我在通过同一蓝牙LE设备同时使用两个不同的特性时遇到了麻烦。它仅记录第一个特征,而不记录第二个特征。如果我切换它们,它仍然会注册第一个而不是第二个。第一和第二特性都需要注册和接收。如果有帮助,我正在使用运行4.4.2的Samsung Galaxy S4。
这是调用setCharacteristicNotification()的代码部分
if (mBluetoothBeaconGatt != null && mBluetoothBeaconGatt.getService(UUID_CUSTOM_SERVICE) != null) {
characteristicBracelet = mBluetoothBeaconGatt.getService(UUID_CUSTOM_SERVICE)
.getCharacteristic(UUID_CUSTOM_BRACELET);
characteristicBeacon = mBluetoothBeaconGatt.getService(UUID_CUSTOM_SERVICE)
.getCharacteristic(UUID_CUSTOM_BEACON);
if(characteristicBracelet != null) {
Log.i(TAG, "Init Bracelet Characteristics");
this.setCharacteristicNotification(characteristicBracelet,
true);
}
if(characteristicBeacon != null) {
Log.i(TAG, "Init Beacon Characteristics");
this.setCharacteristicNotification(characteristicBeacon, true);
}
}
setCharacteristicNotification
if (UUID_CUSTOM_BEACON.equals(characteristic.getUuid())) {
if (mBluetoothBeaconGatt != null) {
Log.i(TAG, "Enabling indication for beacon");
mBluetoothBeaconGatt.setCharacteristicNotification(characteristic, enabled);
BluetoothGattDescriptor descriptor = characteristic
.getDescriptor(UUID
.fromString(CustomGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor
.setValue((enabled) ? BluetoothGattDescriptor.ENABLE_INDICATION_VALUE
: BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
mBluetoothBeaconGatt.writeDescriptor(descriptor);
}
} else if (UUID_CUSTOM_BRACELET.equals(characteristic.getUuid())) {
if (mBluetoothBraceletGatt != null || mBluetoothBeaconGatt != null) {
BluetoothGatt gatt = (mBluetoothBeaconGatt != null) ? mBluetoothBeaconGatt : mBluetoothBraceletGatt;
gatt.setCharacteristicNotification(characteristic, enabled);
BluetoothGattDescriptor descriptor = characteristic
.getDescriptor(UUID
.fromString(CustomGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor
.setValue((enabled) ? BluetoothGattDescriptor.ENABLE_INDICATION_VALUE
: BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
gatt.writeDescriptor(descriptor);
}
}
经过测试以查看它们是否为空的变量将验证它们是否为非空。
如果您需要其他信息,或者这是重复的,请告诉我。
感谢您抽出宝贵的时间来帮助您。
您不能同时执行多个蓝牙操作。一旦获得onDescriptorWrite
,就可以启用/禁用下一个特性:
private int index;
private boolean enabled;
private BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
index++;
setNotification();
}
}
public void notify(boolean enabled){
index = 0;
this.enabled = enabled;
setNotification();
}
private void setNotification(){
BluetoothGattCharacteristic characteristic;
switch(index){
case 0:
characteristic = mBluetoothGatt.getService(MY_SERVICE_UUID)
.getCharacteristic(UUID_CUSTOM_BRACELET);
break;
case 1:
characteristic = mBluetoothGatt.getService(MY_SERVICE_UUID)
.getCharacteristic(UUID_CUSTOM_BEACON);
break;
default:
return;
}
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(CLIENT_CHARACTERISTIC_CONFIG);
descriptor.setValue((enabled) ? BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
: BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(desc);
}
NewCircle的不错的教程:https ://newcircle.com/s/post/1553/bluetooth_smart_le_android_tutorial
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