Android

Content Provider Basics

            A content provider supplier oversees access to a focal store of information. A supplier is a piece of an Android application, which frequently gives its own UI to working with the information.

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Be that as it may, content suppliers are principally proposed to be utilized by different applications, which get to the supplier utilizing a supplier customer protest.

Together, suppliers and supplier customers offer a reliable, standard interface to information that additionally handles between process correspondence and secure information get to.

            Regularly you work with substance suppliers in one of two situations; you might need to actualize code to get to a leaving content supplier in another application, or you might need to make another substance supplier in your application to impart information to different applications. This theme covers the nuts and bolts of working with existing substance suppliers.

Imparting access to your application information to different applications

Sending information to a gadget

Returning custom look recommendations for your application through the inquiry structure utilizing Search Recent Suggestions Provider

Synchronizing application information with your server utilizing a usage of Abstract Threaded Sync Adapter

Stacking information in your UI utilizing a Cursor Loader.

Accessing a Provider

          When you need to get to information in a substance supplier, you utilize the Content Resolver question in your application's Context to speak with the supplier as a customer.

The Content Resolver protest speaks with the supplier question, an occasion of a class that actualizes Content Provider.

The supplier question gets information demands from customers, plays out the asked for activity, and returns the outcomes. This protest has strategies that call indistinguishably named techniques in the supplier question, an occurrence of one of the solid subclasses of Content Provider.       

The Content Resolver strategies give the fundamental "Muck" (make, recover, refresh, and erase) elements of relentless stockpiling.

Content URIs

To query a content provider, you specify the query string in the form of a URI which has following format

<prefix>://<authority>/<data_type>/<id>

Prefix

            This is always set of content://

Authority

            This indicates the name of the substance supplier, for instance contacts, program and so on. For outsider substance suppliers, this could be the completely qualified name, such as com.tutorialspoint.statusprovider

Data_type

            This demonstrates the sort of information that this specific supplier gives. For instance, in the event that you are getting every one of the contacts from the Contacts content supplier, then the data path would be individuals and URI look like thiscontent://contacts/people

id

            This determines the particular record asked. For instance, in the event that you are searching for contact number 5 in the Contacts content provider then URI would look like this content://contacts/people/5.

Create Content Provider

           ·     First of all you need to create a Content Provider class that extends the                                     ContentProviderbaseclass.                                              

·         Second, you need to define your content provider URI address which will be used to  access the content.
·          Next you will need to create your own database to keep the content. Usually, Android uses SQLite database and framework needs to override onCreate() method which will  use SQLite Open Helper method to create or open the provider's database. When your  application is launched, the onCreate() handler of each of its Content Providers is  called on the main application thread
·   Next you will have to implement Content Provider queries to perform different  database specific operations.
·    Finally register your Content Provider in your activity file using <provider> tag.

Android @ Besant Technologies

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