IMountServiceListener.java revision d95d3bfb2b28a4f21f3fdcd740160c9a61eb0363 
1/*
2 * Copyright (C) 2009 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
17package android.os.storage;
18
19import android.os.Binder;
20import android.os.IBinder;
21import android.os.IInterface;
22import android.os.Parcel;
23import android.os.RemoteException;
24
25/**
26 * Callback class for receiving events from MountService.
27 *
28 * @hide - Applications should use IStorageEventListener for storage event
29 *       callbacks.
30 */
31public interface IMountServiceListener extends IInterface {
32    /** Local-side IPC implementation stub class. */
33    public static abstract class Stub extends Binder implements IMountServiceListener {
34        private static final String DESCRIPTOR = "IMountServiceListener";
35
36        /** Construct the stub at attach it to the interface. */
37        public Stub() {
38            this.attachInterface(this, DESCRIPTOR);
39        }
40
41        /**
42         * Cast an IBinder object into an IMountServiceListener interface,
43         * generating a proxy if needed.
44         */
45        public static IMountServiceListener asInterface(IBinder obj) {
46            if ((obj == null)) {
47                return null;
48            }
49            IInterface iin = (IInterface) obj.queryLocalInterface(DESCRIPTOR);
50            if (((iin != null) && (iin instanceof IMountServiceListener))) {
51                return ((IMountServiceListener) iin);
52            }
53            return new IMountServiceListener.Stub.Proxy(obj);
54        }
55
56        public IBinder asBinder() {
57            return this;
58        }
59
60        @Override
61        public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
62                throws RemoteException {
63            switch (code) {
64                case INTERFACE_TRANSACTION: {
65                    reply.writeString(DESCRIPTOR);
66                    return true;
67                }
68                case TRANSACTION_onUsbMassStorageConnectionChanged: {
69                    data.enforceInterface(DESCRIPTOR);
70                    boolean connected;
71                    connected = (0 != data.readInt());
72                    this.onUsbMassStorageConnectionChanged(connected);
73                    reply.writeNoException();
74                    return true;
75                }
76                case TRANSACTION_onStorageStateChanged: {
77                    data.enforceInterface(DESCRIPTOR);
78                    final String path = data.readString();
79                    final String oldState = data.readString();
80                    final String newState = data.readString();
81                    this.onStorageStateChanged(path, oldState, newState);
82                    reply.writeNoException();
83                    return true;
84                }
85                case TRANSACTION_onVolumeStateChanged: {
86                    data.enforceInterface(DESCRIPTOR);
87                    final VolumeInfo vol = (VolumeInfo) data.readParcelable(null);
88                    final int oldState = data.readInt();
89                    final int newState = data.readInt();
90                    onVolumeStateChanged(vol, oldState, newState);
91                    reply.writeNoException();
92                    return true;
93                }
94                case TRANSACTION_onVolumeMetadataChanged: {
95                    data.enforceInterface(DESCRIPTOR);
96                    final VolumeInfo vol = (VolumeInfo) data.readParcelable(null);
97                    onVolumeMetadataChanged(vol);
98                    reply.writeNoException();
99                    return true;
100                }
101            }
102            return super.onTransact(code, data, reply, flags);
103        }
104
105        private static class Proxy implements IMountServiceListener {
106            private IBinder mRemote;
107
108            Proxy(IBinder remote) {
109                mRemote = remote;
110            }
111
112            public IBinder asBinder() {
113                return mRemote;
114            }
115
116            public String getInterfaceDescriptor() {
117                return DESCRIPTOR;
118            }
119
120            /**
121             * Detection state of USB Mass Storage has changed
122             *
123             * @param available true if a UMS host is connected.
