android - Scrolling does not work on ScrollView -

i have scrollview follows:

<scrollview xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="wrap_content" >  <relativelayout     android:layout_height="wrap_content"     android:layout_width="fill_parent"     android:orientation="horizontal">      <textview         android:id="@+id/filtersdialogpreference_textview"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparentleft="true"         android:layout_centervertical="true" />      <checkbox         android:id="@+id/filtersdialogpreference_checkbox"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparentright="true"         android:layout_centervertical="true" /> </relativelayout> 

corresponding class uses xml above

public class filtersdialogpreference extends dialogpreference implements onclicklistener{   public filtersdialogpreference(context context, attributeset attrs) {     super(context, attrs);     setpersistent(false);     mcontext = context; }  @override public void onbinddialogview(view view) {     super.onbinddialogview(view); }  @override protected view oncreatedialogview() {     linearlayout layout = null;     filters = new arraylist<filter>();     checkboxes = new arraylist<checkbox>();     layoutinflater minflater = (layoutinflater) getcontext().getsystemservice(context.layout_inflater_service);     layout = (linearlayout) minflater.inflate(r.layout.filter_dialog_preference, null, false);     filtersdatasource ds = new filtersdatasource(mcontext);     ds.open();     // read current filter preferences     arraylist<string> ids = ds.getfilterids();     view filterview;     (int = 0; < ids.size(); i++) {         string name = ds.getfilter(ids.get(i)).getfiltername();         boolean ismonitored = ds.ismonitored(ids.get(i));         filters.add(new filter(ids.get(i), name, ismonitored));          filterview = minflater.inflate(r.layout.filter_selection_item, null);         textview nametv = (textview) filterview.findviewbyid(r.id.filtersdialogpreference_textview);         nametv.settext(name);         checkbox checkbox = (checkbox) filterview.findviewbyid(r.id.filtersdialogpreference_checkbox);          checkbox.setonclicklistener(this);         checkbox.setchecked(ismonitored);          checkboxes.add(checkbox);         layout.addview(filterview);     }     ds.close();      return layout;  }  @override public void ondialogclosed(boolean positiveresult) {     if (positiveresult) {         log.v(gsguiconst.log_dev, "saving filter settings");         filtersdatasource ds = new filtersdatasource(mcontext);         ds.open();         (int = 0; < filters.size(); i++) {             string _id = filters.get(i).mid;             boolean enabled = filters.get(i).isenabled();             ds.setmonitoredvalue(_id, enabled);             //log.v(gsguiconst.log_dev, "reread"+ds.getfilter(_id).getfiltername()+": "+ds.ismonitored(_id));         }         ds.close();     }  }  private class filter {     private string mname;     private boolean menabled;     private string mid;      public filter(string _id, string name, boolean enabled) {         mid = _id;         mname = name;         menabled = enabled;     }      public string getid() {         return mid;     }      public boolean isenabled() {         return menabled;     }      public void setenabled(boolean monitored) {         menabled = monitored;     }      public string tostring() {         return mname;     } }   @override public void onclick(view v) {     checkbox checkbox = (checkbox)v;     int id = checkboxes.indexof(checkbox);     filters.get(id).setenabled(checkbox.ischecked()); } 

}

there lots of entries on settings activity, unfortunatelly layout not react on scrolling. idea? not sure if scrollview necessary @ all. linearlayout should handle scrolling well, shouldn't it?

set in xml

android:maxlines = "100" android:scrollbars = "vertical" 

then use in activity oncreate:

textview yourtextview = (textview) findviewbyid (r.id.textview1) yourtextview.setmovementmethod(new scrollingmovementmethod())