Unity Android 之 获取蓝牙Bluetooth 的状态，设置的蓝牙Bluetooth 的开关状态，并监听蓝牙Bluetooth 的状态变化方法整理

目录

Unity Android 之 获取蓝牙Bluetooth 的状态，设置的蓝牙Bluetooth 的开关状态，并监听蓝牙Bluetooth 的状态变化方法整理

一、简单介绍

二、实现原理

三、注意事项

四、效果预览

五、实现步骤

Android 端：

Unity 端

六、关键代码

Android 端

Unity 端

一、简单介绍

Unity Android 开发上会用到的技术简单整理，方便自己日后查看，能帮助到大家就更好了。

本节介绍，Unity 开发中，把从 Android 获取手机设备的蓝牙Bluetooth的状态，并设置蓝牙Bluetooth开关，监听蓝牙Bluetooth的状态变化的方法整理封装给Unity调用，方法不唯一，欢迎指正。

二、实现原理

1、获取蓝牙适配器 BluetoothAdapter.getDefaultAdapter()

2、bluetoothAdapter.isEnabled() 获取蓝牙的状态

3、bluetoothAdapter.enable()/bluetoothAdapter.disable() 设置蓝牙开关状态

4、使用广播监听 BluetoothAdapter.ACTION_STATE_CHANGED 蓝牙状态变化

5、打包成 aar ，Unity 调用 aar 的封装好的接口

三、注意事项

1、添加蓝牙权限

四、效果预览

五、实现步骤

Android 端：

1、新建一个Android Library 模块，其他默认设置就好

2、在模块中新建两个脚本，BluetoothStateUtil 封装各个功能，BluetoothStateInterface 一个接口函数，蓝牙状态变化的接口

3、脚本编辑 OK，Build - Make Module ‘xxxx’，打包 aar

4、打包成功，build 文件夹outputs/aar中就会 有对应的 aar 生成

Unity 端

1、把 Android 打包的 aar 导入 Unity

2、在场景中布局UI，Toggle 显示设置 蓝牙状态

3、在 Unity工程中，新建脚本，编辑对应功能

4、把 TestBluetoothStateWrapper 挂载到场景中，并对应赋值

5、运行场景，没有问题，即可打包到真机上测试

6、真机上的测试效果如上

六、关键代码

Android 端

1、BluetoothStateUtil

package com.example.bluetoothstatewrapper;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.widget.Toast;
public class BluetoothStateUtil {
    private static final String TAG = "Main_BluetoothStateUtil";
    private BluetoothAdapter bluetoothAdapter;
    private BluetoothStateBroadcastReceive mReceive;
    private Context mContext;
    private BluetoothStateInterface mBluetoothStateInterface;
    /**
     * 初始化
     */
    public void Init(BluetoothStateInterface bluetoothStateInterface){
        // 获得蓝牙适配器对象
        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        mContext = getActivity();
        mBluetoothStateInterface = bluetoothStateInterface;
    }
    /**
     * 获取蓝牙状态
     * @return
     */
    public boolean getBlueToothState() {
        // 获取蓝牙状态
        return bluetoothAdapter.isEnabled();
    }
    /**
     * 开启蓝牙
     * @return
     */
    public boolean openBlueTooth() {
        if (getBlueToothState()) return true;
        // 打开蓝牙
        return bluetoothAdapter.enable();
    }
    /**
     * 关闭蓝牙
     * @return
     */
    public boolean colseBlueTooth() {
        if (!getBlueToothState()) return true;
        // 关闭蓝牙
        return bluetoothAdapter.disable();
    }
    // 调用系统的请求打开蓝牙
    public void gotoSystem(Context context){
        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        context.startActivity(intent);
    }
    /**
     * 注册监听蓝牙变化
     */
    public void registerBluetoothReceiver(){
        if(mReceive == null){
            mReceive = new BluetoothStateBroadcastReceive();
        }
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
        intentFilter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
        intentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
        intentFilter.addAction("android.bluetooth.BluetoothAdapter.STATE_OFF");
        intentFilter.addAction("android.bluetooth.BluetoothAdapter.STATE_ON");
        mContext.registerReceiver(mReceive, intentFilter);
    }
    /**
     * 取消监听蓝牙变化
     */
    public void unregisterBluetoothReceiver(){
        if(mReceive != null){
            mContext.unregisterReceiver(mReceive);
            mReceive = null;
        }
    }
    /**
     * 蓝牙状态变化监听
     */
    class BluetoothStateBroadcastReceive extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            switch (action){
                case BluetoothDevice.ACTION_ACL_CONNECTED:
                    //Toast.makeText(context , "蓝牙设备:" + device.getName() + "已连接", Toast.LENGTH_SHORT).show();
                    Log.i(TAG, "onReceive: "+"蓝牙设备:" + device.getName() + "已连接");
                    break;
                case BluetoothDevice.ACTION_ACL_DISCONNECTED:
                    //Toast.makeText(context , "蓝牙设备:" + device.getName() + "已断开", Toast.LENGTH_SHORT).show();
                    Log.i(TAG, "onReceive: "+"蓝牙设备:" + device.getName() + "已断开");
                    break;
                case BluetoothAdapter.ACTION_STATE_CHANGED:
                    int blueState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0);
