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 an
14 * limitations under the License.
15 */
16
17package com.android.server.usb;
18
19import android.app.Notification;
20import android.app.NotificationManager;
21import android.app.PendingIntent;
22import android.content.BroadcastReceiver;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentFilter;
27import android.content.pm.PackageManager;
28import android.content.res.Resources;
29import android.hardware.usb.UsbConstants;
30import android.hardware.usb.UsbDevice;
31import android.hardware.usb.UsbInterface;
32import android.hardware.usb.UsbManager;
33import android.os.UserHandle;
34
35/**
36 * Manager for MTP storage notification.
37 */
38class MtpNotificationManager {
39    private static final String TAG = "UsbMtpNotificationManager";
40
41    /**
42     * Subclass for PTP.
43     */
44    private static final int SUBCLASS_STILL_IMAGE_CAPTURE = 1;
45
46    /**
47     * Subclass for Android style MTP.
48     */
49    private static final int SUBCLASS_MTP = 0xff;
50
51    /**
52     * Protocol for Picture Transfer Protocol (PIMA 15470).
53     */
54    private static final int PROTOCOL_PTP = 1;
55
56    /**
57     * Protocol for Android style MTP.
58     */
59    private static final int PROTOCOL_MTP = 0;
60
61    private static final String ACTION_OPEN_IN_APPS = "com.android.server.usb.ACTION_OPEN_IN_APPS";
62
63    private final Context mContext;
64    private final OnOpenInAppListener mListener;
65
66    MtpNotificationManager(Context context, OnOpenInAppListener listener) {
67        mContext = context;
68        mListener = listener;
69        final Receiver receiver = new Receiver();
70        context.registerReceiver(receiver, new IntentFilter(ACTION_OPEN_IN_APPS));
71    }
72
73    void showNotification(UsbDevice device) {
74        final Resources resources = mContext.getResources();
75        final String title = resources.getString(
76                com.android.internal.R.string.usb_mtp_launch_notification_title,
77                device.getProductName());
78        final String description = resources.getString(
79                com.android.internal.R.string.usb_mtp_launch_notification_description);
80        final Notification.Builder builder = new Notification.Builder(mContext)
81                .setContentTitle(title)
82                .setContentText(description)
83                .setSmallIcon(com.android.internal.R.drawable.stat_sys_data_usb)
84                .setCategory(Notification.CATEGORY_SYSTEM);
85
86        final Intent intent = new Intent(ACTION_OPEN_IN_APPS);
87        intent.putExtra(UsbManager.EXTRA_DEVICE, device);
88        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | Intent.FLAG_RECEIVER_FOREGROUND);
89
90        final PendingIntent openIntent = PendingIntent.getBroadcastAsUser(
91                mContext,
92                device.getDeviceId(),
93                intent,
94                PendingIntent.FLAG_UPDATE_CURRENT,
95                UserHandle.SYSTEM);
96        builder.setContentIntent(openIntent);
97
98        final Notification notification = builder.build();
99        notification.flags |= Notification.FLAG_LOCAL_ONLY;
100
101        mContext.getSystemService(NotificationManager.class).notify(
102                TAG, device.getDeviceId(), notification);
103    }
104
105    void hideNotification(int deviceId) {
106        mContext.getSystemService(NotificationManager.class).cancel(TAG, deviceId);
107    }
108
109    private class Receiver extends BroadcastReceiver {
110        @Override
111        public void onReceive(Context context, Intent intent) {
112            final UsbDevice device =
113                    intent.getExtras().<UsbDevice>getParcelable(UsbManager.EXTRA_DEVICE);
114            if (device == null) {
115                return;
116            }
117            switch (intent.getAction()) {
118                case ACTION_OPEN_IN_APPS:
119                    mListener.onOpenInApp(device);
120                    break;
121            }
122        }
123    }
124
125    static boolean shouldShowNotification(PackageManager packageManager, UsbDevice device) {
126        // We don't show MTP notification for devices that has FEATURE_AUTOMOTIVE.
127        return !packageManager.hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE) &&
128                isMtpDevice(device);
129    }
130
131    private static boolean isMtpDevice(UsbDevice device) {
132        for (int i = 0; i < device.getInterfaceCount(); i++) {
133            final UsbInterface usbInterface = device.getInterface(i);
134            if ((usbInterface.getInterfaceClass() == UsbConstants.USB_CLASS_STILL_IMAGE &&
135                    usbInterface.getInterfaceSubclass() == SUBCLASS_STILL_IMAGE_CAPTURE &&
136                    usbInterface.getInterfaceProtocol() == PROTOCOL_PTP)) {
137                return true;
138            }
139            if (usbInterface.getInterfaceClass() == UsbConstants.USB_SUBCLASS_VENDOR_SPEC &&
140                    usbInterface.getInterfaceSubclass() == SUBCLASS_MTP &&
141                    usbInterface.getInterfaceProtocol() == PROTOCOL_MTP &&
142                    "MTP".equals(usbInterface.getName())) {
143                return true;
144            }
145        }
146        return false;
147    }
148
149    static interface OnOpenInAppListener {
150        void onOpenInApp(UsbDevice device);
151    }
152}
153