我已经将通知设置为android，它不是在调用方法onCharacteristicRead()???? 它不进入该功能。为什么会这样呢？

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要求解决方案。

这是我的代码：

private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {

@Override

public void onConnectionStateChange(BluetoothGatt gatt, int status,

int newState) {

if (newState == BluetoothProfile.STATE_CONNECTED) {

Log.i(TAG, "Connected to GATT server.");

// Attempts to discover services after successful connection.

Log.i(TAG, "Attempting to start service discovery:"

+ mBluetoothGatt.discoverServices());

} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {

Log.i(TAG, "Disconnected from GATT server.");

}

}

@Override

public void onServicesDiscovered(BluetoothGatt gatt, int status) {

if (status == BluetoothGatt.GATT_SUCCESS) {

gattServices = mBluetoothGatt

.getService(SampleGattAttributes.SERVICES_UUID);

if (gattServices != null) {

gattCharacteristics = gattServices

.getCharacteristic(SampleGattAttributes.CHARACTERISTIC_UUID);

System.out.println("character-->" + gattCharacteristics);

}

if (gattCharacteristics != null) {

System.out.println("Characteristic not null");

System.out.println("Characteristic Properties-->"

+ gattCharacteristics.getProperties());

mBluetoothGatt.setCharacteristicNotification(gattCharacteristics,

true);

}

} else {

Log.w(TAG, "onServicesDiscovered received: " + status);

}

}

@Override

public void onCharacteristicRead(BluetoothGatt gatt,

BluetoothGattCharacteristic characteristic, int status) {

System.out.println("in read");

if (status == BluetoothGatt.GATT_SUCCESS) {

byte[] data = characteristic.getValue();

System.out.println("reading");

System.out.println(new String(data));

}

}

@Override

public void onCharacteristicChanged(BluetoothGatt gatt,

BluetoothGattCharacteristic characteristic) {

//

System.out.println("change");

byte[] data = characteristic.getValue();

System.out.println(new String(data));

}

};

先感谢您！！