Android BluetoothGatt setCharacteristicNotification仅设置第一个特征
我在通过同一蓝牙设备同时使用两种不同的特性时遇到了问题。它只记录第一个特征,而不记录第二个特征。如果我切换它们,它仍然会注册第一行,但不会注册第二行。第一个和第二个特征都需要注册和接收。如果有帮助,我使用的是运行4.4.2的三星Galaxy S4 下面是调用setCharacteristicNotification()的代码部分 setCharacteristicNotificationAndroid BluetoothGatt setCharacteristicNotification仅设置第一个特征,android,bluetooth,gatt,Android,Bluetooth,Gatt,我在通过同一蓝牙设备同时使用两种不同的特性时遇到了问题。它只记录第一个特征,而不记录第二个特征。如果我切换它们,它仍然会注册第一行,但不会注册第二行。第一个和第二个特征都需要注册和接收。如果有帮助,我使用的是运行4.4.2的三星Galaxy S4 下面是调用setCharacteristicNotification()的代码部分 setCharacteristicNotification if (mBluetoothBeaconGatt != null && mBluetooth
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);
}
}
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);
}
}
测试变量以查看它们是否为空,并验证它们是否为非空
如果您需要其他信息或这是一个副本,请让我知道
感谢您抽出时间提供帮助。您不能同时执行多个蓝牙操作。一旦您获得一个
onDescriptorWrite
,您就可以启用/禁用下一个特征:
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);
}
来自NewCircle的精彩教程:我不确定您对多个
BluetoothGatt
对象做了什么。