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 17 package android.os.storage; 18 19 import android.os.Binder; 20 import android.os.IBinder; 21 import android.os.IInterface; 22 import android.os.Parcel; 23 import 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 */ 31 public 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. */ Stub()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 */ asInterface(IBinder obj)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 asBinder()56 public IBinder asBinder() { 57 return this; 58 } 59 60 @Override onTransact(int code, Parcel data, Parcel reply, int flags)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_onVolumeRecordChanged: { 95 data.enforceInterface(DESCRIPTOR); 96 final VolumeRecord rec = (VolumeRecord) data.readParcelable(null); 97 onVolumeRecordChanged(rec); 98 reply.writeNoException(); 99 return true; 100 } 101 case TRANSACTION_onVolumeForgotten: { 102 data.enforceInterface(DESCRIPTOR); 103 final String fsUuid = data.readString(); 104 onVolumeForgotten(fsUuid); 105 reply.writeNoException(); 106 return true; 107 } 108 case TRANSACTION_onDiskScanned: { 109 data.enforceInterface(DESCRIPTOR); 110 final DiskInfo disk = (DiskInfo) data.readParcelable(null); 111 final int volumeCount = data.readInt(); 112 onDiskScanned(disk, volumeCount); 113 reply.writeNoException(); 114 return true; 115 } 116 case TRANSACTION_onDiskDestroyed: { 117 data.enforceInterface(DESCRIPTOR); 118 final DiskInfo disk = (DiskInfo) data.readParcelable(null); 119 onDiskDestroyed(disk); 120 reply.writeNoException(); 121 return true; 122 } 123 } 124 return super.onTransact(code, data, reply, flags); 125 } 126 127 private static class Proxy implements IMountServiceListener { 128 private IBinder mRemote; 129 Proxy(IBinder remote)130 Proxy(IBinder remote) { 131 mRemote = remote; 132 } 133 asBinder()134 public IBinder asBinder() { 135 return mRemote; 136 } 137 getInterfaceDescriptor()138 public String getInterfaceDescriptor() { 139 return DESCRIPTOR; 140 } 141 142 /** 143 * Detection state of USB Mass Storage has changed 144 * 145 * @param available true if a UMS host is connected. 146 */ onUsbMassStorageConnectionChanged(boolean connected)147 public void onUsbMassStorageConnectionChanged(boolean connected) throws RemoteException { 148 Parcel _data = Parcel.obtain(); 149 Parcel _reply = Parcel.obtain(); 150 try { 151 _data.writeInterfaceToken(DESCRIPTOR); 152 _data.writeInt(((connected) ? (1) : (0))); 153 mRemote.transact(Stub.TRANSACTION_onUsbMassStorageConnectionChanged, _data, 154 _reply, android.os.IBinder.FLAG_ONEWAY); 155 _reply.readException(); 156 } finally { 157 _reply.recycle(); 158 _data.recycle(); 159 } 160 } 161 162 /** 163 * Storage state has changed. 164 * 165 * @param path The volume mount path. 166 * @param oldState The old state of the volume. 167 * @param newState The new state of the volume. Note: State is one 168 * of the values returned by 169 * Environment.getExternalStorageState() 170 */ onStorageStateChanged(String path, String oldState, String newState)171 public void onStorageStateChanged(String path, String oldState, String newState) 172 throws RemoteException { 173 Parcel _data = Parcel.obtain(); 174 Parcel _reply = Parcel.obtain(); 175 try { 176 _data.writeInterfaceToken(DESCRIPTOR); 177 _data.writeString(path); 178 _data.writeString(oldState); 179 _data.writeString(newState); 180 mRemote.transact(Stub.TRANSACTION_onStorageStateChanged, _data, _reply, 181 android.os.IBinder.FLAG_ONEWAY); 182 _reply.readException(); 183 } finally { 184 _reply.recycle(); 185 _data.recycle(); 186 } 187 } 188 189 @Override onVolumeStateChanged(VolumeInfo vol, int oldState, int newState)190 public void onVolumeStateChanged(VolumeInfo vol, int oldState, int newState) 191 throws RemoteException { 192 Parcel _data = Parcel.obtain(); 193 Parcel _reply = Parcel.obtain(); 194 try { 195 _data.writeInterfaceToken(DESCRIPTOR); 196 _data.writeParcelable(vol, 0); 197 _data.writeInt(oldState); 198 _data.writeInt(newState); 199 mRemote.transact(Stub.TRANSACTION_onVolumeStateChanged, _data, _reply, 200 android.os.IBinder.FLAG_ONEWAY); 201 _reply.readException(); 202 } finally { 203 _reply.recycle(); 204 _data.recycle(); 205 } 206 } 207 208 @Override onVolumeRecordChanged(VolumeRecord rec)209 public void onVolumeRecordChanged(VolumeRecord rec) throws RemoteException { 210 Parcel _data = Parcel.obtain(); 211 Parcel _reply = Parcel.obtain(); 212 try { 213 _data.writeInterfaceToken(DESCRIPTOR); 214 _data.writeParcelable(rec, 0); 215 mRemote.transact(Stub.TRANSACTION_onVolumeRecordChanged, _data, _reply, 216 android.os.IBinder.FLAG_ONEWAY); 217 _reply.readException(); 218 } finally { 219 _reply.recycle(); 220 _data.recycle(); 221 } 222 } 223 224 @Override onVolumeForgotten(String fsUuid)225 public void onVolumeForgotten(String fsUuid) throws RemoteException { 226 Parcel _data = Parcel.obtain(); 227 Parcel _reply = Parcel.obtain(); 228 try { 229 _data.writeInterfaceToken(DESCRIPTOR); 230 _data.writeString(fsUuid); 231 mRemote.transact(Stub.TRANSACTION_onVolumeForgotten, _data, _reply, 232 android.os.IBinder.FLAG_ONEWAY); 233 _reply.readException(); 234 } finally { 235 _reply.recycle(); 236 _data.recycle(); 237 } 238 } 239 240 @Override onDiskScanned(DiskInfo disk, int volumeCount)241 public void onDiskScanned(DiskInfo disk, int volumeCount) throws RemoteException { 242 Parcel _data = Parcel.obtain(); 243 Parcel _reply = Parcel.obtain(); 244 try { 245 _data.writeInterfaceToken(DESCRIPTOR); 246 _data.writeParcelable(disk, 0); 247 _data.writeInt(volumeCount); 248 mRemote.transact(Stub.TRANSACTION_onDiskScanned, _data, _reply, 249 android.os.IBinder.FLAG_ONEWAY); 250 _reply.readException(); 251 } finally { 252 _reply.recycle(); 253 _data.recycle(); 254 } 255 } 256 257 @Override onDiskDestroyed(DiskInfo disk)258 public void onDiskDestroyed(DiskInfo disk) throws RemoteException { 259 Parcel _data = Parcel.obtain(); 260 Parcel _reply = Parcel.obtain(); 261 try { 262 _data.writeInterfaceToken(DESCRIPTOR); 263 _data.writeParcelable(disk, 0); 264 mRemote.transact(Stub.TRANSACTION_onDiskDestroyed, _data, _reply, 265 android.os.IBinder.FLAG_ONEWAY); 266 _reply.readException(); 267 } finally { 268 _reply.recycle(); 269 _data.recycle(); 270 } 271 } 272 } 273 274 static final int TRANSACTION_onUsbMassStorageConnectionChanged = (IBinder.FIRST_CALL_TRANSACTION + 0); 275 static final int TRANSACTION_onStorageStateChanged = (IBinder.FIRST_CALL_TRANSACTION + 1); 276 static final int TRANSACTION_onVolumeStateChanged = (IBinder.FIRST_CALL_TRANSACTION + 2); 277 static final int TRANSACTION_onVolumeRecordChanged = (IBinder.FIRST_CALL_TRANSACTION + 3); 278 static final int TRANSACTION_onVolumeForgotten = (IBinder.FIRST_CALL_TRANSACTION + 4); 279 static final int TRANSACTION_onDiskScanned = (IBinder.FIRST_CALL_TRANSACTION + 5); 280 static final int TRANSACTION_onDiskDestroyed = (IBinder.FIRST_CALL_TRANSACTION + 6); 281 } 282 283 /** 284 * Detection state of USB Mass Storage has changed 285 * 286 * @param available true if a UMS host is connected. 287 */ onUsbMassStorageConnectionChanged(boolean connected)288 public void onUsbMassStorageConnectionChanged(boolean connected) throws RemoteException; 289 290 /** 291 * Storage state has changed. 292 * 293 * @param path The volume mount path. 294 * @param oldState The old state of the volume. 295 * @param newState The new state of the volume. Note: State is one of the 296 * values returned by Environment.getExternalStorageState() 297 */ onStorageStateChanged(String path, String oldState, String newState)298 public void onStorageStateChanged(String path, String oldState, String newState) 299 throws RemoteException; 300 onVolumeStateChanged(VolumeInfo vol, int oldState, int newState)301 public void onVolumeStateChanged(VolumeInfo vol, int oldState, int newState) 302 throws RemoteException; onVolumeRecordChanged(VolumeRecord rec)303 public void onVolumeRecordChanged(VolumeRecord rec) throws RemoteException; onVolumeForgotten(String fsUuid)304 public void onVolumeForgotten(String fsUuid) throws RemoteException; 305 onDiskScanned(DiskInfo disk, int volumeCount)306 public void onDiskScanned(DiskInfo disk, int volumeCount) throws RemoteException; 307 onDiskDestroyed(DiskInfo disk)308 public void onDiskDestroyed(DiskInfo disk) throws RemoteException; 309 } 310