android - Scrolling a HorizontalScrollView by clicking buttons on its sides -

i using horizontalscrollview within fragment. when scroll view instead of scrolling items within horizontalscrollview whole fragment scrolled either left or right. have thought of using buttons on both sides of layout. cannot how scroll scroll view on either side.

any in regard highly appreciated.

edit

following xml file.

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="wrap_content" android:layout_height="wrap_content" >  <imagebutton     android:id="@+id/btn_left"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentleft="true"     android:src="@drawable/left_arrow" />  <imagebutton     android:id="@+id/btn_right"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentright="true"     android:src="@drawable/right_arrow" />  <horizontalscrollview     android:id="@+id/horizontal_scrollview"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:layout_toleftof="@id/btn_right"     android:layout_torightof="@id/btn_left"     android:fadescrollbars="false"     android:padding="5dp"     android:scrollbaralwaysdrawhorizontaltrack="true"     android:scrollbars="horizontal" >      <linearlayout         android:id="@+id/dynamic_generation"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:orientation="horizontal" >     </linearlayout> </horizontalscrollview> 

and java file

public class mygallery extends activity {  private linearlayout linearlayout;  private imagebutton leftbtn; private imagebutton rightbtn; private horizontalscrollview hsv; int currentscrollx = 0;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.horizontalscrolling);      leftbtn = (imagebutton) findviewbyid(r.id.btn_left);     rightbtn = (imagebutton) findviewbyid(r.id.btn_right);     hsv = (horizontalscrollview) findviewbyid(r.id.horizontal_scrollview);     linearlayout = (linearlayout) findviewbyid(r.id.dynamic_generation);      leftbtn.setonclicklistener(new onclicklistener() {          @override         public void onclick(view v) {             // todo auto-generated method stub         }     });      rightbtn.setonclicklistener(new onclicklistener() {          @override         public void onclick(view v) {         }     });      string[] users = new string[20];     (int = 0; < 20; i++) {         users[i] = "user " + (i + 1);     }      (int = 0; < users.length; i++) {         final textview userid = new textview(mygallery.this);         userid.settext(users[i]);         imageview imageview = new imageview(mygallery.this);         linearlayout.addview(userid);         linearlayout.addview(imageview);         userid.setonclicklistener(new onclicklistener() {              @override             public void onclick(view v) {                 // todo auto-generated method stub                 toast.maketext(mygallery.this,                         userid.gettext() + " has been clicked!",                         toast.length_long).show();                 // hsv.             }         });     } }  } 

what need

when press of left or right button scroll view must scroll left or right respectively.

if add following line of code existing handler, view scroll right every button click:

rightbtn.setonclicklistener(new view.onclicklistener() {      @override     public void onclick(view v) {         hsv.scrollto((int)hsv.getscrollx() + 10, (int)hsv.getscrolly());     } }); 

if you'd scroll more smoothly can use ontouchlistener instead:

rightbtn.setontouchlistener(new view.ontouchlistener() {      private handler mhandler;     private long minitialdelay = 300;     private long mrepeatdelay = 100;      @override     public boolean ontouch(view v, motionevent event) {         switch (event.getaction()) {             case motionevent.action_down:                 if (mhandler != null)                     return true;                 mhandler = new handler();                 mhandler.postdelayed(maction, minitialdelay);                 break;             case motionevent.action_up:                 if (mhandler == null)                     return true;                 mhandler.removecallbacks(maction);                 mhandler = null;                 break;         }         return false;     }      runnable maction = new runnable() {         @override         public void run() {             hsv.scrollto((int) hsv.getscrollx() + 10, (int) hsv.getscrolly());             mhandler.postdelayed(maction, mrepeatdelay);         }     }; }); 

vary delays liking smoothness , responsiveness want.