activity_main.xml
<?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:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.prace3.MainActivity"> <AutoCompleteTextView android:id="@+id/autotext" android:hint="请输入关键词" android:completionThreshold="2" android:layout_width="match_parent" android:layout_height="wrap_content" /> </RelativeLayout>
MainActivity.java
package com.example.prace3; import android.app.Activity; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; public class MainActivity extends Activity { private AutoCompleteTextView actextview; private String[] res = {"And","Android","Android Studio","beijing","shanghai"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /* 1.初始化控件 2.需要一个适配器 3.初始化数据源(去匹配闻不如你框输入内容) 4.将adpter与当前AutoCompleteTextView绑定 */ actextview = findViewById(R.id.autotext); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, res); actextview.setAdapter(adapter); } }