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1 /*
2  * Copyright (C) 2013 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.cts.verifier.bluetooth;
18 
19 import java.util.UUID;
20 import java.util.List;
21 
22 import android.app.Service;
23 import android.bluetooth.BluetoothAdapter;
24 import android.bluetooth.BluetoothDevice;
25 import android.bluetooth.BluetoothGatt;
26 import android.bluetooth.BluetoothGattCallback;
27 import android.bluetooth.BluetoothGattCharacteristic;
28 import android.bluetooth.BluetoothGattDescriptor;
29 import android.bluetooth.BluetoothGattService;
30 import android.bluetooth.BluetoothManager;
31 import android.bluetooth.BluetoothProfile;
32 import android.content.Context;
33 import android.content.Intent;
34 import android.os.Handler;
35 import android.os.IBinder;
36 import android.util.Log;
37 import android.widget.Toast;
38 
39 public class BleClientService extends Service {
40 
41     public static final boolean DEBUG = true;
42     public static final String TAG = "BleClientService";
43 
44     public static final int COMMAND_CONNECT = 0;
45     public static final int COMMAND_DISCONNECT = 1;
46     public static final int COMMAND_DISCOVER_SERVICE = 2;
47     public static final int COMMAND_READ_RSSI = 3;
48     public static final int COMMAND_WRITE_CHARACTERISTIC = 4;
49     public static final int COMMAND_READ_CHARACTERISTIC = 5;
50     public static final int COMMAND_WRITE_DESCRIPTOR = 6;
51     public static final int COMMAND_READ_DESCRIPTOR = 7;
52     public static final int COMMAND_SET_NOTIFICATION = 8;
53     public static final int COMMAND_BEGIN_WRITE = 9;
54     public static final int COMMAND_EXECUTE_WRITE = 10;
55     public static final int COMMAND_ABORT_RELIABLE = 11;
56 
57     public static final String BLE_BLUETOOTH_CONNECTED =
58             "com.android.cts.verifier.bluetooth.BLE_BLUETOOTH_CONNECTED";
59     public static final String BLE_BLUETOOTH_DISCONNECTED =
60             "com.android.cts.verifier.bluetooth.BLE_BLUETOOTH_DISCONNECTED";
61     public static final String BLE_SERVICES_DISCOVERED =
62             "com.android.cts.verifier.bluetooth.BLE_SERVICES_DISCOVERED";
63     public static final String BLE_CHARACTERISTIC_READ =
64             "com.android.cts.verifier.bluetooth.BLE_CHARACTERISTIC_READ";
65     public static final String BLE_CHARACTERISTIC_WRITE =
66             "com.android.cts.verifier.bluetooth.BLE_CHARACTERISTIC_WRITE";
67     public static final String BLE_CHARACTERISTIC_CHANGED =
68             "com.android.cts.verifier.bluetooth.BLE_CHARACTERISTIC_CHANGED";
69     public static final String BLE_DESCRIPTOR_READ =
70             "com.android.cts.verifier.bluetooth.BLE_DESCRIPTOR_READ";
71     public static final String BLE_DESCRIPTOR_WRITE =
72             "com.android.cts.verifier.bluetooth.BLE_DESCRIPTOR_WRITE";
73     public static final String BLE_RELIABLE_WRITE_COMPLETED =
74             "com.android.cts.verifier.bluetooth.BLE_RELIABLE_WRITE_COMPLETED";
75     public static final String BLE_READ_REMOTE_RSSI =
76             "com.android.cts.verifier.bluetooth.BLE_READ_REMOTE_RSSI";
77 
78     public static final String EXTRA_COMMAND =
79             "com.android.cts.verifier.bluetooth.EXTRA_COMMAND";
80     public static final String EXTRA_WRITE_VALUE =
81             "com.android.cts.verifier.bluetooth.EXTRA_WRITE_VALUE";
82     public static final String EXTRA_BOOL =
83             "com.android.cts.verifier.bluetooth.EXTRA_BOOL";
84     public static final String EXTRA_CHARACTERISTIC_VALUE =
85             "com.android.cts.verifier.bluetooth.EXTRA_CHARACTERISTIC_VALUE";
86     public static final String EXTRA_DESCRIPTOR_VALUE =
87             "com.android.cts.verifier.bluetooth.EXTRA_DESCRIPTOR_VALUE";
88     public static final String EXTRA_RSSI_VALUE =
89             "com.android.cts.verifier.bluetooth.EXTRA_RSSI_VALUE";
90 
91     private static final UUID SERVICE_UUID =
92             UUID.fromString("00009999-0000-1000-8000-00805f9b34fb");
93     private static final UUID CHARACTERISTIC_UUID =
94             UUID.fromString("00009998-0000-1000-8000-00805f9b34fb");
95     private static final UUID UPDATE_CHARACTERISTIC_UUID =
96             UUID.fromString("00009997-0000-1000-8000-00805f9b34fb");
97     private static final UUID DESCRIPTOR_UUID =
98             UUID.fromString("00009996-0000-1000-8000-00805f9b34fb");
99 
100     private BluetoothManager mBluetoothManager;
101     private BluetoothAdapter mBluetoothAdapter;
102     private BluetoothDevice mDevice;
103     private BluetoothGatt mBluetoothGatt;
104     private Handler mHandler;
105 
106     @Override
onCreate()107     public void onCreate() {
108         super.onCreate();
109 
110         mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
111         mBluetoothAdapter = mBluetoothManager.getAdapter();
112         mHandler = new Handler();
113     }
114 
115     @Override
onStartCommand(Intent intent, int flags, int startId)116     public int onStartCommand(Intent intent, int flags, int startId) {
117         if (intent != null) handleIntent(intent);
118         return START_NOT_STICKY;
119     }
120 
121     @Override
onBind(Intent intent)122     public IBinder onBind(Intent intent) {
123         return null;
124     }
125 
126     @Override
onDestroy()127     public void onDestroy() {
128         super.onDestroy();
129         mBluetoothGatt.disconnect();
130         mBluetoothGatt.close();
131     }
132 
handleIntent(Intent intent)133     private void handleIntent(Intent intent) {
134         int command = intent.getIntExtra(EXTRA_COMMAND, -1);
135         String address = intent.getStringExtra(BluetoothDevice.EXTRA_DEVICE); // sometimes null
136         String writeValue = intent.getStringExtra(EXTRA_WRITE_VALUE); // sometimes null
137         boolean enable = intent.getBooleanExtra(EXTRA_BOOL, false);
138         BluetoothGattService service;
139         BluetoothGattCharacteristic characteristic;
140         BluetoothGattDescriptor descriptor;
141 
142         switch (command) {
143             case COMMAND_CONNECT:
144                 mDevice = mBluetoothAdapter.getRemoteDevice(address);
145                 mBluetoothGatt = mDevice.connectGatt(this, false, mGattCallbacks);
146                 break;
147             case COMMAND_DISCONNECT:
148                 if (mBluetoothGatt != null) mBluetoothGatt.disconnect();
149                 break;
150             case COMMAND_DISCOVER_SERVICE:
151                 if (mBluetoothGatt != null) mBluetoothGatt.discoverServices();
152                 break;
153             case COMMAND_READ_RSSI:
154                 if (mBluetoothGatt != null) mBluetoothGatt.readRemoteRssi();
155                 break;
156             case COMMAND_WRITE_CHARACTERISTIC:
157                 writeCharacteristic(writeValue);
158                 break;
159             case COMMAND_READ_CHARACTERISTIC:
160                 readCharacteristic();
161                 break;
162             case COMMAND_WRITE_DESCRIPTOR:
163                 writeDescriptor(writeValue);
164                 break;
165             case COMMAND_READ_DESCRIPTOR:
166                 readDescriptor();
167                 break;
168             case COMMAND_SET_NOTIFICATION:
169                 setNotification(enable);
170                 break;
171             case COMMAND_BEGIN_WRITE:
172                 if (mBluetoothGatt != null) mBluetoothGatt.beginReliableWrite();
173                 break;
174             case COMMAND_EXECUTE_WRITE:
175                 if (mBluetoothGatt != null) mBluetoothGatt.executeReliableWrite();
176                 break;
177             case COMMAND_ABORT_RELIABLE:
178                 if (mBluetoothGatt != null) mBluetoothGatt.abortReliableWrite(mDevice);
179                 break;
180             default:
181                 showMessage("Unrecognized command: " + command);
182                 break;
183         }
184     }
185 
writeCharacteristic(String writeValue)186     private void writeCharacteristic(String writeValue) {
187         BluetoothGattCharacteristic characteristic = getCharacteristic(CHARACTERISTIC_UUID);
188         if (characteristic == null) return;
189         characteristic.setValue(writeValue);
190         mBluetoothGatt.writeCharacteristic(characteristic);
191     }
192 
readCharacteristic()193     private void readCharacteristic() {
194         BluetoothGattCharacteristic characteristic = getCharacteristic(CHARACTERISTIC_UUID);
