Android搜索附近的beacon

本文主要是介绍Android搜索附近的beacon，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

定义一个service用来搜索beacon

import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;import java.text.DecimalFormat;
import java.util.HashMap;
import java.util.Map;public class IbeaconService extends Service {static final char[] hexArray = "0123456789ABCDEF".toCharArray();private final static String Target_UUID = "你的uuid";//过滤搜索的beacon本程序中暂未使用到BluetoothManager bluetoothManager;BluetoothAdapter  mBluetoothAdapter;public IbeaconService() {}@Overridepublic void onCreate() {super.onCreate();bluetoothManager = (BluetoothManager) getApplication().getSystemService(Context.BLUETOOTH_SERVICE);mBluetoothAdapter = bluetoothManager.getAdapter();}@Overridepublic IBinder onBind(Intent intent) {// TODO: Return the communication channel to the service.throw new UnsupportedOperationException("Not yet implemented");}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {Log.d("tag","ibeacon service startLeScan");if(mBluetoothAdapter!=null){mBluetoothAdapter.startLeScan(mLeScanCallback);}return super.onStartCommand(intent, flags, startId);}@Overridepublic void onDestroy() {super.onDestroy();Log.d("tag", "stopScanningForBeacons");if (mBluetoothAdapter != null) {mBluetoothAdapter.stopLeScan(mLeScanCallback);}}private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {@Overridepublic void onLeScan(final BluetoothDevice device, final int rssi,final byte[] scanRecord) {int startByte = 2;boolean patternFound = false;// 寻找ibeaconwhile (startByte <= 5) {if (((int) scanRecord[startByte + 2] & 0xff) == 0x02 && // Identifies an iBeacon((int) scanRecord[startByte + 3] & 0xff) == 0x15) { // Identifies  correct  data  lengthpatternFound = true;break;}startByte++;}// 如果找到了的话if (patternFound) {// 转换为16进制byte[] uuidBytes = new byte[16];System.arraycopy(scanRecord, startByte + 4, uuidBytes, 0, 16);String hexString = bytesToHex(uuidBytes);// ibeacon的UUID值String uuid = hexString.substring(0, 8) + "-"+ hexString.substring(8, 12) + "-"+ hexString.substring(12, 16) + "-"+ hexString.substring(16, 20) + "-"+ hexString.substring(20, 32);// ibeacon的Major值int major = (scanRecord[startByte + 20] & 0xff) * 0x100+ (scanRecord[startByte + 21] & 0xff);// ibeacon的Minor值int minor = (scanRecord[startByte + 22] & 0xff) * 0x100+ (scanRecord[startByte + 23] & 0xff);String ibeaconName = device.getName();String mac = device.getAddress();int txPower = (scanRecord[startByte + 24]);Log.d("BLE", bytesToHex(scanRecord));Log.d("BLE", "Name：" + ibeaconName + "\nMac：" + mac+ " \nUUID：" + uuid + "\nMajor：" + major + "\nMinor："+ minor + "\nTxPower：" + txPower + "\nrssi：" + rssi);Log.d("BLE", "distance：" + calculateAccuracy(txPower, rssi));DecimalFormat df = new DecimalFormat("#.##");String distance=df.format(calculateAccuracy(txPower, rssi));//将距离保留两位小数String sfsdf = "BLE:" + bytesToHex(scanRecord) + "\n" + "Name：" + ibeaconName + "\nMac：" + mac+ " \nUUID：" + uuid + "\nMajor：" + major + "\nMinor："+ minor + "\nTxPower：" + txPower + "\nrssi：" + rssi + "\n" + "DOUBLE distance：" + calculateAccuracy(txPower, rssi)+ "distance：" + distance;//    Log.d("tag","sfsdf="+sfsdf);//    Log.d("tag","Name：" + ibeaconName + "\nMac：" + mac +" \nUUID：" + uuid + "\nMajor：" + major + "\nMinor："+ minor + "\ndistance：" + distance);}}};private static String bytesToHex(byte[] bytes) {char[] hexChars = new char[bytes.length * 2];for (int j = 0; j < bytes.length; j++) {int v = bytes[j] & 0xFF;hexChars[j * 2] = hexArray[v >>> 4];hexChars[j * 2 + 1] = hexArray[v & 0x0F];}return new String(hexChars);}protected static double calculateAccuracy(int txPower, double rssi) {if (rssi == 0) {return -1.0; // if we cannot determine accuracy, return -1.}double ratio = rssi * 1.0 / txPower;if (ratio < 1.0) {return Math.pow(ratio, 10);} else {double accuracy = (0.89976) * Math.pow(ratio, 7.7095) + 0.111;return accuracy;}}
}

在activity中调用

secarchIbeacon();

    /**** 搜索iBeacon*/public void secarchIbeacon(){Log.d("tag", "start secarchIbeacon()");BluetoothManager mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);//获取此设备的默认蓝牙适配器。BluetoothAdapter mBluetoothAdapter = mBluetoothManager.getAdapter();if(mBluetoothAdapter!=null) {if (mBluetoothAdapter.isEnabled()) {Log.d("tag", "mBluetoothAdapter is enabled");Intent startIntent = new Intent(MainActivity.this, IbeaconService.class);startService(startIntent);}} else {//开启蓝牙Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);startActivityForResult(enableBluetooth, 1);}}}

题外话:调用service前可以判断当前service是否正在运行

    //判断service是否正在运行private boolean isServiceRunning(String serviceName) {ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);for (ActivityManager.RunningServiceInfo runningService : manager.getRunningServices(Integer.MAX_VALUE)) {if (serviceName.equals(runningService.service.getClassName())) {return true;}}return false;}

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