我正在尝试从/向 BLE 模块读写 (HF-BL100-CU)使用 this guide但是当我尝试获取服务时它返回 NULL:
这里:
BluetoothGattService mCustomService = mBluetoothGatt.getService(UUID.fromString("00002b11-0000-1000-8000-00805f9b34fb"));
if(mCustomService == null){
Log.w(TAG, "Custom BLE Service not found on write");
return;
}
这里:
BluetoothGattService mCustomService = mBluetoothGatt.getService(UUID.fromString("00002b10-0000-1000-8000-00805f9b34fb"));
if(mCustomService == null){
Log.w(TAG, "Custom BLE Service not found on read");
return;
}
有人建议here之前应该有一个完整的服务发现，但我很确定我已经这样做了，我可能是错的，因为我是 BLE 的新手并且仍在尝试掌握其协议(protocol)(已发现服务的输出日志添加在结束)。
从数据表和 BLE 应用程序中，用于读/写的 UUID 是 - 读:2B10，写:2B11
任何帮助将不胜感激。
蓝牙服务.java:
package com.example.android.bluetoothlegatt;
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import java.util.List;
import java.util.UUID;
/**
* Service for managing connection and data communication with a GATT server hosted on a
* given Bluetooth LE device.
*/
public class BluetoothLeService extends Service {
private final static String TAG = BluetoothLeService.class.getSimpleName();
private BluetoothManager mBluetoothManager;
private BluetoothAdapter mBluetoothAdapter;
private String mBluetoothDeviceAddress;
private BluetoothGatt mBluetoothGatt;
private int mConnectionState = STATE_DISCONNECTED;
private static final int STATE_DISCONNECTED = 0;
private static final int STATE_CONNECTING = 1;
private static final int STATE_CONNECTED = 2;
public final static String ACTION_GATT_CONNECTED =
"com.example.bluetooth.le.ACTION_GATT_CONNECTED";
public final static String ACTION_GATT_DISCONNECTED =
"com.example.bluetooth.le.ACTION_GATT_DISCONNECTED";
public final static String ACTION_GATT_SERVICES_DISCOVERED =
"com.example.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED";
public final static String ACTION_DATA_AVAILABLE =
"com.example.bluetooth.le.ACTION_DATA_AVAILABLE";
public final static String EXTRA_DATA =
"com.example.bluetooth.le.EXTRA_DATA";
public final static UUID UUID_HEART_RATE_MEASUREMENT =
UUID.fromString(SampleGattAttributes.HEART_RATE_MEASUREMENT);
// Implements callback methods for GATT events that the app cares about. For example,
// connection change and services discovered.
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
if (newState == BluetoothProfile.STATE_CONNECTED) {
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
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) {
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
Log.i(TAG, "Disconnected from GATT server.");
broadcastUpdate(intentAction);
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
};
private void broadcastUpdate(final String action) {
final Intent intent = new Intent(action);
sendBroadcast(intent);
}
private void broadcastUpdate(final String action,
final BluetoothGattCharacteristic characteristic) {
final Intent intent = new Intent(action);
// This is special handling for the Heart Rate Measurement profile. Data parsing is
// carried out as per profile specifications:
// http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml
if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
int flag = characteristic.getProperties();
int format = -1;
if ((flag & 0x01) != 0) {
format = BluetoothGattCharacteristic.FORMAT_UINT16;
Log.d(TAG, "Heart rate format UINT16.");
} else {
format = BluetoothGattCharacteristic.FORMAT_UINT8;
Log.d(TAG, "Heart rate format UINT8.");
}
final int heartRate = characteristic.getIntValue(format, 1);
Log.d(TAG, String.format("Received heart rate: %d", heartRate));
intent.putExtra(EXTRA_DATA, String.valueOf(heartRate));
} else {
// For all other profiles, writes the data formatted in HEX.
