Android开发之httpclient文件上传实现

文件上传可能是一个比较耗时的操作，如果为上传操作带上进度提示则可以更好的提高用户体验，最后效果如下图：

项目源码：http://download.csdn.net/detail/shinay/4965230

这里只贴出代码，可根据实际情况自行修改。

packagecom.lxb.uploadwithprogress.http;

importjava.io.File;

importorg.apache.http.HttpResponse;
importorg.apache.http.client.HttpClient;
importorg.apache.http.client.methods.HttpPost;
importorg.apache.http.entity.mime.content.FileBody;
importorg.apache.http.impl.client.DefaultHttpClient;
importorg.apache.http.protocol.BasicHttpContext;
importorg.apache.http.protocol.HttpContext;
importorg.apache.http.util.EntityUtils;

importandroid.app.ProgressDialog;
importandroid.content.Context;
importandroid.os.AsyncTask;

importcom.lxb.uploadwithprogress.http.CustomMultipartEntity.ProgressListener;

publicclassHttpMultipartPostextendsAsyncTask<String,Integer,String>{

privateContextcontext;
privateStringfilePath;
privateProgressDialogpd;
privatelongtotalSize;

publicHttpMultipartPost(Contextcontext,StringfilePath){
this.context=context;
this.filePath=filePath;
}

@Override
protectedvoidonPreExecute(){
pd=newProgressDialog(context);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setMessage("UploadingPicture...");
pd.setCancelable(false);
pd.show();
}

@Override
protectedStringdoInBackground(String...params){
StringserverResponse=null;

HttpClienthttpClient=newDefaultHttpClient();
HttpContexthttpContext=newBasicHttpContext();
HttpPosthttpPost=newHttpPost("上传URL，如：http://www.xx.com/upload.php");

try{
CustomMultipartEntitymultipartContent=newCustomMultipartEntity(
newProgressListener(){
@Override
publicvoidtransferred(longnum){
publishProgress((int)((num/(float)totalSize)*100));
}
});

//WeuseFileBodytotransferanimage
multipartContent.addPart("data",newFileBody(newFile(
filePath)));
totalSize=multipartContent.getContentLength();

//Sendit
httpPost.setEntity(multipartContent);
HttpResponseresponse=httpClient.execute(httpPost,httpContext);
serverResponse=EntityUtils.toString(response.getEntity());

}catch(Exceptione){
e.printStackTrace();
}

returnserverResponse;
}

@Override
protectedvoidonProgressUpdate(Integer...progress){
pd.setProgress((int)(progress[0]));
}

@Override
protectedvoidonPostExecute(Stringresult){
System.out.println("result:"+result);
pd.dismiss();
}

@Override
protectedvoidonCancelled(){
System.out.println("cancle");
}

}

packagecom.lxb.uploadwithprogress.http;

importjava.io.FilterOutputStream;
importjava.io.IOException;
importjava.io.OutputStream;
importjava.nio.charset.Charset;

importorg.apache.http.entity.mime.HttpMultipartMode;
importorg.apache.http.entity.mime.MultipartEntity;

publicclassCustomMultipartEntityextendsMultipartEntity{

privatefinalProgressListenerlistener;

publicCustomMultipartEntity(finalProgressListenerlistener){
super();
this.listener=listener;
}

publicCustomMultipartEntity(finalHttpMultipartModemode,
finalProgressListenerlistener){
super(mode);
this.listener=listener;
}

publicCustomMultipartEntity(HttpMultipartModemode,finalStringboundary,
finalCharsetcharset,finalProgressListenerlistener){
super(mode,boundary,charset);
this.listener=listener;
}

@Override
publicvoidwriteTo(OutputStreamoutstream)throwsIOException{
super.writeTo(newCountingOutputStream(outstream,this.listener));
}

publicstaticinterfaceProgressListener{
voidtransferred(longnum);
}

publicstaticclassCountingOutputStreamextendsFilterOutputStream{

privatefinalProgressListenerlistener;
privatelongtransferred;

publicCountingOutputStream(finalOutputStreamout,
finalProgressListenerlistener){
super(out);
this.listener=listener;
this.transferred=0;
}

publicvoidwrite(byte[]b,intoff,intlen)throwsIOException{
out.write(b,off,len);
this.transferred+=len;
this.listener.transferred(this.transferred);
}

publicvoidwrite(intb)throwsIOException{
out.write(b);
this.transferred++;
this.listener.transferred(this.transferred);
}
}

}

上面为两个主要的类，下面放一个调用的Activity

packagecom.lxb.uploadwithprogress;

importjava.io.File;

importcom.lxb.uploadwithprogress.http.HttpMultipartPost;

importandroid.app.Activity;
importandroid.content.Context;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.Toast;

publicclassMainActivityextendsActivityimplementsOnClickListener{

privateContextcontext;

privateEditTextet_filepath;
privateButtonbtn_upload;
privateButtonbtn_cancle;

privateHttpMultipartPostpost;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);

context=this;

setContentView(R.layout.activity_main);

et_filepath=(EditText)findViewById(R.id.et_filepath);
btn_upload=(Button)findViewById(R.id.btn_upload);
btn_cancle=(Button)findViewById(R.id.btn_cancle);

btn_upload.setOnClickListener(this);
btn_cancle.setOnClickListener(this);
}

@Override
publicvoidonClick(Viewv){
switch(v.getId()){
caseR.id.btn_upload:
StringfilePath=et_filepath.getText().toString();
Filefile=newFile(filePath);
if(file.exists()){
post=newHttpMultipartPost(context,filePath);
post.execute();
}else{
Toast.makeText(context,"filenotexists",Toast.LENGTH_LONG).show();
}
break;
caseR.id.btn_cancle:
if(post!=null){
if(!post.isCancelled()){
post.cancel(true);
}
}
break;
}

}

}

当然，在Android中使用MultipartEntity类，必须为项目增加相应的jar包，httpmime-4.1.2.jar。

最后放上代码，工程里已包含jar。

地址：

http://download.csdn.net/detail/shinay/4965230