獲取Android當前網絡類型（2g、3g、4g、wifi）以及手機型號、版本號

獲取手機型號： android.os.Build.MODEL 獲取手機的SDK版本號：android.os.Build.VERSION.SDK   獲取手機當前網絡類型代碼如下：這是一個工具類，大家可以保存下來以後方便使用。

package com.iqtogether.qxueyou.support.util;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;

/**
 * 獲取網絡連接的工具類
 * Created by chengguo on 2016/3/17.
 */
public class IntenetUtil {
    
    //沒有網絡連接
    public static final int NETWORN_NONE = 0;
    //wifi連接
    public static final int NETWORN_WIFI = 1;
    //手機網絡數據連接類型
    public static final int NETWORN_2G = 2;
    public static final int NETWORN_3G = 3;
    public static final int NETWORN_4G = 4;
    public static final int NETWORN_MOBILE = 5;

    /**
     * 獲取當前網絡連接類型
     * @param context
     * @return
     */
    public static int getNetworkState(Context context) {
        //獲取系統的網絡服務
        ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        
        //如果當前沒有網絡
        if (null == connManager)
            return NETWORN_NONE;
        
        //獲取當前網絡類型，如果為空，返回無網絡
        NetworkInfo activeNetInfo = connManager.getActiveNetworkInfo();
        if (activeNetInfo == null || !activeNetInfo.isAvailable()) {
            return NETWORN_NONE;
        }
        
        // 判斷是不是連接的是不是wifi
        NetworkInfo wifiInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (null != wifiInfo) {
            NetworkInfo.State state = wifiInfo.getState();
            if (null != state)
                if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING) {
                    return NETWORN_WIFI;
                }
        }
        
        // 如果不是wifi，則判斷當前連接的是運營商的哪種網絡2g、3g、4g等
        NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if (null != networkInfo) {
            NetworkInfo.State state = networkInfo.getState();
            String strSubTypeName = networkInfo.getSubtypeName();
            if (null != state)
                if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING) {
                    switch (activeNetInfo.getSubtype()) {
                        //如果是2g類型
                        case TelephonyManager.NETWORK_TYPE_GPRS: // 聯通2g
                        case TelephonyManager.NETWORK_TYPE_CDMA: // 電信2g
                        case TelephonyManager.NETWORK_TYPE_EDGE: // 移動2g
                        case TelephonyManager.NETWORK_TYPE_1xRTT:
                        case TelephonyManager.NETWORK_TYPE_IDEN:
                            return NETWORN_2G;
                        //如果是3g類型
                        case TelephonyManager.NETWORK_TYPE_EVDO_A: // 電信3g
                        case TelephonyManager.NETWORK_TYPE_UMTS:
                        case TelephonyManager.NETWORK_TYPE_EVDO_0:
                        case TelephonyManager.NETWORK_TYPE_HSDPA:
                        case TelephonyManager.NETWORK_TYPE_HSUPA:
                        case TelephonyManager.NETWORK_TYPE_HSPA:
                        case TelephonyManager.NETWORK_TYPE_EVDO_B:
                        case TelephonyManager.NETWORK_TYPE_EHRPD:
                        case TelephonyManager.NETWORK_TYPE_HSPAP:
                            return NETWORN_3G;
                        //如果是4g類型
                        case TelephonyManager.NETWORK_TYPE_LTE:
                            return NETWORN_4G;
                        default:
                            //中國移動 聯通 電信 三種3G制式
                            if (strSubTypeName.equalsIgnoreCase("TD-SCDMA") || strSubTypeName.equalsIgnoreCase("WCDMA") || strSubTypeName.equalsIgnoreCase("CDMA2000")) {
                                return NETWORN_3G;
                            } else {
                                return NETWORN_MOBILE;
                            }
                    }
                }
        }
        return NETWORN_NONE;
    }
}