Android ScrollView force to bottom

Question

I would like a ScrollView to start all the way at the bottom  Any methods

User · Answer

What worked best for me is   scroll view post new Runnable           Override      public void run                 This method works but animates the scrolling              which looks weird on first load             scroll view fullScroll View FOCUS DOWN                This method works even better because there are no animations           scroll view scrollTo 0  scroll view getBottom

User · Answer

Using there is another cool way to do this with Kotlin coroutines  The advantage of using a coroutine opposed to a Handler with a runnable  post postDelayed  is that it does not fire up an expensive thread to execute a delayed action   launch UI       delay 300      scrollView fullScroll View FOCUS DOWN      It is important to specify the coroutine s HandlerContext as UI otherwise the delayed action might not be called from the UI thread

User · Answer

One thing to consider is what NOT to set   Make certain your child controls  especially EditText controls  do not have the RequestFocus property set   This may be one of the last interpreted properties on the layout and it will override gravity settings on its parents  the layout or ScrollView

User · Answer

I increment to work perfectly       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              Note  This answer is a workaround for really old versions of android  Today the postDelayed has no more that bug and you should use it

User · Answer

Here is some other ways to scroll to bottom  fun ScrollView scrollToBottom            use this for scroll immediately     scrollTo 0  this getChildAt 0  height           or this for smooth scroll       smoothScrollBy 0  this getChildAt 0  height          or this for   very   smooth scroll       ObjectAnimator ofInt this   scrollY   this getChildAt 0  height  setDuration 2000  start       Using  If you scrollview already laid out  my scroll view scrollToBottom     If your scrollview is not finish laid out  eg  you scroll to bottom in Activity onCreate method        my scroll view post       my scroll view scrollToBottom

User · Answer

Sometimes scrollView post doesn t work   scrollView post new Runnable              Override         public void run                 scrollView fullScroll ScrollView FOCUS DOWN                       BUT if you use scrollView postDelayed  it will definitely work   scrollView postDelayed new Runnable              Override         public void run                 scrollView fullScroll ScrollView FOCUS DOWN                   1000

User · Answer

Not exactly the answer to the question  but I needed to scroll down as soon as an EditText got the focus  However the accepted answer would make the ET also lose focus right away  to the ScrollView I assume     My workaround was the following   emailEt setOnFocusChangeListener new View OnFocusChangeListener          Override     public void onFocusChange View v  boolean hasFocus            if hasFocus               Toast makeText getActivity     got the focus   Toast LENGTH LONG  show                scrollView postDelayed new Runnable                      Override                 public void run                         scrollView fullScroll ScrollView FOCUS DOWN                                    200            else               Toast makeText getActivity     lost the focus   Toast LENGTH LONG  show

User · Answer

This works instantly  Without delay     wait for the scroll view to be laid out scrollView post new Runnable       public void run            then wait for the child of the scroll view  normally a LinearLayout  to be laid out     scrollView getChildAt 0  post new Runnable           public void run                finally scroll without animation         scrollView scrollTo 0  scrollView getBottom

User · Answer

When the view is not loaded yet  you cannot scroll  You can do it  later  with a post or sleep call as above  but this is not very elegant    It is better to plan the scroll and do it on the next onLayout    Example code here   https   stackoverflow com a 10209457 1310343

User · Answer

scroll fullScroll View FOCUS DOWN  also should work   Put this in a scroll Post Runnable run   Kotlin Code   scrollView post      scrollView fullScroll View FOCUS DOWN

User · Answer

One possible reason of why scroll fullScroll View FOCUS DOWN  might not work even wrapped in  post   is that the view is not laid out  In this case View doOnLayout   could be a better option  scroll doOnLayout        scroll fullScroll View FOCUS DOWN     Or  something more elaborated for the brave souls  https   chris banes dev 2019 12 03 suspending-views

User · Answer

I actually found that calling fullScroll twice does the trick   myScrollView fullScroll View FOCUS DOWN    myScrollView post new Runnable          Override     public void run             myScrollView fullScroll View FOCUS DOWN               It may have something to do with the activation of the post   method right after performing the first  unsuccessful  scroll  I think this behavior occurs after any previous method call on myScrollView  so you can try replacing the first fullScroll   method by anything else that may be relevant to you

User · Answer

scroll fullScroll View FOCUS DOWN  will lead to the change of focus  That will bring some strange behavior when there are more than one focusable views  e g two EditText  There is another way for this question       View lastChild   scrollLayout getChildAt scrollLayout getChildCount   - 1       int bottom   lastChild getBottom     scrollLayout getPaddingBottom        int sy   scrollLayout getScrollY        int sh   scrollLayout getHeight        int delta   bottom -  sy   sh        scrollLayout smoothScrollBy 0  delta     This works well   Kotlin Extension  fun ScrollView scrollToBottom         val lastChild   getChildAt childCount - 1      val bottom   lastChild bottom   paddingBottom     val delta   bottom -  scrollY  height              smoothScrollBy 0  delta

User · Answer

you should run the code inside the scroll post like this   scroll post new Runnable                      Override     public void run                scroll fullScroll View FOCUS DOWN

User · Answer

In those case were using just scroll scrollTo 0  sc getBottom    don t work  use it using scroll post  Example   scroll post new Runnable        Override   public void run       scroll fullScroll View FOCUS DOWN

User · Answer

i tried that successful   scrollView postDelayed new Runnable          Override     public void run             scrollView smoothScrollTo 0  scrollView getHeight              1000

User · Answer

If your minimum SDK is 23 or upper you could use this  View childView   findViewById R id your view id in the scroll view  if childView    null     scrollview post    - gt  scrollview scrollToDescendant childView

[android] Android: ScrollView force to bottom

Examples related to android

Examples related to android-scrollview