Everyone today owns a good phone, which either has windows, Mac or Operating system. Android is most popular bills .. As an open source platform, it could be installed by phone manufacturer, that produces the manufacturing expense of these to much lesser compared to the phones having their particular OS or any that is paid.

What exactly are Android Applications and their APKs?

Applications that are produced for Android platform are Android application. Each application when developed carries many different files and folders inside, that defines its functionalities and resources, plus to run that app in mobile, one need to create a list that contains all the necessities. This archive file is known as Android Application APK, i.e. Android package kit.

Exactly what does an APK consist of?



APK is a full package containing every one of the necessary data and files that is certainly must to operate an application on the Cell phone. It incorporate

· Source code used to define App's functionalities, generally referred as classes.dex.

· Manifest file, i.e. the file that specifies the

1. Permissions that application needs.

2. Its flow

3. Package

4. Version codes

5. Signatures.

6. Certificates.

7. SHA-1 Digest.

· Libs, is a directory containing compiled code or jar files, used as library for applications.

· Assets, it is a directory which includes arbitrary files like fonts, audio, texts etc. inside it.

· Resources like XML files that define customized for specific cultures of different pages in the application.

· What's more, it contains META-INF directory and res directory.

When an application is developed, after its testing, an export APK is generated where the developer signs the app which has a secret key to prove his authority in the app. Now, this Signed APK is uploaded to Google play store due to the availability for Users.

Every time a person is downloading a credit application through the source like Play Store, he or she is actually downloading and installing the APK of the application on his phone.

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