广元做网站站排名,永康高端网站建设,jsp网站开发存在的问题,重庆万州网站建设公司电话下面是基于实际的项目得到的具体步骤及核心代码
1、权限问题 先判断手机是否满足android4.3以上版本#xff0c;再判断手机是否开启蓝牙 主要涉及蓝牙权限和位置权限#xff0c;注意不同android版本之间权限申请的差异#xff0c;以及android权限动态申请和静态申请的区别 …下面是基于实际的项目得到的具体步骤及核心代码
1、权限问题 先判断手机是否满足android4.3以上版本再判断手机是否开启蓝牙 主要涉及蓝牙权限和位置权限注意不同android版本之间权限申请的差异以及android权限动态申请和静态申请的区别 //动态申请权限相关
private String[] requestPermissionArray new String[]{Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION,//Manifest.permission.ACCESS_BACKGROUND_LOCATION,Manifest.permission.BLUETOOTH,Manifest.permission.BLUETOOTH_ADMIN,Manifest.permission.BLUETOOTH_SCAN,Manifest.permission.BLUETOOTH_ADVERTISE,Manifest.permission.BLUETOOTH_CONNECT,Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE
};/*** 初始化权限*/
public void initNeedPermissions() {/**Android 6.0以上动态申请权限*/if(Build.VERSION.SDK_INT Build.VERSION_CODES.M){final PermissionRequest permissionRequest new PermissionRequest();permissionRequest.requestRuntimePermission(MainActivity.this, requestPermissionArray, new PermissionListener() {Overridepublic void onGranted() {Log.d(TAG,所有权限已被授予);}/**用户勾选“不再提醒”拒绝权限后关闭程序再打开程序只进入该方法*/Overridepublic void onDenied(ListString deniedPermissions) {deniedPermissionList deniedPermissions;for (String deniedPermission : deniedPermissionList) {Log.e(TAG,被拒绝权限 deniedPermission);}}});}
} 静态权限 uses-feature android:nameandroid.hardware.camera / uses-feature android:nameandroid.hardware.camera.autofocus / uses-permission android:nameandroid.permission.BLUETOOTH / uses-permission android:nameandroid.permission.BLUETOOTH_ADMIN / uses-permission android:nameandroid.permission.BLUETOOTH_CONNECT /uses-permission android:nameandroid.permission.BLUETOOTH_SCAN /uses-permission android:nameandroid.permission.BLUETOOTH_ADVERTISE /uses-permission android:nameandroid.permission.READ_CONTACTS /uses-permission android:nameandroid.permission.ACCESS_FINE_LOCATION /uses-permission android:nameandroid.permission.ACCESS_COARSE_LOCATION / uses-permission android:nameandroid.permission.INTERNET /
2、 设备是否支持 使用蓝牙之前首先要检查当前手机是否支持BLE蓝牙。 如果支持BLE蓝牙检查手机蓝牙是否已开启。如果没有开启则需要先打开蓝牙。打开手机蓝牙有两种方式一种是直接enable()打开另外一种是提示用户打开推荐第二种方式。 /*** 检测手机是否支持4.0蓝牙* param context 上下文* return true--支持4.0 false--不支持4.0*/private boolean checkBle(Context context){if (Build.VERSION.SDK_INT Build.VERSION_CODES.JELLY_BEAN_MR2) { //API 18 Android 4.3bluetoothManager (BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE);if(bluetoothManager null){return false;}bluetooth4Adapter bluetoothManager.getAdapter(); //BLUETOOTH权限if(bluetooth4Adapter null){return false;}else{Log.d(TAG,该设备支持蓝牙4.0);return true;}}else{return false;}}
/*** 获取蓝牙状态*/public boolean isEnable(){if(bluetooth4Adapter null){return false;}return bluetooth4Adapter.isEnabled();}/*** 打开蓝牙* param isFast true 直接打开蓝牙 false 提示用户打开*/public void openBluetooth(Context context,boolean isFast){if(!isEnable()){if(isFast){Log.d(TAG,直接打开手机蓝牙);bluetooth4Adapter.enable(); //BLUETOOTH_ADMIN权限}else{Log.d(TAG,提示用户去打开手机蓝牙);Intent enableBtIntent new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);context.startActivity(enableBtIntent);}}else{Log.d(TAG,手机蓝牙状态已开);}}
