Can I scroll a ScrollView programmatically in Android

Question

Is there any way to scroll a ScrollView programmatically to a certain position   I have created dynamic TableLayout which is placed in a ScrollView  So I want that on a specific action  like clicking a Button  etc   the particular row should scroll automatically to a top position   Is it possible

User · Answer

it s working for me  mScrollView getViewTreeObserver   addOnGlobalLayoutListener new ViewTreeObserver OnGlobalLayoutListener              Override         public void onGlobalLayout                 mScrollView post new Runnable                     public void run                         mScrollView fullScroll View FOCUS DOWN

User · Answer

Try using scrollTo method More Info

User · Answer

private int totalHeight   0   ViewTreeObserver ScrollTr   loutMain getViewTreeObserver    ScrollTr addOnGlobalLayoutListener new ViewTreeObserver OnGlobalLayoutListener          Override     public void onGlobalLayout             if  Build VERSION SDK INT  lt  Build VERSION CODES JELLY BEAN                loutMain getViewTreeObserver   removeGlobalOnLayoutListener this             else               loutMain getViewTreeObserver   removeOnGlobalLayoutListener this                     TotalHeight   loutMain getMeasuredHeight                scrollMain smoothScrollTo 0  totalHeight

User · Answer

I got this to work to scroll to the bottom of a ScrollView  with a TextView inside     I put this on a method that updates the TextView   final ScrollView myScrollView    ScrollView  findViewById R id myScroller       myScrollView post new Runnable         public void run             myScrollView fullScroll View FOCUS DOWN

User · Answer

Yes  you can   Let s say you got one Layout and inside that  you got many Views  So if you want to scroll to any View programmatically  you have to write the following code snippet   For example   content main xml   lt ScrollView     android id    id scrollView      android layout width  match parent      android layout height  wrap content  gt        lt LinearLayout         android layout width  match parent          android layout height  wrap content          android orientation  vertical  gt            lt Button             android id    id btn              android layout width  match parent              android layout height  wrap content    gt            lt TextView             android id    id txtView              android layout width  match parent              android layout height  wrap content    gt        lt  LinearLayout gt   lt  ScrollView gt    MainActivity java  ScrollView scrollView    ScrollView  findViewById R id scrollView   Button btn    Button  findViewById R id ivEventBanner   TextView txtView    TextView  findViewById R id ivEditBannerImage     If you want to scroll to a specific View  let s say txtview  in this case  just write   scrollView smoothScrollTo txtView getScrollX   txtView getScrollY       And you are done

User · Answer

I wanted the scrollView to scroll directly after onCreateView    not after e g  a button click   To get it to work I needed to use a ViewTreeObserver   mScrollView getViewTreeObserver   addOnGlobalLayoutListener new ViewTreeObserver OnGlobalLayoutListener              Override         public void onGlobalLayout                 mScrollView post new Runnable                     public void run                         mScrollView fullScroll View FOCUS DOWN                                                         But beware that this will be called everytime something gets layouted  e g if you set a view invisible or similar  so don t forget to remove this listener if you don t need it anymore with   public void removeGlobalOnLayoutListener  ViewTreeObserver OnGlobalLayoutListener victim  on SDK Lvl  lt  16  or   public void removeOnGlobalLayoutListener  ViewTreeObserver OnGlobalLayoutListener victim  in SDK Lvl    16

User · Answer

There are a lot of good answers here  but I only want to add one thing  It sometimes happens that you want to scroll your ScrollView to a specific view of the layout  instead of a full scroll to the top or the bottom   A simple example  in a registration form  if the user tap the  Signup  button when a edit text of the form is not filled  you want to scroll to that specific edit text to tell the user that he must fill that field   In that case  you can do something like that   scrollView post new Runnable              public void run                   scrollView scrollTo 0  editText getBottom                      or  if you want a smooth scroll instead of an instant scroll   scrollView post new Runnable                  public void run                       scrollView smoothScrollTo 0  editText getBottom                              Obviously you can use any type of view instead of Edit Text  Note that getBottom   returns the coordinates of the view based on its parent layout  so all the views used inside the ScrollView should have only a parent  for example a Linear Layout    If you have multiple parents inside the child of the ScrollView  the only solution i ve found is to call requestChildFocus on the parent view   editText getParent   requestChildFocus editText  editText     but in this case you cannot have a smooth scroll   I hope this answer can help someone with the same problem

User · Answer

Adding another answer that does not involve coordinates   This will bring your desired view to focus  but not to the top position        yourView getParent   requestChildFocus yourView yourView        public void RequestChildFocus  View child  View focused    child - The child of this ViewParent that wants focus  This view will contain the focused view  It is not necessarily the view that actually has focus   focused - The view that is a descendant of child that actually has focus

