package com.example.progressbar;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.ProgressBar;public class MainActivity extends Activity {    private int[] data=new int[100];    int hasData=0;    //记录完成进度    int status=0;    ProgressBar bar,bar1;    //創建一个负责更新进度的handler    Handler mhandler=new Handler(){         public void handleMessage(Message msg) {             if(msg.what==0x111){                    bar.setProgress(status);                    bar1.setProgress(status);                }            }            };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    bar=(ProgressBar) findViewById(R.id.bar);    bar1=(ProgressBar) findViewById(R.id.bar1);    new Thread(){        public void run(){            while(status<100){                //获取耗时操作的完成百分比                status=doWork();                //发送消息                mhandler.sendEmptyMessage(0x111);                            }        }    }.start();    }    public int doWork() {        data[hasData++]=(int) (Math.random()*100);        try {            Thread.sleep(100);        } catch (InterruptedException e) {            e.printStackTrace();        }        return hasData;    }}

只里面用到了线程，handler的知识。