final byte[] data = characteristic.getValue();
if (data != null && data.length > 0) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for(byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));
intent.putExtra(EXTRA_DATA, new String(data) + "\n" + stringBuilder.toString());
}
}
sendBroadcast(intent);
}
public class LocalBinder extends Binder {
BluetoothLeService getService() {
return BluetoothLeService.this;
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public boolean onUnbind(Intent intent) {
// After using a given device, you should make sure that BluetoothGatt.close() is called
// such that resources are cleaned up properly. In this particular example, close() is
// invoked when the UI is disconnected from the Service.
close();
return super.onUnbind(intent);
}
private final IBinder mBinder = new LocalBinder();
/**
* Initializes a reference to the local Bluetooth adapter.
*
* @return Return true if the initialization is successful.
*/
public boolean initialize() {
// For API level 18 and above, get a reference to BluetoothAdapter through
// BluetoothManager.
if (mBluetoothManager == null) {
mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
if (mBluetoothManager == null) {
Log.e(TAG, "Unable to initialize BluetoothManager.");
return false;
}
}
mBluetoothAdapter = mBluetoothManager.getAdapter();
if (mBluetoothAdapter == null) {
Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
return false;
}
return true;
}
/**
* Connects to the GATT server hosted on the Bluetooth LE device.
*
* @param address The device address of the destination device.
*
* @return Return true if the connection is initiated successfully. The connection result
* is reported asynchronously through the
* {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
* callback.
*/
public boolean connect(final String address) {
if (mBluetoothAdapter == null || address == null) {
Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
return false;
}
// Previously connected device. Try to reconnect.
if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
&& mBluetoothGatt != null) {
Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
if (mBluetoothGatt.connect()) {
mConnectionState = STATE_CONNECTING;
return true;
} else {
return false;
}
}
final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
if (device == null) {
Log.w(TAG, "Device not found. Unable to connect.");
return false;
}
// We want to directly connect to the device, so we are setting the autoConnect
// parameter to false.
mBluetoothGatt = device.connectGatt(this, false, mGattCallback);
Log.d(TAG, "Trying to create a new connection.");
mBluetoothDeviceAddress = address;
mConnectionState = STATE_CONNECTING;
return true;
}
/**
* Disconnects an existing connection or cancel a pending connection. The disconnection result
* is reported asynchronously through the
* {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
* callback.
*/
public void disconnect() {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.disconnect();
}
/**
* After using a given BLE device, the app must call this method to ensure resources are
* released properly.
*/
public void close() {
if (mBluetoothGatt == null) {
return;
}
mBluetoothGatt.close();
mBluetoothGatt = null;
}
/**
* Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
* asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
* callback.
*
* @param characteristic The characteristic to read from.
*/
public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.readCharacteristic(characteristic);
}
/**
* Enables or disables notification on a give characteristic.
*
* @param characteristic Characteristic to act on.
* @param enabled If true, enable notification. False otherwise.
*/
public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
boolean enabled) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
// This is specific to Heart Rate Measurement.
if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}
}
/**
* Retrieves a list of supported GATT services on the connected device. This should be
* invoked only after {@code BluetoothGatt#discoverServices()} completes successfully.
*
* @return A {@code List} of supported services.
