由网友(陷阱里的王子)分享简介:我有一个形象,它可以左右移动和缩放捏的手势......所有这一切都在 onTouch做()。我想限制这一点,并使其移动(和可扩展性)只有在用户方面做的图像上的longclick。如何做到这一点?I have an image, which can be moved around and scaled with pin...
我有一个形象,它可以左右移动和缩放捏的手势......所有这一切都在 onTouch做()
。我想限制这一点,并使其移动(和可扩展性)只有在用户方面做的图像上的longclick。如何做到这一点?
I have an image, which can be moved around and scaled with pinch gesture.. All this is done inside onTouch()
. I want to restrict this and make it movable(and scalable) only after the user has done a longclick on the image.. How do I do this?
推荐答案
注册一个的 LongCLickListener 。如果长按是公认设置一个标志,真正的。
Register a LongCLickListener. If a long click is recognized set a flag to true.
在OnTouch方法允许缩放和移动仅当该标志被设置为true。之后,在移动和缩放再次设置标志设置为false。
In the OnTouch method allow scaling and moving only if the flag is set to true. After the moving and scaling set the flag to false again.
下面是一些伪code:
Here is some pseudocode:
public class MyActivity extends Activity {
private boolean longClick = false;
public boolean onTouch(View v, MotionEvent event) {
if (longClick) {
// do scaling and moving ...
longClick = false;
}
return false;
}
public boolean onLongClick(View v) {
longClick = true;
return false;
}
}
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