java - Android ProgressBar in FrameLayout is never visible -

hello i'm trying show circular progress bar when user clicks on log in button, similar screenshot below.

problem progress bar never shown, tough changed it's visibility view.visible in loginactivity.showprogressbar() with

progressbar.setvisibility(view.visible);.

activity_log_in.xml

<?xml version="1.0" encoding="utf-8"?> <framelayout style="@style/layout"              xmlns:android="http://schemas.android.com/apk/res/android"              xmlns:tools="http://schemas.android.com/tools"              tools:context=".activity.loginactivity">    <!-- tw login form -->   <include     android:id="@+id/log_in_form"     layout="@layout/log_in"/>    <!-- loading indicator -->   <progressbar     android:id="@+id/progress_bar"     style="@style/widget.appcompat.progressbar"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_gravity="center"     android:indeterminate="true"/>  </framelayout> 

styles.xml

<resources>    <!-- ... -->    <style name="layout">     <item name="android:layout_width">match_parent</item>     <item name="android:layout_height">match_parent</item>     <item name="android:background">@android:color/white</item>   </style>    <!-- ... -->  </resources> 

loginactivity.java

package com.trainerworkout.trainerworkout.activity;  // import ...  /**  * personal trainer need log in can have access app.  */ public class loginactivity extends appcompatactivity {   // variable declarations ...    // butterknife allows eliminate findviewbyid calls using @bind on fields.   ...   @bind(r.id.progress_bar)   progressbar progressbar;   @bind(r.id.log_in_form)   relativelayout loginform;    @override   protected void oncreate(bundle savedinstancestate) {     log.d(tag, "oncreate()");     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_log_in);     context = this;     network = new network(this);     butterknife.bind(this);      applyfont();      // sets 2 colors textview html formatting     //noinspection deprecation     not_a_member_text_view.settext(html.fromhtml(getstring(r.string.not_a_member_string)));      if (network.userisloggedin()) {       loginrefresh();     } else {       showform();     } // else   } // oncreate()    public void loginrefresh() {     showprogressbar();     network.loginrefresh(this);     showform();   } // loginrefresh()    // ...    public void loginbuttonclick(view view) {     log.d(tag, "loginbuttonclick()");     // prevent multiple clicks during network call     loginbutton.setenabled(false);     if (network.userisloggedin()) {       loginrefresh();     } else {       login();     } // else     loginbutton.setenabled(true);   } // loginbuttonclick()    /**    * prepares log in request api    */   private void login() {     string email = emailedittext.gettext().tostring();     string password = passwordedittext.gettext().tostring();      if (valid.validfields(this, email, password, emailedittext, passwordedittext)) {       showprogressbar();       network.login(this, email, password);       showform();     } else {       shakeloginbutton();     } // else   } // login()    // ...    public void showform() {     progressbar.setvisibility(view.gone);     loginform.setvisibility(view.visible);   } // showprogressbar()    public void showprogressbar() {     progressbar.setvisibility(view.visible);     loginform.setvisibility(view.gone);   } // showprogressbar() } // loginactivity 

edit - log_in.xml

<?xml version="1.0" encoding="utf-8"?> <!-- tw log in form --> <relativelayout   style="@style/layout"   xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:tools="http://schemas.android.com/tools"   tools:context=".activity.loginactivity">    <linearlayout     style="@style/layout"     android:layout_margin="@dimen/layout_margin_profile"     android:gravity="center"     android:orientation="vertical">      <!-- ... -->      <!-- email field -->     <edittext       android:id="@+id/email_edit_text"       style="@style/edit_text"       android:layout_height="wrap_content"       android:hint="@string/email"       android:inputtype="textemailaddress"/>     <-- ... -->   </relativelayout> 

here,issue

  <include     android:id="@+id/log_in_form"     layout="@layout/log_in"/> 

once check it's property.

if possible send code snippet.