IResourceMetricCollector The interface for user to implement customized resource collectors. 


DeviceBatteryResourceMetricCollector This collector collects device battery metrics. 
DeviceInternetAccessibilityResourceMetricCollector The collector pings to check if the device has internet accessibility or not. 
DeviceStorageAgeResourceMetricCollector Parse storage age from logcat. 
DeviceWifiResourceMetricCollector The collector collects current connected wifi signal strength and link speed metrics. 
ResourceMetricUtil Utility functions for composing metrics.