*/
public List<BluetoothGattService> getSupportedGattServices() {
if (mBluetoothGatt == null) return null;
return mBluetoothGatt.getServices();
}
public void readCustomCharacteristic() {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
/*check if the service is available on the device*/
BluetoothGattService mCustomService = mBluetoothGatt.getService(UUID.fromString("00002b10-0000-1000-8000-00805f9b34fb"));
if(mCustomService == null){
Log.w(TAG, "Custom BLE Service not found on read");
return;
}
/*get the read characteristic from the service*/
BluetoothGattCharacteristic mReadCharacteristic = mCustomService.getCharacteristic(UUID.fromString("00002b10-0000-1000-8000-00805f9b34fb"));
if(mBluetoothGatt.readCharacteristic(mReadCharacteristic) == false){
Log.w(TAG, "Failed to read characteristic");
}
}
public void writeCustomCharacteristic(int value) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
/*check if the service is available on the device*/
BluetoothGattService mCustomService = mBluetoothGatt.getService(UUID.fromString("00002b11-0000-1000-8000-00805f9b34fb"));
if(mCustomService == null){
Log.w(TAG, "Custom BLE Service not found on write");
return;
}
/*get the read characteristic from the service*/
BluetoothGattCharacteristic mWriteCharacteristic = mCustomService.getCharacteristic(UUID.fromString("00002b11-0000-1000-8000-00805f9b34fb"));
mWriteCharacteristic.setValue(value,android.bluetooth.BluetoothGattCharacteristic.FORMAT_UINT8,0);
if(mBluetoothGatt.writeCharacteristic(mWriteCharacteristic) == false){
Log.w(TAG, "Failed to write characteristic");
}
}
}
日志:
12-26 17:40:46.394 6751-6869/com.example.android.bluetoothlegatt D/Surface: Surface::setBuffersDimensions(this=0x7f75a0d400,w=720,h=1280)
12-26 17:40:46.400 6751-6869/com.example.android.bluetoothlegatt W/MALI: glDrawArrays:714: [MALI] glDrawArrays takes more than 5ms here. Total elapse time(us): 5591
12-26 17:40:51.840 6751-6751/com.example.android.bluetoothlegatt D/BluetoothLeService: Trying to use an existing mBluetoothGatt for connection.
12-26 17:40:51.840 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.844 6751-6751/com.example.android.bluetoothlegatt D/ActivityThread: ACT-AM_ON_RESUME_CALLED ActivityRecord{38f72c65 token=android.os.BinderProxy@be2dd3a {com.example.android.bluetoothlegatt/com.example.android.bluetoothlegatt.DeviceControlActivity}}
12-26 17:40:51.844 6751-6751/com.example.android.bluetoothlegatt D/DeviceControlActivity: Connect request result=true
12-26 17:40:51.845 6751-6751/com.example.android.bluetoothlegatt D/FeatureProxyBase: FeatureProxyBase class constructor
12-26 17:40:51.845 6751-6751/com.example.android.bluetoothlegatt D/FeatureProxyBase: getService(), serviceName = multiwindow_service_v1
12-26 17:40:51.845 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=1 device=BB:A0:50:00:00:10
12-26 17:40:51.845 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.858 6751-6751/com.example.android.bluetoothlegatt D/ActivityThread: ACT-RESUME_ACTIVITY handled : 1 / android.os.BinderProxy@be2dd3a
12-26 17:40:51.860 6751-6826/com.example.android.bluetoothlegatt I/BluetoothLeService: Connected to GATT server.
