连接到BLE设备后如何获得电池电量?

我正在开发一个应用程序,我必须连接到Android 4.3上的蓝牙设备。

我想通过使用Battery_ServiceBattery_Level来获取电池电量。

public class BluetoothLeService extends Service { private static final UUID Battery_Service_UUID = UUID.fromString("0000180F-0000-1000-8000-00805f9b34fb"); private static final UUID Battery_Level_UUID = UUID.fromString("00002a19-0000-1000-8000-00805f9b34fb"); public void getbattery() { BluetoothGattService batteryService = mBluetoothGatt.getService(Battery_Service_UUID); if(batteryService == null) { Log.d(TAG, "Battery service not found!"); return; } BluetoothGattCharacteristic batteryLevel = batteryService.getCharacteristic(Battery_Level_UUID); if(batteryLevel == null) { Log.d(TAG, "Battery level not found!"); return; } mBluetoothGatt.readCharacteristic(batteryLevel);      // What should I do that I can get the battery level ?? Log.d(TAG, "Battery level " + mBluetoothGatt.readCharacteristic(batteryLevel);); } 

mBluetoothGatt.readCharacteristic(batteryLevel);的值mBluetoothGatt.readCharacteristic(batteryLevel); 不是电池电量值

如何阅读电池?

Solutions Collecting From Web of "连接到BLE设备后如何获得电池电量?"

我已经解决了这个问题。

 public class BluetoothLeService extends Service { private static final UUID Battery_Service_UUID = UUID.fromString("0000180F-0000-1000-8000-00805f9b34fb"); private static final UUID Battery_Level_UUID = UUID.fromString("00002a19-0000-1000-8000-00805f9b34fb"); public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if(status == BluetoothGatt.GATT_SUCCESS) { broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } } private void broadcastUpdate(final String action, final BluetoothGattCharacteristic characteristic) { final Intent intent = new Intent(action); Log.v(TAG, "characteristic.getStringValue(0) = " + characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0)); intent.putExtra(DeviceControl.EXTRAS_DEVICE_BATTERY, characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0)); sendBroadcast(intent); } public void getbattery() { BluetoothGattService batteryService = mBluetoothGatt.getService(Battery_Service_UUID); if(batteryService == null) { Log.d(TAG, "Battery service not found!"); return; } BluetoothGattCharacteristic batteryLevel = batteryService.getCharacteristic(Battery_Level_UUID); if(batteryLevel == null) { Log.d(TAG, "Battery level not found!"); return; } mBluetoothGatt.readCharacteristic(batteryLevel); Log.v(TAG, "batteryLevel = " + mBluetoothGatt.readCharacteristic(batteryLevel)); } 

当你调用函数getbattery() ,它会调用onCharacteristicReadonCharacteristicRead将调用broadcastUpdate并将其传递给它的特性和动作。

broadcastUpdate中的characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0)是BLE设备的电池值。