listView显示保存在服务器的图片，不是网页上的图片

查了很多文档终于搞明白了，SimpleAdapter中的from参数是hashmap，但value不一定非要是int 型的id才行，是bitmap也行，只不过后面再处理一下即可，移动端：：手机和电脑连接同一个wifi

package com.example.listview_8;import java.io.ByteArrayInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.params.BasicHttpParams;import org.apache.http.params.HttpConnectionParams;import org.apache.http.protocol.HTTP;import org.apache.http.util.EntityUtils;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ImageView;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.SimpleAdapter.ViewBinder;import android.widget.Toast;public class MainActivity extends Activity {private static final int REQUEST_TIMEOUT = 5 * 1000;// 设置请求超时10秒钟private static final int SO_TIMEOUT = 10 * 60 * 1000; // 设置请求超时时间10秒钟private static final int LOGIN_OK = 1;    private Handler handler ;private ListView lv1;private int  COUNT=5;//////COUNT=10时图片显示会乱序，有待改进private Bitmap[] imagesId=new Bitmap[COUNT];//privateString[] names={"短毛猫"};//private  String[] mark={"可爱"};//privateString[] names={"短毛猫1","猴子2","兔子3","老鼠4","斑马5","短毛猫6","猴子7","兔子8","老鼠9","斑马10"};//private  String[] mark={"可爱1","顽皮2","温顺3","伶俐4","强壮5","可爱6","顽皮7","温顺8","伶俐9","强壮10"};privateString[] names={"短毛猫1","猴子1","兔子1","老鼠1","斑马1"};private  String[] mark={"可爱1","顽皮1","温顺1","伶俐1","强壮1"};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);lv1 = (ListView) findViewById(R.id.listView1);final List<Map<String,Object>> listItems = new ArrayList<Map<String,Object>>(); for(int i=1;i<=COUNT;i++){fun_HttpPost(i);}handler = new Handler(){@Overridepublic void handleMessage(Message msg) {// TODO 自动生成的方法存根///super.handleMessage(msg);if((Bitmap)msg.obj!=null){Log.i("==========================Bitmap)msg.obj==null===================", "Bitmap)msg.obj==null");}int num=msg.what-1;imagesId[num]=(Bitmap)msg.obj;//for(int i=msg.what-1;i<names.length;i++){//Map<String,Object> listItem = new HashMap<String,Object>();//listItem.put("face", imagesId[i]);//listItem.put("name", names[i]);//listItem.put("mark", mark[i]);//listItems.add(listItem);//}Map<String,Object> listItem = new HashMap<String,Object>();listItem.put("face", imagesId[num]);listItem.put("name", names[num]);listItem.put("mark", mark[num]);listItems.add(listItem);SimpleAdapter simleAdapter = new SimpleAdapter(MainActivity.this, listItems, R.layout.custom_list,new String[]{"face","name","mark"}, new int[]{R.id.face,R.id.name,R.id.mark});simleAdapter.setViewBinder(new ViewBinder() {public boolean setViewValue(View view, Object data,String textRepresentation) {// 判断是否为我们要处理的对象if (view instanceof ImageView && data instanceof Bitmap) {ImageView iv = (ImageView) view;iv.setImageBitmap((Bitmap) data);return true;} elsereturn false;}});lv1.setAdapter(simleAdapter);}////handleMessage};////handler = new Handler()lv1.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {// TODO 自动生成的方法存根Toast.makeText(MainActivity.this, "点击的是第"+position+"个条目", Toast.LENGTH_SHORT).show();}});//Bitmap catBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.cat);//Bitmap monkeyBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.monkey);//Bitmap rabbitBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.rabbit);//Bitmap ratBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.rat);//BitmapimagesId[]={catBitmap,monkeyBitmap,rabbitBitmap,ratBitmap};}///onCreatepublic void fun_HttpPost(final int i) {// //生成faceBitmap[]new Thread(new Runnable() {// //在子线程中传递msg，主线程中接收msg;;要是用fun_HttpPost()的返回值会失败@Overridepublic void run() {// TODO 自动生成的方法存根String urlStr = "http://192.168.0.101:8080/download/servlet/download";HttpPost request = new HttpPost(urlStr);// 如果传递参数多的话，可以对传递的参数进行封装List<NameValuePair> params = new ArrayList<NameValuePair>();// 设置要下载的头像名称params.add(new BasicNameValuePair("picN", String.valueOf(i)));// params.add(new BasicNameValuePair("pic2","2"));// params.add(new BasicNameValuePair("pic3","3"));// params.add(new BasicNameValuePair("password",// passwordString));// params.add(new BasicNameValuePair("nickname",// nicknameString));try {HttpClient client = getHttpClient();request.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));// 执行请求返回相应HttpResponse response = client.execute(request);// 判断是否请求成功if (response.getStatusLine().getStatusCode() == 200) {// 获得响应信息String responseMessage = EntityUtils.toString(response.getEntity());Log.i("responseMessage", responseMessage+ ",长度：" + responseMessage.length());Bitmap bitmap = GenerateImage(responseMessage);// //生成BitmapMessage msg = new Message();msg.what = i;//Log.i("------------------- msg.what=i---------------",String.valueOf(i - 1));//msg.obj = bitmap;// //传递msghandler.sendMessage(msg);}} catch (Exception e) {e.printStackTrace();}}// //run()}).start();}// /fun_register()// base64字符串转化成图片public static Bitmap GenerateImage(String imgStr) { // 对字节数组字符串进行Base64解码并生成图片if (imgStr == null) // 图像数据为空{Log.i("imgStr == null", "imgStr == null");return setNullBitmapImage();}Decoder.BASE64Decoder decoder = new Decoder.BASE64Decoder();try {// Base64解码byte[] b = decoder.decodeBuffer(imgStr);for (int i = 0; i < b.length; ++i) {if (b[i] < 0) {// 调整异常数据b[i] += 256;}}InputStream ins = new ByteArrayInputStream(b);Bitmap bitmap = new BitmapFactory().decodeStream(ins);return bitmap;} catch (Exception e) {Log.i("imgStr == null,catch (Exception e)","imgStr == null,catch (Exception e)");return setNullBitmapImage();}}// /GenerateImageprivate static Bitmap setNullBitmapImage() {String filePath = "/sdcard/1spray/11.jpg";File file = new File(filePath);Bitmap bitmap = null;try {InputStream is = new FileInputStream(file);bitmap = new BitmapFactory().decodeStream(is);Log.i("setNullBitmapImage()", "setNullBitmapImage()");// /imageView1.setImageBitmap(bitmap);} catch (FileNotFoundException e) {// TODO 自动生成的 catch 块e.printStackTrace();}return bitmap;}///setNullBitmapImage// 初始化HttpClient，并设置超时public HttpClient getHttpClient() {BasicHttpParams httpParams = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(httpParams, REQUEST_TIMEOUT);HttpConnectionParams.setSoTimeout(httpParams, SO_TIMEOUT);HttpClient client = new DefaultHttpClient(httpParams);return client;}// /public HttpClient getHttpClient()}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <ListView        android:id="@+id/listView1"        android:layout_width="match_parent"        android:layout_height="wrap_content" >    </ListView></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <ImageView        android:id="@+id/face"        android:layout_width="100dp"        android:layout_height="100dp"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:src="@drawable/ic_launcher" />    <TextView        android:id="@+id/name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_marginLeft="57dp"        android:layout_marginTop="20dp"        android:layout_toRightOf="@+id/face"        android:paddingLeft="20dp"        android:text="TextView"        android:textSize="20sp" />    <TextView        android:id="@+id/mark"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignRight="@+id/name"        android:layout_below="@+id/name"        android:layout_marginTop="10dp"         android:textSize="15sp"         android:text="mark"  /></RelativeLayout>

