spinner - Android Custom Multispinner: Implement FadingEdge scroll -


i android newbie , have used code here: https://stackoverflow.com/a/17577310/6412402 create custom multispinner (it works great!) graphic designer friend hates me/the current layout , wants ios-like scroll options user has passed fade view (similar how scrollview has fadingedge length) how give custom spinner fading edge length similar this: fading scroll

except fading scroll image text , want items in custom spinner have property. doesn't have picture need kind of fading property. please help! here code in java class multispinner:

package packagename; import android.app.alertdialog; import android.content.context; import android.content.dialoginterface; import android.content.dialoginterface.onmultichoiceclicklistener; import android.content.res.typedarray; import android.util.attributeset; import android.widget.arrayadapter; import android.widget.spinner;  import java.util.list;  public class multispinner extends spinner {  private charsequence[] entries; private boolean[] selected; private multispinnerlistener listener;  public multispinner(context context, attributeset attrs) {     super(context, attrs);     typedarray = context.obtainstyledattributes(attrs, r.styleable.multispinner);     entries = a.gettextarray(r.styleable.multispinner_android_entries);     if (entries != null) {         selected = new boolean[entries.length]; // false-filled default     }     a.recycle(); } private onmultichoiceclicklistener monmultichoiceclicklistener = new onmultichoiceclicklistener() {     @override     public void onclick(dialoginterface dialog, int which, boolean ischecked) {         selected[which] = ischecked;     } }; private dialoginterface.onclicklistener monclicklistener = new dialoginterface.onclicklistener() {     @override     public void onclick(dialoginterface dialog, int which) {         // build new spinner text & delimiter management         stringbuffer spinnerbuffer = new stringbuffer();         (int = 0; < entries.length; i++) {             if (selected[i]) {                 spinnerbuffer.append(entries[i]);                 spinnerbuffer.append(", ");             }         }          // remove trailing comma         if (spinnerbuffer.length() > 2) {             spinnerbuffer.setlength(spinnerbuffer.length() - 2);         }          // display new text         arrayadapter<string> adapter = new arrayadapter<string>(getcontext(),                 android.r.layout.simple_spinner_item,                 new string[] { spinnerbuffer.tostring() });         setadapter(adapter);          if (listener != null) {             listener.onitemsselected(selected);         }          // hide dialog         dialog.dismiss();     } };  @override public boolean performclick() {     new alertdialog.builder(getcontext())             .setmultichoiceitems(entries, selected, monmultichoiceclicklistener)             .setpositivebutton(android.r.string.ok, monclicklistener)             .show();     return true; }  public void setmultispinnerlistener(multispinnerlistener listener) {     this.listener = listener; }  public interface multispinnerlistener {     public void onitemsselected(boolean[] selected); } }

and xml code

<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.nestedscrollview xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fadingedgelength="400dp" android:requiresfadingedge="vertical" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="edu.ucsb.cs.cs185.project.cookey.scrollingactivity" tools:showin="@layout/activity_scrolling">  <packagename.multispinner     android:id="@+id/multispinner"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:entries="@array/multispinner_entries"     android:fadingedgelength="300dp"     android:requiresfadingedge="vertical"/> </android.support.v4.widget.nestedscrollview>


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