问题描述
我肯定有关于它的帖子,我以前浏览过它们,但现在找不到了.
I am sure that there are some posts about it, and I skimmed through them before, but now I cannot find them.
我想检测用户从页面边缘(例如左边缘)滑动Viewpager时的操作.我想对这种滑动进行一些特殊的处理,例如显示菜单.
I want to detect the action when the user swipes the viewpager from edge of a page (such as left edge). I want to do some special handling for this kind of swipe, such as showing menu.
是否有ViewPager内置(?)支持?我隐约记得它是.否则,我必须实现自己的逻辑来检测这些动作.
Is there any ViewPager built-in(?) support for it? I vaguely remembered it is. Otherwise, I have to implement my own logic to detect those action.
有人可以给我一些信息吗?
Can anyone point me some info?
推荐答案
我认为,您应该重写ViewPager容器的几种方法.例如,如果是LinearLayout
I think, you should override few methods of the container of your ViewPager. For example if it is LinearLayout
public class Liner extends LinearLayout {
public Liner(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
//Remember start points
float mInitX;
float mInitY;
// TouchSlop value
float mSomeValue=20F;
//
boolean mCatched=false;
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitX=ev.getX();
mInitY=ev.getY();
break;
default:
break;
}
mCatched=mInitX<10 && Math.abs(ev.getX()-mInitX)>mSomeValue;
return mCatched;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if(mCatched){
//Do all you want here
}
return true;
}
}
如果您与 TeRRo 结合使用(将其检测器放在onTouchEvent()内),您可能会得到不错的结果.但是使用DrawerLayout的最佳方法.
If you combine with TeRRo anrwer (put his detector inside onTouchEvent()) you may have good result. But best way to use DrawerLayout.
祝你好运!
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