</pre><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.listview_8"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="15"        android:targetSdkVersion="16" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />    <uses-permission android:name="android.permission.GET_ACCOUNTS" />    <uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />    <uses-permission android:name="android.permission.READ_PHONE_STATE" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />     <uses-permission android:name="android.permission.GET_TASKS" />    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />    <uses-permission android:name="android.permission.READ_LOGS" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

</pre><pre name="code" class="html">

服务器端：：

package com;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import sun.misc.BASE64Encoder;public class download extends HttpServlet {/** * Constructor of the object. */public download() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}/** * The doGet method of the servlet. <br> *  * This method is called when a form has its tag value method equals to get. *  * @param request *            the request send by the client to the server * @param response *            the response send by the server to the client * @throws ServletException *             if an error occurred * @throws IOException *             if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}/** * The doPost method of the servlet. <br> *  * This method is called when a form has its tag value method equals to * post. *  * @param request *            the request send by the client to the server * @param response *            the response send by the server to the client * @throws ServletException *             if an error occurred * @throws IOException *             if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html");// request.setCharacterEncoding("utf-8");////这句至关重要，不然中文的文件名称显示乱码PrintWriter out = response.getWriter();request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");String picN = request.getParameter("picN");//String pic2 = request.getParameter("pic2");//String password = request.getParameter("password");//String nickname = request.getParameter("nickname");//String faceImageString = request.getParameter("faceImage");out.print(GetImageStr(picN));// /输出文件的字符串out.flush();out.close();}/** * Initialization of the servlet. <br> *  * @throws ServletException *             if an error occurs */public void init() throws ServletException {// Put your code here}public static String GetImageStr(String picName) {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理// String imgFile =// "d://test.jpg";//待处理的图片String imgFile = "F://upload//"+picName+".jpg";// //可以// String imgFile = "F://upload//软工大作业.ppt";// //可以// String imgFile="F://upload//爱的勇气.mp3";//可以// String imgFile="F://upload//upload.rar";//可以InputStream in = null;byte[] data = null;// 读取图片字节数组try {in = new FileInputStream(imgFile);data = new byte[in.available()];in.read(data);in.close();} catch (IOException e) {e.printStackTrace();}// 对字节数组Base64编码BASE64Encoder encoder = new BASE64Encoder();return encoder.encode(data);// 返回Base64编码过的字节数组字符串} // /GetImageStr}

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另外这是我个人开发的App，欢迎下载和好评，V1.5.0版本正在努力开发中......

http://www.wandoujia.com/apps/com.example.viewpager_3