java - Android start new activity when clicking widget -

i new coding java , xml android applications , wanted know how start/open new activity when clicking on something. in case using relative layout keep image , text 1 object. want when click on it start/open new activity. how do this? tell me step step since quite new this.

first of all, if want layout act (relativelayout) button (do not handle onclick on layout child components) firstly set in xml layout file relativelayout attribute

android:clickable="true" 

or can directly in code (in oncreate method)

relativelayout.setclickable(true); 

than need set onclicklistener layout.
can creating anonymous class

relativelayout.setonclicklistener(new onclicklistener()           {              @override             public void onclick(view v)              {               intent startactivityintent = new intent(getapplicationcontext(),yourdesiredactivity.class);               startactivity(startactivityintent);              }           } 

update

layout defined in xml file, of course in android can in code ,but better use xml file.

in idea have folder res->layout here should place layout files. example layout name `

relative_root_layout.xml

    <xml version="1.0" encoding="utf-8"?>     <relativelayout         xmlns:android="http://schemas.android.com/apk/res/android"        android:id="@+id/relative_layout" android:layout_height="wrap_content" android:layout_width="wrap_content">         <imageview           android:id="@+id/image_view">           android:layout_width="wrap_content"           android:src="@drawable/icon"           android:layout_height="wrap_content"           android:layout_alignparenttop="true"         imageview>         <textview           android:id="@+id/text_view"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           android:textsize="20sp"           android:layout_torightof="@+id/image_view"           android:text="relative layout">        textview>     relativelayout> 

but in case have text , image better use

<button  android:id="@+id/button"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:drawableleft="@android:drawable/btn_image"  android:text="button image"  android:gravity="left"  android:drawablepadding="10dp"> button> 

how can access widgets ?
basic thing have know if developing android, essential part. please read documentation, read books, watch tutorial or whatever.

in short need inflate layout in activity oncreate() method relativelayout mrelativelayout;

@override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.relative_root_layout);         mrelativelayout = (relativelayout) findviewbyid(r.id.relative_layout);         mrelativelayout.setonclicklistener(.....)  } 

but again basic things must know.