1 /*
2  * Copyright (C) 2018 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 
17 package com.android.server.usb;
18 
19 import android.annotation.NonNull;
20 import android.annotation.Nullable;
21 import android.content.ActivityNotFoundException;
22 import android.content.ComponentName;
23 import android.content.Context;
24 import android.content.Intent;
25 import android.content.pm.ResolveInfo;
26 import android.hardware.usb.UsbAccessory;
27 import android.hardware.usb.UsbDevice;
28 import android.hardware.usb.UsbManager;
29 import android.os.UserHandle;
30 import android.util.Slog;
31 
32 import java.util.ArrayList;
33 
34 /**
35  * UsbResolveActivityManager creates UI dialogs for user to pick or confirm handler for
36  * usb attach event.
37  *
38  * @hide
39  */
40 public class UsbHandlerManager {
41     private static final String LOG_TAG = UsbHandlerManager.class.getSimpleName();
42 
43     private final Context mContext;
44 
UsbHandlerManager(@onNull Context context)45     UsbHandlerManager(@NonNull Context context) {
46         mContext = context;
47     }
48 
49     /**
50      * Shows dialog to user to allow them to optionally visit that URL for more
51      * information or software downloads if the attached USB accessory has a valid
52      * URL associated with it.
53      *
54      * @param accessory The accessory to confirm in the UI dialog
55      * @param user The user to start the UI dialog
56      */
showUsbAccessoryUriActivity(@onNull UsbAccessory accessory, @NonNull UserHandle user)57     void showUsbAccessoryUriActivity(@NonNull UsbAccessory accessory,
58             @NonNull UserHandle user) {
59         String uri = accessory.getUri();
60         if (uri != null && uri.length() > 0) {
61             // display URI to user
62             Intent dialogIntent = createDialogIntent();
63             dialogIntent.setComponent(ComponentName.unflattenFromString(
64                     mContext.getResources().getString(
65                             com.android.internal.R.string.config_usbAccessoryUriActivity)));
66             dialogIntent.putExtra(UsbManager.EXTRA_ACCESSORY, accessory);
67             dialogIntent.putExtra("uri", uri);
68             try {
69                 mContext.startActivityAsUser(dialogIntent, user);
70             } catch (ActivityNotFoundException e) {
71                 Slog.e(LOG_TAG, "unable to start UsbAccessoryUriActivity");
72             }
73         }
74     }
75 
76     /**
77      * Shows dialog to user to confirm the package to start when the USB device
78      * or accessory is attached and there is only one package claims to handle this
79      * USB device or accessory.
80      *
81      * @param rInfo The ResolveInfo of the package to confirm in the UI dialog
82      * @param device The USB device to confirm
83      * @param accessory The USB accessory to confirm
84      */
confirmUsbHandler(@onNull ResolveInfo rInfo, @Nullable UsbDevice device, @Nullable UsbAccessory accessory)85     void confirmUsbHandler(@NonNull ResolveInfo rInfo, @Nullable UsbDevice device,
86             @Nullable UsbAccessory accessory) {
87         Intent resolverIntent = createDialogIntent();
88         // start UsbConfirmActivity if there is only one choice
89         resolverIntent.setComponent(ComponentName.unflattenFromString(
90                 mContext.getResources().getString(
91                         com.android.internal.R.string.config_usbConfirmActivity)));
92         resolverIntent.putExtra("rinfo", rInfo);
93         UserHandle user =
94                 UserHandle.getUserHandleForUid(rInfo.activityInfo.applicationInfo.uid);
95 
96         if (device != null) {
97             resolverIntent.putExtra(UsbManager.EXTRA_DEVICE, device);
98         } else {
99             resolverIntent.putExtra(UsbManager.EXTRA_ACCESSORY, accessory);
100         }
101 
102         try {
103             mContext.startActivityAsUser(resolverIntent, user);
104         } catch (ActivityNotFoundException e) {
105             Slog.e(LOG_TAG, "unable to start activity " + resolverIntent, e);
106         }
107     }
108 
109     /**
110      * Shows dialog to user to select the package to start when the USB device
111      * or accessory is attached and there are more than one package claim to handle this
112      * USB device or accessory.
113      *
114      * @param matches The available resolutions of the intent
115      * @param user The user to start UI dialog
116      * @param intent The intent to start the UI dialog
117      */
selectUsbHandler(@onNull ArrayList<ResolveInfo> matches, @NonNull UserHandle user, @NonNull Intent intent)118     void selectUsbHandler(@NonNull ArrayList<ResolveInfo> matches,
119             @NonNull UserHandle user, @NonNull Intent intent) {
120         Intent resolverIntent = createDialogIntent();
121         resolverIntent.setComponent(ComponentName.unflattenFromString(
122                 mContext.getResources().getString(
123                         com.android.internal.R.string.config_usbResolverActivity)));
124         resolverIntent.putParcelableArrayListExtra("rlist", matches);
125         resolverIntent.putExtra(Intent.EXTRA_INTENT, intent);
126 
127         try {
128             mContext.startActivityAsUser(resolverIntent, user);
129         } catch (ActivityNotFoundException e) {
130             Slog.e(LOG_TAG, "unable to start activity " + resolverIntent, e);
131         }
132     }
133 
createDialogIntent()134     private Intent createDialogIntent() {
135         Intent intent = new Intent();
136         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
137         return intent;
138     }
139 }
140