1 notifications android android-notifications bluetooth-lowenergy
我厌倦了使用 Android BLE SDK 与我的 Glucose 设备进行通信。我需要 UUID 2a18 和 2a34 的 setCharacteristicNotification。我参考Android官方SDK如下:
http://developer.android.com/guide/topics/connectivity/bluetooth-le.html#notification
BluetoothGattCharacteristic charGM =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_GLUCOSE_MEASUREMENT_STRING));
mConnGatt.setCharacteristicNotification(charGM, enabled);
BluetoothGattDescriptor descGM = charGM.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descGM.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descGM);
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但它甚至无法进入 onCharacteristicChanged 回调。
我的 onCharacteristicChanged 如下:
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),"onCharacteristicChanged",Toast.LENGTH_LONG).show();
setProgressBarIndeterminateVisibility(false);
};
});
}
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如果我按如下方式设置电池电量通知,它就会起作用。
BluetoothGattCharacteristic charBarrery =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_BATTERY))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_BATTERY_LEVEL_STRING));
mConnGatt.setCharacteristicNotification(charBarrery, enabled);
BluetoothGattDescriptor descBarrery = charBarrery.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descBarrery.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descBarrery);
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我不知道电池和血糖通知有什么不同。
如果有人知道我应该做什么,请帮助我。
额外的:
当我使用电池服务时,我的logcat如下:
07-29 10:28:17.924: D/BluetoothGatt(947): setCharacteristicNotification() - uuid: 00002a19-0000-1000-8000-00805f9b34fb enable: true
07-29 10:28:17.924: D/BluetoothGatt(947): writeDescriptor() - uuid: 00002902-0000-1000-8000-00805f9b34fb
07-29 10:28:18.484: D/BluetoothGatt(947): onDescriptorWrite() - Device=B4:AB:2C:06:9E:F4 UUID=00002a19-0000-1000-8000-00805f9b34fb
07-29 10:28:18.604: D/BluetoothGatt(947): onNotify() - Device=B4:AB:2C:06:9E:F4 UUID=00002a19-0000-1000-8000-00805f9b34fb
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但是当我使用 Glucose 时,我的 logcat 丢失了 onNotify(),如下所示:
07-29 10:31:23.729: D/BluetoothGatt(1763): setCharacteristicNotification() - uuid: 00002a18-0000-1000-8000-00805f9b34fb enable: true
07-29 10:31:23.729: D/BluetoothGatt(1763): writeDescriptor() - uuid: 00002902-0000-1000-8000-00805f9b34fb
07-29 10:31:24.324: D/BluetoothGatt(1763): onDescriptorWrite() - Device=B4:AB:2C:06:9E:F4 UUID=00002a18-0000-1000-8000-00805f9b34fb
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我不知道为什么 logcat 失去了 onNotify()...
附加(8/4):
感谢您的回复 !我尝试启用记录访问控制点特征的指示,但失败了。我的流程如下:
启用有关血糖测量特征和血糖测量上下文特征的通知并启用有关记录访问控制点特征的指示
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
for (BluetoothGattService service : gatt.getServices()) {
if ((service == null) || (service.getUuid() == null)) {
continue;
}
if (BleUuid.SERVICE_GLUCOSE.equalsIgnoreCase(service
.getUuid().toString())) {
BluetoothGattCharacteristic charGM =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_GLUCOSE_MEASUREMENT_STRING));
mConnGatt.setCharacteristicNotification(charGM, enabled);
BluetoothGattDescriptor descGM = charGM.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descGM.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descGM);
BluetoothGattCharacteristic charGMC =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_GLUCOSE_MEASUREMENT_CONTEXT_STRING));
mConnGatt.setCharacteristicNotification(charGMC, enabled);
BluetoothGattDescriptor descGMC = charGMC.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descGMC.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descGMC);
BluetoothGattCharacteristic charRACP =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_RECORD_ACCESS_CONTROL_POINT_STRING));
mConnGatt.setCharacteristicNotification(charRACP, enabled);
BluetoothGattDescriptor descRACP = charRACP.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descRACP.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
mConnGatt.writeDescriptor(descRACP);
BluetoothGattCharacteristic charBarrery =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_BATTERY))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_BATTERY_LEVEL_STRING));
mConnGatt.setCharacteristicNotification(charBarrery, enabled);
