以编程方式打开所有通知 [英] Programmatically turning on all notifications
问题描述
我是Android开发的新手,我不明白如何正确打开所有ble通知并获取所有通知.
I am new to Android development and I can't understand how to properly turn all ble notifications and get all of them.
我尝试遍历所有服务
for(BluetoothGattService service : gatt.getServices()){
if( service.getUuid().equals(Step_UUID)) {
BluetoothGattCharacteristic characteristicData = service.getCharacteristic(Step_UUID);
for (BluetoothGattDescriptor descriptor : characteristicData.getDescriptors()) {
descriptor.setValue( BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
gatt.writeDescriptor(descriptor);
}
gatt.setCharacteristicNotification(characteristicData, true);
}
}
但是我没有收到任何通知. 拜托,帮帮我,我不明白我在做什么错..
but I don't get any notifications back. Please, help I do not understand what I am doing wrong..
编辑
现在,我使用此方法在发现服务后启用通知:
Right now I use this method to enable notifications after services are discovered:
public void setCharacteristicNotification(BluetoothGattCharacteristic特性,已启用布尔值){
public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic, boolean enabled) {
// Setting default write type according to CDT 222486
characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
String serviceUUID = characteristic.getService().getUuid().toString();
String serviceName = GattAttributes.lookupUUID(characteristic.getService().getUuid(), serviceUUID);
String characteristicUUID = characteristic.getUuid().toString();
String characteristicName = GattAttributes.lookupUUID(characteristic.getUuid(), characteristicUUID);
String descriptorUUID = GattAttributes.CLIENT_CHARACTERISTIC_CONFIG;
String descriptorName = GattAttributes.lookupUUID(UUIDDatabase.UUID_CLIENT_CHARACTERISTIC_CONFIG, descriptorUUID);
if (characteristic.getDescriptor(UUID.fromString(GattAttributes.CLIENT_CHARACTERISTIC_CONFIG)) != null) {
if (enabled == true) {
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(UUID.fromString(GattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
boolean aaa = mBluetoothGatt.writeDescriptor(descriptor);
aaa = mBluetoothGatt.writeDescriptor(descriptor);
aaa = false;
} else {
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(UUID.fromString(GattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}
}
boolean aaaa = mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
aaaa = false;
}
问题在于,第一个特征通知得很好,但是我尝试启用的所有其他特征都在线上失败了
The problem is that first characteristic notifies well, but all others I am trying to enable fails on the line
mBluetoothGatt.writeDescriptor(descriptor);
mBluetoothGatt.writeDescriptor(descriptor);
不知道该怎么办...
Don't know what to do...
推荐答案
我的问题通过覆盖onDescriptorWrite方法得以解决.我在里面做了一个标记,如果是真的,我会继续通知所有剩余的特征.
My problem was resolved by overiding onDescriptorWrite method. I made a flag inside, and if it is true I continue to notify all left characteristics.
@Override public void onDescriptorWrite(BluetoothGatt gatt,BluetoothGattDescriptor描述符,int状态){ 字符串serviceUUID = descriptor.getCharacteristic().getService().getUuid().toString(); 字符串serviceName = GattAttributes.lookupUUID(descriptor.getCharacteristic().getService().getUuid(),serviceUUID);
@Override public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) { String serviceUUID = descriptor.getCharacteristic().getService().getUuid().toString(); String serviceName = GattAttributes.lookupUUID(descriptor.getCharacteristic().getService().getUuid(), serviceUUID);
String characteristicUUID = descriptor.getCharacteristic().getUuid().toString();
String characteristicName = GattAttributes.lookupUUID(descriptor.getCharacteristic().getUuid(), characteristicUUID);
String descriptorUUID = descriptor.getUuid().toString();
String descriptorName = GattAttributes.lookupUUID(descriptor.getUuid(), descriptorUUID);
if (status == BluetoothGatt.GATT_SUCCESS) {
written = true;
numberLeft--;
} else {
written = true;
numberLeft--;
}
}
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