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
            auto.setAdapter(av);
        }
    }

2.activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:completionHint="请选择你喜欢的歌曲"
        android:completionThreshold="1"
        android:dropDownHorizontalOffset="20dp"
        android:ems="10"
        android:hint="输入" >
    </AutoCompleteTextView>
</LinearLayout>