3、搜索设备 搜索蓝牙搜索蓝牙回调接口中查看ble设备相关信息一定时间停止扫描 扫描设备是耗时的操作一旦扫描结束就要及时停止扫描。 //扫描设备//扫描设备回调RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)private BluetoothAdapter.LeScanCallback leScanCallback new BluetoothAdapter.LeScanCallback() {Overridepublic void onLeScan(BluetoothDevice bluetoothDevice, int rssi, byte[] bytes) {//在onLeScan()回调中尽量做少的操作可以将扫描到的设备扔到另一个线程中处理if(bluetoothDevice null)return;if(bluetoothDevice.getName() ! null){Log.d(TAG,bluetoothDevice.getName() -- bluetoothDevice.getAddress());}else{Log.d(TAG,null -- bluetoothDevice.getAddress());}BLEDevice bleDevice new BLEDevice(bluetoothDevice,rssi);if(onDeviceSearchListener ! null){onDeviceSearchListener.onDeviceFound(bleDevice); //扫描到设备回调}}};/*** 设置时间段 扫描设备* param onDeviceSearchListener 设备扫描监听* param scanTime 扫描时间*/public void startDiscoveryDevice(OnDeviceSearchListener onDeviceSearchListener,long scanTime){if(bluetooth4Adapter null){Log.e(TAG,startDiscoveryDevice--bluetooth4Adapter null);return;}this.onDeviceSearchListener onDeviceSearchListener;if(onDeviceSearchListener ! null){onDeviceSearchListener.onDiscoveryStart(); //开始扫描回调}if (Build.VERSION.SDK_INT Build.VERSION_CODES.JELLY_BEAN_MR2) {Log.d(TAG,开始扫描设备);bluetooth4Adapter.startLeScan(leScanCallback);}else{return;}//设定最长扫描时间mHandler.postDelayed(stopScanRunnable,scanTime);}private Runnable stopScanRunnable new Runnable() {RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)Overridepublic void run() {if(onDeviceSearchListener ! null){onDeviceSearchListener.onDiscoveryOutTime(); //扫描超时回调}//scanTime之后还没有扫描到设备就停止扫描。stopDiscoveryDevice();}};
4、建立连接 扫描到目标设备之后开始建立连接 这里注意连接之前一定要关闭扫描否则会影响连接。BLE与经典蓝牙不同经典蓝牙一旦建立连接就可以进行数据通讯而BLE建立连接之后还需要发现系统服务获取特定服务及读写特征。 1建立连接 发现系统服务 //执行连接 //连接/通讯结果回调RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)private BluetoothGattCallback bluetoothGattCallback new BluetoothGattCallback() {Overridepublic void onPhyUpdate(BluetoothGatt gatt, int txPhy, int rxPhy, int status) {super.onPhyUpdate(gatt, txPhy, rxPhy, status);}Overridepublic void onPhyRead(BluetoothGatt gatt, int txPhy, int rxPhy, int status) {super.onPhyRead(gatt, txPhy, rxPhy, status);}//连接状态回调-连接成功/断开连接Overridepublic void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {super.onConnectionStateChange(gatt, status, newState);Log.d(TAG,status: status);Log.d(TAG,newState: newState);switch(status){case BluetoothGatt.GATT_SUCCESS:Log.w(TAG,BluetoothGatt.GATT_SUCCESS);break;case BluetoothGatt.GATT_FAILURE:Log.w(TAG,BluetoothGatt.GATT_FAILURE);break;case BluetoothGatt.GATT_CONNECTION_CONGESTED:Log.w(TAG,BluetoothGatt.GATT_CONNECTION_CONGESTED);break;case BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION:Log.w(TAG,BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION);break;case BluetoothGatt.GATT_INSUFFICIENT_ENCRYPTION:Log.w(TAG,BluetoothGatt.GATT_INSUFFICIENT_ENCRYPTION);break;case BluetoothGatt.GATT_INVALID_OFFSET:Log.w(TAG,BluetoothGatt.GATT_INVALID_OFFSET);break;case BluetoothGatt.GATT_READ_NOT_PERMITTED:Log.w(TAG,BluetoothGatt.GATT_READ_NOT_PERMITTED);break;case BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED:Log.w(TAG,BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);break;}BluetoothDevice