Dear sir,
I have very interest about your job.
I'm Android Expert.
I have STRONG experience of android app develop for 7 years.
Your app can use SQLite db within android device.
I am android app honest developer that have a lot of experience in app developing.
If selected for the project, I would like to start immediately and devote my creative suggestions to your project in order to serve you better.
I'm well trained and totally competent ,so that I ALWAYS produce highly satisfactory results and I'm valued highly as a very competent and reliable worker.
Your job really caught my eyes because my experience and expertise are perfect match for your job.
I would be happy to provide further information at interview.
I hope I have demonstrated to you my interest and motivation to get involved in your project.
Looking forward to your good reply.
Thank you for the opportunity to submit my proposal for your project.
Best regards.