Is there a way to programmatically scroll a scroll view to a specific edit text

Question

I have a very long activity with a scrollview  It is a form with various fields that the user must fill in  I have a checkbox half way down my form  and when the user checks it I want to scroll to a specific part of the view  Is there any way to scroll to an EditText object  or any other view object  programmatically   Also  I know this is possible using X and Y coords but I want to avoid doing this as the form may changed from user to user

User · Answer

Examining Android source code  you can find that there already is a member function of ScrollView    scrollToChild View      that does exactly what is requested  Unfortunatelly  this function is for some obscure reason marked private  Based on that function I ve written following function that finds the first ScrollView above the View specified as a parameter and scrolls it so that it becomes visible within the ScrollView    private void make visible View view       int vt   view getTop      int vb   view getBottom       View v   view     for                  ViewParent vp   v getParent           if vp    null      vp instanceof ViewGroup            break         ViewGroup parent    ViewGroup vp         if parent instanceof ScrollView                     ScrollView sv    ScrollView parent               Code based on ScrollView computeScrollDeltaToGetChildRectOnScreen Rect rect   Android v5 1 1             int height   sv getHeight             int screenTop   sv getScrollY             int screenBottom   screenTop   height            int fadingEdge   sv getVerticalFadingEdgeLength                 leave room for top fading edge as long as rect isn t at very top          if vt  gt  0              screenTop    fadingEdge               leave room for bottom fading edge as long as rect isn t at very bottom          if vb  lt  sv getChildAt 0  getHeight                screenBottom -  fadingEdge            int scrollYDelta   0            if vb  gt  screenBottom  amp  amp  vt  gt  screenTop                               need to move down to get it in view  move down just enough so                that the entire rectangle is in view  or at least the first                screen size chunk                if vb-vt  gt  height     just enough to get screen size chunk on                scrollYDelta     vt - screenTop               else                 get entire rect at bottom of screen                scrollYDelta     vb - screenBottom                    make sure we aren t scrolling beyond the end of our content             int bottom   sv getChildAt 0  getBottom                int distanceToBottom   bottom - screenBottom              scrollYDelta   Math min scrollYDelta  distanceToBottom                         else if vt  lt  screenTop  amp  amp  vb  lt  screenBottom                               need to move up to get it in view  move up just enough so that                entire rectangle is in view  or at least the first screen                size chunk of it                if vb-vt  gt  height        screen size chunk                scrollYDelta -   screenBottom - vb               else                     entire rect at top                scrollYDelta -   screenTop - vt                   make sure we aren t scrolling any further than the top our content             scrollYDelta   Math max scrollYDelta  -sv getScrollY                            sv smoothScrollBy 0  scrollYDelta            break                      Transform coordinates to parent        int dy   parent getTop  -parent getScrollY          vt    dy        vb    dy         v   parent

User · Answer

You should make your TextView request focus       mTextView requestFocus

User · Answer

In my opinion the best way to scroll to a given rectangle is via View requestRectangleOnScreen Rect  Boolean   You should call it on a View you want to scroll to and pass a local rectangle you want to be visible on the screen  The second parameter should be false for smooth scrolling and true for immediate scrolling   final Rect rect   new Rect 0  0  view getWidth    view getHeight     view requestRectangleOnScreen rect  false

User · Answer

Another varition would be   scrollView postDelayed new Runnable          Override     public void run                 scrollView smoothScrollTo 0  img transparent getTop              2000     or you can use the post   method

User · Answer

If scrlMain is your NestedScrollView  then use the following   scrlMain post new Runnable                          Override                     public void run                             scrlMain fullScroll View FOCUS UP

User · Answer

My EditText was nested several layers inside my ScrollView  which itself isn t the layout s root view   Because getTop   and getBottom   were seeming to report the coordinates within it s containing view  I had it compute the distance from the top of the ScrollView to the top of the EditText by iterating through the parents of the EditText      Scroll the view so that the touched editText is near the top of the scroll view new Thread new Runnable          Override     public     void run                     Make it feel like a two step process         Utils sleep 333               Determine where to set the scroll-to to by measuring the distance from the top of the scroll view            to the control to focus on by summing the  top  position of each view in the hierarchy          int yDistanceToControlsView   0          View parentView    View  m editTextControl getParent            while  true                        if  parentView equals scrollView                                 break                            yDistanceToControlsView    parentView getTop                parentView    View  parentView getParent                          Compute the final position value for the top and bottom of the control in the scroll view          final int topInScrollView   yDistanceToControlsView   m editTextControl getTop            final int bottomInScrollView   yDistanceToControlsView   m editTextControl getBottom                Post the scroll action to happen on the scrollView with the UI thread          scrollView post new Runnable                          Override             public void run                                 int height  m editTextControl getHeight                    scrollView smoothScrollTo 0    topInScrollView   bottomInScrollView    2  - height                   m editTextControl requestFocus                                       start

