的默认蓝牙名称为 Android Bluedroid

通过搜索你会找到如下文件 device/generic/common/bluetooth/bdroid_buildcfg.h

#ifndef _BDROID_BUILDCFG_H
#define _BDROID_BUILDCFG_H#define BTM_DEF_LOCAL_NAME   "Android Bluedroid"#endif

如果单一情况你修改此处即可，但如果多台烧录此 room 的设备同时打开蓝牙，你搜索到的蓝牙名称都为 BTM_DEF_LOCAL_NAME 对应的值

为了避免此种情况，我们采用另一种修改方式

将蓝牙名称修改为 你当前设备的 displayID,如果包含 _ ,则取 _ 之前的名称再加上 mac 地址的后六位

举个栗子， 设备 displayID 为 MTK6737-VT_V1.02 蓝牙mac地址为 EF:6D:3C:22:25:56， 则最终的蓝牙名称为 MTK6737-VT_222556

frameworks\base\core\java\android\bluetooth\BluetoothAdapter.java

 @RequiresPermission(Manifest.permission.BLUETOOTH_ADMIN)public boolean enable() {if (isEnabled()) {if (DBG) Log.d(TAG, "enable(): BT already enabled!");updateBleName();//cczheng addreturn true;}try {boolean enableResult = mManagerService.enable(ActivityThread.currentPackageName());if (enableResult) {updateBleName();//cczheng add}return enableResult /*mManagerService.enable(ActivityThread.currentPackageName())*/;} catch (RemoteException e) {Log.e(TAG, "", e);}return false;}/***  cczheng add updateBleName whenBluetooth enable*/private void updateBleName(){final String ctag = "ccz";final String bleName=getName();Log.e(ctag,".bleName:"+bleName);new Thread(){@Overridepublic void run() {super.run();int timeCounter=0;String macStr=null;while(timeCounter<20){//500 *20 =10,000 msmacStr=getAddress();if(TextUtils.isEmpty(macStr) || macStr.contains("00:00:00")){try { sleep(500); } catch (InterruptedException e) {}}else{break;}timeCounter++;}Log.e(ctag,".mac:"+macStr);if(!TextUtils.isEmpty(macStr) &&  !macStr.contains("00:00:00")){timeCounter=0;macStr = macStr.substring(macStr.length() - 8, macStr.length());macStr = macStr.replaceAll(":", "");String display = android.os.Build.DISPLAY;if (display.contains("_")){display = display.split("_")[0];}else{display = "BT";}String newBleName = display + "_" + macStr;Log.e(ctag,".newBleName:"+newBleName);if(!newBleName.equals(bleName)){if(bleName.equals("ANDROID BT")|| bleName.contains("Android Bluedroid")|| bleName.contains("BT")|| bleName.contains(display + "_")){try{while (mService == null || mService.getState() != STATE_ON) {try{ sleep(200); } catch (InterruptedException e){}timeCounter++;if (timeCounter > 20) {break;}}Log.e(ctag,".setbleName:"+newBleName);mService.setName(newBleName);}catch (RemoteException e){e.printStackTrace();}Log.e(ctag,".setbleNameFinished:"+newBleName);}}}}}.start();}