Android Learning Note-contentprovider

1.ContentProvider provides a unified interface for storing and retrieving data

2. Use ContentProvider to share data between different applications

3.Android provides contentprovider for some common data (including audio, video, images, contacts, etc.)

ContentProvider to organize data using a table Form

_id	number	number_key	label	name	type
11	1348729883	2001	ss	yd	type_work
12	15572706076	2011	s	yy	type_home

Functions provided by ContentProvider

Query () queries

Insert () insertion

Update () Updates

Delete () remove

GetType () Get data type

OnCreate () callback function at the time of creation

the process of realizing ContentProvider

1. Define a Content_uri constant

2. Define a class that inherits ContentProvider

3. Implement query Insert update Delete GetType onCreate

4. Declaration in Androidmanifest.xml

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Android Learning Note-contentprovider