MainActivity.java
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package com.metroapp;
import android.annotation.TargetApi;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.Toast;
import com.facebook.react.ReactActivity;
import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.WritableMap;
import com.metroapp.bean.ScanResultBean;
import com.metroapp.nativemodules.BluetoothModule;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends ReactActivity {
/**
* Returns the name of the main component registered from JavaScript.
* This is used to schedule rendering of the component.
*/
@Override
protected String getMainComponentName() {
return "metroApp";
}
// 本地蓝牙适配器
private BluetoothAdapter mBluetoothAdapter;
private static ScanResultBean scanResultBean = null;
private static MainActivity _this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
_this = this;
initBluetooth();
startTimer(10*1000);
}
@TargetApi(22)
public void initBluetooth(){
BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);//这里与标准蓝牙略有不同
mBluetoothAdapter = bluetoothManager.getAdapter();
if (mBluetoothAdapter == null){
Toast.makeText(MainActivity.this,"该手机暂无蓝牙设备",Toast.LENGTH_SHORT).show();
return;
}
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {//小于18
Toast.makeText(MainActivity.this,"该手机暂不支持蓝牙4.0",Toast.LENGTH_SHORT).show();
return;
}
if (!mBluetoothAdapter.isEnabled()) {
mBluetoothAdapter.enable();
}
mBluetoothAdapter.startLeScan(mLeScanCallback);
}
private static int lastRSS =-9999;//上一个rss值
private static String UUID ="E2C56DB5-DFFB-48D2-B060-D0F5A71096E0";
private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, final int rssi,
final byte[] scanRecord) {
int startByte = 4;
String scanRecordhex=bytesToHex(scanRecord);
String hexString = scanRecordhex.substring(18,50);
// 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);
int major = Integer.valueOf(scanRecordhex.substring(50,54),16);
int minor = Integer.valueOf(scanRecordhex.substring(54,58),16);
String ibeaconName = device.getName()==null?"null":device.getName();
String mac = device.getAddress();
int txPower = (scanRecord[startByte + 24]);
if (uuid.equalsIgnoreCase(UUID)){//扫描到了
if (rssi >=lastRSS){
if (scanResultBean == null){
scanResultBean = new ScanResultBean();
}
scanResultBean.setDeviceCode(uuid+"|"+major+"|"+minor);
scanResultBean.setRss(rssi+"");
lastRSS = rssi;
}
}
}
};
static final char[] hexArray = "0123456789ABCDEF".toCharArray();
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);
}
private static Timer timer = new Timer();
private static Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
// 要做的事情
super.handleMessage(msg);
if (msg.what == 1){
if (scanResultBean ==null){
scanResultBean = new ScanResultBean();
scanResultBean.setRss("");
scanResultBean.setDeviceCode("");
}
WritableMap et= Arguments.createMap();
System.out.println("===>deviceCode"+scanResultBean.getDeviceCode());
et.putString("deviceCode",scanResultBean.getDeviceCode());
et.putString("rss",scanResultBean.getRss());
BluetoothModule.sendEvent("BlueToolData",et);
resetData();
}
}
};
public static void resetData(){
lastRSS =-9999;
scanResultBean = null;
}
/**
* 开启定时器
* @param period
*/
public static void startTimer(long period){
if (timer ==null){
timer = new Timer();
}
timer.schedule(task, 0, period);
}
/**
* 关闭定时器
*/
public static void stopTimer(){
if (timer !=null){
timer.cancel();
}
}
private static TimerTask task = new TimerTask() {
@Override
public void run() {
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
}