Matthew Xie | fe3807a | 2013-07-18 17:31:50 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2008 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.bluetooth; |
| 18 | |
| 19 | import android.content.ComponentName; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.ServiceConnection; |
| 23 | import android.os.RemoteException; |
| 24 | import android.os.IBinder; |
| 25 | import android.os.ServiceManager; |
| 26 | import android.util.Log; |
| 27 | |
| 28 | /** |
| 29 | * This class provides the APIs to control the Bluetooth MAP |
| 30 | * Profile. |
| 31 | *@hide |
| 32 | */ |
| 33 | public class BluetoothMap { |
| 34 | |
| 35 | private static final String TAG = "BluetoothMap"; |
| 36 | private static final boolean DBG = true; |
| 37 | private static final boolean VDBG = false; |
| 38 | |
| 39 | /** int extra for MAP_STATE_CHANGED_ACTION */ |
| 40 | public static final String MAP_STATE = |
| 41 | "android.bluetooth.map.intent.MAP_STATE"; |
| 42 | /** int extra for MAP_STATE_CHANGED_ACTION */ |
| 43 | public static final String MAP_PREVIOUS_STATE = |
| 44 | "android.bluetooth.map.intent.MAP_PREVIOUS_STATE"; |
| 45 | |
| 46 | /** Indicates the state of a Map connection state has changed. |
| 47 | * This intent will always contain MAP_STATE, MAP_PREVIOUS_STATE and |
| 48 | * BluetoothIntent.ADDRESS extras. |
| 49 | */ |
| 50 | public static final String MAP_STATE_CHANGED_ACTION = |
| 51 | "android.bluetooth.map.intent.action.MAP_STATE_CHANGED"; |
| 52 | |
| 53 | private IBluetoothMap mService; |
| 54 | private final Context mContext; |
| 55 | private ServiceListener mServiceListener; |
| 56 | private BluetoothAdapter mAdapter; |
| 57 | |
| 58 | /** There was an error trying to obtain the state */ |
| 59 | public static final int STATE_ERROR = -1; |
| 60 | /** No client currently connected */ |
| 61 | public static final int STATE_DISCONNECTED = 0; |
| 62 | /** Connection attempt in progress */ |
| 63 | public static final int STATE_CONNECTING = 1; |
| 64 | /** Client is currently connected */ |
| 65 | public static final int STATE_CONNECTED = 2; |
| 66 | |
| 67 | public static final int RESULT_FAILURE = 0; |
| 68 | public static final int RESULT_SUCCESS = 1; |
| 69 | /** Connection canceled before completion. */ |
| 70 | public static final int RESULT_CANCELED = 2; |
| 71 | |
| 72 | /** |
| 73 | * An interface for notifying Bluetooth PCE IPC clients when they have |
| 74 | * been connected to the BluetoothMap service. |
| 75 | */ |
| 76 | public interface ServiceListener { |
| 77 | /** |
| 78 | * Called to notify the client when this proxy object has been |
| 79 | * connected to the BluetoothMap service. Clients must wait for |
| 80 | * this callback before making IPC calls on the BluetoothMap |
| 81 | * service. |
| 82 | */ |
| 83 | public void onServiceConnected(BluetoothMap proxy); |
| 84 | |
| 85 | /** |
| 86 | * Called to notify the client that this proxy object has been |
| 87 | * disconnected from the BluetoothMap service. Clients must not |
| 88 | * make IPC calls on the BluetoothMap service after this callback. |
| 89 | * This callback will currently only occur if the application hosting |
| 90 | * the BluetoothMap service, but may be called more often in future. |
| 91 | */ |
| 92 | public void onServiceDisconnected(); |
| 93 | } |
| 94 | |
| 95 | final private IBluetoothStateChangeCallback mBluetoothStateChangeCallback = |
| 96 | new IBluetoothStateChangeCallback.Stub() { |
| 97 | public void onBluetoothStateChange(boolean up) { |
| 98 | if (DBG) Log.d(TAG, "onBluetoothStateChange: up=" + up); |
| 99 | if (!up) { |
