Recently, I was engaged in testing an android application. The customer generously provided me his new Samsung 750 Tablet with the application installed on it. The application does not interact with any remote server which meant all application data, database schema and files had to be stored locally. From the tutorials and my learning I was expected to find an android installation file (.apk file), install it on a google android emulator and start testing. Unfortunately, the first step itself didn’t meet my expectations.

I shall be releasing the series of android application testing; so this post is focused on setting up an environment, common challenges and confirming all is well before we proceed

Challenge 1:

Extract android application installable file (.apk file) from tablet. The application is running in tablet but not sure whether installation files are removed or hidden by the developer.

Solution

After searching and testing few apps/tricks found by Google results, I finally decided to go with Astro File Manager application. The application is less complicated and fulfils my expectation. Below are the steps to get the .apk file:

Download and install Astro File Manager on your android tablet or phone
Locate and open Astro File Manager
Browse to Application Backup menu
Locate your application from Installed Apps list and select the app (extreme right)
Hit “Backup” button
Check and confirm your application backup in Backup Apps list

Now, we have the backup of our application. Next steps:

Exit Astro File Manager application
Browse to Home Screen and go to My Files folder
Look for backups folder and you will find your .apk file there

Once you have your application .apk file, there are multiple ways to get it onto your PC. I installed a Dropbox application on tablet and then downloaded it onto my PC. Other alternatives are as below:

Attach file to your inbox (< 5MB)
Install Samsung windows driver from here and transfer it via USB.

Next step is to install the application on Android emulator. You can download it from here and installation steps are listed here. Once setup is done, you will have similar running emulator as below:

Installing Assessment Application on Emulator

Post successful SDK toolkit installation; add below strings to your PATH environmental variables (Right click My Computer-->Properties-->Advanced-->Environment Variables):

C:\Program Files\Android\android-sdk\tools;C:\Program Files\Android\android-sdk\platform-tools

We are now ready to install application on android emulator from any location (of course a valid one). The utility to interact with emulator is adb.exe and it can be found under C:\Program Files\Android\android-sdk\platform-tools. Steps are as below:

Open AVD Manager from All Programs and click on Start to run Emulator
Open command prompt and browse till path where you have saved your application apk file
Issue command: adb devices to ensure your emulator is working properly
To install app: adb install app_name.apk
Here's a screenshot of above steps: