Android study notes (8) ContentProvider

1. ContentProvider Concept

Basic concepts:
1. ContentProvider provides a unified interface for data storage and retrieval.
2. Use ContentProvider to share data between different applications.
3. Android provides ContentProvider (including audio, video, image, and address book) for common data)
 
Functions provided by ContentProvider:

 

Query ()	Query
Insert ()	Insert
Update ()	Update
Delete ()	Delete
GetType ()	Obtain the Data Type
OnCreat ()	Create a data callback function

 

2. Implementation of ContentProvider

 
The process of implementing ContentProvider:
1. Define a CONTENT_URI constant.
2. Define a class that inherits ContentProvider.
3. Implement the query (), insert (), update (), delete (), getType (), and onCreate () methods.
4. Declare in AndroidManifest. xml.

 

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