android - How to show the toolbar layout only when a song is played (ListView item is clicked) -


activity_main2.xml

i want show toolbar in following code when listview item clicked. otherwise, remain hidden. if use (view.invisible) in java code layout disappears, yet white space remains in area. want listview occupy area.

<?xml version="1.0" encoding="utf-8" ?> <linearlayout 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:orientation="vertical"     tools:context="com.example.ashutosh.music_player.main2activity">       <imageview         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:id="@+id/catv" />      <listview         android:id="@+id/track_list_view"         android:layout_width="match_parent"         android:layout_weight="100"         android:layout_height="0dp"         android:overscrollheader="@drawable/catv1"/>       <android.support.v7.widget.toolbar     android:id="@+id/bar_player"     android:background="#333333"     android:theme="@style/theme.appcompat.dark.darkactionbar"     android:layout_width="match_parent"     android:layout_height="50dp"     app:contentinsetstart="0dp">      <imageview         android:id="@+id/selected_track_image"         android:layout_width="50dp"         android:layout_height="55dp" />      <textview         android:id="@+id/selected_track_title"         android:paddingleft="8dp"         android:layout_width="220dp"         android:layout_height="wrap_content" />      <imageview         android:id="@+id/forward"         android:layout_width="48dp"         android:layout_height="48dp"         android:layout_marginleft="30dp"/>      <imageview         android:id="@+id/player_control"         android:layout_gravity="right"         android:layout_width="@dimen/image_size"         android:layout_height="@dimen/image_size" />  </android.support.v7.widget.toolbar>   </linearlayout>

try this,this @shijil said

<?xml version="1.0" encoding="utf-8" ?> <linearlayout 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:orientation="vertical"     tools:context="com.example.ashutosh.music_player.main2activity">       <imageview         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:id="@+id/catv" />      <listview         android:id="@+id/track_list_view"         android:layout_width="match_parent"         android:layout_weight="100"         android:layout_height="0dp"         android:overscrollheader="@drawable/catv1"/>       <android.support.v7.widget.toolbar     android:id="@+id/bar_player"     android:background="#333333"     android:theme="@style/theme.appcompat.dark.darkactionbar"     android:layout_width="match_parent"         android:visibility="gone"     android:layout_height="50dp"     app:contentinsetstart="0dp">      <imageview         android:id="@+id/selected_track_image"         android:layout_width="50dp"         android:layout_height="55dp" />      <textview         android:id="@+id/selected_track_title"         android:paddingleft="8dp"         android:layout_width="220dp"         android:layout_height="wrap_content" />      <imageview         android:id="@+id/forward"         android:layout_width="48dp"         android:layout_height="48dp"         android:layout_marginleft="30dp"/>      <imageview         android:id="@+id/player_control"         android:layout_gravity="right"         android:layout_width="@dimen/image_size"         android:layout_height="@dimen/image_size" />  </android.support.v7.widget.toolbar>   </linearlayout>

and set programatically 

.setvisibility(view.gone); .setvisibility(view.visible);

as needed


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