195         if (characteristic != null) mBluetoothGatt.readCharacteristic(characteristic);
196     }
197 
writeDescriptor(String writeValue)198     private void writeDescriptor(String writeValue) {
199         BluetoothGattDescriptor descriptor = getDescriptor();
200         if (descriptor == null) return;
201         descriptor.setValue(writeValue.getBytes());
202         mBluetoothGatt.writeDescriptor(descriptor);
203     }
204 
readDescriptor()205     private void readDescriptor() {
206         BluetoothGattDescriptor descriptor = getDescriptor();
207         if (descriptor != null) mBluetoothGatt.readDescriptor(descriptor);
208     }
209 
setNotification(boolean enable)210     private void setNotification(boolean enable) {
211         BluetoothGattCharacteristic characteristic = getCharacteristic(UPDATE_CHARACTERISTIC_UUID);
212         if (characteristic != null)
213             mBluetoothGatt.setCharacteristicNotification(characteristic, enable);
214     }
215 
notifyConnected()216     private void notifyConnected() {
217         Intent intent = new Intent(BLE_BLUETOOTH_CONNECTED);
218         sendBroadcast(intent);
219     }
220 
notifyDisconnected()221     private void notifyDisconnected() {
222         Intent intent = new Intent(BLE_BLUETOOTH_DISCONNECTED);
223         sendBroadcast(intent);
224     }
225 
notifyServicesDiscovered()226     private void notifyServicesDiscovered() {
227         Intent intent = new Intent(BLE_SERVICES_DISCOVERED);
228         sendBroadcast(intent);
229     }
230 
notifyCharacteristicRead(String value)231     private void notifyCharacteristicRead(String value) {
232         Intent intent = new Intent(BLE_CHARACTERISTIC_READ);
233         intent.putExtra(EXTRA_CHARACTERISTIC_VALUE, value);
234         sendBroadcast(intent);
235     }
236 
notifyCharacteristicWrite()237     private void notifyCharacteristicWrite() {
238         Intent intent = new Intent(BLE_CHARACTERISTIC_WRITE);
239         sendBroadcast(intent);
240     }
241 
notifyCharacteristicChanged(String value)242     private void notifyCharacteristicChanged(String value) {
243         Intent intent = new Intent(BLE_CHARACTERISTIC_CHANGED);
244         intent.putExtra(EXTRA_CHARACTERISTIC_VALUE, value);
245         sendBroadcast(intent);
246     }
247 
notifyDescriptorRead(String value)248     private void notifyDescriptorRead(String value) {
249         Intent intent = new Intent(BLE_DESCRIPTOR_READ);
250         intent.putExtra(EXTRA_DESCRIPTOR_VALUE, value);
251         sendBroadcast(intent);
252     }
253 
notifyDescriptorWrite()254     private void notifyDescriptorWrite() {
255         Intent intent = new Intent(BLE_DESCRIPTOR_WRITE);
256         sendBroadcast(intent);
257     }
258 
notifyReliableWriteCompleted()259     private void notifyReliableWriteCompleted() {
260         Intent intent = new Intent(BLE_RELIABLE_WRITE_COMPLETED);
261         sendBroadcast(intent);
262     }
263 
notifyReadRemoteRssi(int rssi)264     private void notifyReadRemoteRssi(int rssi) {
265         Intent intent = new Intent(BLE_READ_REMOTE_RSSI);
266         intent.putExtra(EXTRA_RSSI_VALUE, rssi);
267         sendBroadcast(intent);
268     }
269 
getService()270     private BluetoothGattService getService() {
271         if (mBluetoothGatt == null) return null;
272 
273         BluetoothGattService service = mBluetoothGatt.getService(SERVICE_UUID);
274         if (service == null) {
275             showMessage("Service not found");
276             return null;
277         }
278         return service;
279     }
280 
getCharacteristic(UUID uuid)281     private BluetoothGattCharacteristic getCharacteristic(UUID uuid) {
282         BluetoothGattService service = getService();
283         if (service == null) return null;
284 
285         BluetoothGattCharacteristic characteristic = service.getCharacteristic(uuid);
286         if (characteristic == null) {
287             showMessage("Characteristic not found");
288             return null;
289         }
290         return characteristic;
291     }
292 
getDescriptor()293     private BluetoothGattDescriptor getDescriptor() {
294         BluetoothGattCharacteristic characteristic = getCharacteristic(CHARACTERISTIC_UUID);
295         if (characteristic == null) return null;
296 