bluetoothDevice gatt.getDevice();Log.d(TAG,连接的设备 bluetoothDevice.getName() bluetoothDevice.getAddress());isConnectIng false;//移除连接超时mHandler.removeCallbacks(connectOutTimeRunnable);if(newState BluetoothGatt.STATE_CONNECTED){Log.w(TAG,连接成功);//连接成功去发现服务gatt.discoverServices();//设置发现服务超时时间mHandler.postDelayed(serviceDiscoverOutTimeRunnable,MAX_CONNECT_TIME);if(onBleConnectListener ! null){onBleConnectListener.onConnectSuccess(gatt,bluetoothDevice,status); //连接成功回调}}else if(newState BluetoothGatt.STATE_DISCONNECTED) {//清空系统缓存ClsUtils.refreshDeviceCache(gatt);Log.e(TAG, 断开连接status: status);gatt.close(); //断开连接释放连接if(status 133){//无法连接if(onBleConnectListener ! null){onBleConnectListener.onConnectFailure(gatt,bluetoothDevice,连接异常,status); //133连接异常 异常断开Log.e(TAG,连接失败status status bluetoothDevice.getAddress());}}else if(status 62){//成功连接没有发现服务断开if(onBleConnectListener ! null){onBleConnectListener.onConnectFailure(gatt,bluetoothDevice,连接成功服务未发现断开,status); //62没有发现服务 异常断开Log.e(TAG,连接成功服务未发现断开status: status);}}else if(status 0){if(onBleConnectListener ! null){onBleConnectListener.onDisConnectSuccess(gatt,bluetoothDevice,status); //0正常断开 回调}}else if(status 8){//因为距离远或者电池无法供电断开连接// 已经成功发现服务if(onBleConnectListener ! null){onBleConnectListener.onDisConnectSuccess(gatt,bluetoothDevice,status); //8断电断开 回调}}else if(status 34){if(onBleConnectListener ! null){onBleConnectListener.onDisConnectSuccess(gatt,bluetoothDevice,status); //34断开}}else {//其它断开连接if(onBleConnectListener ! null){onBleConnectListener.onDisConnectSuccess(gatt,bluetoothDevice,status); //其它断开}}}else if(newState BluetoothGatt.STATE_CONNECTING){Log.d(TAG,正在连接...);if(onBleConnectListener ! null){onBleConnectListener.onConnecting(gatt,bluetoothDevice); //正在连接回调}}else if(newState BluetoothGatt.STATE_DISCONNECTING){Log.d(TAG,正在断开...);if(onBleConnectListener ! null){onBleConnectListener.onDisConnecting(gatt,bluetoothDevice); //正在断开回调}}}//发现服务Overridepublic void onServicesDiscovered(BluetoothGatt gatt, int status) {super.onServicesDiscovered(gatt, status);//移除发现服务超时mHandler.removeCallbacks(serviceDiscoverOutTimeRunnable);Log.d(TAG,移除发现服务超时);Log.d(TAG,发现服务);//获取特定服务及特征if(setupService(gatt,serviceUUID,readUUID,writeUUID)){if(onBleConnectListener ! null){onBleConnectListener.onServiceDiscoverySucceed(gatt,gatt.getDevice(),status); //成功发现服务回调}}else{if(onBleConnectListener ! null){onBleConnectListener.onServiceDiscoveryFailed(gatt,gatt.getDevice(),获取服务特征异常); //发现服务失败回调}}}}Overridepublic void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {super.onCharacteristicRead(gatt, characteristic, status);Log.d(TAG,读status: status);}//向蓝牙设备写入数据结果回调Overridepublic void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {super.onCharacteristicWrite(gatt, characteristic, status);if(characteristic.getValue() null){Log.e(TAG,characteristic.getValue() null);return;}//将收到的字节数组转换成十六进制字符串String msg TypeConversion.bytes2HexString(characteristic.getValue(),characteristic.getValue().length);if(status BluetoothGatt.GATT_SUCCESS){//写入成功Log.w(TAG,写入成功 