如何在Android中检查互联网连接？

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.widget.Toast;

import java.io.IOException;
import java.net.InetAddress;

public class InternetConnectivityChecker extends AsyncTask<Void, Void, Boolean> {

    private Context mContext;

    public InternetConnectivityChecker(Context context) {
        mContext = context;
    }

    @Override
    protected Boolean doInBackground(Void... voids) {
        try {
            // 检查网络连接状态
            ConnectivityManager connectivityManager = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
            if (networkInfo != null && networkInfo.isConnected()) {
                // 检查互联网连接可用性
                InetAddress inetAddress = InetAddress.getByName("www.google.com");
                return inetAddress.isReachable(5000); // 设置超时时间为5秒
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return false;
    }

    @Override
    protected void onPostExecute(Boolean isConnected) {
        if (isConnected) {
            Toast.makeText(mContext, "已连接到互联网", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(mContext, "未连接到互联网", Toast.LENGTH_SHORT).show();
        }
    }
}