### Get UsageStatsManager Instance

Source: https://github.com/googlesamples/android-appusagestatistics/blob/master/README.md

Obtain an instance of UsageStatsManager to access app usage statistics. This is a prerequisite for querying usage data.

```java
mUsageStatsManager = (UsageStatsManager) getActivity()
       .getSystemService(Context.USAGE_STATS_SERVICE);
```

--------------------------------

### Query App Usage Statistics

Source: https://github.com/googlesamples/android-appusagestatistics/blob/master/README.md

Retrieve app usage statistics for a specified time interval. The query can be filtered by daily, weekly, monthly, or yearly intervals and a custom date range.

```java
Calendar cal = Calendar.getInstance();
cal.add(Calendar.YEAR, -1);
List<UsageStats> queryUsageStats = mUsageStatsManager
        .queryUsageStats(UsageStatsManager.INTERVAL_DAILY, cal.getTimeInMillis(),
                System.currentTimeMillis());
```

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