How to make calculator android app and install using release mode (launch app)

Required tools Android studio click here to download JDK 7 or later version Download system specification 1) 3GB ram minimum 2) i3,i5 processor Steps 1.First we type a xml code of android application copy and paste this xml file in xml file <? xml version ="1.0" encoding ="utf-8" ?> <TableLayout xmlns:android ="http://schemas.android.com/apk/res/android" xmlns:tools ="http://schemas.android.com/tools" android:id ="@+id/relative1" android:layout_width ="match_parent" android:layout_height ="match_parent" tools:context =".MainActivity" > <TableRow> <EditText android:layout_span ="5" android:id ="@+id/edt1" android:layout_width ="match_parent" android:layout_height ="wrap_content" /> </TableRow> <TableRow> <Button android:id =...