转 Android HttpClient post MultipartEntity - Android 上传文件

转自 /Uploads/Images/Content/201503/cd7efe929c89d581656bbb2e27e3e017

在Android 中使用HttpClient，MultipartEntity

为了发送图片，文件等资源，现在采用开源的org.apache.http.entity.mime.MultipartEntity

一.去官网http://hc.apache.org/downloads.cgi 下载

可以只下载binary，如果可能需要修改源文件的话，可以直接下载source.

二.导入jar包

将下载下来的httpcomponents-client-4.2.5-bin.zip取其httpcomponents-client-4.2.5-bin.zip\httpcomponents-client-4.2.5\lib\httpmime-4.2.5.jar包

将httpmime-4.2.5.jar包，放到android工程的lib目录下。

三. 查看jar包，

我这里用的是源文件，因为我需要修改些东西

三.使用

[java] view plaincopy

class MyAsyncTask extends AsyncTask<String, Integer, String> {

String FORM_TABLE_NAME = "ask?action=Chatbottom-toSay-";// 自己需要配置的表单

String filePath = "/mnt/sdcard/picture.jpg";// 测试写的文件路径，转换成自己的文件路径

final String hostUrl = "http://www.myhost.com";// 写成自己要上传的地址

@Override

protected String doInBackground(String... params) {

HttpClient httpclient = null;

httpclient = new DefaultHttpClient();

final HttpPost httppost = new HttpPost(hostUrl);

final File imageFile = new File(filePath);

final MultipartEntity multipartEntity = new MultipartEntity();

if (false) {

InputStream in = null;

try {

in = new FileInputStream(imageFile);

} catch (FileNotFoundException e) {

e.printStackTrace();

}

InputStreamBody inputStreamBody = new InputStreamBody(in,

"android_inputstream.jpg");

// FormBodyPart formBodyPart = new FormBodyPart(FORM_TABLE_NAME,

// contentBody);

multipartEntity.addPart(FORM_TABLE_NAME, inputStreamBody);

}

if (false) {

ContentBody contentBody = new FileBody(imageFile);

FormBodyPart formBodyPart = new FormBodyPart(FORM_TABLE_NAME,

contentBody);

multipartEntity.addPart(formBodyPart);

}

if (false) {

// FileBody fileBody = new FileBody(imageFile, "image/jpeg",

// "utf-8");

FileBody fileBody = new FileBody(imageFile);

multipartEntity.addPart(FORM_TABLE_NAME, fileBody);

}

if (true) {

Bitmap photoBM = BitmapFactory.decodeFile(filePath);

if (photoBM == null) {

return null;

}

ByteArrayOutputStream photoBao = new ByteArrayOutputStream();

boolean successCompress = photoBM.compress(CompressFormat.JPEG,

80, photoBao);

if (!successCompress) {

return null;

}

ByteArrayBody byteArrayBody = new ByteArrayBody(

photoBao.toByteArray(), "android.jpg");

photoBM.recycle();

// InputStreamBody inbody = new InputStreamBody(new InputStream,

// filename);

multipartEntity.addPart(FORM_TABLE_NAME, byteArrayBody);

}

httppost.setEntity(multipartEntity);

HttpResponse httpResponse;

try {

httpResponse = httpclient.execute(httppost);

final int statusCode = httpResponse.getStatusLine()

.getStatusCode();

String response = EntityUtils.toString(

httpResponse.getEntity(), HTTP.UTF_8);

IWLog.d("got response:\n" + response);

if (statusCode == HttpStatus.SC_OK) {

return "success";

}

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

if (httpclient != null) {

httpclient.getConnectionManager().shutdown();

httpclient = null;

}

}

return null;

}

@Override

protected void onPostExecute(String result) {

super.onPostExecute(result);

if (result.equals("success")) {

}

}

}

四.与HttpURLConnection比较

网上好多人都用的是HttpURLConnection来上传图片，文件。由于我在解决实际问题时HttpURLConnection并不能达到预期，老是死在urlConnection.getInputStream()永远回不来。所以不得以改用的上面的库。最终感觉MultipartEntity用起来比较简单。

附：

在解决实际问题中，我也不是一帆风顺，也遇到了各种抽象的问题。推荐给大家个工具wireshark工具，用于抓取网络协议用的。很有帮助