User · Answer

The answer of Sherif elKhatib can be greatly improved  if you want to scroll the view to the center of the scroll view  This reusable method smooth scrolls the view to the visible center of a HorizontalScrollView  private final void focusOnView final HorizontalScrollView scroll  final View view        new Handler   post new Runnable              Override         public void run                 int vLeft   view getLeft                int vRight   view getRight                int sWidth   scroll getWidth                scroll smoothScrollTo   vLeft   vRight - sWidth    2   0                        For a vertical ScrollView use     int vTop   view getTop    int vBottom   view getBottom    int sHeight   scroll getBottom    scroll smoothScrollTo   vTop   vBottom - sHeight    2   0

User · Answer

In my case  that s not EditText  that s googleMap   And it works successfully like this       private final void focusCenterOnView final ScrollView scroll  final View view        new Handler   post new Runnable              Override         public void run                 int centreX  int   view getX     view getWidth      2               int centreY   int   view getY     view getHeight     2               scrollView smoothScrollBy centreX  centreY

User · Answer

I know this may be too late for a better answer but a desired perfect solution must be a system like positioner  I mean  when system makes a positioning for an Editor field it places the field just up to the keyboard  so as UI UX rules it is perfect   What below code makes is the Android way positioning smoothly  First of all we keep the current scroll point as a reference point  Second thing is to find the best positioning scroll point for an editor  to do this we scroll to top  and then request the editor fields to make the ScrollView component to do the best positioning  Gatcha  We ve learned the best position  Now  what we ll do is scroll smoothly from the previous point to the point we ve found newly  If you want you may omit smooth scrolling by using scrollTo instead of smoothScrollTo only   NOTE  The main container ScrollView is a member field named scrollViewSignup  because my example was a signup screen  as you may figure out a lot   view setOnFocusChangeListener new View OnFocusChangeListener              Override         public void onFocusChange final View view  boolean b                if  b                    scrollViewSignup post new Runnable                          Override                     public void run                             int scrollY   scrollViewSignup getScrollY                            scrollViewSignup scrollTo 0  0                           final Rect rect   new Rect 0  0  view getWidth    view getHeight                             view requestRectangleOnScreen rect  true                            int new scrollY   scrollViewSignup getScrollY                            scrollViewSignup scrollTo 0  scrollY                           scrollViewSignup smoothScrollTo 0  new scrollY                                                                               If you want to use this block for all EditText instances  and quickly integrate it with your screen code  You can simply make a traverser like below  To do this  I ve made the main OnFocusChangeListener a member field named focusChangeListenerToScrollEditor  and call it during onCreate as below   traverseEditTextChildren scrollViewSignup  focusChangeListenerToScrollEditor     And the method implementation is as below   private void traverseEditTextChildren ViewGroup viewGroup  View OnFocusChangeListener focusChangeListenerToScrollEditor        int childCount   viewGroup getChildCount        for  int i   0  i  lt  childCount  i              View view   viewGroup getChildAt i           if  view instanceof EditText                          EditText  view  setOnFocusChangeListener focusChangeListenerToScrollEditor                     else if  view instanceof ViewGroup                        traverseEditTextChildren  ViewGroup  view  focusChangeListenerToScrollEditor                       So  what we ve done here is making all EditText instance children to call the listener at focus   To reach this solution  I ve checked it out all the solutions here  and generated a new solution for better UI UX result   Many thanks to all other answers inspiring me much

User · Answer

private final void focusOnView            your scrollview post new Runnable                  Override             public void run                     your scrollview scrollTo 0  your EditBox getBottom

User · Answer

I made a small utility method based on Answer from WarrenFaith  this code also takes in account if that view is already visible in the scrollview  no need for scroll   public static void scrollToView final ScrollView scrollView  final View view            View needs a focus     view requestFocus            Determine if scroll needs to happen     final Rect scrollBounds   new Rect        scrollView getHitRect scrollBounds       if   view getLocalVisibleRect scrollBounds             new Handler   post new Runnable                  Override             public void run                     scrollView smoothScrollTo 0  view getBottom

User · Answer

The following is what I m using   int amountToScroll   viewToShow getBottom   - scrollView getHeight       LinearLayout LayoutParams  viewToShow getLayoutParams    bottomMargin     Check to see if scrolling is necessary to show the view if  amountToScroll  gt  0       scrollView smoothScrollTo 0  amountToScroll       This gets the scroll amount necessary to show the bottom of the view  including any margin on the bottom of that view

