通过广播接收器监控Wifi连接和断开状态

<receiver android:name=".WifiReceiver">
    <intent-filter>
        <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
        <action android:name="android.net.wifi.STATE_CHANGE" />
    </intent-filter>
</receiver>

public class WifiReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        
        if (action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) {
            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN);
            if (wifiState == WifiManager.WIFI_STATE_ENABLED) {
                // Wifi已打开
            } else if (wifiState == WifiManager.WIFI_STATE_DISABLED) {
                // Wifi已关闭
            }
        } else if (action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
            NetworkInfo networkInfo = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
            if (networkInfo != null && networkInfo.isConnected()) {
                // 已连接到一个Wifi网络
                WifiInfo wifiInfo = intent.getParcelableExtra(WifiManager.EXTRA_WIFI_INFO);
                if (wifiInfo != null) {
                    String ssid = wifiInfo.getSSID(); // 获取当前连接的Wifi网络名称
                    // 处理连接成功的逻辑
                }
            } else {
                // Wifi连接已断开
                // 处理断开连接的逻辑
            }
        }
    }
}