msg);if(onBleConnectListener ! null){onBleConnectListener.onWriteSuccess(gatt,gatt.getDevice(),characteristic.getValue()); //写入成功回调}}else if(status BluetoothGatt.GATT_FAILURE){//写入失败Log.e(TAG,写入失败 msg);if(onBleConnectListener ! null){onBleConnectListener.onWriteFailure(gatt,gatt.getDevice(),characteristic.getValue(),写入失败); //写入失败回调}}else if(status BluetoothGatt.GATT_WRITE_NOT_PERMITTED){//没有权限Log.e(TAG,没有权限);}}//读取蓝牙设备发出来的数据回调Overridepublic void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {super.onCharacteristicChanged(gatt, characteristic);//接收数据byte[] bytes characteristic.getValue();Log.w(TAG,收到数据str: TypeConversion.bytes2HexString(bytes,bytes.length));if(onBleConnectListener ! null){onBleConnectListener.onReceiveMessage(gatt,gatt.getDevice(),characteristic,characteristic.getValue()); //接收数据回调}}Overridepublic void onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {super.onDescriptorRead(gatt, descriptor, status);}Overridepublic void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {super.onDescriptorWrite(gatt, descriptor, status);}Overridepublic void onReliableWriteCompleted(BluetoothGatt gatt, int status) {super.onReliableWriteCompleted(gatt, status);Log.d(TAG,onReliableWriteCompleted);}Overridepublic void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) {super.onReadRemoteRssi(gatt, rssi, status);if(status BluetoothGatt.GATT_SUCCESS){Log.w(TAG,读取RSSI值成功RSSI值 rssi ,status status);if(onBleConnectListener ! null){onBleConnectListener.onReadRssi(gatt,rssi,status); //成功读取连接的信号强度回调}}else if(status BluetoothGatt.GATT_FAILURE){Log.w(TAG,读取RSSI值失败status status);}}//修改MTU值结果回调Overridepublic void onMtuChanged(BluetoothGatt gatt, int mtu, int status) {super.onMtuChanged(gatt, mtu, status);///设置mtu值即bluetoothGatt.requestMtu()时触发提示该操作是否成功if(status BluetoothGatt.GATT_SUCCESS){ //设置MTU成功 //MTU默认取的是23当收到 onMtuChanged 后会根据传递的值修改MTU注意由于传输用掉3字节因此传递的值需要减3。//mtu - 3Log.w(TAG,设置MTU成功新的MTU值 (mtu-3) ,status status);if(onBleConnectListener ! null){onBleConnectListener.onMTUSetSuccess(设置后新的MTU值 (mtu-3) status status,mtu - 3); //MTU设置成功}}else if(status BluetoothGatt.GATT_FAILURE){ //设置MTU失败 Log.e(TAG,设置MTU值失败 (mtu-3) ,status status);if(onBleConnectListener ! null){onBleConnectListener.onMTUSetFailure(设置MTU值失败 (mtu-3) status status); //MTU设置失败}}}};/*** 通过蓝牙设备连接* param context 上下文* param bluetoothDevice 蓝牙设备* param outTime 连接超时时间* param onBleConnectListener 蓝牙连接监听者* return*/RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)public BluetoothGatt connectBleDevice(Context context, BluetoothDevice bluetoothDevice, long outTime,OnBleConnectListener onBleConnectListener){if(bluetoothDevice null){Log.e(TAG,addBLEConnectDevice--bluetoothDevice null);return null;}this.onBleConnectListener onBleConnectListener;this.curConnDevice bluetoothDevice;Log.d(TAG,开始准备连接 bluetoothDevice.getName() -- bluetoothDevice.getAddress());//出现 BluetoothGatt.android.os.DeadObjectException 蓝牙没有打开try{if(Build.VERSION.SDK_INT Build.VERSION_CODES.O){mBluetoothGatt bluetoothDevice.connectGatt(context, false, bluetoothGattCallback,BluetoothDevice.TRANSPORT_LE,BluetoothDevice.PHY_LE_1M_MASK);}else