st_android/app/src/main/java/com/example/mylauncher/WifiNetworkCallback.java


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package com.example.mylauncher;

import android.net.ConnectivityManager;
import android.net.Network;
import android.net.ConnectivityManager.NetworkCallback;
import android.os.Build;
import android.widget.Toast;

public class WifiNetworkCallback extends NetworkCallback {
    private final String ssid;
    private final ConnectivityManager connectivityManager;
    private final MainActivity mainActivity;

    public WifiNetworkCallback(MainActivity activity, String ssid, ConnectivityManager connectivityManager) {
        this.ssid = ssid;
        this.connectivityManager = connectivityManager;
        this.mainActivity = activity;
    }

    @Override
    public void onAvailable(Network network) {
        super.onAvailable(network);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            connectivityManager.bindProcessToNetwork(network);
        }
        mainActivity.runOnUiThread(() -> {
            Toast.makeText(mainActivity,
                "Connected to " + ssid.replace("\"", ""),
                Toast.LENGTH_SHORT).show();
        });
    }

    @Override
    public void onUnavailable() {
        super.onUnavailable();
        mainActivity.runOnUiThread(() -> {
            Toast.makeText(mainActivity,
                "Could not connect to " + ssid.replace("\"", ""),
                Toast.LENGTH_SHORT).show();
            connectivityManager.unregisterNetworkCallback(this);
        });
    }

    @Override
    public void onLost(Network network) {
        super.onLost(network);
        mainActivity.runOnUiThread(() -> {
            Toast.makeText(mainActivity,
                "Lost connection to " + ssid.replace("\"", ""),
                Toast.LENGTH_SHORT).show();
            connectivityManager.unregisterNetworkCallback(this);
        });
    }
}