In this chapter, you learned how to mitigate the most important vulnerabilities that can affect our Android application. You know how to use regular expressions in order to validate an input. You have also learned about SQL injections and how parameterized queries can help overcome this vulnerability. We know how to handle user and critical information. Finally, we learned how to use Intents and content providers in the most secure way possible.

In the next chapter, you will learn how to preserve the privacy of our data. You will learn how to handle the data when stored locally, the different possibilities, and ways to secure them. You will also learn about cryptography and how to encrypt local data.