If you need to provide data to other applications, consider implementing
a ContentProvider:
http://developer.android.com/reference/android/content/ContentProvider.html
This has the following benefits in your described use scenario:
- You can protect your data by declaring read and/or write permissions
for the content provider in your manifest;
- CP lifecycle is managed by Android, it will be loaded and initialized
as soon as it's needed (based on the authority URI);
- You keep implementation details private to your CP code (the database
schema, the mapping between URIs and tables, etc.);
- Your CP will be instantiated only once, so you won't need to solve any
problems like "is the database already open, and in which process";
- The framework provides URI-based data update notifications that can be
observed by ListViews and their CursorAdapters, so you can get "live"
views into your data at little or no extra effort.
If you're creating custom firmware with your application pre-installed,
you can still use a CP and get the benefits described above, but in
addition, you can require that only applications signed with the
firmware key are able to get write access to your data (for an example,
look at the standard email application in Android source).
-- Kostya
12.01.2011 18:54, androiddevelopers пишет:
Hi,
I want to create an database for my service . as of now we are
creating the database on invocation of the service.
Here we create the Database and add default values and it works.
My Need : I want to have a database as part of the system image ( That
is when i flash the image/APK) . The database should be present
already rather than me populating when i launch the service.here my
use case is that database can be accessed by any app in read only mode
but the database value is written by my service only.so i just want
the database being present , before my service is launched so that any
app can access the database.
Gs
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