Programmatically scroll to a specific position in an Android ListView

Question

How can I programmatically scroll to a specific position in a ListView   For example  I have a String    A B C D       and I need to set the top visible item of the ListView to the index 21 of my String

User · Answer

Handling listView scrolling using UP  Down using button   If someone is interested in handling listView one row up down using button  then   public View OnClickListener onChk   new View OnClickListener                  public void onClick View v                      int index   list getFirstVisiblePosition                     getListView   smoothScrollToPosition index 1      For increment

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If someone looking for a similar functionality like Gmail app   The Listview scroll will be positioned to top by default  Thanks for the hint   amalBit  Just subtract it  That s it    Handler handler   new Handler        handler postDelayed new Runnable              Override         public void run                 int h1   mDrawerList getHeight                int h2   header getHeight                mDrawerList smoothScrollToPosition h2-h1                    1000

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I have set OnGroupExpandListener and override onGroupExpand   as   and use setSelectionFromTop   method which Sets the selected item and positions the selection y pixels from the top edge of the ListView   If in touch mode  the item will not be selected but it will still be positioned appropriately    android docs       yourlist setOnGroupExpandListener  new ExpandableListView OnGroupExpandListener                   Override         public void onGroupExpand int groupPosition                 expList setSelectionFromTop groupPosition  0                 your other code

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I found this solution to allow the scroll up and down using two different buttons   As suggested by  Nepster I implement the scroll programmatically using the  getFirstVisiblePosition   and getLastVisiblePosition   to get the current position   final ListView lwresult    ListView  findViewById R id rds rdi mat list                      if  list size    gt  0                ImageButton bnt    ImageButton  findViewById R id down action               bnt setVisibility View VISIBLE               bnt setOnClickListener new OnClickListener                       Override                 public void onClick View v                        if lwresult getLastVisiblePosition   lt lwresult getAdapter   getCount                             lwresult smoothScrollToPosition lwresult getLastVisiblePosition   5                        else                          lwresult smoothScrollToPosition lwresult getAdapter   getCount                                                                          bnt    ImageButton  findViewById R id up action               bnt setVisibility View VISIBLE                bnt setOnClickListener new OnClickListener                       Override                 public void onClick View v                        if lwresult getFirstVisiblePosition   gt 0                           lwresult smoothScrollToPosition lwresult getFirstVisiblePosition  -5                        else                          lwresult smoothScrollToPosition 0

User · Answer

The Listview scroll will be positioned to top by default  but want to scroll if not visible then use this   if  listView1 getFirstVisiblePosition    gt  position    listView1 getLastVisiblePosition    lt  position              listView1 setSelection position

User · Answer

If you want to jump directly to the desired position in a listView just use  listView setSelection int position    and if you want to jump smoothly to the desired position in listView just use  listView smoothScrollToPosition int position

User · Answer

Put your code in handler as follows   public void timerDelayRunForScroll long time            Handler handler   new Handler             handler postDelayed new Runnable                            public void run                        try                       lstView smoothScrollToPosition YOUR POSITION                     catch  Exception e                              time            and then call this method like   timerDelayRunForScroll 100     CHEERS

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For a SmoothScroll with Scroll duration  getListView   smoothScrollToPositionFromTop position offset duration    Parameters position - gt  Position to scroll to offset   ---- gt Desired distance in pixels of position from the top of the view when scrolling is finished duration- gt  Number of milliseconds to use for the scroll  Note  From API 11  HandlerExploit s answer was what I was looking for  but My listview is quite lengthy and also with alphabet scroller  Then I found that the same function can take other parameters as well     Edit  From AFDs suggestion  To position the current selection  int h1   mListView getHeight    int h2   listViewRow getHeight     mListView smoothScrollToPositionFromTop position  h1 2 - h2 2  duration

User · Answer

For a direct scroll   getListView   setSelection 21     For a smooth scroll   getListView   smoothScrollToPosition 21

User · Answer

it is easy list-view set selection you pos   or you can save your position with SharedPreference and when you start activity it get preferences and setSeletion to that int

User · Answer

This is what worked for me  Combination of answers by amalBit  amp  Melbourne Lopes  public void timerDelayRunForScroll long time        Handler handler   new Handler         handler postDelayed new Runnable                        public void run                    try                     int h1   mListView getHeight                      int h2   v getHeight                       mListView smoothScrollToPositionFromTop YOUR POSITION  h1 2 - h2 2  500                    catch  Exception e                      time        and then call this method like   timerDelayRunForScroll 400

User · Answer

You need two things to precisely define the scroll position of a listView   To get the current listView Scroll position   int firstVisiblePosition   listView getFirstVisiblePosition     int topEdge listView getChildAt 0  getTop      This gives how much the top view has been scrolled    To set the listView Scroll position   listView setSelectionFromTop firstVisiblePosition 0      Note the  -  sign for scrollTo    listView scrollTo 0 -topEdge

User · Answer

-If you just want the list to scroll up dawn to a specific position   myListView smoothScrollToPosition i     -if you want to get the position of a specific item in myListView   myListView getItemAtPosition i     -also this myListView getVerticalScrollbarPosition i  can helps you   Good Luck

[android] Programmatically scroll to a specific position in an Android ListView

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Examples related to android-listview