Introduction - If you have any usage issues, please Google them yourself
When applying inheritance ContentProvider class, and override methods class is used to provide data and storage of data, it can share its data to other applications. Although the use of other methods may also external shared data, but data access because of the way data is stored and different, such as: the use of papers share of external data, the need for file operations to read and write data use sharedpreferences share data, you need to read sharedpreferences API write data. The benefits of using shared data ContentProvider unified data access method.