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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package android.car.usb.handler;
     17 
     18 import android.hardware.usb.UsbDevice;
     19 import android.hardware.usb.UsbDeviceConnection;
     20 import android.hardware.usb.UsbManager;
     21 import android.text.TextUtils;
     22 import java.io.IOException;
     23 import java.util.ArrayList;
     24 import java.util.HashMap;
     25 import java.util.List;
     26 
     27 /**
     28  * Util methods to work with USB devices.
     29  */
     30 class UsbUtil {
     31     public static List<UsbDevice> findAllPossibleAndroidDevices(UsbManager usbManager) {
     32         HashMap<String, UsbDevice> devices = usbManager.getDeviceList();
     33     ArrayList<UsbDevice> androidDevices = new ArrayList<>(devices.size());
     34         for (UsbDevice device : devices.values()) {
     35             UsbDeviceConnection connection = openConnection(usbManager, device);
     36             if (AoapInterface.isSupported(connection)) {
     37                 androidDevices.add(device);
     38             }
     39             connection.close();
     40         }
     41         return androidDevices;
     42     }
     43 
     44     public static UsbDeviceConnection openConnection(UsbManager manager, UsbDevice device) {
     45     manager.grantPermission(device);
     46     return manager.openDevice(device);
     47     }
     48 
     49     public static void sendAoapAccessoryStart(UsbDeviceConnection connection, String manufacturer,
     50             String model, String description, String version, String uri, String serial)
     51                     throws IOException {
     52         AoapInterface.sendString(connection, AoapInterface.ACCESSORY_STRING_MANUFACTURER,
     53                                  manufacturer);
     54         AoapInterface.sendString(connection, AoapInterface.ACCESSORY_STRING_MODEL,
     55                                  model);
     56         AoapInterface.sendString(connection, AoapInterface.ACCESSORY_STRING_DESCRIPTION,
     57                                  description);
     58         AoapInterface.sendString(connection, AoapInterface.ACCESSORY_STRING_VERSION,
     59                                  version);
     60         AoapInterface.sendString(connection, AoapInterface.ACCESSORY_STRING_URI, uri);
     61         AoapInterface.sendString(connection, AoapInterface.ACCESSORY_STRING_SERIAL,serial);
     62         AoapInterface.sendAoapStart(connection);
     63     }
     64 
     65     public static boolean isTheSameDevice(UsbDevice l, UsbDevice r) {
     66         if (TextUtils.equals(l.getManufacturerName(), r.getManufacturerName())
     67                 && TextUtils.equals(l.getProductName(), r.getProductName())
     68                 && TextUtils.equals(l.getSerialNumber(), r.getSerialNumber())) {
     69             return true;
     70         }
     71         return false;
     72     }
     73 
     74     public static boolean isDevicesMatching(UsbDevice l, UsbDevice r) {
     75         if (l.getVendorId() == r.getVendorId() && l.getProductId() == r.getProductId()
     76                 && TextUtils.equals(l.getSerialNumber(), r.getSerialNumber())) {
     77             return true;
     78         }
     79         return false;
     80     }
     81 
     82     public static boolean isDeviceConnected(UsbManager usbManager, UsbDevice device) {
     83         HashMap<String, UsbDevice> devices = usbManager.getDeviceList();
     84         for (UsbDevice dev : devices.values()) {
     85             if (isDevicesMatching(dev, device)) {
     86                 return true;
     87             }
     88         }
     89         return false;
     90     }
     91 }
     92