                    switch (blueState){
                        case BluetoothAdapter.STATE_OFF:
                            //Toast.makeText(context , "蓝牙已关闭", Toast.LENGTH_SHORT).show();
                            Log.i(TAG, "onReceive: "+"蓝牙已关闭:" );
                            mBluetoothStateInterface.onBluetoothStateOFF();
                            break;
                        case BluetoothAdapter.STATE_ON:
                            //Toast.makeText(context , "蓝牙已开启"  , Toast.LENGTH_SHORT).show();
                            Log.i(TAG, "onReceive: "+"蓝牙已开启:");
                            mBluetoothStateInterface.onBluetoothStateON();
                            break;
                    }
                    break;
            }
        }
    }
    // 设置一个 Activity 参数
    private Activity _unityActivity;
    // 通过反射获取 Unity 的 Activity 的上下文
    Activity getActivity(){
        if(null == _unityActivity){
            try{
                Class<?> classtype = Class.forName("com.unity3d.player.UnityPlayer");
                Activity activity = (Activity) classtype.getDeclaredField("currentActivity").get(classtype);
                _unityActivity = activity;
            }catch (ClassNotFoundException e){
                e.printStackTrace();
            }catch (IllegalAccessException e){
                e.printStackTrace();
            }catch (NoSuchFieldException e){
                e.printStackTrace();
            }
        }
        return _unityActivity;
    }
}

2、BluetoothStateInterface

package com.example.bluetoothstatewrapper;
public interface BluetoothStateInterface {
    void onBluetoothStateON();
    void onBluetoothStateOFF();
}

3、AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bluetoothstatewrapper" >
    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
</manifest>

Unity 端

1、BluetoothStateWrapper

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace AndroidWrapper { 
    /// <summary>
    /// 蓝牙状态封装
    /// 使用说明
    /// 1、首先初始化，绑定监听事件
    /// 2、可获取蓝牙状态，设置蓝牙状态
    /// 3、获得监听结果
    /// </summary>
    public class BluetoothStateWrapper : MonoSingleton<BluetoothStateWrapper>
    {
        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="VoiceVolumnChangedListener"></param>
        public void Init(Action OnBluetoothStateONListener, Action OnBluetoothStateOFFListener)
        {
#if UNITY_EDITOR
#else
            MAndroidJavaObject.Call("Init",new BluetoothStateInterface(OnBluetoothStateONListener, OnBluetoothStateOFFListener));
            registerBluetoothReceiver();
#endif
        }
        /// <summary>
        /// 获得蓝牙状态
        /// </summary>
        /// <returns></returns>
        public bool getBlueToothState()
        {
            return MAndroidJavaObject.Call<bool>("getBlueToothState");
        }
        /// <summary>
        /// 开启蓝牙
        /// </summary>
        /// <returns></returns>
        public bool openBlueTooth()
        {
            return MAndroidJavaObject.Call<bool>("openBlueTooth");
        }
        /// <summary>
        /// 关闭蓝牙
        /// </summary>
        /// <returns></returns>
        public bool colseBlueTooth()
        {
            return MAndroidJavaObject.Call<bool>("colseBlueTooth");
        }
#region 私有方法
        /// <summary>
        /// 注册蓝牙状态监听
        /// </summary>
        void registerBluetoothReceiver()
        {
            MAndroidJavaObject.Call("registerBluetoothReceiver");
        }
        /// <summary>
        /// 取消注册蓝牙状态监听
        /// </summary>
        void unregisterBluetoothReceiver()
        {
            MAndroidJavaObject.Call("unregisterBluetoothReceiver");
        }
        protected override void OnDestroy()
        {
            unregisterBluetoothReceiver();
            base.OnDestroy();
        }
#endregion
#region 私有变量
        AndroidJavaObject _mAndroidJavaObject;
        public AndroidJavaObject MAndroidJavaObject
        {
            get
            {
                if (_mAndroidJavaObject == null)
                {
                    _mAndroidJavaObject = new AndroidJavaObject("com.example.bluetoothstatewrapper.BluetoothStateUtil");
                }
                return _mAndroidJavaObject;
            }
        }
#endregion
    }
}

