下拉选择框 Spinner的用法。

代码如下：

package com.lixu.xialakuang;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;

public class MainActivity extends Activity {
    TextView tv2;
    TextView tv3;

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

        final String[] start = this.getResources().getStringArray(R.array.start);
        final String[] target = this.getResources().getStringArray(R.array.target);

        Spinner spinner1 = (Spinner) findViewById(R.id.sp1);
        Spinner spinner2 = (Spinner) findViewById(R.id.sp2);

        tv2 = (TextView) findViewById(R.id.tv2);
        tv3 = (TextView) findViewById(R.id.tv3);

        tv2.setTextSize(20);
        tv3.setTextSize(20);

        MyAdapterr mMyAdapterr = new MyAdapterr(this, -1, target);

        MyAdapterr mMyAdapter = new MyAdapterr(this, -1, start);

        spinner1.setAdapter(mMyAdapter);

        spinner2.setAdapter(mMyAdapterr);

        spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                tv2.setText(target[arg2]);
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
            }
        });
        spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                tv3.setText(start[arg2]);
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
            }
        });

    }

    private class MyAdapterr extends ArrayAdapter {
        LayoutInflater flater;
        private Context context;
        private String[] target;
        int[] image = { R.drawable.beijing, R.drawable.chengdu, R.drawable.guangzhou, R.drawable.hangzhou,
                R.drawable.wuhan, R.drawable.xian, R.drawable.shenzhen };

        @Override
        public int getCount() {

            return target.length;
        }

        public MyAdapterr(Context context, int resource, String[] target) {
            super(context, resource, target);
            this.context = context;
            this.target = target;
            this.image = image;
            flater = LayoutInflater.from(context);
        }

        // 设置最上面选中列表的view
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null)
                convertView = flater.inflate(R.layout.list, null);
            ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
            iv.setImageResource(image[position]);

            TextView tv = (TextView) convertView.findViewById(R.id.tv1);
            tv.setBackgroundColor(Color.RED);

            tv.setText(target[position]);
            return convertView;
        }

        // 设置下拉列表的 view 如果不写这个方法会报 Resources$NotFoundException: Resource ID
        // #0xffffffff这个错误

        @Override
        public View getDropDownView(int position, View convertView, ViewGroup parent) {
            if (convertView == null)
                convertView = flater.inflate(R.layout.list, null);
            ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
            iv.setImageResource(image[position]);

            TextView tv = (TextView) convertView.findViewById(R.id.tv1);

            tv.setBackgroundColor(Color.GREEN);
            tv.setText(target[position]);
            return convertView;
        }
    }

    private class MyAdapter extends ArrayAdapter {

        LayoutInflater flater;
        private Context context;
        private String[] start;
        int[] image = { R.drawable.beijing, R.drawable.chengdu, R.drawable.guangzhou, R.drawable.hangzhou,
                R.drawable.wuhan, R.drawable.xian, R.drawable.shenzhen };

        @Override
        public int getCount() {

            return start.length;
        }

        public MyAdapter(Context context, int resource, String[] target) {
            super(context, resource, target);
            this.context = context;
            this.start = start;
            flater = LayoutInflater.from(context);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null)
                convertView = flater.inflate(R.layout.list, null);

            ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
            iv.setImageResource(image[position]);

            TextView tv = (TextView) convertView.findViewById(R.id.tv1);
            tv.setBackgroundColor(Color.RED);
            tv.setText(start[position]);

            return convertView;
        }

        @Override
        public View getDropDownView(int position, View convertView, ViewGroup parent) {
            if (convertView == null)
                convertView = flater.inflate(R.layout.list, null);
            ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
            iv.setImageResource(image[position]);
            TextView tv = (TextView) convertView.findViewById(R.id.tv1);

            tv.setText(start[position]);
            tv.setBackgroundColor(Color.GREEN);

            return convertView;
        }
    }
}

xml：

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


    <ImageView
        android:id="@+id/iv1"
        android:layout_width="50dp"
        android:layout_height="50dp" />

    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:paddingLeft="10dp"
        android:textSize="20sp" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string-array name="start">
        <item>北京</item>
        <item>成都</item>
        <item>广州</item>
        <item>杭州</item>
        <item>武汉</item>
        <item>西安</item>
        <item>深圳</item>
    </string-array>
    <string-array name="target">
        <item>北京</item>
        <item>成都</item>
        <item>广州</item>
        <item>杭州</item>
        <item>武汉</item>
        <item>西安</item>
        <item>深圳</item>
    </string-array>

</resources>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.lixu.xialakuang.MainActivity" >

    <TextView
        android:id="@+id/tv2"
        android:layout_width="150dp"
        android:layout_height="50dp"
        android:layout_alignParentTop="true"
        android:gravity="center" />

    <TextView
        android:id="@+id/tv3"
        android:layout_width="150dp"
        android:layout_height="50dp"
        android:layout_toRightOf="@id/tv2"
        android:gravity="center" />

    <LinearLayout
        android:id="@+id/linearlayout"
        android:layout_width="300dp"
        android:layout_height="200dp"
        android:layout_below="@+id/tv2"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal" >

        <Spinner
            android:id="@+id/sp1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <Spinner
            android:id="@+id/sp2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1" />
    </LinearLayout>

</RelativeLayout>

运行效果图：