8 Internal Concepts of Android Operating System

8 Internal Concepts of Android Operating System

1. ·         Android System uses Ext4 file system of Linux. Earlier versions uses YAFFS (Yet Another Flash File System) file System. The device vendors replace the file system.
2. ·         Each Application runs in its own process space and use a separate Dalvik VM.
3. ·         Each process can share its data by defining Content Provider.
4. ·         The applications signed with same signature can be shared using the same android:sharedUserId
5. ·         To protect the applications “Copy Protection” option allows the applications to install in data/app-private folder. This is not accessible directly to end user. The further protection can be implement using license services.
6. ·         Android OS has no swap space
7. ·         JNI interface which is a call gate for the C/C++ for JAVA is used to interface the native system
8. ·         .class is processed by dx utility to generate the .dex file