使用MultipartEntity上传文件（带进度对话框）

package com.home.uploadfile;

import java.io.File;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

	private Button uploadBtn;

	private HttpMultipartPost post;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.main);

		uploadBtn = (Button) findViewById(R.id.main_btn_upload);

		uploadBtn.setOnClickListener(this);

	}

	@Override

	public void onClick(View v) {

		if (v == uploadBtn) {

			// 自己手机上的一张图片路径

			String filePath = "/storage/sdcard0/updateAdtech/orgpic/1.png";

			String url = "http://service.ireadhome.com/api/Upload/Image";

			File file = new File(filePath);

			if (file.exists()) {

				post = new HttpMultipartPost(MainActivity.this, filePath, url);

				post.execute();

			} else {

				Toast.makeText(MainActivity.this, "文件不存在", Toast.LENGTH_LONG)

						.show();

			}

		}

		// if (post != null) {

		// if (!post.isCancelled()) {

		// post.cancel(true);

		// }

		// }

	}

}

　　AsyncTask子类：HttpMultipartPost：

package com.home.uploadfile;

import java.io.File;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.mime.content.FileBody;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.protocol.BasicHttpContext;

import org.apache.http.protocol.HttpContext;

import org.apache.http.util.EntityUtils;

import com.home.uploadfile.CustomMultipartEntity.ProgressListener;

import android.app.ProgressDialog;

import android.content.Context;

import android.os.AsyncTask;

public class HttpMultipartPost extends AsyncTask<String, Integer, String> {

	private Context context;

	private String filePath;

	private ProgressDialog pd;

	private long totalSize;

	private String requestUrl;

	public HttpMultipartPost(Context context, String filePath, String requestUrl) {

		this.context = context;

		this.filePath = filePath;

		this.requestUrl = requestUrl;

	}

	@Override

	protected void onPreExecute() {

		pd = new ProgressDialog(context);

		pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

		pd.setMessage("Uploading Picture...");

		pd.setCancelable(false);

		pd.show();

	}

	@Override

	protected String doInBackground(String... params) {

		String serverResponse = null;

		HttpClient httpClient = new DefaultHttpClient();

		HttpContext httpContext = new BasicHttpContext();

		HttpPost httpPost = new HttpPost(requestUrl);

		try {

			CustomMultipartEntity multipartContent = new CustomMultipartEntity(

					new ProgressListener() {

						@Override

						public void transferred(long num) {

							publishProgress((int) ((num / (float) totalSize) * 100));

						}

					});

			// 使用FileBody上传图片

			multipartContent.addPart("value", new FileBody(new File(filePath)));

			totalSize = multipartContent.getContentLength();

			// 上传

			httpPost.setEntity(multipartContent);

			HttpResponse response = httpClient.execute(httpPost, httpContext);

			serverResponse = EntityUtils.toString(response.getEntity());

			System.out.println(serverResponse);

		} catch (Exception e) {

			e.printStackTrace();

		}

		return serverResponse;

	}

	@Override

	protected void onProgressUpdate(Integer... progress) {

		pd.setProgress((int) (progress[0]));

	}

	@Override

	protected void onPostExecute(String result) {

		System.out.println("result: " + result);

		pd.dismiss();

	}

	@Override

	protected void onCancelled() {

		System.out.println("cancle");

	}

}

　　MultipartEntity子类：CustomMultipartEntity

package com.home.uploadfile;

import java.io.FilterOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.nio.charset.Charset;

import org.apache.http.entity.mime.HttpMultipartMode;

import org.apache.http.entity.mime.MultipartEntity;

public class CustomMultipartEntity extends MultipartEntity {

	private final ProgressListener listener;

	public CustomMultipartEntity(final ProgressListener listener) {

		super();

		this.listener = listener;

	}

	public CustomMultipartEntity(final HttpMultipartMode mode,

			final ProgressListener listener) {

		super(mode);

		this.listener = listener;

	}

	public CustomMultipartEntity(HttpMultipartMode mode, final String boundary,

			final Charset charset, final ProgressListener listener) {

		super(mode, boundary, charset);

		this.listener = listener;

	}

	@Override

	public void writeTo(OutputStream outstream) throws IOException {

		super.writeTo(new CountingOutputStream(outstream, this.listener));

	}

	public static interface ProgressListener {

		void transferred(long num);

	}

	public static class CountingOutputStream extends FilterOutputStream {

		private final ProgressListener listener;

		private long transferred;

		public CountingOutputStream(final OutputStream out,

				final ProgressListener listener) {

			super(out);

			this.listener = listener;

			this.transferred = 0;

		}

		public void write(byte[] b, int off, int len) throws IOException {

			out.write(b, off, len);

			this.transferred += len;

			this.listener.transferred(this.transferred);

		}

		public void write(int b) throws IOException {

			out.write(b);

			this.transferred++;

			this.listener.transferred(this.transferred);

		}

	}

}

　　参考：

http://m.blog.csdn.net/blog/u010142437/14639651

http://toolongdidntread.com/android/android-multipart-post-with-progress-bar/