if (Build.VERSION.SDK_INT Build.VERSION_CODES.M) {mBluetoothGatt bluetoothDevice.connectGatt(context, false, bluetoothGattCallback,BluetoothDevice.TRANSPORT_LE);} else {mBluetoothGatt bluetoothDevice.connectGatt(context, false, bluetoothGattCallback);}}catch(Exception e){Log.e(TAG,e: e.getMessage());}mHandler.postDelayed(connectOutTimeRunnable,outTime);return mBluetoothGatt;}//连接超时private Runnable connectOutTimeRunnable new Runnable() {RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)Overridepublic void run() {if(mBluetoothGatt null){Log.e(TAG,connectOuttimeRunnable--mBluetoothGatt null);return;}isConnectIng false;mBluetoothGatt.disconnect();//连接超时当作连接失败回调if(onBleConnectListener ! null){onBleConnectListener.onConnectFailure(mBluetoothGatt,curConnDevice,连接超时,-1); //连接失败回调}}};//发现服务超时private Runnable serviceDiscoverOutTimeRunnable new Runnable() {RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)Overridepublic void run() {if(mBluetoothGatt null){Log.e(TAG,connectOuttimeRunnable--mBluetoothGatt null);return;}isConnectIng false;mBluetoothGatt.disconnect();//发现服务超时当作连接失败回调if(onBleConnectListener ! null){onBleConnectListener.onConnectFailure(mBluetoothGatt,curConnDevice,发现服务超时,-1); //连接失败回调}}}; 2发现系统服务之后还需要获取特定服务及读写特征才能进行数据通讯。 一般读特征是用来读取蓝牙设备发出来的数据写特征是向蓝牙设备写入数据其中读特征一定要设置打开通知否则接收不到消息。
/*** 获取特定服务及特征* 1个serviceUUID -- 1个readUUID -- 1个writeUUID* param bluetoothGatt* param serviceUUID* param readUUID* param writeUUID* return*/RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)private boolean setupService(BluetoothGatt bluetoothGatt,String serviceUUID,String readUUID,String writeUUID) {if (bluetoothGatt null) {Log.e(TAG, setupService()--bluetoothGatt null);return false;}if(serviceUUID null){Log.e(TAG, setupService()--serviceUUID null);return false;}for (BluetoothGattService service : bluetoothGatt.getServices()) {
// Log.d(TAG, service service.getUuid().toString());if (service.getUuid().toString().equals(serviceUUID)) {bluetoothGattService service;}}//通过上面方法获取bluetoothGattService
// bluetoothGattService bleManager.getBluetoothGattService(bluetoothGatt,ConsData.MY_BLUETOOTH4_UUID);if (bluetoothGattService null) {Log.e(TAG, setupService()--bluetoothGattService null);return false;}Log.d(TAG, setupService()--bluetoothGattService bluetoothGattService.toString());if(readUUID null || writeUUID null){Log.e(TAG, setupService()--readUUID null || writeUUID null);return false;}for (BluetoothGattCharacteristic characteristic : bluetoothGattService.getCharacteristics()) {if (characteristic.getUuid().toString().equals(readUUID)) { //读特征readCharacteristic characteristic;} else if (characteristic.getUuid().toString().equals(writeUUID)) { //写特征writeCharacteristic characteristic;}}if (readCharacteristic null) {Log.e(TAG, setupService()--readCharacteristic null);return false;}if (writeCharacteristic null) {Log.e(TAG, setupService()--writeCharacteristic null);return false;}//打开读通知enableNotification(true, bluetoothGatt, readCharacteristic);//重点中重点需要重新设置ListBluetoothGattDescriptor descriptors readCharacteristic.getDescriptors();for (BluetoothGattDescriptor