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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 com.android.hardware.usb.externalmanagementtest;
     17 
     18 import java.util.HashMap;
     19 import java.util.LinkedList;
     20 
     21 import android.content.Context;
     22 import android.hardware.usb.UsbDevice;
     23 import android.hardware.usb.UsbInterface;
     24 import android.hardware.usb.UsbManager;
     25 import android.text.TextUtils;
     26 
     27 public class UsbUtil {
     28     public static final String ADB_INTERFACE_NAME = "ADB Interface";
     29     public static final String AOAP_INTERFACE_NAME = "Android Accessory Interface";
     30     public static final String MTP_INTERFACE_NAME = "MTP";
     31 
     32     public static LinkedList<UsbDevice> findAllPossibleAndroidDevices(UsbManager usbManager) {
     33         HashMap<String, UsbDevice> devices = usbManager.getDeviceList();
     34         LinkedList<UsbDevice> androidDevices = null;
     35         for (UsbDevice device : devices.values()) {
     36             if (possiblyAndroid(device)) {
     37                 if (androidDevices == null) {
     38                     androidDevices = new LinkedList<>();
     39                 }
     40                 androidDevices.add(device);
     41             }
     42         }
     43         return androidDevices;
     44     }
     45 
     46     public static boolean possiblyAndroid(UsbDevice device) {
     47         int numInterfaces = device.getInterfaceCount();
     48         for (int i = 0; i < numInterfaces; i++) {
     49             UsbInterface usbInterface = device.getInterface(i);
     50             String interfaceName = usbInterface.getName();
     51             // more thorough check can be added, later
     52             if (AOAP_INTERFACE_NAME.equals(interfaceName) ||
     53                     ADB_INTERFACE_NAME.equals(interfaceName) ||
     54                     MTP_INTERFACE_NAME.equals(interfaceName)) {
     55                 return true;
     56             }
     57         }
     58         return false;
     59     }
     60 
     61     public static boolean isTheSameDevice(UsbDevice l, UsbDevice r) {
     62         if (TextUtils.equals(l.getManufacturerName(), r.getManufacturerName()) &&
     63                 TextUtils.equals(l.getProductName(), r.getProductName()) &&
     64                 TextUtils.equals(l.getSerialNumber(), r.getSerialNumber())) {
     65             return true;
     66         }
     67         return false;
     68     }
     69 
     70     public static boolean isDevicesMatching(UsbDevice l, UsbDevice r) {
     71         if (l.getVendorId() == r.getVendorId() && l.getProductId() == r.getProductId() &&
     72                 TextUtils.equals(l.getSerialNumber(), r.getSerialNumber())) {
     73             return true;
     74         }
     75         return false;
     76     }
     77 
     78     public static boolean isDeviceConnected(UsbManager usbManager, UsbDevice device) {
     79         HashMap<String, UsbDevice> devices = usbManager.getDeviceList();
     80         for (UsbDevice dev : devices.values()) {
     81             if (isDevicesMatching(dev, device)) {
     82                 return true;
     83             }
     84         }
     85         return false;
     86     }
     87 }
     88