Android学习笔记(4)——基本控件之ProgressBar(2)

      private ProgressBar  bar3 = (ProgressBar)findViewById(R.id.bar3);
      private ProgressBar  bar4 = (ProgressBar)findViewById(R.id.bar4);
        
        start = (Button)findViewById(R.id.start);
        start.setOnClickListener(new Button.OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                if(i==0){
                    bar1.setVisibility(View.VISIBLE); //设置可见
                    bar2.setVisibility(View.VISIBLE);
                    bar3.setVisibility(View.VISIBLE);
                    bar4.setVisibility(View.VISIBLE);
                }else if(i<100){
                    bar1.setProgress(i);
                    bar1.setSecondaryProgress(i+10);  //设置辅进度条  
                    bar2.setProgress(i);
                    bar3.setProgress(i);
                    bar4.setProgress(i);
                }else{
                    bar1.setVisibility(View.GONE);
                    bar2.setVisibility(View.GONE);
                    bar3.setVisibility(View.GONE);
                    bar4.setVisibility(View.GONE);