Android Tutorial

By : Ketan Bhimani

332 

calls.moveToFirst();
while (!calls.isAfterLast()) {
Log.d(DEBUG_TAG, “Duration: “ + calls.getInt(durIdx));
totalDuration += calls.getInt(durIdx);
calls.moveToNext();
}
Log.d(DEBUG_TAG, “HourlyClient123 Total Call Duration: “ +
totalDuration);

This code is similar to the code shown for the MediaStore audio

files.Again, we start with listing our requested columns: the call

label and the duration of the call. This time, however, we don’t

want to get every call in the log, only those with a label of

HourlyClient123.To filter the results of the query to this specific

label, it is necessary to specify the third and fourth parameters of

the managedQuery() call. Together, these two parameters are

equivalent to a database WHERE clause. The third parameter

specifies the format of the WHERE clause with the column name

with selection parameters (shown as ?s) for each selection

argument value. The fourth parameter, the String array, provides

the values to substitute for each of the selection arguments (?s) in

order as you would do for a simple SQLite database query.

As before, the Activity manages the Cursor object lifecycle. We use

the same method to iterate the records of the Cursor and add up all

the call durations.

Accessing Content Providers That Require Permissions

Your application needs a special permission to access the

information provided by the CallLog content provider. You can

declare the uses-permission tag using the Eclipse Wizard or by

adding the following to your AndroidManifest.xml file:

<uses-permission
xmlns:android=http://schemas.android.com/apk/res/android