But not all projects use these

Android updating cursor

Every time the database connection has to be closed once you are done with database access. You have to create a Loader of course. Here whenever first time CursorLoader is called, onCreateLoader method is called. Queries can be created via the rawQuery and query methods. Thankfully Mark Murphy has written a library that offers enhancements to the Loader framework.

You have to create a Loader

You can set any references to the cursor object you hold to null. The compiler will spot most problems for you and then there is also Lint to help you.

Every time the database connection

Returns the value of that column as a double. Here we will create a list of all the contacts stored in an android device. So you can skip the following part if you just wanted to learn about database operations in Android. Returns the number of rows in the cursor.

The method gets an int value and a Bundle passed in. For this, we need a layout file and Adapter class.

You can and should use this library for projects that must support older versions. Only by doing so, the loader knows about a data change and can call the correct callback methods. You have to use this loader also for deleting, updating or inserting rows as well. If you want to do some tasks, that have to run until completion, do not use Loaders. Use the Empty Activity template.