Android：布爾型

Question

我試圖只在按鈕被點擊時畫一個圓。要移動該圓圈，必須單擊一個按鈕才能進行移動。然而，點擊按鈕後，bclick的初始值爲false，但bclick的值始終爲真。如何使它在繪製圓圈後每次都將bclick設置爲false？

我的視圖類：

@Override 
     public boolean onTouchEvent(MotionEvent event) { 

       x = event.getX(); 
       y = event.getY(); 


       switch (event.getAction()) { 
       case MotionEvent.ACTION_DOWN: 


       if (MainActivity.isButtonClicked() == true){ 

             canvas.drawCircle(x, y, radius, paint) 

           invalidate(); 
           } 

          break; 
         case MotionEvent.ACTION_MOVE: 

          lastx = event.getX(); 
          lasty = event.getY(); 
       if (MainActivity.isMoveButtonClicked() == true && Mainactivity.is ButtonCLicked() == false){ 

             canvas.drawCircle(lastx, lasty, radius, paint) 

        invalidate();// if this is used, the moving is slow and doesnt move to the exact spot at (lastx, laxyy) 
           } 

          break; 
      } 

我的MainActivity：

boolean bclick =false; 
    boolean mbclick =false; 

drawbutton.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 

      bclick = true; 

      } 


     }); 

     bclick = false; 

       movebutton.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 

        mbclick = true; 

      } 


     }); 

       mbclick = false; 


public static boolean isButtonClicked() { 
     return bclick; 
    } 

public static void setButtonClicked(boolean torf) 
    { 
     bclick = torf; 
    } 

public static boolean isMoveButtonClicked() { 
     return mbclick; 
    } 

public static void setMoveButtonClicked(boolean torf) 
    { 
     mbclick = torf; 
    } 

Answer 1

您可以創建畫圓，並檢查它的方法，

if(circleIsDrawn){ 

     bClick = false; 

} 

Answer 2

@Override 
public boolean onTouchEvent(MotionEvent event) { 

     x = event.getX(); 
     y = event.getY(); 


     switch (event.getAction()) { 
     case MotionEvent.ACTION_DOWN: 

     if (MainActivity.isButtonClicked() == true){ 

           canvas.drawCircle(x, y, radius, paint) 
           bClick=false; 
         invalidate(); 
         } 

        break; 
    }