NetworkUtil.java

package com.diandi.demo.util;

import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.net.wifi.WifiManager;

import com.diandi.demo.config.Constant;

/**
 * *******************************************************************************
 * *********    Author : klob(kloblic@gmail.com) .
 * *********    Date : 2014-11-29  .
 * *********    Time : 11:46 .
 * *********    Project name : Diandi1.18 .
 * *********    Version : 1.0
 * *********    Copyright @ 2014, klob, All Rights Reserved
 * *******************************************************************************
 */
public class NetworkUtil {

    /**
     * 返回网络是否可用。需要权限：
     * <p>
     * <b> < uses-permission
     * android:name="android.permission.ACCESS_NETWORK_STATE" /> </b>
     * </p>
     *
     * @param context 上下文
     * @return 网络可用则返回true，否则返回false
     */
    public static boolean isAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = cm.getActiveNetworkInfo();
        return info != null && info.isAvailable();
    }

    /**
     * 判断网络连接状态
     *
     * @param context
     * @return
     */
    public static String getNetType(Context context) {

        try {
            ConnectivityManager connectivity = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            if (connectivity != null) {

                NetworkInfo info = connectivity.getActiveNetworkInfo();
                if (info != null && info.isConnected()) {

                    if (info.getState() == NetworkInfo.State.CONNECTED) {
                        if (info.getType() == ConnectivityManager.TYPE_WIFI) {
                            // wifi
                            return Constant.NETWORK_TYPE_WIFI;
                        } else {
                            // 手机网络
                            return Constant.NETWORK_TYPE_MOBILE;
                        }
                    }
                }
            }
        } catch (Exception e) {
            // 网络错误
            return Constant.NETWORK_TYPE_ERROR;
        }
        // 网络错误
        return Constant.NETWORK_TYPE_ERROR;

    }

    /**
     * 返回Wifi是否启用
     *
     * @param context 上下文
     * @return Wifi网络可用则返回true，否则返回false
     */
    public static boolean isWIFIActivate(Context context) {
        return ((WifiManager) context.getSystemService(Context.WIFI_SERVICE))
                .isWifiEnabled();
    }

    /**
     * 修改Wifi状态
     *
     * @param context 上下文
     * @param status  true为开启Wifi，false为关闭Wifi
     */
    public static void changeWIFIStatus(Context context, boolean status) {
        ((WifiManager) context.getSystemService(Context.WIFI_SERVICE))
                .setWifiEnabled(status);
    }

    public static void openLink(Context context) {
        Uri uri = Uri.parse(Constant.OFFICIAL_WEBSITE);
        Intent it = new Intent(Intent.ACTION_VIEW, uri);
        context.startActivity(it);
    }
}