USB Enumerator Sample (Java)
This application demonstrates accessing the
UsbManager Android API from within
an Android Things application. The sample application iterates over all the
USB devices discovered by the host and prints their interfaces and endpoints.
- Android Things compatible board
- Android Studio 2.2+
Import the project using Android Studio and deploy it to your device. The application prints the list of connected USB devices. Connect any USB peripheral to one of the host ports on your device. The application connects to that specific device, parses its descriptors, and prints out more detailed information about its configuration.
The Android USB Host APIs behave differently on Android Things because user-granted permission dialogs are not enabled. This sample takes these changes into account, and does not request device access permissions that would otherwise be required on an Android mobile device.
Enable auto-launch behavior
This sample app is currently configured to launch only when deployed from your
development machine. To enable the main activity to launch automatically on boot,
add the following
intent-filter to the app's manifest file:
<activity ...> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.HOME"/> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> </activity>
Copyright 2017 The Android Open Source Project, Inc.
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.