android 图片上传，使用 httpclient 的MultipartEntity 上传
该上传案例使用springmvc 为后台使用httpclient 方法传递文件比文件流和base64方法上传文件更方便简介。
该案例首先获取图片并将图片写入应用的SD卡文件夹。然后再上传给服务器
关于在SD卡中创建应用文件夹请参照
http://blog.csdn.net/u012373815/article/details/47614715
准备工作导入JAR包
Android 端需要导入
apache-mime4j-0.6.jar
httpmime-4.2.jar
Springmvc 需要导入
commons-fileupload-1.2.2.jar
commons-io-2.4.jar
所需jar包我以上传到我的资源页
http://download.csdn.net/detail/u012373815/9001465
Android 端需要添加访问网络权限和SD卡读写权限。
<!-- 网络权限 -->
<uses-permission android:name="android.permission.INTERNET"/>
<!--sd卡权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
1. 上传图片首先需要获取图片
OnClickListenerzhuceimg 为某一个控件的点击方法，点击选取图片
// 提取图片
public classOnClickListenerzhuceimg implements OnClickListener {
@Override
public void onClick(View v) {
ShowPickDialog();
}
}
/*
* 提示对话框
*/
private void ShowPickDialog() {
new AlertDialog.Builder(this)
.setTitle("设置头像")
.setNegativeButton("相册",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterfacedialog, intwhich) {
dialog.dismiss();// 对话框消失
if (SdCardUtil.checkSdCard() == true) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");// 相片类型
startActivityForResult(intent,1); // 跳到onActivityResult的 case1：
} else {
Toast.makeText(Userzhuce.this, "SD卡不存在", Toast.LENGTH_LONG).show();}
}
})
.setPositiveButton("拍照", newDialogInterface.OnClickListener() {
public void onClick(DialogInterfacedialog, intwhichButton) {
dialog.dismiss();
// 调用拍照
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 下面这句指定调用相机拍照后的照片存储的路径文件名用电话代替 intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri
.fromFile(new File(Environment
.getExternalStorageDirectory(),userphone + ".jpg")));
startActivityForResult(intent,2); // 跳到onActivityResult的 case2：
}
}).show();
}
@Override
protected voidonActivityResult(intrequestCode, intresultCode, Intent data) {
switch (requestCode) {
// 如果是直接从相册获取
case 1:
startPhotoZoom(data.getData());
break;
// 如果是调用相机拍照时
case 2:
Filetemp = newFile(Environment.getExternalStorageDirectory()
+"/"+ userphone+ ".jpg");
startPhotoZoom(Uri.fromFile(temp));
break;
// 取得裁剪后的图片
case 3:
/*
* 非空判断大家一定要验证，如果不验证的话， * 在剪裁之后如果发现不满意，要重新裁剪，丢弃
* 当前功能时，会报NullException，
*/
if (data != null) {
setPicToView(data); //保存图片到SD卡 } else{
Toast.makeText(this, "没拿到数据", 1).show();
}break;
default:break;
}
super.onActivityResult(requestCode, resultCode, data);
}
// 裁剪图片方法实现
public void startPhotoZoom(Uri uri){
Intentintent = newIntent("com.android.camera.action.CROP");
intent.setDataAndType(uri,"image/*");
// 下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪
intent.putExtra("crop", "true");
// aspectX aspectY 是宽高的比例
intent.putExtra("aspectX",1);
intent.putExtra("aspectY",1);
// outputX outputY 是裁剪图片宽高
intent.putExtra("outputX",500);
intent.putExtra("outputY",500);
intent.putExtra("return-data",true);
startActivityForResult(intent,3); // 跳到onActivityResult的 case3：
}
/*
* 保存裁剪之后的图片数据 *
*/
private void setPicToView(Intentpicdata) {
Bundleextras = picdata.getExtras();
Bitmapphoto = null;
if (extras != null) {
photo= (Bitmap) extras.get("data");
Drawable drawable = new BitmapDrawable(photo);
// 转换为drawable 用于显示
zhuceimg.setImageDrawable(drawable);
}
if (photo != null) {
saveImgTosdFile(photo);
}
}
// 将图片写到sd卡
public void saveImgTosdFile(Bitmapbitmap) {
FileOutputStreamfos = null;
Stringfilename = SdCardUtil.getSdPath() + SdCardUtil.FILEDIR + "/"
+SdCardUtil.FILEPHOTO+ "/"+ System.currentTimeMillis();
if (!filename.isEmpty()) {
imageurl = filename;
}
try {
