android studio 关于BroadcastReceiver的问题，可以收到但是收到的数据直是null

//注册一个广播接收器
        IntentFilter TcpFilter = new IntentFilter();
        TcpFilter.addAction("action.JBBUI");
        broadcastReceiver = new JBBUIBroadcastReceiver();
        registerReceiver(broadcastReceiver,TcpFilter);

private class JBBUIBroadcastReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {
            Intent Recvintent = getIntent();
            String action = intent.getAction();
            byte[] AreaCmd = {};
            String str;
            if("action.JBBUI".equals(action)){
                AreaCmd = Recvintent.getByteArrayExtra("JBBCmd");//这里收到的数据AreaCmd 一致显示null
            }
            //Toast.makeText(jiboba.this,"收到指令",Toast.LENGTH_SHORT).show();
            CmdAnalysis(AreaCmd);
        }
    }

广播是从tcpservice发过来的

//发送广播到activity
    public void SendCMD(String str,byte[] cmd){
        final Intent intent = new Intent();
        //先判断指令属于哪一种设备
        if((cmd[3] == (byte) 0x01) && (cmd[4] == (byte) 0x0B) && (cmd[5] == (byte) 0x05)){
            intent.setAction("action.JBBUI");
            intent.putExtra("JBBCmd",cmd);//这里的cmd是有数据的
            sendBroadcast(intent);
        }else if((cmd[3] == (byte) 0x01) && (cmd[4] == (byte) 0x07) && (cmd[5] == (byte) 0x05)){
            intent.setAction("action.updateUI");
            intent.putExtra("GoalCmd",cmd);
            sendBroadcast(intent);
        }
    }

我怀疑你没收到广播，把CmdAnalysis(AreaCmd);放到第10行下面就知道了，估计运行不到CmdAnalysis里面。