用较短的拖动使ViewPager对齐
it1352
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问题说明
是否可以通过较短的拖动使支持包ViewPager捕捉到下一页?默认行为似乎是，即使我拖动了将近75％的页面，放开时页面仍会跳回到上一页.我想缩短捕捉阈值，并改为将ViewPager捕捉到下一页.
Is there any way to make the support package ViewPager snap to the next page with a shorter drag? The default behaviour seems to be that even if I drag almost 75% the page still snaps back to the previous page when I let go. I'd like to make the snap threshold shorter and make the ViewPager snap to the next page instead.
请注意，这适用于拖动手势.挥动手势已经需要更短的手势.
Note that this applied to drag gesture. A fling gesture requires much shorter gesture already.
正确答案
#1
您可以临时执行此操作，而不必担心ViewPager的内部结构，只要您想增加目标区域即可:
You can do this ad-hoc, without worrying too much about the internals of ViewPager as long as you want to increase the target zone:
private class MyPageChangeListener implements OnPageChangeListener {
private float mLastPositionOffset = 0f;
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if(positionOffset < mLastPositionOffset && positionOffset < 0.9) {
mViewPager.setCurrentItem(position);
} else if(positionOffset > mLastPositionOffset && positionOffset > 0.1) {
mViewPager.setCurrentItem(position 1);
}
mLastPositionOffset = positionOffset;
}
}
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