Touchevent run false

Question

遊戲是，用戶試圖在洞中做球。

1. touchCounter出錯了，我希望用戶只有2次嘗試，當我在遊戲中運行該代碼時，用戶有更多的嘗試，什麼是錯誤？

final int MAX_TRY_COUNT = 2; 
int counter = 0; 

@Override 
    public boolean onTouchEvent(MotionEvent event) { 
    float currentX = event.getX(); 
    float currentY = event.getY(); 
    float deltaX, deltaY; 
    float scalingFactor = 1.0f/((box.xMax > box.yMax) ? box.yMax : box.xMax); 



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

       counter = 2; 

    if (currentX >= previousX) { 
    deltaX = currentX - previousX; 
    ball.speedX += deltaX * scalingFactor;  
    } else if (previousX >= currentX) { 
    deltaX = previousX - currentX; 
    ball.speedX += deltaX * scalingFactor; 
    } if (currentY >= previousY) { 
    deltaY = currentY - previousY; 
    ball.speedX += deltaY * scalingFactor;  
    } else if (previousY >= currentY) { 
    deltaY = previousY - currentY; 
    ball.speedY += deltaY * scalingFactor; 
    } 




       break;    
     case MotionEvent.ACTION_UP: 

if (counter >= MAX_TRY_COUNT){ 
       // Alert message 
       return; 
      } 
      counter++; 

     } 



    // Save current x, y 
    previousX = currentX; 
    previousY = currentY; 
    return true; // Event handled 
    } 

Answer 1

您需要兩個變量來處理它。

final int MAX_TRY_COUNT = 2; 
int counter = 0; 

在ACTION_DOWN事件

If(counter >= MAX_TRY_COUNT){ 
    // Alert message 
    return; 
} 
counter++; 

，並刪除touch_counter = 1從ACTION_UP