Android Tutorial

Android Tutorial 331

audio files at this location. By using the managedQuery() method,

we get a managed Cursor as a result. We then examine our Cursor

for the results.

Using the CallLog Content Provider

Android provides a content provider to access the call log on the

handset via the class android.provider.CallLog. At first glance, the

CallLog might not seem to be a useful provider for developers, but

it has some nifty features. You can use the CallLog to filter recently

dialed calls, received, and missed calls. The date and duration of

each call is logged and tied back to the Contact application for

caller identification purposes.

The CallLog is a useful content provider for customer relationship

management (CRM) applications. The user can also tag specific

phone numbers with custom labels within the Contact application.

To demonstrate how the CallLog content provider works, let’s look

at a hypothetical situation where we want to generate a report of

all calls to a number with the custom labeled

HourlyClient123.Android allows for custom labels on these

numbers, which we leverage for this example:

String[] requestedColumns = {
CallLog.Calls.CACHED_NUMBER_LABEL,CallLog.Calls.DURATION
};
Cursor calls = managedQuery(
CallLog.Calls.CONTENT_URI, requestedColumns,
CallLog.Calls.CACHED_NUMBER_LABEL

• “ = ?”, new String[] { “HourlyClient123” } , null);
  Log.d(DEBUG_TAG, “Call count: “ + calls.getCount());
  int durIdx = calls.getColumnIndex(CallLog.Calls.DURATION);
  int totalDuration = 0;