|  | AdbTest is a sample program that implements a subset of the adb USB protocol. | 
|  | Currently it only implements the "adb logcat" command and displays the log | 
|  | output in a text view and only allows connecting to one device at a time. | 
|  | However the support classes are structured in a way that would allow | 
|  | connecting to multiple devices and running multiple adb commands simultaneously. | 
|  |  | 
|  | This program serves as an example of the following USB host features: | 
|  |  | 
|  | - Matching devices based on interface class, subclass and protocol (see device_filter.xml) | 
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|  | - Asynchronous IO on bulk endpoints |