Android兩種實現介面的重新整理操作的方法

利用Handler重新整理介面

執行個體化一個Handler對象，並重寫handleMessage方法調用invalidate()實現介面重新整理；而線上程中通過sendMessage發送介面更新訊息。

 

  
// 在onCreate()中開啟線程 
  
       new Thread(new GameThread()).start();、 
  
  
  
 
  
       // 執行個體化一個handler 
  
       Handler myHandler   = new Handler()  
  
       { 
  
              //接收到訊息後處理 
  
              public void handleMessage(Message msg) 
  
              { 
  
                     switch (msg.what) 
  
                     { 
  
                     case Activity01.REFRESH: 
  
                            mGameView.invalidate();        //重新整理介面 
  
                            break; 
  
                     } 
  
                     super.handleMessage(msg); 
  
              }                    
  
       }; 
  
  
  
 
  
       class GameThread implements Runnable 
  
       { 
  
              public void run() 
  
              { 
  
                     while (!Thread.currentThread().isInterrupted()) 
  
                     { 
  
                            Message message = new Message(); 
  
                            message.what = Activity01.REFRESH; 
  
                            //發送訊息 
  
                            Activity01.this.myHandler.sendMessage(message); 
  
                            try 
  
                            { 
  
                                   Thread.sleep(100); 
  
                            } 
  
                            catch (InterruptedException e) 
  
                            { 
  
                                   Thread.currentThread().interrupt(); 
  
                            } 
  
                     } 
  
              } 
  
 
  
       } 
 

使用postInvalidate()重新整理介面

使用postInvalidate則比較簡單，不需要handler，直接線上程中調用postInvalidate即可。

 

  
class GameThread implements Runnable 
  
      { 
  
             public void run() 
  
             { 
  
                    while (!Thread.currentThread().isInterrupted()) 
  
                    { 
  
                           try 
  
                           { 
  
                                  Thread.sleep(100); 
  
                           } 
  
                           catch (InterruptedException e) 
  
                           { 
  
                                  Thread.currentThread().interrupt(); 
  
                           } 
  
                           //使用postInvalidate可以直接線上程中更新介面 
  
                           mGameView.postInvalidate(); 
  
                    } 
  
             } 
  
      }