Disable ScrollView Programmatically

Question

I would like to enable ScrollView and disable it by a Button Click  Disable means like if the ScrollView wasn t there   and enable it returns the ScrollView     I want that because I have a gallery with text images  and on a button click the screen orientation changes  so in Landscape the text becomes bigger  And I want the ScrollView so the image does not stretch itself and the text becomes unreadable   scrollview Enabled false   setVisibility false  doesnt make anything    xml    lt ScrollView  android id    id QuranGalleryScrollView   android layout height  fill parent   android layout width  fill parent  gt   lt Gallery android id    id Gallery   android layout width  fill parent   android layout height  fill parent  android scrollbars  horizontal  gt  lt  Gallery gt   lt  ScrollView gt    Thanks  Edit1  I can t use Visibility  gone  since that would also hide the Gallery  what I want is to hide the effect of the ScrollView  When there is ScrollView the images in Gallery become scrollabale and do not fit in the screen so u have to scroll to see the whole image  I don t want to disable enable that on a button click    I tried this     ScrollView findViewById R id QuranGalleryScrollView   setOnTouchListener null                             ScrollView findViewById R id QuranGalleryScrollView   setHorizontalScrollBarEnabled false                             ScrollView findViewById R id QuranGalleryScrollView   setVerticalScrollBarEnabled false                             ScrollView findViewById R id QuranGalleryScrollView   setEnabled false     But still the images in the Gallery are scrollable and not fit the screen   whats the solution to this

User · Answer

Override   public boolean onInterceptTouchEvent MotionEvent ev        switch  ev getAction               case MotionEvent ACTION DOWN                      if we can scroll pass the event to the superclass               if  mScrollable  return super onInterceptTouchEvent ev                    only continue to handle the touch event if scrolling enabled             return mScrollable     mScrollable is always false at this point              default                        return super onInterceptTouchEvent ev

User · Answer

I may be late but still    This answer is based on removing and adding views dynamically To disable scrolling  View child   scoll getChildAt 0     since scrollView can only have one direct child ViewGroup parent    ViewGroup  scroll getParent    scroll removeView child      remove child from scrollview parent addView child parent indexOfChild scroll      add scroll child at the position of scrollview parent removeView scroll     remove scrollView from parent  To enable ScrollView just reverse the process

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Here is a simpler solution  Override the onTouch   for the ScrollView OnTouchListener and return false if you want to bypass the scroll by touch  The programmatic scrolling still works and no need to extend the ScrollView class   mScroller setOnTouchListener new OnTouchListener      Override public boolean onTouch View v  MotionEvent event      return isScrollable

User · Answer

on button click listener just do   ScrollView sView    ScrollView findViewById R id ScrollView01    sView setVerticalScrollBarEnabled false   sView setHorizontalScrollBarEnabled false     so that scroll bar is not enabled on button click

User · Answer

You can extend the gallery and use some flag to disable scrolling when you want   public class MyGallery extends Gallery    public boolean canScroll   public MyGallery Context context  AttributeSet attrs        canScroll   true      super context  attrs      public void setCanScroll boolean flag        canScroll   flag      Override public boolean onScroll android view MotionEvent e1  android view MotionEvent e2  float distanceX  float distanceY        if  canScroll          return super onScroll e1 e2 distancex distancey       else         return false      Override public boolean onSingleTapUp MotionEvent e        if  canScroll          return super onSingleTapUp ey       else         return false      Override public boolean onFling MotionEvent e1  MotionEvent e2  float velocityX  float velocityY        if  canScroll          return super onFling e1 e2 velocityX velocityY       else         return false

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I had gone this way           scrollView setOnTouchListener new View OnTouchListener               Override         public boolean onTouch View v  MotionEvent event                   TODO Auto-generated method stub             return isBlockedScrollView

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public class LockableScrollView extends ScrollView        private boolean mScrollable   true       public LockableScrollView Context context            super context              public LockableScrollView Context context  AttributeSet attrs            super context  attrs              public LockableScrollView Context context  AttributeSet attrs  int defStyleAttr            super context  attrs  defStyleAttr               RequiresApi api   Build VERSION CODES LOLLIPOP      public LockableScrollView Context context  AttributeSet attrs  int defStyleAttr  int defStyleRes            super context  attrs  defStyleAttr  defStyleRes              public void setScrollable boolean enabled            mScrollable   enabled             public boolean isScrollable             return mScrollable              Override     public boolean onTouchEvent MotionEvent ev            return mScrollable  amp  amp  super onTouchEvent ev               Override     public boolean onInterceptTouchEvent MotionEvent ev            return mScrollable  amp  amp  super onInterceptTouchEvent ev

User · Answer

Disablend ScrollView   ScrollView sw    ScrollView  findViewById R id scrollView1   sw setOnTouchListener new OnTouchListener          Override     public boolean onTouch View v  MotionEvent event            return true

User · Answer

JosephEarl  1 He has a great solution here that worked perfectly for me with some minor modifications for doing it programmatically     Here are the minor changes I made   LockableScrollView Class   public boolean setScrollingEnabled boolean enabled        mScrollable   enabled      return mScrollable      MainActivity   LockableScrollView sv    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       sv   new LockableScrollView this       sv setScrollingEnabled false

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I had a layout over the NestedScrollView consuming the touch event and disable the scroll   progressBarLayout setOnTouchListener new View OnTouchListener                  Override             public boolean onTouch View view  MotionEvent motionEvent                    return true                              and to enable    progressBarLayout setOnTouchListener null

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I don t have enough points to comment on an answer  but I wanted to say that mikec s answer worked for me except that I had to change it to return  isScrollable like so   mScroller setOnTouchListener new OnTouchListener          Override     public boolean onTouch View v  MotionEvent event          return  isScrollable

