Security and permissions

Security concept in Android

The Android system installs every Android application with a unique user and group ID. Each application file is private to this generated user, e.g. other applications cannot access these files. In addition each Android application is started in its own process.

Therefore, by means of the underlying Linux operating system, every Android application is isolated from other running applications.

If data should be shared, the application must do this explicitly, e.g. via a service or a content provider.