android实现带进度条的文件上传

MainActivity.java

package com.example.upload;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;

public class MainActivity extends Activity implements OnClickListener{
  public static String url = "http://xxx.xxx.xx";
  public static String path = "/sdcard/wrar380sc.exe";
  public static ProgressBar bar;
  Button upload;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    bar = (ProgressBar) findViewById(R.id.ProgressBar01);
    upload = (Button) findViewById(R.id.button1);
    upload.setOnClickListener(this);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
  }

  @Override
  public void onClick(View v) {
    HttpMultipartPost task = new HttpMultipartPost(this);
    task.execute();
  }

}

HttpMultipartPost.java

package com.example.upload;

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 android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;

import com.example.upload.CustomMultiPartEntity.ProgressListener;

public class HttpMultipartPost extends AsyncTask<HttpResponse, Integer, String> {
  ProgressDialog pd;
  long totalSize;
  Context context;

  public HttpMultipartPost(Context context) {
    this.context = context;
  }

  @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(HttpResponse... arg0) {
    HttpClient httpClient = new DefaultHttpClient();
    HttpContext httpContext = new BasicHttpContext();
    HttpPost httpPost = new HttpPost(MainActivity.url);

    try {
      CustomMultiPartEntity multipartContent = new CustomMultiPartEntity(new ProgressListener() {
        @Override
        public void transferred(long num) {
          publishProgress((int) ((num / (float) totalSize) * 100));
        }
      });

      // We use FileBody to transfer an image
      multipartContent.addPart("file", new FileBody(new File(MainActivity.path)));
      totalSize = multipartContent.getContentLength();

      // Send it
      httpPost.setEntity(multipartContent);
      HttpResponse response = httpClient.execute(httpPost, httpContext);
      String serverResponse = EntityUtils.toString(response.getEntity());

      // ResponseFactory rp = new ResponseFactory(serverResponse);
      // return (TypeImage) rp.getData();

      return serverResponse;
    }

    catch (Exception e) {
      System.out.println(e);
    }
    return null;
  }

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

  @Override
  protected void onPostExecute(String ui) {
    pd.dismiss();
  }
}