Question

我正在努力解决一个奇怪的问题，即从Android设备发送到BLE加密狗的命令。这里我有两个按钮 Button1 和 Button2 。点击每个按钮我试图发送到BLE加密狗的不同命令。问题的详细说明如下：

使用两个按钮启动片段 Button1 和 Button2
点击 Button1
命令发送到BLE加密狗成功
然后点击 Button2 命令，不会发送给BLE。
再次重新运行并启动Fragment，我点击了 Buttons2
命令发送成功
他们点击 Button1 命令无法发送。

*

震荡 - 仅在第一次按下第一个按钮时发送命令。

* 现在这里是我使用的代码下面是我从Fragment的onCreateView（）调用的代码来初始化服务和广播接收器。

 if(SingleTon.getInstance().getDeviceAddress() !=null && SingleTon.getInstance().getDeviceName() != null) {
    if(!SingleTon.getInstance().isLEServiceGattInit())
    settingObj.deviceControl(getActivity(), SingleTon.getInstance().getDeviceAddress(), SingleTon.getInstance().getDeviceName());
}

现在将在代码上面调用表单的方法 -

public  void deviceControl(Context context,String deviceAddress, String devicename ){
progressServices = new ProgressDialog(context);
progressServices = ProgressDialog.show(context, "",
        "Looking for Services....", true);

this.mcontext = context;
this.mDeviceAddress = deviceAddress;
this.mDeviceName = devicename;
initServices();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    public void run() {
        if(progressServices.isShowing()) {
            progressServices.dismiss();
            Toast.makeText(mcontext,"Issue in BLE, not able to advertise Services/UUIDs.",Toast.LENGTH_LONG).show();
        }
    }
}, 6000);
}
    private void initServices(){
    Intent gattServiceIntent = new Intent(mcontext, BluetoothLeService.class);
    mcontext.bindService(gattServiceIntent, mServiceConnection, getActivity().BIND_AUTO_CREATE);
    mcontext.registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter());
}



  private final ServiceConnection mServiceConnection = new ServiceConnection() {

        @Override
        public void onServiceConnected(ComponentName componentName, IBinder service) {
            mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();

            if (!mBluetoothLeService.initialize()) {
                Log.e(TAG, "Unable to initialize");
            }
            // Automatically connects to the device upon successful start-up initialization.
            mBluetoothLeService.connect(mDeviceAddress);

        }

        @Override
        public void onServiceDisconnected(ComponentName componentName) {
            mBluetoothLeService = null;
        }
    };

        private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
                mConnected = true;

            } else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
                mConnected = false;
                SingleTon.getInstance().setLEServiceGattInit(false);

            } else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) {
                // Show all the supported services and characteristics on the user interface.
                displayGattServices(mBluetoothLeService.getSupportedGattServices());
                SingleTon.getInstance().setmBluetoothLeService(mBluetoothLeService);

            } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
            }
        }
    };



   private void displayGattServices(List<BluetoothGattService> gattServices) {
        if (gattServices == null) return;
        String uuid;
        String unknownServiceString = "Unknown Services";
        String unknownCharaString = "Unknown Characteristic";
        ArrayList<HashMap<String, String>> gattServiceData = new ArrayList<>();
        ArrayList<ArrayList<HashMap<String, String>>> gattCharacteristicData
                = new ArrayList<>();
        mGattCharacteristics = new ArrayList<>();

        // Loops through available GATT Services.
        String LIST_NAME = "NAME";
        String LIST_UUID = "UUID";
        for (BluetoothGattService gattService : gattServices) {

            uuid = gattService.getUuid().toString();
            if(uuid.contains("ff02")){

                List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics();
                // Loops through available Characteristics.
                for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
                    if (gattCharacteristic.getUuid().equals(UUID.fromString("0000c002-0000-1000-8000-00805f9b34fb"))) {

                        SingleTon.getInstance().setListWriteCharecteristic(gattCharacteristic);
                        progressServices.dismiss();
                        SingleTon.getInstance().setLEServiceGattInit(true);
                    }
                }
            }

        }

    }
        private static IntentFilter makeGattUpdateIntentFilter() {
        final IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED);
        intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED);
        intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED);
        intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE);
        return intentFilter;
    }

现在，下面是我们在每次点击按钮时调用命令发送的代码。

btn_head_up.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
            sendHexCommand(CommandListHex.Hex20BIT_ACT_HEAD_UP);
        return  true;
    }
});

private void sendHexCommand(String cmd){
if(SingleTon.getInstance().getDeviceAddress() !=null && SingleTon.getInstance().getDeviceName() != null) {
        settingObj.sendCommand(cmd, SingleTon.getInstance().getListWriteCharecteristic(), SingleTon.getInstance().getmBluetoothLeService());
} else{
    showDialog(getActivity(), getResources().getString(R.string.dialogtitle), "First do configuration for Bluetooth");
}
}

现在最后代码发送命令

public void sendCommand(String Control_INST, ArrayList<BluetoothGattCharacteristic> charFromSinglonton ,
                            BluetoothLeService bleGATTService){
        for(BluetoothGattCharacteristic gattChar :charFromSinglonton) {
            if (charFromSinglonton != null) {
                final BluetoothGattCharacteristic characteristic = gattChar;

                boolean status = bleGATTService.writeCharacteristic(characteristic, hexStringToByteArray(Control_INST));

                if (status) {
                    SingleTon.getInstance().setCorrectWriteGattCharecteristic(gattChar);
                }
            }
        }
    }

提前感谢所有人。

Answer 1

如果您点击两次相同的按钮（如第一个按钮）会发生什么？发送命令两次或只发送一次？

Android BLE命令发送不起作用

1 个答案: