98 lines
3.7 KiB
Markdown
98 lines
3.7 KiB
Markdown
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Android AppUsageStatistics Sample
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===================================
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A basic app showing how to use App usage statistics API to let users collect statistics related
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to usage of the applications.
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Introduction
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------------
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The [App usage statistics][1] API allows app developers to collect statistics related to usage of
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the applications. This API provides more detailed usage information than the deprecated
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[getRecentTasks()][2] method.
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This example illustrates how to use the App usage statistics API by showing the applications sorted
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by the timestamp of the last time each app was used.
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To use this API, you must first declare the `android.permission.PACKAGE_USAGE_STATS` permission
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in your manifest. The user must also enable access for this app through
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`Settings > Security > Apps with usage access`.
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To collect the statistics of the app usage, you need to first get the instance of
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[UsageStatsManager][3] by the following code:
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```java
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mUsageStatsManager = (UsageStatsManager) getActivity()
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.getSystemService(Context.USAGE_STATS_SERVICE);
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```
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Then you can retrieve the statistics of the app usage by the following method:
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```java
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Calendar cal = Calendar.getInstance();
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cal.add(Calendar.YEAR, -1);
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List<UsageStats> queryUsageStats = mUsageStatsManager
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.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, cal.getTimeInMillis(),
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System.currentTimeMillis());
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```
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The first argument of the [queryUsageStats()][4] is used for the time interval by which the
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stats are aggregated. The second and the third arguments are used for specifying the beginning
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and the end of the range of the stats to include in the results.
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[1]: https://developer.android.com/reference/android/app/usage/package-summary.html
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[2]: https://developer.android.com/reference/android/app/ActivityManager.html#getRecentTasks(int%2C%20int)
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[3]: https://developer.android.com/reference/android/app/usage/UsageStatsManager.html
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[4]: https://developer.android.com/reference/android/app/usage/UsageStatsManager.html#queryUsageStats(int%2C%20long%2C%20long)
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Pre-requisites
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--------------
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- Android SDK 27
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- Android Build Tools v27.0.2
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- Android Support Repository
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Screenshots
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-------------
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<img src="screenshots/screenshot-1.png" height="400" alt="Screenshot"/> <img src="screenshots/screenshot-2.png" height="400" alt="Screenshot"/>
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Getting Started
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---------------
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This sample uses the Gradle build system. To build this project, use the
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"gradlew build" command or use "Import Project" in Android Studio.
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Support
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-------
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- Google+ Community: https://plus.google.com/communities/105153134372062985968
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- Stack Overflow: http://stackoverflow.com/questions/tagged/android
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If you've found an error in this sample, please file an issue:
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https://github.com/googlesamples/android-AppUsageStatistics
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Patches are encouraged, and may be submitted by forking this project and
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submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
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License
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-------
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Copyright 2017 The Android Open Source Project, Inc.
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Licensed to the Apache Software Foundation (ASF) under one or more contributor
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license agreements. See the NOTICE file distributed with this work for
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additional information regarding copyright ownership. The ASF licenses this
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file to you under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License.
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