我正在做一个项目，不断给我一个以前配对设备的RSSI。我没有得到连续的结果

Question

这个项目应该不断地给我一个已经知道MAC地址的设备的RSSI。我做了2-3次RSSI，然后什么都没有。尽管我正在android手机上测试这个设备，但我可以绕过谷歌向我扔来的电池限制等。这个项目的目标设备将是一个根深蒂固的Android M设备。

这是我的密码：

 private final BroadcastReceiver broadcastReceiver=new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action=intent.getAction();

            if(BluetoothDevice.ACTION_FOUND.equals(action)){
                BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                String deviceName=device.getName();
                String deviceHardwareAddress=device.getAddress();
                int rssi=intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE);
                if(deviceHardwareAddress.equals(MAC)){
                    deviceFound=true;
                    bluetoothAdapter.cancelDiscovery();
                    Log.i("broadcastReceiver" , "device " + deviceName);
                    Log.i("broadcastReceiver" , "hard"  + deviceHardwareAddress);
                    Log.i("broadcastReceiver","Rssi "+rssi);
                    Log.i("broadcastReceiver","Paired Id "+MAC );
                    tv.setText(deviceName+"     "+rssi);
                    stringArrayList.add(String.valueOf(rssi));
                    arrayAdapter.notifyDataSetChanged();
                    deviceFound=false;
                    bluetoothAdapter.startDiscovery();
                }
                if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
                    if(deviceFound==false){
                        bluetoothAdapter.startDiscovery();
                    }
                }
            }

        }
    };

Answer 1

解决了！

只需将BroadcastReceiver分成两个部分就可以了。请不要在不了解发生了什么的情况下复制这个答案。这个代码会消耗大量的电池。我的项目允许这样做。它会有类似于持续供电的东西。它只在某些条件下运行。干杯!

  private final BroadcastReceiver broadcastReceiver1=new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action=intent.getAction();
            if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
                if(deviceFound==false) {
                    bluetoothAdapter.cancelDiscovery();
                    bluetoothAdapter.startDiscovery();
                }
            };
        }
    };
private final BroadcastReceiver broadcastReceiver=new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action=intent.getAction();

            if(BluetoothDevice.ACTION_FOUND.equals(action)){
                BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                String deviceName=device.getName();
                String deviceHardwareAddress=device.getAddress();
                int rssi=intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE);
                if(deviceHardwareAddress.equals(MAC)){
                    deviceFound=true;
                    bluetoothAdapter.cancelDiscovery();
                    Log.i("broadcastReceiver" , "device " + deviceName);
                    Log.i("broadcastReceiver" , "hard"  + deviceHardwareAddress);
                    Log.i("broadcastReceiver","Rssi "+rssi);
                    Log.i("broadcastReceiver","Paired Id "+MAC );
                    tv.setText(deviceName+"     "+rssi);
                    deviceFound=false;
                    bluetoothAdapter.startDiscovery();
                }
            }

        }
    };