descriptor : descriptors) {descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);bluetoothGatt.writeDescriptor(descriptor);}//延迟2s保证所有通知都能及时打开mHandler.postDelayed(new Runnable() {Overridepublic void run() {}}, 2000);return true;}// 打开通知/*** 设置读特征接收通知* param enable 为true打开通知* param gatt 连接* param characteristic 特征*/RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)public void enableNotification(boolean enable, BluetoothGatt gatt, BluetoothGattCharacteristic characteristic){if(gatt null){Log.e(TAG,enableNotification--gatt null);return;}if(characteristic null){Log.e(TAG,enableNotification--characteristic null);return;}//这一步必须要有否则接收不到通知gatt.setCharacteristicNotification(characteristic,enable);}
5、数据通讯 1发送数据 mBluetoothGatt.writeCharacteristic()方法的返回值并不能真正的表示数据是否发送成功而是通过BluetoothGattCallback回调方法onCharacteristicWrite()来判断数据是否已成功写入底层。 //向蓝牙设备写入数据结果回调Overridepublic void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {super.onCharacteristicWrite(gatt, characteristic, status);if(characteristic.getValue() null){Log.e(TAG,characteristic.getValue() null);return;}//将收到的字节数组转换成十六进制字符串String msg TypeConversion.bytes2HexString(characteristic.getValue(),characteristic.getValue().length);if(status BluetoothGatt.GATT_SUCCESS){//写入成功Log.w(TAG,写入成功 msg);if(onBleConnectListener ! null){onBleConnectListener.onWriteSuccess(gatt,gatt.getDevice(),characteristic.getValue()); //写入成功回调}}else if(status BluetoothGatt.GATT_FAILURE){//写入失败Log.e(TAG,写入失败 msg);if(onBleConnectListener ! null){onBleConnectListener.onWriteFailure(gatt,gatt.getDevice(),characteristic.getValue(),写入失败); //写入失败回调}}else if(status BluetoothGatt.GATT_WRITE_NOT_PERMITTED){//没有权限Log.e(TAG,没有权限);}}
/// 发送数据 ////*** 发送消息 byte[]数组* param msg 消息* return true false*/RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)public boolean sendMessage( byte[] msg){if(writeCharacteristic null){Log.e(TAG,sendMessage(byte[])--writeGattCharacteristic null);return false;}if(mBluetoothGatt null){Log.e(TAG,sendMessage(byte[])--mBluetoothGatt null);return false;}boolean b writeCharacteristic.setValue(msg);Log.d(TAG, 写特征设置值结果 b);return mBluetoothGatt.writeCharacteristic(writeCharacteristic);} 2接收数据 接收的数据是直接通过BluetoothGattCallback回调方法onCharacteristicChanged()来获取的。 //读取蓝牙设备发出来的数据回调Overridepublic void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {super.onCharacteristicChanged(gatt, characteristic);//接收数据byte[] bytes characteristic.getValue();Log.w(TAG,收到数据str: TypeConversion.bytes2HexString(bytes,bytes.length));if(onBleConnectListener ! null){onBleConnectListener.onReceiveMessage(gatt,gatt.getDevice(),characteristic,characteristic.getValue()); //接收数据回调}} 6、断开连接 BLE通讯结束之后需要及时断开连接,并且在断开连接的回调处释放资源。否则会导致下一次执行连接操作时导致133异常。所以一般连接出现133异常都是因为断开后及时释放资源。 断开连接的结果是在BluetoothGattCallback回调方法onConnectionStateChange()来获取的。可查看上面建立连接处的代码 /// 断开连接 ////*** 断开连接*/RequiresApi(api Build.VERSION_CODES.JELLY_BEAN_MR2)public void disConnectDevice(){if(mBluetoothGatt null){Log.e(TAG,disConnectDevice--bluetoothGatt null);return;}//系统断开mBluetoothGatt.disconnect();} 7、过程中遇到过的实际问题
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