Android 通過HTTP POST 上傳圖片檔案

Sending images can be done using the HttpComponents libraries. Download the latest HttpClient (currently 4.0.1) binary with dependencies package and copy apache-mime4j-0.6.jar and httpmime-4.0.1.jar to your project and add them to your Java build path.

You will need to add the following imports to your class.

import org.apache.http.entity.mime.HttpMultipartMode;import org.apache.http.entity.mime.MultipartEntity;import org.apache.http.entity.mime.content.FileBody;import org.apache.http.entity.mime.content.StringBody;

Now you can create a MultipartEntity to attach an image to your POST request. The following code shows an example of how to do this:

public void post(String url, List<NameValuePair> nameValuePairs) {    HttpClient httpClient = new DefaultHttpClient();    HttpContext localContext = new BasicHttpContext();    HttpPost httpPost = new HttpPost(url);    try {        MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);        for(int index=0; index < nameValuePairs.size(); index++) {            if(nameValuePairs.get(index).getName().equalsIgnoreCase("image")) {                // If the key equals to "image", we use FileBody to transfer the data                entity.addPart(nameValuePairs.get(index).getName(), new FileBody(new File (nameValuePairs.get(index).getValue())));            } else {                // Normal string data                entity.addPart(nameValuePairs.get(index).getName(), new StringBody(nameValuePairs.get(index).getValue()));            }        }        httpPost.setEntity(entity);        HttpResponse response = httpClient.execute(httpPost, localContext);    } catch (IOException e) {        e.printStackTrace();    }}