297         BluetoothGattDescriptor descriptor = characteristic.getDescriptor(DESCRIPTOR_UUID);
298         if (descriptor == null) {
299             showMessage("Descriptor not found");
300             return null;
301         }
302         return descriptor;
303     }
304 
showMessage(final String msg)305     private void showMessage(final String msg) {
306         mHandler.post(new Runnable() {
307             public void run() {
308                 Toast.makeText(BleClientService.this, msg, Toast.LENGTH_SHORT).show();
309             }
310         });
311     }
312 
313     private final BluetoothGattCallback mGattCallbacks = new BluetoothGattCallback() {
314         @Override
315         public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
316             if (DEBUG) Log.d(TAG, "onConnectionStateChange");
317             if (status == BluetoothGatt.GATT_SUCCESS) {
318                 if (newState == BluetoothProfile.STATE_CONNECTED) notifyConnected();
319                 else if (status == BluetoothProfile.STATE_DISCONNECTED) {
320                     notifyDisconnected();
321                     showMessage("Bluetooth LE disconnected");
322                 }
323             }
324         }
325 
326         @Override
327         public void onServicesDiscovered(BluetoothGatt gatt, int status) {
328             if ((status == BluetoothGatt.GATT_SUCCESS) &&
329                 (mBluetoothGatt.getService(SERVICE_UUID) != null)) {
330                 notifyServicesDiscovered();
331             }
332         }
333 
334         @Override
335         public void onCharacteristicRead(BluetoothGatt gatt,
336                                          BluetoothGattCharacteristic characteristic, int status) {
337             if ((status == BluetoothGatt.GATT_SUCCESS) &&
338                 (characteristic.getUuid().equals(CHARACTERISTIC_UUID))) {
339                 notifyCharacteristicRead(characteristic.getStringValue(0));
340             }
341         }
342 
343         @Override
344         public void onCharacteristicWrite(BluetoothGatt gatt,
345                                           BluetoothGattCharacteristic characteristic, int status) {
346             if (DEBUG) Log.d(TAG, "onCharacteristicWrite: characteristic.val=" + characteristic.getStringValue(0)
347                                   + " status=" + status);
348             BluetoothGattCharacteristic mCharacteristic = getCharacteristic(CHARACTERISTIC_UUID);
349             if ((status == BluetoothGatt.GATT_SUCCESS) &&
350                 (characteristic.getStringValue(0).equals(mCharacteristic.getStringValue(0)))) {
351                 notifyCharacteristicWrite();
352             }
353         }
354 
355         @Override
356         public void onCharacteristicChanged(BluetoothGatt gatt,
357                                             BluetoothGattCharacteristic characteristic) {
358             if (characteristic.getUuid().equals(UPDATE_CHARACTERISTIC_UUID))
359                 notifyCharacteristicChanged(characteristic.getStringValue(0));
360         }
361 
362         @Override
363         public void onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor,
364                                      int status) {
365             if ((status == BluetoothGatt.GATT_SUCCESS) &&
366                 (descriptor.getUuid().equals(DESCRIPTOR_UUID))) {
367                 notifyDescriptorRead(new String(descriptor.getValue()));
368             }
369         }
370 
371         @Override
372         public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor,
373                                       int status) {
374             if ((status == BluetoothGatt.GATT_SUCCESS) &&
375                 (descriptor.getUuid().equals(DESCRIPTOR_UUID))) {
376                 notifyDescriptorWrite();
377             }
378         }
379 
380         @Override
381         public void onReliableWriteCompleted(BluetoothGatt gatt, int status) {
382             if (status == BluetoothGatt.GATT_SUCCESS) notifyReliableWriteCompleted();
383         }
384 
385         @Override
386         public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) {
387             if (status == BluetoothGatt.GATT_SUCCESS) notifyReadRemoteRssi(rssi);
388         }
389     };
390 }