Develop Reference

How can I disable ScrollView scrolling if it's not needed?

My UI consists of a ScrollView that takes the top 50% of the screen and under that two buttons that are attached to the bottom of the screen; YES and NO. The content of Scrollview is text that for most phones does not fill up the visual area of the ScrollView. However sometimes the text can be longer, such that it fills beyond the visual area of the ScrollView, hence the reason I added the ScrollView.
My problem is this; even when the ScrollView has very little text and does not need to scroll to show all of its content it still scrolls. The user can scroll the content up a slight amount. I'd like the View to instead not allow any scrolling if all the content is visible.
Is there an easy way to achieve this? Or do I have to implement that myself?

You cannot disable the scrolling of a ScrollView. You would need to extend to ScrollView and override the onTouchEvent method to return false when some condition is matched. To get help with extending, please read the answers to Disable ScrollView Programmatically?

How put Horizontal View and Gridview inside Vertical Scrollview

I want to develop an app that includes GridView and I want it to be some thing like horizontal ListView above a gridvew .Horizontal view displays images downloaded from url.I saw this touturial ( horizontal scrollview used)
and saw this to put the GridView inside scrollView because i want to put the gridview(episode #2) and horizontal view (episode #1) in vertical scrollview(episode #3) . I need to scroll the horizontal view vertically when a user is scrolling the gridview and not to have fixed position at the top of the screen.
I have no idea how to do this (use horizontal ScrollView or horizontal Listview)?
after vertical scrolling I want it to be like this (horizontal view must get scrolled vertically):

This is a custom interaction, so you probably will not be able to use a "standard" tool for this. You may want something like the FloatingActionButton (an example here: http://antonioleiva.com/collapsing-toolbar-layout/) but you also want it to scroll, so you may need to extend that class.
Also, you could use touch events to do a custom animation on the area, because you will need to track when it is displayed and the direction/distance of the motion event to collapse/expand it. You also would need to know anchors on the list, to determine when it should reappear...
This is a cool design concept, but usually "cool" = "difficult" because it's not standard.

Is it possible to have a ScrollView inside another ScrollView?

I want to learn how to solve this problem. I want to have a Horizontal scrollview with the scroll blocked (the user should not be able to scroll it) and inside that horizontal scrollview i want to have another horizontal scroll view, and this scrollview must be able to be scrolled by the user (it haves more content that the width of the screen).
Is it possible to do it?
I tried using this on the parent horizontal scroll view:
((HorizontalScrollView) view).setHorizontalScrollBarEnabled(false);
((HorizontalScrollView) view).setEnabled(false);
((HorizontalScrollView) view).setFocusable(false);
((HorizontalScrollView) view).setFocusableInTouchMode(false);
and this on the child horizontal scroll view:
((HorizontalScrollView) view).requestFocus();
It is not working, the child appears to have a scroll bar, but it cannot be scrolled.
How can this be solved?
PD: I know that this is not a good practice, but I want to learn how to achieve this goal.

You should never use a
HorizontalScrollView with a ListView,
since ListView takes care of its own
scrolling. Most importantly, doing
this defeats all of the important
optimizations in ListView for dealing
with large lists, since it effectively
forces the ListView to display its
entire list of items to fill up the
infinite container supplied by
HorizontalScrollView.
http://developer.android.com/reference/android/widget/HorizontalScrollView.html
UPDATE:
Since you may be forced to use a two dimensional scrollview, you may consider using this:
http://blog.gorges.us/2010/06/android-two-dimensional-scrollview/
I haven't used this but it may be a reasonable approach.

you can do it. But you have to handle child layouts in scrollview i.e ScrollView can host only one direct child.

How to apply gesture inside scrollview in Android

I am developing Android application which contains the reading of epub books. In that I need to place two pages in book view. If those pages exceed the screen size user have to scroll and view the books and have to pinch zoom the book and user can pan the book for reading.
At first I tried to place two webview inside the Relativelayout. I can achieve this by placing relativelayout inside the scrollview and horizontal scrollview to scroll in both horizontal and vertical.
But problem occur in the swipping of pages and pinchzoom is not working inside the scrollview; it remains in the first page itself. I don't know where I am going wrong.

Are you putting WebView inside ScrollView? It functions funny that way. You'll have to disable the outside ScrollView if you're doing so.
You can modify ScrollView to be lockable, as in here.

how to enable vertical scroling of web view layout with in scrollview tag

I have problem in scrolling of webview vertically when it's scrolled along vertically,where this webview is with in scrollview tag,how can i enable the scrolling for webview and to disable the scrolling of whole layout when its on webview contained layout.

Because of the way touch events are consume in android it is not recommended or even really possible to have two Views that consume and react to the same move events in the same axis. In other words, you cannot put a WebView in a ScrollView. You would not be able to put a ListView in a ScrollView and have it work either since they both scroll vertically.