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 * The Android Bluetooth API is not finalized, and *will* change. Use at your 30 * own risk. 31 * 32 * Public API for controlling the Bluetooth Pbap Service. This includes 33 * Bluetooth Phone book Access profile. 34 * BluetoothPbap is a proxy object for controlling the Bluetooth Pbap 35 * Service via IPC. 36 * 37 * Creating a BluetoothPbap object will create a binding with the 38 * BluetoothPbap service. Users of this object should call close() when they 39 * are finished with the BluetoothPbap, so that this proxy object can unbind 40 * from the service. 41 * 42 * This BluetoothPbap object is not immediately bound to the 43 * BluetoothPbap service. Use the ServiceListener interface to obtain a 44 * notification when it is bound, this is especially important if you wish to 45 * immediately call methods on BluetoothPbap after construction. 46 * 47 * Android only supports one connected Bluetooth Pce at a time. 48 * 49 * @hide 50 */ 51 public class BluetoothPbap { 52 53 private static final String TAG = "BluetoothPbap"; 54 private static final boolean DBG = false; 55 56 /** int extra for PBAP_STATE_CHANGED_ACTION */ 57 public static final String PBAP_STATE = 58 "android.bluetooth.pbap.intent.PBAP_STATE"; 59 /** int extra for PBAP_STATE_CHANGED_ACTION */ 60 public static final String PBAP_PREVIOUS_STATE = 61 "android.bluetooth.pbap.intent.PBAP_PREVIOUS_STATE"; 62 63 /** Indicates the state of an pbap connection state has changed. 64 * This intent will always contain PBAP_STATE, PBAP_PREVIOUS_STATE and 65 * BluetoothIntent.ADDRESS extras. 66 */ 67 public static final String PBAP_STATE_CHANGED_ACTION = 68 "android.bluetooth.pbap.intent.action.PBAP_STATE_CHANGED"; 69 70 private IBluetoothPbap mService; 71 private final Context mContext; 72 private final ServiceListener mServiceListener; 73 74 /** There was an error trying to obtain the state */ 75 public static final int STATE_ERROR = -1; 76 /** No client currently connected */ 77 public static final int STATE_DISCONNECTED = 0; 78 /** Connection attempt in progress */ 79 public static final int STATE_CONNECTING = 1; 80 /** Client is currently connected */ 81 public static final int STATE_CONNECTED = 2; 82 83 public static final int RESULT_FAILURE = 0; 84 public static final int RESULT_SUCCESS = 1; 85 /** Connection canceled before completion. */ 86 public static final int RESULT_CANCELED = 2; 87 88 /** 89 * An interface for notifying Bluetooth PCE IPC clients when they have 90 * been connected to the BluetoothPbap service. 91 */ 92 public interface ServiceListener { 93 /** 94 * Called to notify the client when this proxy object has been 95 * connected to the BluetoothPbap service. Clients must wait for 96 * this callback before making IPC calls on the BluetoothPbap 97 * service. 98 */ 99 public void onServiceConnected(); 100 101 /** 102 * Called to notify the client that this proxy object has been 103 * disconnected from the BluetoothPbap service. Clients must not 104 * make IPC calls on the BluetoothPbap service after this callback. 105 * This callback will currently only occur if the application hosting 106 * the BluetoothPbap service, but may be called more often in future. 107 */ 108 public void onServiceDisconnected(); 109 } 110 111 /** 112 * Create a BluetoothPbap proxy object. 113 */ 114 public BluetoothPbap(Context context, ServiceListener l) { 115 mContext = context; 116 mServiceListener = l; 117 if (!context.bindService(new Intent(IBluetoothPbap.class.getName()), mConnection, 0)) { 118 Log.e(TAG, "Could not bind to Bluetooth Pbap Service"); 119 } 120 } 121 122 protected void finalize() throws Throwable { 123 try { 124 close(); 125 } finally { 126 super.finalize(); 127 } 128 } 129 130 /** 131 * Close the connection to the backing service. 