输入框自动提示的实现

布局文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"android:layout_width="match_parent" android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.example.it.MainActivity"><AutoCompleteTextView    android:id="@+id/act_input"    android:hint="请输入您要搜索的内容"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:completionThreshold="3"/><!--设置输入多少字符时开始进行匹配--></RelativeLayout>

适配器布局文件(主要对匹配内容的字体颜色等进行设置)

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:textSize="25sp"android:textColor="#000000"></TextView>

核心代码

package com.example.it;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;public class MainActivity extends AppCompatActivity {private AutoCompleteTextView act_input;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    //初始化控件    act_input = (AutoCompleteTextView) findViewById(R.id.act_input);    //为输入框初始化数据    initData();}private void initData() {    //设置数据    String[]data = {"zhangsan","lisi","wangwu","zhaoliu"};    //设置适配器,并添加布局文件和数据    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.item,data);    //加载适配器    act_input.setAdapter(adapter);}}