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Clouds App – Wipro CODE STORM App Hack
2015
Clouds App - Documentation
Introduction : In have developed an Android App , named as Clouds
App.It is a realtime weather forecast android application. This app supports
weather forecast for 200,000 cities all over the world .I have made it to
show forecast for 14 days .
Clouds App Specification :Supports min SDK Version :10 ;Supports max
SDK version:20. Needs permission for full network access.
For Wipro’s CODE STORM App Hack , I have selected to build a weather
app because everyone can relate themselves to weather .If I talk about
technical aspects for the andorid’s framework , through Clouds App I have
touched most of the framework’s apis.So I should start with the
development process of the app.
Just a glance over Android’s Architecture : Android framework is built
over the Linux Kernel , so all the device drivers , security modules are just
like as we have in our linux kernel .
Clouds App – by Arindam Mishra
Team Name : arindam7
Wipro ID : AR277544
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Clouds App – Wipro CODE STORM App Hack
2015
So as we can see from the Android’s architecture , that android framework
is a software stack with different layers with different responsibilities over
Linux Kernel .
The Android framework is designed by keeping one most important thing
in the mind that our mobile devices are resource constraint , by this
statement I mean that mobile devices have limited RAM , CPU power and
the battery life .
I will show you the flow process for building an Android
Application .
So , this app development flow has five phases , its brief description is
below:
1) Android Project : In Clouds App I have used Android Studio for
development , as it is recommended by Google to get the best out of
the Android’s framework .So after completing all the coding ,I will
move to building the project .
2) Build the Project :In my app I have used Gradle for building the
project .There are many reasons for supporting Gradle , we don’t
have to add jar files manually , as we do in eclipse .In gradle I just
have to give all my project’s dependencies in the “build.gradle”
Clouds App – by Arindam Mishra
Team Name : arindam7
Wipro ID : AR277544
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Clouds App – Wipro CODE STORM App Hack
2015
file.That’s it all the heavy lifting of building the project is done by
gradle .
3) Android Package .apk file generation : So finally we have to
generate the Android’s executable file “.apk” . Android package not
only contains my android’s activity java code but the uncompiled
resources also .In the Clouds App , there are many uncompiled
resources like app image resources , string rsouces etc .
4) ART and DALVIK : So just like our java programs run on
JavaVirtualMachine , in the same manner Android’s executables run
on
DalvikVirtualMachine
(DVM).
DVM
compiles
the
.dex(DalvikExecutableFormat) files which is generated during the
build process of the app . These .dex files will be present in the
Android’s
packaged
.apk
file
.
Now Google has replaced DVM by ART . Android runtime (ART) is
the managed runtime used by applications and some system
services on Android. ART and its predecessor Dalvik were
originally created specifically for the Android project. ART as the
runtime executes the Dalvik Executable format and Dex bytecode
specification.ART and Dalvik are compatible runtimes running Dex
bytecode, so apps developed for Dalvik should work when running
with ART.
5) Signing : Now the .apk is ready , but before it goes for the
installation to any device it needs to be digitally signed by the
developer . Android Studio supports two types of signing and .apk
generation . One is debug release and the second one is production
release . Clouds app is the production-realse signed apk file .
6) So the last phase is to install the apk either on a virtual device or
any real device . I have used my tablet (with USB debugging
enabled on it ) throughout the app built process to debug as well as
to run the production release apk file .
Clouds App – by Arindam Mishra
Team Name : arindam7
Wipro ID : AR277544
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Clouds App – Wipro CODE STORM App Hack
2015
So now something specific to the Clouds App
Functionality : Clouds App is a weather forecast app , it gives user the
weather forecast for 14 days .Cloulds App take location postal code as input
to search for the weather conditions .I have selected the postal code to be
given as an input because user may make a spelling mistake while giving
the city name as an input . It allows the user to share the weather info to all
the other apps installed on the device .
Clouds app also show the weather notifications on the notification bar of
the device .
As the android framework provides us to fire the implicit intent to other
activities , I have utilized this feature .So I launced an implicit intent to the
maps app with the location info . So the user can also see the weather of the
location and the map as well .
So how Clouds App is getting the real time weather data for 200,000
cities all over the world .
I have used Open Weather Map api , it is http based rest api to provide the
weather data in JSON and XML format , I have used JSON format .
http://openweathermap.org/api.
I have placed the screenshots also in the folder , please check it .
Best regards ,
Arindam Mishra (WT01 - Banking & Financial Services)
Wipro Emp ID : AR277544
TeamName: arindam7
Team Leader :Arindam Mishra
Clouds App – by Arindam Mishra
Team Name : arindam7
Wipro ID : AR277544
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