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From Android 6.0 Marshmallow, the application will not be granted any permissions at installation time. Step 1įirst, we need to access permission of read and write data, and for this, we need to write permission in the Android Manifest file, like below: When we want to retrieve data from the cursor, we have to first move to the first record, so we have to use moveToFirst, and for next records, we need to use moveToNext. The columnIndex is the number of the column you are accessing.

With the getString(columnIndex) method, you can access the column data for the current position of the result. Cursor is a class which represents the result of a query and basically points to one row of the query result. To retrieve contacts from the Android system, we also need to know what cursor is. PurposeĪccess all contacts from the Contacts app of the Android system and show it to a text view label. In this blog, we will learn how to access all contacts from our phone with the help of the Content Provider and display a phone number with a name in a text view.

The Content Resolver and Content Provider classes work together to ensure secure access to other applications’ data. The Content Resolver decides which provider to use based on the URI. The Content Resolver is responsible for finding the correct content provider. The content provider can internally use any place to store its data, like a local file, local database, or some remote service. A content supplier is a holder of special content, it gives well-defined APIs to read, insert, update, and delete that data.

The Android.Content package contains these classes for accessing and publishing data. Also, a helper class is needed for this purpose: this is Content Resolver. The Android framework enforces a robust data sharing model: Content Provider. In the Android system, applications are not allowed to directly access other applications' internal data.