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/