Worm

一个可以使用重力感应或触摸手势控制的贪食蛇游戏.

代码片段：

@Override
public boolean onTouchEvent(MotionEvent event) {
    if(gravityCnotrol) return false;
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            startX = event.getX();
            startY = event.getY();
            break;
        case MotionEvent.ACTION_UP:
            float currentX = event.getX();
            float currentY = event.getY();
            float deltaX = currentX - startX;
            float deltaY = currentY - startY;
            float absDeltaX = Math.abs(deltaX);
            float absDeltaY = Math.abs(deltaY);

            if(absDeltaX > mTouchSlop || absDeltaY > mTouchSlop) {
                if(absDeltaX > absDeltaY) {// x
                    if(deltaX < 0) {//left
                        direction = DIR_LEFT;
                    }else {
                        direction = DIR_RIGHT;
                    }
                }else {//Y
                    if(deltaY < 0) { //top
                        direction = DIR_UP;
                    }else {
                        direction = DIR_DOWN;
                    }
                }
            }
            break;
    }

    return true;
}