User · Answer

ScrollView sv    ScrollView findViewById R id scrl   sv scrollTo 0  sv getBottom       or  sv scrollTo 5  10

User · Answer

just page scroll   ScrollView sv    ScrollView  findViewById your scroll view   sv pageScroll View FOCUS DOWN

User · Answer

Note  if you already in a thread  you have to make a new post thread  or it s not scroll new long height till the full end  for me   For ex   void LogMe final String s       runOnUiThread new Runnable             public void run                 connectionLog setText connectionLog getText       n    s               final ScrollView sv    ScrollView connectLayout findViewById R id scrollView               sv post new Runnable                     public void run                         sv fullScroll sv FOCUS DOWN                                              sv scrollTo 0 sv getBottom                         sv scrollBy 0 sv getHeight

User · Answer

The answer from Pragna does not work always  try this   mScrollView post new Runnable              public void run                   mScrollView scrollTo 0  mScrollView getBottom                      or  mScrollView post new Runnable              public void run                   mScrollView fullScroll mScrollView FOCUS DOWN                    if You want to scroll to start   mScrollView post new Runnable              public void run                   mScrollView fullScroll mScrollView FOCUS UP

User · Answer

Use something like this   mScrollView scrollBy 10  10     or  mScrollView scrollTo 10  10

User · Answer

to scroll up to desired height  I have come up with some good solution                     scrollView postDelayed new Runnable                          Override                     public void run                             scrollView scrollBy 0  childView getHeight                                              100

User · Answer

If you want to scroll instantly then you can use    ScrollView scroll   ScrollView findViewById R id scroll   scroll scrollTo 0  scroll getBottom                  OR  scroll fullScroll View FOCUS DOWN                OR  scroll post new Runnable                      Override     public void run                scroll fullScroll View FOCUS DOWN                             Or if you want to scroll smoothly and slowly so you can use this   private void sendScroll            final Handler handler   new Handler            new Thread new Runnable                  Override             public void run                     try  Thread sleep 100    catch  InterruptedException e                     handler post new Runnable                          Override                     public void run                             scrollView fullScroll View FOCUS DOWN                                                                      start

User · Answer

I was using the Runnable with sv fullScroll View FOCUS DOWN   It works perfectly for the immediate problem  but that method makes ScrollView take the Focus from the entire screen  if you make that AutoScroll to happen every time  no EditText will be able to receive information from the user  my solution was use a different code under the runnable   sv scrollTo 0  sv getBottom     sv getScrollY      making the same without losing focus on important views  greetings

User · Answer

I had to create Interface  public interface ScrollViewListener       void onScrollChanged ScrollViewExt scrollView                            int x  int y  int oldx  int oldy          import android content Context  import android util AttributeSet  import android widget ScrollView   public class CustomScrollView extends ScrollView       private ScrollViewListener scrollViewListener   null      public ScrollViewExt Context context            super context              public CustomScrollView  Context context  AttributeSet attrs  int defStyle            super context  attrs  defStyle              public CustomScrollView  Context context  AttributeSet attrs            super context  attrs              public void setScrollViewListener ScrollViewListener scrollViewListener            this scrollViewListener   scrollViewListener              Override     protected void onScrollChanged int l  int t  int oldl  int oldt            super onScrollChanged l  t  oldl  oldt           if  scrollViewListener    null                scrollViewListener onScrollChanged this  l  t  oldl  oldt                          lt  Your Package name   CustomScrollView      xmlns android  http   schemas android com apk res android      xmlns app  http   schemas android com apk res-auto      android id    id scrollView      android layout width  match parent      android layout height  match parent      android focusableInTouchMode  true      android scrollbars  vertical  gt       private CustomScrollView scrollView   scrollView    CustomScrollView mView findViewById R id scrollView           scrollView setScrollViewListener this          Override     public void onScrollChanged ScrollViewExt scrollView  int x  int y  int oldx  int oldy               We take the last son in the scrollview         View view    View  scrollView getChildAt scrollView getChildCount   - 1           int diff    view getBottom   -  scrollView getHeight     scrollView getScrollY                  if diff is zero  then the bottom has been reached         if  diff    0                       do stuff               TODO keshav gers             pausePlayer                videoFullScreenPlayer setVisibility View GONE

User · Answer

Everyone is posting such complicated answers   I found an easy answer  for scrolling to the bottom  nicely   final ScrollView myScroller    ScrollView  findViewById R id myScrollerView       Scroll views can only have 1 child  so get the first child s bottom     which should be the full size of the whole content inside the ScrollView myScroller smoothScrollTo  0  myScroller getChildAt  0   getBottom        And  if necessary  you can put the second line of code  above  into a runnable   myScroller post  new Runnable          Override     public void run             myScroller smoothScrollTo  0  myScroller getChildAt  0   getBottom                It took me much research and playing around to find this simple solution  I hope it helps you  too

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