<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.progressbar.MainActivity$PlaceholderFragment" >    <LinearLayout        android:orientation="horizontal"          android:layout_width="match_parent"    android:layout_height="wrap_content">    <!-- 定义一个大环形进度条 -->    <ProgressBar        style="?android:attr/progressBarStyleLarge"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />  <!-- 定义一个普通环形进度条 -->    <ProgressBar        android:layout_width="wrap_content"        android:layout_height="wrap_content" />  <!-- 定义一个小环形进度条 -->    <ProgressBar         style="?android:attr/progressBarStyleSmall"        android:layout_width="match_parent"        android:layout_height="wrap_content" /></LinearLayout>    <TextView         android:layout_width="match_parent"        android:layout_height="wrap_content"       android:text="@string/progress"         />    <!-- 水平进度条 -->    <ProgressBar        android:id="@+id/bar1"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"         android:max="100" />    <!-- 自定义水平进度条 -->    <ProgressBar       android:id="@+id/bar"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:progressDrawable="@drawable/my_bar"         android:max="100" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android" >    <!-- 定义轨道背景 -->    <item android:id="@android:id/background"        android:drawable="@drawable/no"></item><item android:id="@android:id/progress"        android:drawable="@drawable/ok"></item></layer-list>

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=http://www.mamicode.com/new int[100];    int hasData=http://www.mamicode.com/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;    }}