java - Android animation fade in / fade out is not setting the visibility of the view in the callback function -

i have android view want fadein , fadeout when users click on button. animation being called , callback being called when animation triggers view cannot seen. think problem xml layout, have been stuck on hours if can appreciated.

my main layout: - view in question

<linearlayout         android:orientation="vertical"         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:layout_gravity="left|top"         android:background="@color/whiteoverlay"         android:gravity="center_vertical|center_horizontal"         android:id="@+id/uploadoptions"         android:alpha="0"         android:visibility="gone">          <linearlayout             android:orientation="vertical"             android:layout_width="fill_parent"             android:layout_height="wrap_content"             android:layout_gravity="center"             android:paddingleft="40dp"             android:paddingright="40dp">              <button                 style = "@style/basic_button"                 android:text="@string/selectfromgallery"                 android:id="@+id/gallery_select"                 android:layout_margintop="10dp"                 android:layout_width="fill_parent"                 android:layout_height="fill_parent" />              <button                 style = "@style/basic_button"                 android:text="@string/selectfromcamera"                 android:id="@+id/camera_select"                 android:layout_margintop="10dp"                 android:layout_width="fill_parent"                 android:layout_height="fill_parent" />         </linearlayout>     </linearlayout> 

fadein

<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android">     <alpha         android:fromalpha="0.0"         android:toalpha="1.0"         android:interpolator="@android:anim/accelerate_interpolator"         android:duration="500" /> </set> 

fadeout

<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android">     <alpha         android:fromalpha="1.0"         android:toalpha="0.0"         android:interpolator="@android:anim/accelerate_interpolator"         android:duration="500" /> </set> 

activity java -

public class regpp extends activity {     private string lang = "";     private boolean optionsactive = false;     private linearlayout options = null;       private void fade (final view view, final boolean toggle){         animation anim;         view.setvisibility(view.visible);         if(toggle){             //fadeout             anim = animationutils.loadanimation(regpp.this, r.anim.fadeout);             log.d("fade","fadeout");         } else {             //fadein             anim = animationutils.loadanimation(regpp.this, r.anim.fadein);             log.d("fade","fadein");         }         view.startanimation(anim);         anim.setanimationlistener(new animation.animationlistener(){             @override             public void onanimationstart(animation animation) {              }             @override             public void onanimationend(animation arg0) {                 //functionality here                 if(toggle){                     view.setvisibility(view.gone);                     log.d("fade", "fadeout callback");                 } else {                     view.setvisibility(view.visible);                     log.d("fade", "fadein callback");                 }             }             @override             public void onanimationrepeat(animation animation) {              }         });     }      @override     protected void oncreate (bundle savedinstancestate) {         super.oncreate(savedinstancestate);         this.lang = getresources().getstring(r.string.lang);         strictmode.threadpolicy policy = new strictmode.threadpolicy.builder().permitall().build();         strictmode.setthreadpolicy(policy);         final context context = regpp.this;          setcontentview(r.layout.reg_pp);          imagebutton uploadtog = (imagebutton) findviewbyid(r.id.uploadtog);         options = (linearlayout) findviewbyid(r.id.uploadoptions);          uploadtog.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 fade(options,false);                 optionsactive = true;             }         });      }     @override     public void onbackpressed() {         if(optionsactive){             fade(options,true);             optionsactive = false;         } else {             super.onbackpressed();         }     } } 

remove line may u

android:visibility="gone"

visibility gone that's why view not visible

    android:visibility="gone"