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1 | /* |
2 | * This file is part of the sigrok-androidutils project. | |
3 | * | |
4 | * Copyright (C) 2016 Marcus Comstedt <marcus@mc.pp.se> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | package org.sigrok.androidutils; | |
21 | ||
22 | import android.content.BroadcastReceiver; | |
23 | import android.content.Context; | |
24 | import android.content.Intent; | |
25 | import android.content.IntentFilter; | |
26 | import android.hardware.usb.UsbDevice; | |
27 | import android.hardware.usb.UsbManager; | |
28 | import android.util.Log; | |
29 | ||
30 | final class UsbEventMonitor | |
31 | { | |
32 | private final Context context; | |
33 | private final UsbManager manager; | |
34 | private final UsbEventListener listener; | |
35 | private final BroadcastReceiver permReceiver; | |
36 | private final BroadcastReceiver hotplugReceiver; | |
37 | private final IntentFilter permFilter; | |
38 | private final IntentFilter hotplugFilter; | |
39 | ||
40 | UsbEventMonitor(Context context, UsbManager manager, UsbEventListener listener) | |
41 | { | |
42 | this.context = context; | |
43 | this.manager = manager; | |
44 | this.listener = listener; | |
45 | permReceiver = new BroadcastReceiver() { | |
46 | @Override | |
47 | public void onReceive(Context context, Intent intent) { | |
48 | String action = intent.getAction(); | |
49 | if (UsbSupplicant.ACTION_USB_PERMISSION.equals(action)) { | |
50 | permissionCallback((UsbDevice)intent.getParcelableExtra( | |
51 | UsbManager.EXTRA_DEVICE), intent.getBooleanExtra( | |
52 | UsbManager.EXTRA_PERMISSION_GRANTED, false)); | |
53 | } | |
54 | } | |
55 | }; | |
56 | hotplugReceiver = new BroadcastReceiver() { | |
57 | @Override | |
58 | public void onReceive(Context context, Intent intent) { | |
59 | if (intent != null && UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(intent.getAction())) { | |
60 | attachCallback((UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE)); | |
61 | } else if (intent != null && UsbManager.ACTION_USB_DEVICE_DETACHED.equals(intent.getAction())) { | |
62 | detachCallback((UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE)); | |
63 | } | |
64 | } | |
65 | }; | |
66 | permFilter = new IntentFilter(UsbSupplicant.ACTION_USB_PERMISSION); | |
67 | hotplugFilter = new IntentFilter(UsbManager.ACTION_USB_DEVICE_ATTACHED); | |
68 | hotplugFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); | |
69 | } | |
70 | ||
71 | synchronized void start() | |
72 | { | |
73 | context.registerReceiver(permReceiver, permFilter); | |
74 | context.registerReceiver(hotplugReceiver, hotplugFilter); | |
75 | } | |
76 | ||
77 | synchronized void stop() | |
78 | { | |
79 | context.unregisterReceiver(hotplugReceiver); | |
80 | context.unregisterReceiver(permReceiver); | |
81 | } | |
82 | ||
83 | private void permissionCallback(UsbDevice dev, boolean granted) | |
84 | { | |
85 | Log.d("UsbEventMonitor", "permission " + | |
86 | (granted ? "granted" : "denied") + " for device " + dev); | |
87 | addRemoveDevice(dev, !granted); | |
88 | } | |
89 | ||
90 | private void attachCallback(UsbDevice dev) | |
91 | { | |
92 | Log.d("UsbEventMonitor", "device " + dev + "added"); | |
93 | if (manager.hasPermission(dev)) | |
94 | addRemoveDevice(dev, false); | |
95 | } | |
96 | ||
97 | private void detachCallback(UsbDevice dev) | |
98 | { | |
99 | Log.d("UsbEventMonitor", "device " + dev + "removed"); | |
100 | addRemoveDevice(dev, true); | |
101 | } | |
102 | ||
103 | private synchronized void addRemoveDevice(UsbDevice dev, boolean removed) | |
104 | { | |
105 | listener.onUsbDeviceAction(dev.getDeviceName(), removed); | |
106 | } | |
107 | } |