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 = "https://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();
	}

}
package com.example.uplo