BluetoothGattDescriptor descBarrery = charBarrery.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descBarrery.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descBarrery);
runOnUiThread(new Runnable() {
public void run() {
btnUpdateData.setEnabled(true);
};
});
}
}
};
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case R.id.btnUpdateData:
try{
//***SEND 0x0101 TO RECORD ACCESS CONTROL POINT
BluetoothGattCharacteristic writeRACPchar =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_RECORD_ACCESS_CONTROL_POINT_STRING));
byte[] data = new byte[1];
data[0] = (byte)0x0101;
writeRACPchar.setValue(data);
mConnGatt.writeCharacteristic(writeRACPchar);
}catch(Exception e){
e.printStackTrace();
}
break;
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@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
@Override
public void onCharacteristicWrite(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic, int status) {
};
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
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private void broadcastUpdate(final String action,
final BluetoothGattCharacteristic characteristic) {
final Intent intent = new Intent(action);
if (BleUuid.CHAR_SERIAL_NUMBEAR_STRING
.equalsIgnoreCase(characteristic.getUuid().toString())) {
displayResult(characteristic.getStringValue(0));
}else if(BleUuid.CHAR_MANUFACTURER_NAME_STRING
.equalsIgnoreCase(characteristic.getUuid().toString())){
displayResult(characteristic.getStringValue(0));
} else if(BleUuid.CHAR_BATTERY_LEVEL_STRING
.equalsIgnoreCase(characteristic.getUuid().toString())){
final byte[] data = characteristic.getValue();
String dataStr = "";
dataStr = String.format("%02X", data[0]);
int a = Integer.parseInt(dataStr, 16);
String result = "battery level: " + Integer.toString(a)+ "%";
displayResult(result);
} else {
// For all other profiles, writes the data formatted in HEX.
final byte[] data = characteristic.getValue();
if (data != null && data.length > 0) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for(byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));
displayResult(stringBuilder.toString());
}
}
}
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&
private void displayResult(String result){
adUpdateData.add(result);
runOnUiThread(new Runnable() {
public void run() {
lvUpdateData.setAdapter(adUpdateData);
};
});
}
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我试图理解“GLS_SPEC”pdf...我使用了 Nordic Semiconductor 的葡萄糖服务示例应用程序,它可以工作。我尝试学习如何实现该功能。
我注意到 LogCat 上显示了一些类似“unregisterIRListener() is called”的日志,但我不确定是否与我的问题有关......
谢谢阅读。
葡萄糖和电池服务存在逻辑差异。当您启用电池电量通知时(取决于实施方式),设备通常会立即向您发送电池电量。这就是为什么你在那里得到 onNotify 的原因。当然,在某些实现中,它仅在值更改时或使用其他规则时通知您,但在您的情况下,它看起来像这样。
血糖服务的作用有所不同。在葡萄糖服务 ( https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.glucose.xml ) 中,您有 3 个强制性特征。我们在这里跳过葡萄糖功能。其中之一是血糖测量,您可以在其中收到血糖读数通知。您启用这些通知的实现是正确的,它将起作用。但为了获取通知,您必须使用记录访问控制点特性来请求它们。它允许您获取所有葡萄糖读数,仅最新的,仅第一个,从设备中删除保存的读数等。例如,当您:
您应该会收到有关血糖测量字符的 N 个通知。随后是 RACP 字符上的指示。值为:0x06000101 = “报告存储的记录”的响应 | 成功。如果葡萄糖设备上没有保存任何读数,N 可能为 0。如果您使用 Nordic Semiconductor 的葡萄糖服务示例应用程序,您可以尝试按按钮 0(?) 在板上生成新结果(最多 20 个)并再次请求。
请阅读 GLS 文档:https://www.bluetooth.org/en-us/specification/adopted-specifications -> GLS -> PDF,了解有关血糖服务和记录访问控制点格式的更多信息。
编辑
您写的记录访问控制点值错误。这是工作代码:
case R.id.btnUpdateData:
try{
//***SEND 0x0101 TO RECORD ACCESS CONTROL POINT
BluetoothGattCharacteristic writeRACPchar =
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
.getCharacteristic(UUID.fromString(BleUuid.CHAR_RECORD_ACCESS_CONTROL_POINT_STRING));
byte[] data = new byte[2];
data[0] = 0x01; // Report Stored records
data[1] = 0x01; // All records
writeRACPchar.setValue(data);
// or:
// byte[] data = new byte[2];
// writeRACPchar.setValue(data);
// writeRACPchar.setIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 1, 0); // Report Stored records
// writeRACPchar.setIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 1, 1); // Read all (offset 1)
mConnGatt.writeCharacteristic(writeRACPchar);
}catch(Exception e){
e.printStackTrace();
}
break;
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你必须写2个字节,每个字节是8个,但可以写成2位十六进制,fe 0xAB r 0x01。值 0x0101 有 2 个字节,您可能不
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