蓝牙BLE4.0接收广播App

package com.hy.ble.receive.helper; import android.annotation.SuppressLint; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothGatt; import android.bluetooth.BluetoothGattCallback; import android.bluetooth.BluetoothGattCharacteristic; import android.bluetooth.BluetoothGattDescriptor; import android.bluetooth.BluetoothGattService; import android.bluetooth.BluetoothProfile; import android.bluetooth.le.BluetoothLeScanner; import android.bluetooth.le.ScanCallback; import android.bluetooth.le.ScanFilter; import android.bluetooth.le.ScanResult; import android.bluetooth.le.ScanSettings; import android.content.Context; import android.content.pm.PackageManager; import android.os.Handler; import android.util.Log; import android.widget.Toast; import com.hy.ble.receive.base.Common; import com.hy.ble.receive.bean.BluetoothDeviceBean; import com.hy.ble.receive.utils.BleUtil; import java.util.ArrayList; import java.util.List; import java.util.Objects; /** * <pre> * author : Agg * blog : https://blog.csdn.net/Agg_bin * time : 2019/03/14 * desc : * * 1、是否有权限 * 2、是否支持蓝牙4.0 * 3、蓝牙是否开启 * 4、设备搜索 * 5、设备连接 * 6、蓝牙通信 * * reference : * 一个系列四篇文章：https://www.jianshu.com/p/dc67e6fe036b * 一系列几篇文章：http://a1anwang.com/post-47.html * </pre> */ public class BluetoothHelper { private static final String TAG = BluetoothHelper.class.getSimpleName(); @SuppressLint("StaticFieldLeak") private volatile static BluetoothHelper bluetoothHelper; private BluetoothAdapter bluetoothAdapter; private BluetoothLeScanner bluetoothLeScanner; private BluetoothGatt bluetoothGatt; // 作为中央来使用和处理数据 private Common.OnDeviceCallBack onDeviceCallBack; private BluetoothGattCharacteristic characteristicNotification; private Common.OnConnectDeviceCallBack onConnectDeviceCallBack; private Common.OnCloseActivity onCloseActivity; private Handler mainHandler; private Context context; private BluetoothHelper() { } public static BluetoothHelper getInstance() { if (bluetoothHelper == null) { synchronized (BluetoothHelper.class) { if (bluetoothHelper == null) { bluetoothHelper = new BluetoothHelper(); } } } return bluetoothHelper; } public void init(Context context) { this.context = context.getApplicationContext(); mainHandler = new Handler(); if (!context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) { mainHandler.post(() -> Toast.makeText(context, "蓝牙不支持BLE", Toast.LENGTH_SHORT).show()); onCloseActivity.onClose(); } else if (BluetoothAdapter.getDefaultAdapter() == null) { mainHandler.post(() -> Toast.makeText(context, "此设备不支持蓝牙", Toast.LENGTH_SHORT).show()); onCloseActivity.onClose(); } } public void openBluetooth() { bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); boolean enable = bluetoothAdapter.enable();// 自动打开蓝牙 if (!enable) { mainHandler.post(() -> Toast.makeText(context, "请打开蓝牙", Toast.LENGTH_SHORT).show()); onCloseActivity.onClose(); } } /** * 检测蓝牙是否已启用 * * @return 启用为true，未启用为false */ public boolean isEnabled() { return bluetoothAdapter != null && bluetoothAdapter.isEnabled(); } public void scanLeDevice() { // 参考：http://a1anwang.com/post-37.html if (bluetoothAdapter != null) { // 在10秒后停止搜索 mainHandler.postDelayed(() -> { if (bluetoothAdapter.isEnabled()) bluetoothLeScanner.stopScan(scanCallback); }, Common.SCAN_PERIOD); // 在广播字段里加入特定的server uuid， app扫描的时候可以过滤其他BLE设备。 bluetoothLeScanner = bluetoothAdapter.getBluetoothLeScanner(); bluetoothLeScanner.startScan(createScanFilter(), new ScanSettings.Builder().build(), scanCallback); } else { Log.i(TAG, "scanLeDevice: 蓝牙未初始化"); } } private List<ScanFilter> createScanFilter() { List<ScanFilter> scanFilters = new ArrayList<>(); scanFilters.add(new ScanFilter.Builder().setServiceUuid(Common.PARCEL_UUID_1).build()); scanFilters.add(new ScanFilter.Builder().setServiceUuid(Common.PARCEL_UUID_2).build()); return scanFilters; } public void stopScanLeDevice() { if (bluetoothLeScanner != null) { bluetoothLeScanner.stopScan(scanCallback); } else { Log.i(TAG, "scanLeDevice: 蓝牙未初始化"); } } private ScanCallback scanCallback = new ScanCallback() { @Override public void onScanResult(int callbackType, ScanResult result) { super.onScanResult(callbackType, result); // rssi：RSSI的值作为对远程蓝牙设备信号值，正常为负值; 值越大信号越强; // scanRecord：远程设备提供的配对号，一般用不到。 Log.i(TAG, "scanRecord: " + BleUtil.toHexString(Objects.requireNonNull(result.getScanRecord()).getBytes()) + ",address：" + result.getDevice().getAddress()); onDeviceCallBack.onItemClick(new BluetoothDeviceBean(result.getDevice(), result.getRssi())); } }; public void connectGatt(BluetoothDeviceBean deviceBean) { // 实测发现，用false连接比较好，比较快， true会等个十几秒甚至几分钟才会连接上。 开发过程中一般都是用false，扫描到bluetoothdevice之后，直接用false连接即可。 bluetoothGatt = deviceBean.getBluetoothDevice().connectGatt(context, false, bluetoothGattCallback); } // BluetoothGattCallback是返回中央的状态和周边提供的数据的一个重要的抽象类 private final BluetoothGattCallback bluetoothGattCallback = new BluetoothGattCallback() { /** * 当GATT客户端已连接到GATT服务器或者从GATT服务器断开连接 * 时回调。 * * @param gatt gatt * @param status 连接或断开操作的状态。BluetoothGatt.GATT_SUCCESS表示操作成功 * @param newState 返回新的连接状态。 如 BluetoothProfile.STATE_DISCONNECTED或BluetoothProfile.STATE_CONNECTED */ @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { super.onConnectionStateChange(gatt, status, newState); if (newState == BluetoothProfile.STATE_CONNECTED) { Log.i(TAG, "连接成功"); onConnectDeviceCallBack.onConnect(gatt.getDevice()); // 查找服务,在成功连接到远程设备时调用，不调用此方法，无法与远程设备进行后续的通信。 // 但是这个方法是异步操作，在回调函数onServicesDiscovered中得到status，通过判断status是否等于BluetoothGatt.GATT_SUCCESS来判断查找Service是否成功. gatt.discoverServices(); // 有可能自动重连 // bluetoothGatt = gatt; } else if (newState == BluetoothProfile.STATE_DISCONNECTED) { Log.i(TAG, "连接断开"); gatt.connect(); } } /** * 当远程设备的远程服务列表，特征和描述符已被更新，即已发现新服务时，