User · Answer

scrollView post new Runnable                          Override                     public void run                             scrollView smoothScrollTo 0  myTextView getTop                                                  Answering from my practical project

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Que Is there a way to programmatically scroll a scroll view to a specific  edittext   Ans Nested scroll view in recyclerview  last position added record data   adapter notifyDataSetChanged    nested scroll setScrollY more Detail Recycler getBottom       Is there a way to programmatically scroll a scroll view to a specific edit text

User · Answer

My solution is               int   spinnerLocation    0 0               spinner getLocationOnScreen spinnerLocation                int   scrollLocation    0  0               scrollView getLocationInWindow scrollLocation                int y   scrollView getScrollY                 scrollView smoothScrollTo 0  y   spinnerLocation 1  - scrollLocation 1

User · Answer

This works well for me       targetView getParent   requestChildFocus targetView targetView        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

reference   https   stackoverflow com a 6438240 2624806  Following worked far better   mObservableScrollView post new Runnable                 public void run                      mObservableScrollView fullScroll  View FOCUS  1

User · Answer

The above answers will work fine if the ScrollView is the direct parent of the ChildView  If your ChildView is being wrapped in another ViewGroup in the ScrollView  it will cause unexpected behavior because the View getTop   get the position relative to its parent  In such case  you need to implement this   public static void scrollToInvalidInputView ScrollView scrollView  View view        int vTop   view getTop         while    view getParent   instanceof ScrollView             view    View  view getParent            vTop    view getTop               final int scrollPosition   vTop       new Handler   post    - gt  scrollView smoothScrollTo 0  scrollPosition

User · Answer

I think I have found more elegant and less error prone solution using      ScrollView requestChildRectangleOnScreen   There is no math involved  and contrary to other proposed solutions  it will handle correctly scrolling both up and down          Will scroll the   code scrollView  to make   code viewToScroll  visible         param scrollView parent of   code scrollableContent      param scrollableContent a child of   code scrollView  whitch holds the scrollable content  fills the viewport       param viewToScroll a child of   code scrollableContent  to whitch will scroll the the   code scrollView      void scrollToView ScrollView scrollView  ViewGroup scrollableContent  View viewToScroll        Rect viewToScrollRect   new Rect      coordinates to scroll to     viewToScroll getHitRect viewToScrollRect     fills viewToScrollRect with coordinates of viewToScroll relative to its parent  LinearLayout       scrollView requestChildRectangleOnScreen scrollableContent  viewToScrollRect  false     ScrollView will make sure  the given viewToScrollRect is visible     It is a good idea to wrap it into postDelayed to make it more reliable  in case the ScrollView is being changed at the moment         Will scroll the   code scrollView  to make   code viewToScroll  visible         param scrollView parent of   code scrollableContent      param scrollableContent a child of   code scrollView  whitch holds the scrollable content  fills the viewport       param viewToScroll a child of   code scrollableContent  to whitch will scroll the the   code scrollView      private void scrollToView final ScrollView scrollView  final ViewGroup scrollableContent  final View viewToScroll        long delay   100    delay to let finish with possible modifications to ScrollView     scrollView postDelayed new Runnable             public void run                 Rect viewToScrollRect   new Rect      coordinates to scroll to             viewToScroll getHitRect viewToScrollRect     fills viewToScrollRect with coordinates of viewToScroll relative to its parent  LinearLayout               scrollView requestChildRectangleOnScreen scrollableContent  viewToScrollRect  false     ScrollView will make sure  the given viewToScrollRect is visible                  delay

User · Answer

Based on Sherif s answer  the following worked best for my use case  Notable changes are getTop   instead of getBottom   and smoothScrollTo   instead of scrollTo         private void scrollToView final View view           final ScrollView scrollView   findViewById R id bookmarksScrollView           if scrollView    null  return           scrollView post new Runnable                  Override             public void run                     scrollView smoothScrollTo 0  view getTop

User · Answer

Vertical scroll  good for forms  Answer is based on Ahmadalibaloch horizontal scroll   private final void focusOnView final HorizontalScrollView scroll  final View view        new Handler   post new Runnable              Override         public void run                 int top   view getTop                int bottom   view getBottom                int sHeight   scroll getHeight                scroll smoothScrollTo 0    top   bottom - sHeight    2

User · Answer

You can use ObjectAnimator like this   ObjectAnimator ofInt yourScrollView   scrollY   yourView getTop    setDuration 1500  start

[android] Is there a way to programmatically scroll a scroll view to a specific edit text?

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