Spinner-----android 高级控件 (下拉列表)

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因为是最简单的实现，所以没有很多的解释，直接放代码

一、实现效果

二、activity_main.XML文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent">    <Spinner        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/s_main_spinner"        ></Spinner></LinearLayout>

三、MainActivity.java文件

package com.example.g160628_07;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.SimpleAdapter;import android.widget.Spinner;import android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * Created by Administrator on 2017/6/8 0008. */public class SpinnerActivity extends AppCompatActivity {    private Spinner s_main_spinner;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        s_main_spinner = (Spinner) findViewById(R.id.s_main_spinner);        //给下拉列表设置适配器        final String provinces[]={"湖南省","河南省","海南省"};        int images[]={R.drawable.dog,R.drawable.elephant,R.drawable.fox};        List<Map<String,Object>> list=new ArrayList<>();        for (int i = 0; i < provinces.length; i++) {            Map<String,Object> map=new HashMap<>();            map.put("title",provinces[i]);            map.put("image",images[i]);            list.add(map);        }        //适配器        //SimpleAdapter        SimpleAdapter adapterSpinner=new SimpleAdapter(this,list,android.R.layout.activity_list_item,new String[]{"title","image"},new int[]{android.R.id.text1,android.R.id.icon});        s_main_spinner.setAdapter(adapterSpinner);        //给下列列表设置选择事件        s_main_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {                Toast.makeText(SpinnerActivity.this, provinces[i], Toast.LENGTH_SHORT).show();            }            @Override            public void onNothingSelected(AdapterView<?> adapterView) {            }        });    }}

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