124             */
125            public void onUsbMassStorageConnectionChanged(boolean connected) throws RemoteException {
126                Parcel _data = Parcel.obtain();
127                Parcel _reply = Parcel.obtain();
128                try {
129                    _data.writeInterfaceToken(DESCRIPTOR);
130                    _data.writeInt(((connected) ? (1) : (0)));
131                    mRemote.transact(Stub.TRANSACTION_onUsbMassStorageConnectionChanged, _data,
132                            _reply, android.os.IBinder.FLAG_ONEWAY);
133                    _reply.readException();
134                } finally {
135                    _reply.recycle();
136                    _data.recycle();
137                }
138            }
139
140            /**
141             * Storage state has changed.
142             *
143             * @param path The volume mount path.
144             * @param oldState The old state of the volume.
145             * @param newState The new state of the volume. Note: State is one
146             *            of the values returned by
147             *            Environment.getExternalStorageState()
148             */
149            public void onStorageStateChanged(String path, String oldState, String newState)
150                    throws RemoteException {
151                Parcel _data = Parcel.obtain();
152                Parcel _reply = Parcel.obtain();
153                try {
154                    _data.writeInterfaceToken(DESCRIPTOR);
155                    _data.writeString(path);
156                    _data.writeString(oldState);
157                    _data.writeString(newState);
158                    mRemote.transact(Stub.TRANSACTION_onStorageStateChanged, _data, _reply,
159                            android.os.IBinder.FLAG_ONEWAY);
160                    _reply.readException();
161                } finally {
162                    _reply.recycle();
163                    _data.recycle();
164                }
165            }
166
167            @Override
168            public void onVolumeStateChanged(VolumeInfo vol, int oldState, int newState)
169                    throws RemoteException {
170                Parcel _data = Parcel.obtain();
171                Parcel _reply = Parcel.obtain();
172                try {
173                    _data.writeInterfaceToken(DESCRIPTOR);
174                    _data.writeParcelable(vol, 0);
175                    _data.writeInt(oldState);
176                    _data.writeInt(newState);
177                    mRemote.transact(Stub.TRANSACTION_onVolumeStateChanged, _data, _reply,
178                            android.os.IBinder.FLAG_ONEWAY);
179                    _reply.readException();
180                } finally {
181                    _reply.recycle();
182                    _data.recycle();
183                }
184            }
185
186            @Override
187            public void onVolumeMetadataChanged(VolumeInfo vol) throws RemoteException {
188                Parcel _data = Parcel.obtain();
189                Parcel _reply = Parcel.obtain();
190                try {
191                    _data.writeInterfaceToken(DESCRIPTOR);
192                    _data.writeParcelable(vol, 0);
193                    mRemote.transact(Stub.TRANSACTION_onVolumeMetadataChanged, _data, _reply,
194                            android.os.IBinder.FLAG_ONEWAY);
195                    _reply.readException();
196                } finally {
197                    _reply.recycle();
198                    _data.recycle();
199                }
200            }
201        }
202
203        static final int TRANSACTION_onUsbMassStorageConnectionChanged = (IBinder.FIRST_CALL_TRANSACTION + 0);
204
205        static final int TRANSACTION_onStorageStateChanged = (IBinder.FIRST_CALL_TRANSACTION + 1);
206
207        static final int TRANSACTION_onVolumeStateChanged = (IBinder.FIRST_CALL_TRANSACTION + 2);
208        static final int TRANSACTION_onVolumeMetadataChanged = (IBinder.FIRST_CALL_TRANSACTION + 3);
209    }
210
211    /**
212     * Detection state of USB Mass Storage has changed
213     *
214     * @param available true if a UMS host is connected.
215     */
216    public void onUsbMassStorageConnectionChanged(boolean connected) throws RemoteException;
217
218    /**
219     * Storage state has changed.
220     *
221     * @param path The volume mount path.
222     * @param oldState The old state of the volume.
223     * @param newState The new state of the volume. Note: State is one of the
224     *            values returned by Environment.getExternalStorageState()
225     */
226    public void onStorageStateChanged(String path, String oldState, String newState)
227            throws RemoteException;
228
229    public void onVolumeStateChanged(VolumeInfo vol, int oldState, int newState)
230            throws RemoteException;
231
232    public void onVolumeMetadataChanged(VolumeInfo vol) throws RemoteException;
233}
234