Step 7, step 4, getting started with Piglet Android

Step 7, step 4, getting started with Piglet Android

Step 7, step 4, getting started with Piglet Android

Data storage and access for Android-ContentProvider)

--- Reprinted with the source: coder-pig

This section introduces:

In the previous study, we have learned some ways to store data, which can be shared. For example, for files, we can perform operations

The mode is set to Context. MODE_WORLD_READABLE or Context. MODE_WORLD_WRITEABLE. Other applications

You can access the file for read and write operations. SharedPreference can also be used for sharing, and permissions can also be set! And use

The benefit of ContentProvider's data sharing is that the same data access method! This is the only way to share data between different applications, because

For a storage region that does not provide the access of all applications in Android! Well, it's actually not that mysterious. Please follow the author's instructions below.

To parse the ContentProvider of Android!

This section describes the road map:

Body:

ContentProvider overview and execution principles

Custom ContentProvider

Reference code:

Code Effect: Insert a record into the database of the first program through the second program

Download reference code:Code download

Use the ContentProvider provided by the system

Code example: Call the SMS and contacts provided by the system

Download reference code:Code download

Listen for ContentProvider data changes

Download:Code download