Android ProgressBar进度条和ProgressDialog进度框的展示DEMO

在做手机开发时，经常碰到一些比较耗时的操作，这个时候进度条就开始派上用场了。
这个demo展示了progressbar进度条和progressdialog进度框。
一、progressdialog进度框，效果如图所示：

代码如下：

//进度对话框按钮监听
     class prossbuttonlistener implements onclicklistener {
         @override
         public void onclick(view v) {
             mydialog = progressdialog.show(progressbardemo.this, "进度条标题",
                     "进度条内容", true);

             new thread() {
                 public void run() {
                     try {
                         /* 在这里写上要背景运行的程序片段 */
                         /* 为了明显看见效果，以暂停3秒作为示范 */
                         sleep(3000);
                     } catch (exception e) {
                         e.printstacktrace();
                     } finally {
                         // 卸载所创建的mydialog对象。
                         mydialog.dismiss();
                     }
                 }
             }.start(); /* 开始运行运行线程 */
         }
     }

二、进度条对话框，这里用两种情况来动态显示进度条刻度
1、handle方法
效果图如下：

代码如下：

//进度条handle按钮监听
     class prossbarhandlebuttonlistener implements onclicklistener {
         @override
         public void onclick(view v) {
             progressbarhandle.setvisibility(view.visible);
             myprossbarhandletext.setvisibility(view.visible);
             progressbarhandle.setmax(1000);
             new thread() {
                 public void run() {
                     for(int i=0;i<=1000;){
                     try {
                         /* 在这里写上运行的进度条 */
                         message msg = new message();
                         msg.what = 1;
                         msg.getdata().putint("size", i);
                         handler.sendmessage(msg);//handle发送消息
                         /* 为了明显看见效果，以暂停1秒作为示范 */
                         sleep(100);
                         i+=10;
                     } catch (exception e) {
                         handler.obtainmessage(-1).sendtotarget();
                         e.printstacktrace();
                     } 
                 }
                 }
             }.start(); /* 开始运行运行线程 */
         }
     }

     //handle接收消息
      private handler handler = new handler(){

             @override
             public void handlemessage(message msg) {           
                 switch (msg.what) {
                 case 1:               
                     progressbarhandle.setprogress(msg.getdata().getint("size"));
                     float num = (float)progressbarhandle.getprogress()/(float)progressbarhandle.getmax();
                     int result = (int)(num*100);
                     system.out.println("progressbarhandle.getprogress()======="+progressbarhandle.getprogress());
                     myprossbarhandletext.settext(result+ "%");
                     if(progressbarhandle.getprogress()==progressbarhandle.getmax()){
                         toast.maketext(progressbardemo.this, "下载成功", 1).show();
                         progressbarhandle.setvisibility(view.gone);
                         myprossbarhandletext.setvisibility(view.gone);
                     }
                     break;

                 case -1:
                     toast.maketext(progressbardemo.this,"下载失败", 1).show();
                     break;
                 }
             }
         };

2、使用asynctask方法，效果图与handle效果一样
具体代码如下：

//进度条synctask按钮监听
     class prossbarsyncbuttonlistener implements onclicklistener {
         @override
         public void onclick(view v) {
              new asyncloader().execute((void)null); 
         }
     }

      
      //asynctask 任务执行
     class asyncloader extends asynctask<void, integer, integer> {
         @override
 //         在doinbackground方法执行前执行
         protected void onpreexecute(){
             progressbarhandle.setvisibility(view.visible);
             myprossbarhandletext.setvisibility(view.visible);
             progressbarhandle.setmax(100000);
         }

 //        做具体的耗时操作
         protected integer doinbackground(void... params) {
             //这里以1万的进度条刻度来显示
             int totalsize = 100000;
             for (int i = 0; i < 100000; ) {
                 publishprogress(i);  //通过推送消息传递数据给onprogressupdate方法执行
                 i+=10;
             }
             return totalsize;
         }
 //        在doinbackground方法执行过程中执行
         protected void onprogressupdate(integer... progress) {
             progressbarhandle.setprogress(progress[0]); 
             float num = (float)progressbarhandle.getprogress()/(float)progressbarhandle.getmax();
             int result = (int)(num*100);
              myprossbarhandletext.settext(result+ "%");
         }

 //        在doinbackground方法结束后执行
         protected void onpostexecute(integer result) {
             toast.maketext(progressbardemo.this, "下载成功，下载了"+result, 1).show();
             myprossbarhandletext.setvisibility(view.gone);
             progressbarhandle.setvisibility(view.gone);
         }
     }

点击下载demo示例