User · Answer

Several points to begin with    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  The Gallery component scrolls horizontally regardless of whether it is in a ScrollView or not - a ScrollView provides only vertical scrolling  you need a HorizontalScrollView for horizontal scrolling  You seem to say you have a problem with the image stretching itself -- this has nothing to do with the ScrollView  you can change how an ImageView scales with the android scaleType property  XML  or the setScaleType method - for instance ScaleType CENTER will not stretch your image and will center it at it s original size    You could modify ScrollView as follows to disable scrolling  class LockableScrollView extends ScrollView                    true if we can scroll  not locked         false if we cannot scroll  locked      private boolean mScrollable   true       public void setScrollingEnabled boolean enabled            mScrollable   enabled             public boolean isScrollable             return mScrollable              Override     public boolean onTouchEvent MotionEvent ev            switch  ev getAction                  case MotionEvent ACTION DOWN                     if we can scroll pass the event to the superclass                 return mScrollable  amp  amp  super onTouchEvent ev               default                  return super onTouchEvent ev                         Override     public boolean onInterceptTouchEvent MotionEvent ev               Don t do anything with intercepted touch events if            we are not scrollable         return mScrollable  amp  amp  super onInterceptTouchEvent ev              You would then use    lt com mypackagename LockableScrollView      android id    id QuranGalleryScrollView       android layout height  fill parent       android layout width  fill parent  gt        lt Gallery android id    id Gallery           android layout width  fill parent           android layout height  fill parent          android scrollbars  horizontal  gt       lt  Gallery gt    lt  com mypackagename LockableScrollView gt    in your XML file  just changed the ScrollView to your special LockableScrollView    Then call    LockableScrollView findViewById R id QuranGalleryScrollView   setScrollingEnabled false     to disable scrolling of the view   I think that you have more than just the issue of disabling scrolling though to achieve your desired result  the gallery will remain scrollable with the above code for instance  - I d recommend doing some more research on each of the three components  Gallery  ScrollView  ImageView  to see what properties each one has and how it behaves

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Does this help     ScrollView findViewById R id QuranGalleryScrollView   setOnTouchListener null

User · Answer

You can make a CustomScrollView  for which you can disable its interference with other views  Though this can be sometimes irritating for the end user  Use it with caution   This is the code   import android content Context  import android util AttributeSet  import android view MotionEvent  import android view ViewParent   public class CustomScrollView extends android widget ScrollView        public CustomScrollView Context context            super context              public CustomScrollView Context context  AttributeSet attrs            super context  attrs              public CustomScrollView Context context  AttributeSet attrs  int defStyle            super context  attrs  defStyle               Override     public boolean onInterceptTouchEvent MotionEvent ev                   Prevent parent controls from stealing our events once we ve gotten a touch down            if  ev getActionMasked      MotionEvent ACTION DOWN                        ViewParent p   getParent                if  p    null                  p requestDisallowInterceptTouchEvent true                      return false            How to use the CustomScrollView   You can add CustomScrollView as a parent to the screen in which you want to add another Scrollview as a child view  and the whole screen is scrollable  I used this for a RelativeLayout    lt  xml version  1 0  encoding  utf-8   gt   lt   package   CustomScrollView  xmlns android  http   schemas android com apk res android      android id    id some id      android layout width  fill parent      android layout height  fill parent      xmlns tools  http   schemas android com tools  gt       lt RelativeLayout         android layout width  match parent          android layout height  wrap content  gt         Inside this I had a TableLayout and TableRow  Inside the TableRow           I had a TextView which I made scrollable from Java Code           textView setMovementMethod new ScrollingMovementMethod            lt  RelativeLayout gt   lt  ankit inventory ankitarora inventorymanagementsimple CustomScrollView gt    It worked for my case

User · Answer

Found this simple solution just set   ScrollView requestDisallowInterceptTouchEvent true

User · Answer

As you can see in the documentation  you cannot set the visibility to false  In your case you should probably use   scrollview setVisibility Visibility GONE

User · Answer

to start  i used the Code posted posted in the first Comment but i changed it like this       public class LockableScrollView extends ScrollView        public LockableScrollView Context context  AttributeSet attrs  int defStyle            super context  attrs  defStyle              TODO Auto-generated constructor stub           public LockableScrollView Context context  AttributeSet attrs                 super context  attrs              public LockableScrollView Context context                 super context                 true if we can scroll  not locked         false if we cannot scroll  locked      private boolean mScrollable   true       public void setScrollingEnabled boolean enabled            mScrollable   enabled             public boolean isScrollable             return mScrollable              Override     public boolean onTouchEvent MotionEvent ev            switch  ev getAction                  case MotionEvent ACTION DOWN                     if we can scroll pass the event to the superclass                 if  mScrollable  return super onTouchEvent ev                      only continue to handle the touch event if scrolling enabled                 return mScrollable     mScrollable is always false at this point             default                  return super onTouchEvent ev                       Override   public boolean onInterceptTouchEvent MotionEvent ev        switch  ev getAction               case MotionEvent ACTION DOWN                      if we can scroll pass the event to the superclass               if  mScrollable  return super onInterceptTouchEvent ev                    only continue to handle the touch event if scrolling enabled             return mScrollable     mScrollable is always false at this point              default                        return super onInterceptTouchEvent ev                                  then i called it in by this way    LockableScrollView findViewById R id scrollV   setScrollingEnabled false     because i tried     LockableScrollView findViewById R id scrollV   setIsScrollable false     but it said that setIsScrollable is undefined  i hope this will help you

[android] Disable ScrollView Programmatically?

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