Start another activity in one activity

I. Create a new Empty project

Two. Add an activity and name it Baty

Three. Add a button to Activity_main.xml and set the ID number to BTNSTARTB

< Button         Android:layout_width = "Wrap_content"         android:layout_height= "Wrap_content"        android:text= "Start b "        Android:id = "@+id/btnstartb" />

Four. Add the following code in the OnCreate function of mainactivity:

Findviewbyid (R.ID.BTNSTARTB). Setonclicklistener (new  View.onclicklistener () {            @Override             publicvoid  OnClick (View v) {                startactivity (new Intent (mainactivity).  this, Baty. class ));            }        });

PS: You can set the activity style in androidmanifest.xml, for example setting Baty as a dialog style:

< Activity             Android:name =". Baty "            android:label=" @string/title_activity_baty "            android:theme=" @style/base.theme.appcompat.dialog ">        </activity> 

Start another activity in one activity