| 100 | if (VDBG) Log.d(TAG,"Unbinding service..."); |
| 101 | synchronized (mConnection) { |
| 102 | try { |
| 103 | mService = null; |
| 104 | mContext.unbindService(mConnection); |
| 105 | } catch (Exception re) { |
| 106 | Log.e(TAG,"",re); |
| 107 | } |
| 108 | } |
| 109 | } else { |
| 110 | synchronized (mConnection) { |
| 111 | try { |
| 112 | if (mService == null) { |
| 113 | if (VDBG) Log.d(TAG,"Binding service..."); |
| 114 | if (!mContext.bindService( |
| 115 | new Intent(IBluetoothMap.class.getName()), |
| 116 | mConnection, 0)) { |
| 117 | Log.e(TAG, "Could not bind to Bluetooth MAP Service"); |
| 118 | } |
| 119 | } |
| 120 | } catch (Exception re) { |
| 121 | Log.e(TAG,"",re); |
| 122 | } |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | }; |
| 127 | |
| 128 | /** |
| 129 | * Create a BluetoothMap proxy object. |
| 130 | */ |
| 131 | public BluetoothMap(Context context, ServiceListener l) { |
| 132 | mContext = context; |
| 133 | mServiceListener = l; |
| 134 | mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| 135 | IBluetoothManager mgr = mAdapter.getBluetoothManager(); |
| 136 | if (mgr != null) { |
| 137 | try { |
| 138 | mgr.registerStateChangeCallback(mBluetoothStateChangeCallback); |
| 139 | } catch (RemoteException e) { |
| 140 | Log.e(TAG,"",e); |
| 141 | } |
| 142 | } |
| 143 | if (!context.bindService(new Intent(IBluetoothMap.class.getName()), mConnection, 0)) { |
| 144 | Log.e(TAG, "Could not bind to Bluetooth Map Service"); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | protected void finalize() throws Throwable { |
| 149 | try { |
| 150 | close(); |
| 151 | } finally { |
| 152 | super.finalize(); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Close the connection to the backing service. |
| 158 | * Other public functions of BluetoothMap will return default error |
| 159 | * results once close() has been called. Multiple invocations of close() |
| 160 | * are ok. |
| 161 | */ |
| 162 | public synchronized void close() { |
| 163 | IBluetoothManager mgr = mAdapter.getBluetoothManager(); |
| 164 | if (mgr != null) { |
| 165 | try { |
| 166 | mgr.unregisterStateChangeCallback(mBluetoothStateChangeCallback); |
| 167 | } catch (Exception e) { |
| 168 | Log.e(TAG,"",e); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | synchronized (mConnection) { |
| 173 | if (mService != null) { |
| 174 | try { |
| 175 | mService = null; |
| 176 | mContext.unbindService(mConnection); |
| 177 | mConnection = null; |
| 178 | } catch (Exception re) { |
| 179 | Log.e(TAG,"",re); |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | mServiceListener = null; |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * Get the current state of the BluetoothMap service. |
| 188 | * @return One of the STATE_ return codes, or STATE_ERROR if this proxy |
| 189 | * object is currently not connected to the Map service. |
| 190 | */ |
| 191 | public int getState() { |
| 192 | if (VDBG) log("getState()"); |
| 193 | if (mService != null) { |
| 194 | try { |
| 195 | return mService.getState(); |
| 196 | } catch (RemoteException e) {Log.e(TAG, e.toString());} |
| 197 | } else { |
| 198 | Log.w(TAG, "Proxy not attached to service"); |
| 199 | if (DBG) log(Log.getStackTraceString(new Throwable())); |
| 200 | } |
| 201 | return BluetoothMap.STATE_ERROR; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * Get the currently connected remote Bluetooth device (PCE). |
| 206 | * @return The remote Bluetooth device, or null if not in connected or |
| 207 | * connecting state, or if this proxy object is not connected to |
| 208 | * the Map service. |
| 209 | */ |
| 210 | public BluetoothDevice getClient() { |
| 211 | if (VDBG) log("getClient()"); |
| 212 | if (mService != null) { |
| 213 | try { |
| 214 | return mService.getClient(); |
| 215 | } catch (RemoteException e) {Log.e(TAG, e.toString());} |
| 216 | } else { |
| 217 | Log.w(TAG, "Proxy not attached to service"); |
| 218 | if (DBG) log(Log.getStackTraceString(new Throwable())); |
| 219 | } |
| 220 | return null; |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Returns true if the specified Bluetooth device is connected (does not |
| 225 | * include connecting). Returns false if not connected, or if this proxy |
| 226 | * object is not currently connected to the Map service. |
| 227 | */ |
| 228 | public boolean isConnected(BluetoothDevice device) { |
| 229 | if (VDBG) log("isConnected(" + device + ")"); |
| 230 | if (mService != null) { |
| 231 | try { |
| 232 | return mService.isConnected(device); |
| 233 | } catch (RemoteException e) {Log.e(TAG, e.toString());} |
| 234 | } else { |
| 235 | Log.w(TAG, "Proxy not attached to service"); |
| 236 | if (DBG) log(Log.getStackTraceString(new Throwable())); |
| 237 | } |
| 238 | return false; |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * Disconnects the current Map Client. Currently this call blocks, |
| 243 | * it may soon be made asynchronous. Returns false if this proxy object is |
| 244 | * not currently connected to the Map service. |
| 245 | */ |
| 246 | public boolean disconnect() { |
| 247 | if (DBG) log("disconnect()"); |
| 248 | if (mService != null) { |
| 249 | try { |
| 250 | mService.disconnect(); |
| 251 | return true; |
| 252 | } catch (RemoteException e) {Log.e(TAG, e.toString());} |
| 253 | } else { |
| 254 | Log.w(TAG, "Proxy not attached to service"); |
| 255 | if (DBG) log(Log.getStackTraceString(new Throwable())); |
| 256 | } |
| 257 | return false; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Check class bits for possible Map support. |
| 262 | * This is a simple heuristic that tries to guess if a device with the |
| 263 | * given class bits might support Map. It is not accurate for all |
| 264 | * devices. It tries to err on the side of false positives. |
| 265 | * @return True if this device might support Map. |
| 266 | */ |
| 267 | public static boolean doesClassMatchSink(BluetoothClass btClass) { |
| 268 | // TODO optimize the rule |
| 269 | switch (btClass.getDeviceClass()) { |
| 270 | case BluetoothClass.Device.COMPUTER_DESKTOP: |
| 271 | case BluetoothClass.Device.COMPUTER_LAPTOP: |
| 272 | case BluetoothClass.Device.COMPUTER_SERVER: |
| 273 | case BluetoothClass.Device.COMPUTER_UNCATEGORIZED: |
| 274 | return true; |
| 275 | default: |
| 276 | return false; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | private ServiceConnection mConnection = new ServiceConnection() { |
| 281 | public void onServiceConnected(ComponentName className, IBinder service) { |
| 282 | if (DBG) log("Proxy object connected"); |
| 283 | mService = IBluetoothMap.Stub.asInterface(service); |
| 284 | if (mServiceListener != null) { |
| 285 | mServiceListener.onServiceConnected(BluetoothMap.this); |
| 286 | } |
| 287 | } |
| 288 | public void onServiceDisconnected(ComponentName className) { |
| 289 | if (DBG) log("Proxy object disconnected"); |
| 290 | mService = null; |
| 291 | if (mServiceListener != null) { |
| 292 | mServiceListener.onServiceDisconnected(); |
| 293 | } |
| 294 | } |
| 295 | }; |
| 296 | |
| 297 | private static void log(String msg) { |
| 298 | Log.d(TAG, msg); |
| 299 | } |
| 300 | } |