Android 使用FetchUUIDSWithDP（）防止友好名称缓存

定义：

我的非android设备NAD是一款蓝牙设备，它将名称从60循环到0，并以无限方式重置

目标： 我想做的是让我的android设备尽可能近距离地检测倒计时，并启动一个尽可能接近NAD计数器的警报

为此，我将设备的本机BluetoothAdapter手动启动查看，将此功能绑定到屏幕上的按钮，并通过广播接收器关注我设置的祝酒词，广播接收器更新屏幕上的文本视图，使我能够实时监控设备接收到的内容

要求： 在这种情况下，系统和资源效率不是一个问题

问题：请注意代码中的第1部分和第2部分 我不确定使用FetchUUIDSWITHDP对我有何帮助，因为它更新的TextView仍然为空，并且TextView由额外的\u名称填充，额外的意图返回操作\u名称\u更改的是缓存的初始发现名称，即，我的应用程序在初始发现后没有读取名称

我的代码可以在下面找到

对于新手犯的错误，我深表歉意，我正在尽最大努力：

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我曾参与过一个蓝牙项目，我认为发现过程应该是一个可以在后台注册的意图。要发现范围内的设备，只需调用BTDevice.startDiscovery来搜索它们。 通常，如果连续启用，startDiscovery会耗尽蓄电池电量。 如果你愿意，我可以编辑这篇文章来分享我用来扫描设备的狙击手。 希望这有帮助

    public class BTBroadcastReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {
            //pulling the action name from the broadcasted intent
            String action = intent.getAction();
            if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
                sToaster("StartedD");//show toast that Discovery has started

            }
            else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
                sToaster("EndedD");//show toast signifying end of discovery
                /*
                if(notfound){
                    mBTAdapter.startDiscovery();
                }*/
            }
            else if(BluetoothDevice.ACTION_FOUND.equals(action)){
                //when a device is found
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                //make sure it's indeed my NAD device by checking MAC address
                if(device.getAddress().equals(MACAddress)){
                    if(notfound){
                        //show device name on screen
                        sToaster("FOUND DEvice");
                        notfound = false;
                        NAD = device;
                        NameShower.setText(device.getName());
                    }
                    else{
                        //do nothing if it's the second time the device is found
                    }
                }
            }
            else if(BluetoothDevice.ACTION_NAME_CHANGED.equals(action)){
                //name changed
                BluetoothDevice foundDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                //make sure it's indeed my NAD device
                if(foundDevice.equals(NAD)){
                    sToaster("Name Change!"); //show on screen that the name change intent has been caught

                    //PART1
                    //to prevent caching of the old device name StackOverflow article 
                    //advised using this function i don't totally understand yet
                    //NAD.fetchUuidsWithSdp();
                    //either commented or not commented the outcome is the same (no refresh of the name)



                    //PART2
                    //tried showing the new name two different ways below, neither of which are effective
                    //by inspecting the TextViews on-screen
                    NameShower.setText(foundDevice.getName());
                    EventView.setText(intent.getStringExtra(BluetoothDevice.EXTRA_NAME));
                    }
                }
            }

    };