在 Android (API 30) 中以编程方式连接到特定的 wifi 网络

Question

目的 尝试在没有任何人为干预（用户名和密码除外）的情况下连接或切换到特定的 WiFi 网络。

代码片段

MainActivity.kt

类 MainActivity : AppCompatActivity() {

private var lastSuggestedNetwork:WifiNetworkSuggestion? = null
var wifiManager:WifiManager? = null

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    wifiManager = applicationContext.getSystemService(WIFI_SERVICE) as WifiManager
    val button = findViewById<Button>(R.id.button) // Just a button in the layout file
    button.setOnClickListener(View.OnClickListener {
        wifiManager!!.disconnect()
        connectUsingNetworkSuggestion(ssid = "AndroidWifi", password ="")
        wifiManager!!.reconnect()
    })
}

private fun connectUsingNetworkSuggestion(ssid: String, password: String) {
    val wifiNetworkSuggestion = WifiNetworkSuggestion.Builder()
        .setSsid(ssid)
        .setWpa2Passphrase(password)
        .build()
    val intentFilter =
        IntentFilter(WifiManager.ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION);

    val broadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            if (!intent.action.equals(WifiManager.ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION)) {
                return
            }
            showToast("Connection Suggestion Succeeded")
        }
    }


    registerReceiver(broadcastReceiver, intentFilter)

    lastSuggestedNetwork?.let {
        val status = wifiManager!!.removeNetworkSuggestions(listOf(it))
        Log.i("WifiNetworkSuggestion", "Removing Network suggestions status is $status")
    }
    val suggestionsList = listOf(wifiNetworkSuggestion)

    var status = wifiManager!!.addNetworkSuggestions(suggestionsList)
    Log.i("WifiNetworkSuggestion", "Adding Network suggestions status is $status")
    if (status == WifiManager.STATUS_NETWORK_SUGGESTIONS_ERROR_ADD_DUPLICATE) {
        showToast("Suggestion Update Needed")
        status = wifiManager!!.removeNetworkSuggestions(suggestionsList)
        Log.i("WifiNetworkSuggestion", "Removing Network suggestions status is $status")
        status = wifiManager!!.addNetworkSuggestions(suggestionsList)
    }
    if (status == WifiManager.STATUS_NETWORK_SUGGESTIONS_SUCCESS) {
        lastSuggestedNetwork = wifiNetworkSuggestion
        showToast("Suggestion Added")
    }
}

private fun showToast(s: String) {
    Toast.makeText(applicationContext, s, Toast.LENGTH_LONG).show()
}

}

AndroidManifest.xml 权限

 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>

使用此代码，设备可以连接到 WiFi 网络，但需要手动关闭和打开 WiFi。必须有更好的方式连接或切换到特定的 WiFi 网络，无需任何手动操作。

当前进程：

1. 运行应用程序并单击主屏幕上的按钮以连接到 WiFi。
2. 转到设置，禁用和启用 WiFi
3. 设备已连接到所需的 WiFi 网络

输出 https://i.stack.imgur.com/zQ7Bo.png

意图： 摆脱第 2 步/以编程方式进行操作

参考：参考：Is it possible to add a network configuration on Android Q?

为了明确一点，这段代码sn-p中提到的ssid和密码是默认AVD的，只需将其更改为任何其他WiFi网络的SSID和密码，它可以在物理设备上使用。我在 Pixel 3XL 上尝试过同样的问题。

Answer 1

您可以使用新的Settings.Panel (API 29+) 或旧的Settings API 轻轻地要求您的用户打开 wifi。此外，您可以使用startActivityForResult() 来检查用户是否确实从“设置”中打开了 Wifi。

if(!wifiManager.isWifiEnabled()) {
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        startActivity(new Intent(Settings.Panel.ACTION_WIFI));
    } else {
        // Use a full page activity - if Wifi is critcal for your app
        startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
        // Or use the deprecated method
        wifiManager.setWifiEnabled(true)
    }
} 

Answer 2

注意：此方法仅适用于您不针对 Android Q (API 29) 及更高版本。

而且没有办法使启用过程自动化。

启用

    public void EnableWiFi(){
      wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
      wifiManager.setWifiEnabled(true);
   }

禁用

 public void DisableWiFi(){
      wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
      wifiManager.setWifiEnabled(false);
   }