Netutil ——工具类

原创于 2019-02-15 20:07:29 发布 · 1.4k 阅读

CC 4.0 BY-SA版权

本文介绍了一个用于检查Android设备网络连接状态并从指定URL获取数据的实用工具类。该工具类提供了两个主要方法：一是判断当前设备是否连接到网络，二是通过GET请求从网络获取字符串形式的数据。

package com.example.day_02;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

/**
*
*
*
*
*/
//判断网络
public class NetUtli {
public boolean isNetConnection(Context context) {
if (context != null) {
ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = manager.getActiveNetworkInfo();
if (info != null) {
return info.isAvailable();
}
}
return false;
}

//  请求数据
public static String getNetDate(String UrlDate) {
    try {
        URL url = new URL(UrlDate);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
        int code = connection.getResponseCode();
        if (code == 200) {
            InputStream stream = connection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
            StringBuffer buffer = new StringBuffer();
            String str = "";
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }
            return buffer.toString();
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
    return "";
}

}