fos= newFileOutputStream(filename);
//将图片写道SD卡中以filename为名字bitmap.compress(Bitmap.CompressFormat.PNG,
60, fos);
}catch(FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
fos.flush();
}catch(IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// end 图片
// 上传和返回结果处理
final Handler handlerzhuce= newHandler() {
public void handleMessage(Messagemsg) {
Stringstr = (String) msg.obj;
if (!str.equals("no")) {
Toast.makeText(Userzhuce.this, "完善信息成功！", Toast.LENGTH_SHORT).show();
startActivity(new Intent(Userzhuce.this, Wo.class));
}else{
Toast.makeText(Userzhuce.this, "信息完善失败！！", Toast.LENGTH_SHORT)
.show();
}
}
};
// 点击更新
public classOnClickListenerzhuce implements OnClickListener {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (zhucenc.getText().toString().equals("")) {
Toast.makeText(Userzhuce.this, "昵称不能为空！！！", Toast.LENGTH_SHORT)
.show();
}else{
//imageurl 为图片在手机上存储的位置
Filefile = newFile(imageurl);
newThread(updateUser.updateuser(
HttpPath.USERUPDATE_PATH,userphone,
zhucenc.getText().toString(),
zhuceaddress.getText().toString(),
handlerzhuce, file)).start();
}
}
}
2. 上传图片的httpclient 工具类
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
public classupdateUser {
public staticRunnable updateuser (final String path, final String userphone, final String username,
final String address, final Handler handler,
final File imgfile ){
Runnablerun=newRunnable() {
Stringresult=null;
@Override
public void run() {
// TODO Auto-generated method stub
HttpClienthttpClient=newDefaultHttpClient();
HttpPosthttpPost=newHttpPost(path);
FileBodyfile=newFileBody(imgfile);
MultipartEntity emEntity=new MultipartEntity();
try {//封装所需数据，包括文件和所需的Strig 数据
emEntity.addPart("file",file);
emEntity.addPart("userphone",newStringBody(userphone,Charset.forName("utf-8")));
emEntity.addPart("username",newStringBody(username,Charset.forName("utf-8")));
emEntity.addPart("address",newStringBody(address,Charset.forName("utf-8")));
httpPost.setEntity(emEntity);
Log.i("TAG", "post总字节数:"+emEntity.getContentLength());
HttpResponsehttpResponse=httpClient.execute(httpPost);
intcode=httpResponse.getStatusLine().getStatusCode();
if(code==200)
{
System.out.println("链接成功"); result=EntityUtils.toString(httpResponse.getEntity());
}
Messagemessage=handler.obtainMessage();
message.obj=result;
handler.sendMessage(message);
}catch(UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch(ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch(IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
return run;
}
3. 服务器端controller 代码书写
关于service 的代码书写就不在这里写了
//@RequestParam("file")为文件上传的标识 “file“
@RequestMapping("/upUser")
@ResponseBody
public StringupUser(HttpServletRequest httpRequest, @RequestParam("file") MultipartFile file) throws Exception {
System.out.println("sdfsdfsdf");
Stringuserphone = httpRequest.getParameter("userphone");
Stringusername = httpRequest.getParameter("username");
Stringaddress = httpRequest.getParameter("address");
System.out.println(userphone+username+"______");
// 接收图片
//图片存储路径
Stringimagepath = httpRequest.getSession().getServletContext()
.getRealPath("/")
+"images"+ "/"+ userphone + ".jpg";
Filef = newFile(imagepath);
file.transferTo(f);
//图片名称
String userimg="/backtow/images"
+"/"+userphone+".jpg";
Usersuser=newUsers();
user.setUserphone(userphone);
user.setUsername(username);
user.setAddress(address);
user.setUserimg(userimg);
Stringresult=userservice.upUser(user);
return result;
}