使用Android kotlin 语言，适配Android12 版本，生成一个Fragment,实现WIFI展示列表和点击连接wifi的功能

好的，以下是实现步骤：

1. 在gradle文件中添加依赖

implementation 'androidx.fragment:fragment-ktx:1.3.6'
implementation 'androidx.recyclerview:recyclerview:1.2.1'
implementation 'com.google.android.material:material:1.4.0'

2. 创建Fragment

在项目的app/src/main/java目录下创建一个新的包名，例如：com.example.wifilist.fragment

然后在该包下创建一个新的Kotlin文件，例如：WifiListFragment.kt

在WifiListFragment.kt中编写代码如下：

class WifiListFragment : Fragment() {
    private lateinit var wifiManager: WifiManager
    private lateinit var recyclerView: RecyclerView
    private lateinit var wifiListAdapter: WifiListAdapter
    
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val view = inflater.inflate(R.layout.fragment_wifi_list, container, false)
        recyclerView = view.findViewById(R.id.recyclerView)
        wifiListAdapter = WifiListAdapter(requireContext())
        recyclerView.adapter = wifiListAdapter
        recyclerView.layoutManager = LinearLayoutManager(requireContext())
        return view
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        wifiManager = requireContext().applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
        if (!wifiManager.isWifiEnabled) {
            wifiManager.isWifiEnabled = true
        }
        val wifiScanReceiver = object : BroadcastReceiver() {
            override fun onReceive(context: Context, intent: Intent) {
                if (intent.action == WifiManager.SCAN_RESULTS_AVAILABLE_ACTION) {
                    val wifiList = wifiManager.scanResults
                    wifiListAdapter.updateList(wifiList)
                }
            }
        }
        requireContext().registerReceiver(wifiScanReceiver, IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION))
        wifiManager.startScan()
    }
}

3. 创建RecyclerView的Adapter

在项目的app/src/main/java目录下创建一个新的包名，例如：com.example.wifilist.adapter

然后在该包下创建一个新的Kotlin文件，例如：WifiListAdapter.kt

在WifiListAdapter.kt中编写代码如下：

class WifiListAdapter(private val context: Context) : RecyclerView.Adapter<WifiListAdapter.ViewHolder>() {
    private var wifiList = listOf<ScanResult>()

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(context).inflate(R.layout.item_wifi, parent, false)
        return ViewHolder(view)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val wifi = wifiList[position]
        holder.ssidTextView.text = wifi.SSID
        holder.signalTextView.text = "${wifi.level} dBm"
        holder.itemView.setOnClickListener {
            val wifiConfig = WifiConfiguration()
            wifiConfig.SSID = "\"${wifi.SSID}\""
            wifiConfig.preSharedKey = "\"${"password"}\""
            val wifiManager = context.applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
            val netId = wifiManager.addNetwork(wifiConfig)
            wifiManager.disconnect()
            wifiManager.enableNetwork(netId, true)
            wifiManager.reconnect()
        }
    }

    override fun getItemCount(): Int {
        return wifiList.size
    }

    fun updateList(wifiList: List<ScanResult>) {
        this.wifiList = wifiList
        notifyDataSetChanged()
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val ssidTextView: TextView = itemView.findViewById(R.id.ssidTextView)
        val signalTextView: TextView = itemView.findViewById(R.id.signalTextView)
    }
}

4. 创建WiFi列表项的布局文件

在项目的app/src/main/res/layout目录下创建一个新的布局文件，例如：item_wifi.xml

在item_wifi.xml中编写代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="16dp">

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical">

        <TextView
            android:id="@+id/ssidTextView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/signalTextView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="14sp"
            android:textColor="@android:color/darker_gray" />

    </LinearLayout>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Connect"
        android:textSize="18sp"
        android:textColor="@color/teal_200"
        android:textStyle="bold" />

</LinearLayout>

5. 创建WiFi列表Fragment的布局文件

在项目的app/src/main/res/layout目录下创建一个新的布局文件，例如：fragment_wifi_list.xml

在fragment_wifi_list.xml中编写代码如下：

<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

6. 将Fragment添加到Activity中

在项目的app/src/main/java目录下创建一个新的包名，例如：com.example.wifilist.activity

然后在该包下创建一个新的Kotlin文件，例如：MainActivity.kt

在MainActivity.kt中编写代码如下：

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        supportFragmentManager.beginTransaction().replace(R.id.container, WifiListFragment()).commit()
    }
}

7. 运行程序

在模拟器或真机上运行程序，即可展示WiFi列表，并且可以点击连接WiFi。