2、BluetoothStateInterface

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace AndroidWrapper
{
    /// <summary>
    /// 蓝牙状态监听接口
    /// </summary>
    public class BluetoothStateInterface : AndroidJavaProxy
    {
        /// <summary>
        /// 蓝牙变化委托事件
        /// </summary>
        Action _mBluetoothStateON;
        Action _mBluetoothStateOFF;
        public BluetoothStateInterface(Action mBluetoothStateON, Action mBluetoothStateOFF) : base("com.example.bluetoothstatewrapper.BluetoothStateInterface")
        {
            _mBluetoothStateON = mBluetoothStateON;
            _mBluetoothStateOFF = mBluetoothStateOFF;
        }
        /// <summary>
        /// 蓝牙打开事件监听
        /// </summary>
        public void onBluetoothStateON()
        {
            if (_mBluetoothStateON != null)
            {
                _mBluetoothStateON();
            }
            Debug.Log(GetType() + "/onBluetoothStateON()/ 蓝牙开启事件");
        }
        /// <summary>
        /// 蓝牙关闭事件监听
        /// </summary>
        public void onBluetoothStateOFF()
        {
            if (_mBluetoothStateOFF != null)
            {
                _mBluetoothStateOFF();
            }
            Debug.Log(GetType() + "/onBluetoothStateOFF()/ 蓝牙关闭事件");
        }
    }
}

3、TestBluetoothStateWrapper

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using AndroidWrapper;
using UnityEngine.UI;
public class TestBluetoothStateWrapper : MonoBehaviour
{
    public Toggle BTState_Toggle;
    // Start is called before the first frame update
    void Start()
    {
        BluetoothStateWrapper.Instance.Init(SetOnToggle, SetOffToggle);
        InitToggle();
    }
    /// <summary>
    /// 初始化
    /// </summary>
    void InitToggle() {
#if UNITY_EDITOR
        // 获取当前状态
        SetIsOnToggle(Random.Range(0,2) ==0 ? false:true);
        // 设置监听事件
        BTState_Toggle.onValueChanged.AddListener((isOn) => {
        });
#else
        // 获取当前状态
        SetIsOnToggle(BluetoothStateWrapper.Instance.getBlueToothState());
        // 设置监听事件
        BTState_Toggle.onValueChanged.AddListener((isOn)=> {
            if (isOn == true)
            {
                BluetoothStateWrapper.Instance.openBlueTooth();
            }
            else {
                BluetoothStateWrapper.Instance.colseBlueTooth();
            }
        });
#endif
    }
    void SetOnToggle() {
        SetIsOnToggle(true);
    }
    void SetOffToggle()
    {
        SetIsOnToggle(false);
    }
    void SetIsOnToggle(bool isOn) {
        BTState_Toggle.isOn = isOn;
    }
}

4、MonoSingleton

using UnityEngine;
public abstract class MonoSingleton<T> : MonoBehaviour where T : MonoBehaviour
{
    private static T instance = null;
    private static readonly object locker = new object();
    private static bool bAppQuitting;
    public static T Instance
    {
        get
        {
            if (bAppQuitting)
            {
                instance = null;
                return instance;
            }
            lock (locker)
            {
                if (instance == null)
                {
                    instance = FindObjectOfType<T>();
                    if (FindObjectsOfType<T>().Length > 1)
                    {
                        Debug.LogError("不应该存在多个单例！");
                        return instance;
                    }
                    if (instance == null)
                    {
                        var singleton = new GameObject();
                        instance = singleton.AddComponent<T>();
                        singleton.name = "(singleton)" + typeof(T);
                        singleton.hideFlags = HideFlags.None;
                        DontDestroyOnLoad(singleton);
                    }
                    else
                        DontDestroyOnLoad(instance.gameObject);
                }
                instance.hideFlags = HideFlags.None;
                return instance;
            }
        }
    }
    protected virtual void Awake()
    {
        bAppQuitting = false;
    }
    protected virtual void OnDestroy()
    {
        bAppQuitting = true;
    }
}