12-26 17:40:51.860 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.860 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: discoverServices() - device: BB:A0:50:00:00:10
12-26 17:40:51.860 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.862 6751-6826/com.example.android.bluetoothlegatt I/BluetoothLeService: Attempting to start service discovery:true
12-26 17:40:51.864 6751-6769/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetService() - Device=BB:A0:50:00:00:10 UUID=00001800-0000-1000-8000-00805f9b34fb
12-26 17:40:51.864 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.873 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetService() - Device=BB:A0:50:00:00:10 UUID=00001801-0000-1000-8000-00805f9b34fb
12-26 17:40:51.873 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.873 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetService() - Device=BB:A0:50:00:00:10 UUID=00002b00-0000-1000-8000-00805f9b34fb
12-26 17:40:51.873 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.889 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002a00-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=2
12-26 17:40:51.889 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.889 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.904 6751-6769/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002a01-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=2
12-26 17:40:51.904 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.904 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.912 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002a04-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=2
12-26 17:40:51.912 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.912 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.952 6751-6771/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002a05-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=34
12-26 17:40:51.952 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.952 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.952 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.969 6751-6769/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002b10-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=20
12-26 17:40:51.969 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.969 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.969 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.969 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.978 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002b11-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=6
12-26 17:40:51.978 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.978 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.978 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.978 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.980 6751-6771/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002b12-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=4
12-26 17:40:51.980 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.980 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.980 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.980 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.985 6751-6769/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetCharacteristic() - Device=BB:A0:50:00:00:10 UUID=00002b13-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0 charProps=24
12-26 17:40:51.985 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.985 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.985 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:51.985 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.042 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetDescriptor() - Device=BB:A0:50:00:00:10 UUID=00002902-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0descrInstId=0
12-26 17:40:52.042 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.042 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.042 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.054 6751-6771/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetDescriptor() - Device=BB:A0:50:00:00:10 UUID=00002902-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0descrInstId=0
12-26 17:40:52.054 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.054 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.054 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.054 6751-6771/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.088 6751-6769/com.example.android.bluetoothlegatt D/BluetoothGatt: onGetDescriptor() - Device=BB:A0:50:00:00:10 UUID=00002902-0000-1000-8000-00805f9b34fb srvcType=0 srvcInstId=0 charInstId=0descrInstId=0
12-26 17:40:52.088 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.088 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.088 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.088 6751-6769/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.100 6751-6826/com.example.android.bluetoothlegatt D/BluetoothGatt: onSearchComplete() = Device=BB:A0:50:00:00:10 Status=0
12-26 17:40:52.100 6751-6826/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:40:52.807 6751-6869/com.example.android.bluetoothlegatt D/Surface: Surface::setBuffersDimensions(this=0x7f75a0d400,w=720,h=1280)
12-26 17:41:00.457 6751-6751/com.example.android.bluetoothlegatt D/FeatureProxyBase: FeatureProxyBase class constructor
12-26 17:41:00.458 6751-6751/com.example.android.bluetoothlegatt D/FeatureProxyBase: getService(), serviceName = multiwindow_service_v1
12-26 17:41:00.472 6751-6869/com.example.android.bluetoothlegatt D/Surface: Surface::setBuffersDimensions(this=0x7f75a0d400,w=720,h=1280)
12-26 17:41:00.548 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:41:00.548 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:41:00.548 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:41:00.548 6751-6751/com.example.android.bluetoothlegatt W/BluetoothLeService: Custom BLE Service not found on write
12-26 17:41:00.554 6751-6869/com.example.android.bluetoothlegatt D/Surface: Surface::setBuffersDimensions(this=0x7f75a0d400,w=720,h=1280)
12-26 17:41:01.385 6751-6751/com.example.android.bluetoothlegatt D/FeatureProxyBase: FeatureProxyBase class constructor
12-26 17:41:01.385 6751-6751/com.example.android.bluetoothlegatt D/FeatureProxyBase: getService(), serviceName = multiwindow_service_v1
12-26 17:41:01.405 6751-6869/com.example.android.bluetoothlegatt D/Surface: Surface::setBuffersDimensions(this=0x7f75a0d400,w=720,h=1280)
12-26 17:41:01.511 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:41:01.511 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:41:01.511 6751-6751/com.example.android.bluetoothlegatt D/BluetoothDevice: mAddress: BB:A0:50:00:00:10
12-26 17:41:01.512 6751-6751/com.example.android.bluetoothlegatt W/BluetoothLeService: Custom BLE Service not found on read
12-26 17:41:01.528 6751-6869/com.example.android.bluetoothlegatt D/Surface: Surface::setBuffersDimensions(this=0x7f75a0d400,w=720,h=1280)
最佳答案
我没有意识到服务和特征有不同的 UUID，仔细查看后我发现我只使用了特征(读和写)的 UUID。 将服务的 UUID 从 2b10/2b11 更改为 2b00 解决了这个问题。
关于java - 未找到自定义 BLE 服务，mBluetoothGatt.getService(uuid) 返回 null，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41333425/