132 * Other public functions of BluetoothPbap will return default error 133 * results once close() has been called. Multiple invocations of close() 134 * are ok. 135 */ 136 public synchronized void close() { 137 if (mConnection != null) { 138 mContext.unbindService(mConnection); 139 mConnection = null; 140 } 141 } 142 143 /** 144 * Get the current state of the BluetoothPbap service. 145 * @return One of the STATE_ return codes, or STATE_ERROR if this proxy 146 * object is currently not connected to the Pbap service. 147 */ 148 public int getState() { 149 if (DBG) log("getState()"); 150 if (mService != null) { 151 try { 152 return mService.getState(); 153 } catch (RemoteException e) {Log.e(TAG, e.toString());} 154 } else { 155 Log.w(TAG, "Proxy not attached to service"); 156 if (DBG) log(Log.getStackTraceString(new Throwable())); 157 } 158 return BluetoothPbap.STATE_ERROR; 159 } 160 161 /** 162 * Get the currently connected remote Bluetooth device (PCE). 163 * @return The remote Bluetooth device, or null if not in connected or 164 * connecting state, or if this proxy object is not connected to 165 * the Pbap service. 166 */ 167 public BluetoothDevice getClient() { 168 if (DBG) log("getClient()"); 169 if (mService != null) { 170 try { 171 return mService.getClient(); 172 } catch (RemoteException e) {Log.e(TAG, e.toString());} 173 } else { 174 Log.w(TAG, "Proxy not attached to service"); 175 if (DBG) log(Log.getStackTraceString(new Throwable())); 176 } 177 return null; 178 } 179 180 /** 181 * Returns true if the specified Bluetooth device is connected (does not 182 * include connecting). Returns false if not connected, or if this proxy 183 * object is not currently connected to the Pbap service. 184 */ 185 public boolean isConnected(BluetoothDevice device) { 186 if (DBG) log("isConnected(" + device + ")"); 187 if (mService != null) { 188 try { 189 return mService.isConnected(device); 190 } catch (RemoteException e) {Log.e(TAG, e.toString());} 191 } else { 192 Log.w(TAG, "Proxy not attached to service"); 193 if (DBG) log(Log.getStackTraceString(new Throwable())); 194 } 195 return false; 196 } 197 198 /** 199 * Disconnects the current Pbap client (PCE). Currently this call blocks, 200 * it may soon be made asynchornous. Returns false if this proxy object is 201 * not currently connected to the Pbap service. 202 */ 203 public boolean disconnect() { 204 if (DBG) log("disconnect()"); 205 if (mService != null) { 206 try { 207 mService.disconnect(); 208 return true; 209 } catch (RemoteException e) {Log.e(TAG, e.toString());} 210 } else { 211 Log.w(TAG, "Proxy not attached to service"); 212 if (DBG) log(Log.getStackTraceString(new Throwable())); 213 } 214 return false; 215 } 216 217 /** 218 * Check class bits for possible PBAP support. 219 * This is a simple heuristic that tries to guess if a device with the 220 * given class bits might support PBAP. It is not accurate for all 221 * devices. It tries to err on the side of false positives. 222 * @return True if this device might support PBAP. 223 */ 224 public static boolean doesClassMatchSink(BluetoothClass btClass) { 225 // TODO optimize the rule 226 switch (btClass.getDeviceClass()) { 227 case BluetoothClass.Device.COMPUTER_DESKTOP: 228 case BluetoothClass.Device.COMPUTER_LAPTOP: 229 case BluetoothClass.Device.COMPUTER_SERVER: 230 case BluetoothClass.Device.COMPUTER_UNCATEGORIZED: 231 return true; 232 default: 233 return false; 234 } 235 } 236 237 private ServiceConnection mConnection = new ServiceConnection() { 238 public void onServiceConnected(ComponentName className, IBinder service) { 239 if (DBG) log("Proxy object connected"); 240 mService = IBluetoothPbap.Stub.asInterface(service); 241 if (mServiceListener != null) { 242 mServiceListener.onServiceConnected(); 243 } 244 } 245 public void onServiceDisconnected(ComponentName className) { 246 if (DBG) log("Proxy object disconnected"); 247 mService = null; 248 if (mServiceListener != null) { 249 mServiceListener.onServiceDisconnected(); 250 } 251 } 252 }; 253 254 private static void log(String msg) { 255 Log.d(TAG, msg); 256 } 257 } 258
