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105 lines
3.8 KiB
105 lines
3.8 KiB
4 months ago
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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright 2014 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of 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,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<sample>
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<name>AppUsageStatistics</name>
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<group>System</group>
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<package>com.example.android.appusagestatistics</package>
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<minSdk>21</minSdk>
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<dependency>com.android.support:recyclerview-v7:+</dependency>
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<dependency>com.android.support:appcompat-v7:21.+</dependency>
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<strings>
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<intro>
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<![CDATA[
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This sample explains how to use App usage statistics API, which was introduced
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in Android 5.0.
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]]>
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</intro>
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</strings>
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<template src="base" />
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<metadata>
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<status>PUBLISHED</status>
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<categories>System</categories>
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<technologies>Android</technologies>
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<languages>Java</languages>
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<solutions>Mobile</solutions>
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<level>INTERMEDIATE</level>
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<icon>screenshots/web-icon.png</icon>
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<screenshots>
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<img>screenshots/screenshot-1.png</img>
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<img>screenshots/screenshot-2.png</img>
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</screenshots>
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<api_refs>
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<android>android.app.usage.UsageStats</android>
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<android>android.app.usage.UsageStatsManager</android>
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</api_refs>
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<description>
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<![CDATA[
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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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]]>
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</description>
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<intro>
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<![CDATA[
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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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]]>
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</intro>
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</metadata>
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</sample>
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