android - I want to make items expandable to edit details about place -

someone me how make list item expandable add details particular places.

historical.java

public class historical extends appcompatactivity {     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_historical);          arraylist<places> places = new arraylist<places>();          places.add(new places("lotus temple","kalkaji",r.drawable.lotus));         places.add(new places("india gate","rajpath",r.drawable.india));         places.add(new places("humayu tomb"," mathura road",r.drawable.humayu));         places.add(new places("tughlaqabad  fort","tughlaqabad ",r.drawable.tughlakabad));         places.add(new places("qutub minar","mehrauli",r.drawable.qutub));         places.add(new places("safdarjung tomb","delhi race club",r.drawable.safdarjung));          placeadapter p = new placeadapter(this,places);          listview l = (listview) findviewbyid(r.id.list);         l.setadapter(p);     } } 

places.java

package com.example.android.tourguide;  public class places {     private string name;     private int image;     private string location;     //private int image2;      places(string n,string l,int i1/**,int i2*/){         name =n;         location = l;         image = i1;         //image2 = i2;     }      public string getn()     {         return name;     }      public string getlocation()     {         return location;     }      public int getimage()     {         return image;     } } 

placeadapter

public class placeadapter extends arrayadapter<places> {     public placeadapter(activity context, arraylist<places> places) {         super(context, 0, places);     }      @nonnull     @override     public view getview(int position, @nullable view convertview, @nonnull viewgroup parent) {         // check if existing view being reused, otherwise inflate view         view listitemview = convertview;         if (listitemview == null) {             listitemview = layoutinflater.from(getcontext()).inflate(r.layout.list_items, parent, false);         }          // {@link androidflavor} object located @ position in list         places currentword = getitem(position);          // find textview in list_item.xml layout id version_name         textview miwoktextview = (textview) listitemview.findviewbyid(r.id.name);         // version name current androidflavor object ,         // set text on name textview         miwoktextview.settext(currentword.getn());          // find textview in list_item.xml layout id version_number         textview defaulttextview = (textview) listitemview.findviewbyid(r.id.location);         // version number current androidflavor object ,         // set text on number textview         defaulttextview.settext(currentword.getlocation());          // find imageview in list_item.xml layout id list_item_icon          imageview iconview = (imageview) listitemview.findviewbyid(r.id.image);         // image resource id current word object ,         // set image iconview          iconview.setimageresource(currentword.getimage());          return listitemview;     } } 

list_item.xml

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="match_parent"     android:layout_height="match_parent">      <imageview         android:id="@+id/image"         android:layout_margin="16dp"         android:layout_width="wrap_content"         android:layout_height="wrap_content" />      <linearlayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:orientation="vertical"         android:padding="16dp"         android:layout_torightof="@+id/image">          <textview             android:id="@+id/name"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             />          <textview             android:id="@+id/location"             android:layout_width="wrap_content"             android:layout_height="wrap_content" />      </linearlayout>      <imageview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparentright="true"         android:layout_centervertical="true"         android:src="@drawable/ic_keyboard_arrow_right_black_24dp" />  </relativelayout> 

activity_history.xml

<?xml version="1.0" encoding="utf-8"?> <listview 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:id="@+id/list"     tools:context="com.example.android.tourguide.historical"> </listview>