A basic app showing how to use App usage statistics API to let users collect statistics related to usage of the applications.
The App usage statistics API allows app developers to collect statistics related to usage of the applications. This API provides more detailed usage information than the deprecated getRecentTasks() method.
This example illustrates how to use the App usage statistics API by showing the applications sorted by the timestamp of the last time each app was used.
To use this API, you must first declare the
android.permission.PACKAGE_USAGE_STATS permission in your manifest. The user must also enable access for this app through
Settings > Security > Apps with usage access.
To collect the statistics of the app usage, you need to first get the instance of UsageStatsManager by the following code:
mUsageStatsManager = (UsageStatsManager) getActivity() .getSystemService(Context.USAGE_STATS_SERVICE);
Then you can retrieve the statistics of the app usage by the following method:
Calendar cal = Calendar.getInstance(); cal.add(Calendar.YEAR, -1); List<UsageStats> queryUsageStats = mUsageStatsManager .queryUsageStats(UsageStatsManager.INTERVAL_DAILY, cal.getTimeInMillis(), System.currentTimeMillis());
The first argument of the queryUsageStats() is used for the time interval by which the stats are aggregated. The second and the third arguments are used for specifying the beginning and the end of the range of the stats to include in the results.
This sample uses the Gradle build system. To build this project, use the “gradlew build” command or use “Import Project” in Android Studio.
If you've found an error in this sample, please file an issue: https://github.com/googlesamples/android-AppUsageStatistics
Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
Copyright 2014 The Android Open Source Project, Inc.
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