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 add
            return 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(){
            @Override
            public void run() {
                super.run();
                int timeCounter=0;
                String macStr=null;
                while(timeCounter<20){//500 *20 =10,000 ms
                    macStr=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();
    }