菜鸟Android学习之路17-进度条的显示

时间:2022-01-11 03:04:14

private ProgressBar horizonBar;
 private ProgressBar circleBar;
 private int mProgressStatus;//显示的进度值
 private Handler mHandler;//声明一个处理消息的Handler类对象

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  horizonBar = (ProgressBar)findViewById(R.id.progressBar1);
  circleBar = (ProgressBar)findViewById(R.id.progressBar2);
  horizonBar.incrementProgressBy(-10);
  horizonBar.setVisibility(View.VISIBLE);
  mHandler = new Handler(){
   @Override
   public void handleMessage(Message msg){
    if(msg.what == 0x111){
     horizonBar.setProgress(mProgressStatus);
     circleBar.setProgress(100-mProgressStatus);
    }else{
     Toast.makeText(MainActivity.this, "耗时已经完成", Toast.LENGTH_SHORT).show();
     horizonBar.setVisibility(View.GONE);
     circleBar.setVisibility(View.GONE);
    }
   }
  };
  new Thread(new Runnable() {
   
   @Override
   public void run() {
    while(true){
     mProgressStatus = doWork();// TODO Auto-generated method stub
     Message msg = new Message();
     if(mProgressStatus < 100){
      msg.what = 0x111;
      mHandler.sendMessage(msg);
      }else{
       msg.what = 0x110;
       mHandler.sendMessage(msg);
      }
    }
    
   }
   private int doWork(){
    mProgressStatus+=Math.random()*10;
    try{
     Thread.sleep(200);
    }catch(InterruptedException e){
     e.printStackTrace();
    }
    return mProgressStatus;
   }
  }).start();
 }

效果如下:


菜鸟Android学习之路17-进度条的显示