gistfile1.txt

One can specifies a different port than the usual 8080 to make it unique and avoid any errors, in case another service is using Jenkins
java -jar jenkins.war --httpPort=9091
Next Step: Configure Jenkins
Manage Jenkins > Configure System

Mentioned the ANDROID_HOME as my Android SDK path variable in Global properties.

2. Manage Jenkins > Global Tool Configuration

Here I told Jenkins where it can find GIT.

Next Step : Add New Item

Adding New Item is the easy part .Enter Item Name [ Android Application/Project Name ] and Select Freestyle project .
Click OK.

Next Step : Configure New Item
Next, go to Source Code Management. Configure you repository with Jenkins like below .

Also we need to git Credentials .So click on Add and your Credentials.

Select the newly added Credentials .

In Build Triggers, select Poll SCM
and add Schedule :
* * * * * 
Five time “*” with space .Which mean Jenkins will check after every minute if there are any changes in the git repository it will run the build.

In Build , Add build step > Invoke Gradle script

Select Use Gradle Wrapper and add the following tasks
clean
assembleDebug 
test
connectedAndroidTest

Lets add some Post-build Actions .
Publish JUnit test result report


2. Archive the artifacts


3. Editable Email Notification


In Project Recipient List add emails to which you would like to send email after each build . In above configuration I have attached the APK and the Build Log file .
All done .Click Apply and Save.
The Result .