Wirelessly data storage and a brief introduction to ContentProvider

1. Introduction to how Android data is stored

File storage sharedprefrence Storage Conmtentprovidersqlitedatabase Networked Storage 2. Please describe how the next contentprovider is for data sharingIf you want to expose your application's data to other applications, you need to create a content provider. Third parties can access the provider through Contentresolver 3. Why use ContentProvider? What is the difference between it and SQL implementation ?ContentProvider block the details of the data storage, the internal implementation of the user is completely transparent, the user only need to care about the operation of the data URI. ContentProvider can also share data between different apps. SQL also has the method of adding and deleting the search, However, the content of the access is limited to the database files under this application. Contentproivider can also be added or deleted to check local files, XML files and so on. 4. Talk about the relationship between Contentprovider,contentresolver,contentobserver.The first is the content provider, the system can provide additions and deletions to the database file method, the second is the content parser, the content parser can access the content provider through a specific URI, call inside the method of adding and deleting, the last is the content listener, can listen to the changes in the database content, When the content of the database changes, the content listener receives the message and handles it accordingly.

Wirelessly data storage and a brief introduction to ContentProvider