我如何设置边界,以便使用acclerometer移动的图像只能移动一定距离?真的需要帮助已经尝试了一段时间,没有在哪里。我有一个用我的加速度计移动的图像,但我想设置边界,所以它只在它们内移动,例如我不希望它向后移动,只有一定距离向左,向右和向前。
答案 0 :(得分:1)
这里你没有代码,但一般的答案是简单地跟踪旧位置。
例如:
// view is the view you are working with
int currentLeft = view.getLeft();
int currentTop = view.getTop():
// get new desired positions here using accelerometer, you must insert your code.
int newLeft;
int newTop;
// do any checks you want here, for example, I am only going to allow moving right
if (newLeft >= currentLeft){
// move the view and do whatever you want
}else{
// don't allow movement and do what you want here
}
// update new positions
int currentLeft = view.getLeft();
int currentTop = view.getTop():