I'm trying to create collapsable calendar.
I'm using custom calendarView in ViewPager, so when expand/collapse button pressed my calendarView animate collapsing all calendar weeks except only one.
Goal is to swipe month when expanded (which works as i want) and swipe weeks when collapsed.
Below calendarView is ListView with some events, when user collapse calendar - listView height must change.
Problem is when i trying to collapse calendarView in ViewPager, he doesn't change height.
calendarView is a LinearLayout with child views, when it is not in ViewPager, it animating and changing size.
I'm using little snippet to set ViewPager height to it children
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = 0;
for(int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int h = child.getMeasuredHeight();
if(h > height) height = h;
}
heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
I'm tried to override onMeasure on calendarView, used different animations, tried to change ViewPager layout directly but no luck.
Please help me with this problem, maybe there is a tip for it.
I found this, this, this, and a lot more questions
My question is very similar to this question
So finally i figured out how to resolve my problem, maybe it will be helpfull.
here is my PagerAdapter:
class CustomAdapter extends PagerAdapter {
private View mCurrentView;
...
// Saving current active item
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {
mCurrentView = (View) object;
}
public View getCurrentItem() {
return mCurrentView;
}
}
And this is my ViewPager class
class CustomViewPager extends ViewPager {
private CustomViewPagerAdapter mAdapter;
...
// Set ViewPager height to currentItem
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = 0;
View v = mAdapter.getCurrentItem();
if(v != null) {
v.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
height = v.getMeasuredHeight();
}
heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
With this i can collapse/expand ViewPager childs and it will be measure its height correctly, and it measures when page is changed with a little delay.
来源:https://stackoverflow.com/questions/25674124/viewpager-with-expandable-child