基于Android的蓝牙测距.zip

# 基于Android的蓝牙测距 ## 1.申请权限 <uses-permission android:name="android.permission.BLUETOOTH"/> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> - Android6.0+需要动态申请权限，详情见代码 ## 2.定义广播接收器 private BroadcastReceiver bluetoothReceive = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); Log.i(TAG, "onReceive: action " + action); if (ACTION_FOUND.equals(action)) { BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); if (device.getBondState() != BluetoothDevice.BOND_BONDED) { //封装设备对象 int rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI, Short.MIN_VALUE); String name = device.getName(); String mac = device.getAddress(); double dis = Math.abs(calculateDistance(61, rssi)); BluetoothDeviceBean deviceBean = new BluetoothDeviceBean(name, mac, dis, rssi); Log.i(TAG, "onReceive: 搜索到设备 " + deviceBean.toString()); //装入集合 bluetoothDevices.add(deviceBean); } } else if (ACTION_DISCOVERY_FINISHED.equals(action)) { Log.i(TAG, "onReceive: 搜索结束"); } } }; ## 3.注册广播 //当发现一个蓝牙设备时触发 registerReceiver(bluetoothReceive, new IntentFilter(ACTION_FOUND)); //当搜索蓝牙设备结束时触发 registerReceiver(bluetoothReceive, new IntentFilter(ACTION_DISCOVERY_FINISHED)); ## 4.申请蓝牙适配器 bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); ## 5.搜索蓝牙设备 private void seachBluetoothDevice() { //开个线程搜索蓝牙设备 new Thread(() -> { bluetoothAdapter.startDiscovery(); Log.i(TAG, "seachBluetoothDevice: 开始搜索蓝牙设备"); }).start(); Intent intent = new Intent(); intent.setAction("com.example.testdistincebyandroidbluetooth"); intent.setPackage("com.example.testdistincebyandroidbluetooth"); sendBroadcast(intent); //10S后停止扫描蓝牙 handler.sendEmptyMessageDelayed(0, 1000 * 10); }