Android实现蓝牙远程连接遇到的问题

主要问到的问题:1.uuid获取不到，一直为空，后来发现android4.2之前使用uuid这种方法，目前尽量不使用uuid方式

2.socket.connect()出错，报read failed, socket might closed or timeout, read ret: -1；这个错，解觉方法就是另开一个子线程  专门执行socket.connect()方法

源码：

package com.example.testopencv.client;

import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.content.Intent;
import android.os.ParcelUuid;
import android.util.Log;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.UUID;

public class ConnThread extends Thread {

    private BluetoothDevice device;
    private BluetoothSocket socket;
    private Context mContext;
    public ConnThread(BluetoothDevice device) {
        this.device = device;
        System.out.println(device.getBluetoothClass()+"这里要连接");
       // UUID uuid = device.getUuids()[0].getUuid();
        //System.out.println(uuid+"这是uuid");

        try {
            socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        try {
            //java.io.IOException: Service discovery failed
            // 连接蓝牙服务端
            socket.connect();
            // 发送内容
            socket.getOutputStream().write(new String("Hello").getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}

效果：

参考文章：蓝牙通信的坑，read failed, socket might closed or timeout, read ret: -1_bobo丶仔_新浪博客 (sina.com.cn)