Android搜索附近的beacon

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() {    }    @Override    public void onCreate() {        super.onCreate();        bluetoothManager = (BluetoothManager) getApplication().getSystemService(Context.BLUETOOTH_SERVICE);        mBluetoothAdapter = bluetoothManager.getAdapter();    }    @Override    public IBinder onBind(Intent intent) {        // TODO: Return the communication channel to the service.        throw new UnsupportedOperationException("Not yet implemented");    }    @Override    public 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);    }    @Override    public void onDestroy() {        super.onDestroy();        Log.d("tag", "stopScanningForBeacons");        if (mBluetoothAdapter != null) {            mBluetoothAdapter.stopLeScan(mLeScanCallback);        }    }    private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {        @Override        public void onLeScan(final BluetoothDevice device, final int rssi,                             final byte[] scanRecord) {            int startByte = 2;            boolean patternFound = false;            // 寻找ibeacon            while (startByte <= 5) {                if (((int) scanRecord[startByte + 2] & 0xff) == 0x02 && // Identifies an iBeacon                        ((int) scanRecord[startByte + 3] & 0xff) == 0x15) { // Identifies  correct  data  length                    patternFound = 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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