android开发获取网络状态整理:
1 package com.gzcivil.utils; 2 3 import android.content.Context; 4 import android.net.ConnectivityManager; 5 import android.net.NetworkInfo; 6 import android.telephony.TelephonyManager; 7 import android.text.TextUtils; 8 9 public class NetworkUtils { 10 11 /** 没有网络 */ 12 public static final int NETWORKTYPE_INVALID = 0; 13 /** wap网络 */ 14 public static final int NETWORKTYPE_WAP = 1; 15 /** 2G网络 */ 16 public static final int NETWORKTYPE_2G = 2; 17 /** 3G和3G以上网络，或统称为快速网络 */ 18 public static final int NETWORKTYPE_3G = 3; 19 /** USB网络 */ 20 public static final int NETWORKTYPE_USB = 4; 21 /** wifi网络 */ 22 public static final int NETWORKTYPE_WIFI = 5; 23 24 /** 25 * 获取网络状态，wifi,wap,2g,3g. 26 * 27 * @param context 28 * 上下文 29 * @return int 网络状态 {@link #NETWORKTYPE_2G},{@link #NETWORKTYPE_3G}, * 30 * {@link #NETWORKTYPE_INVALID},{@link #NETWORKTYPE_WAP}* 31 * <p> 32 * {@link #NETWORKTYPE_WIFI} 33 */ 34 public static int getNetWorkType(Context context) { 35 ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); 36 NetworkInfo networkInfo = manager.getActiveNetworkInfo(); 37 int mNetWorkType = 0; 38 if (networkInfo != null && networkInfo.isConnected()) { 39 String type = networkInfo.getTypeName(); 40 if (type.equalsIgnoreCase("WIFI")) { 41 mNetWorkType = NETWORKTYPE_WIFI; 42 } else if (type.equalsIgnoreCase("usb")) { 43 mNetWorkType = NETWORKTYPE_USB; 44 } else if (type.equalsIgnoreCase("MOBILE")) { 45 @SuppressWarnings("deprecation") 46 String proxyHost = android.net.Proxy.getDefaultHost(); 47 mNetWorkType = TextUtils.isEmpty(proxyHost) ? (isFastMobileNetwork(context) ? NETWORKTYPE_3G : NETWORKTYPE_2G) : NETWORKTYPE_WAP; 48 } 49 } else { 50 mNetWorkType = NETWORKTYPE_INVALID; 51 } 52 return mNetWorkType; 53 } 54 55 private static boolean isFastMobileNetwork(Context context) { 56 TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); 57 switch (telephonyManager.getNetworkType()) { 58 case TelephonyManager.NETWORK_TYPE_1xRTT: 59 return false; // ~ 50-100 kbps 60 case TelephonyManager.NETWORK_TYPE_CDMA: 61 return false; // ~ 14-64 kbps 62 case TelephonyManager.NETWORK_TYPE_EDGE: 63 return false; // ~ 50-100 kbps 64 case TelephonyManager.NETWORK_TYPE_EVDO_0: 65 return true; // ~ 400-1000 kbps 66 case TelephonyManager.NETWORK_TYPE_EVDO_A: 67 return true; // ~ 600-1400 kbps 68 case TelephonyManager.NETWORK_TYPE_GPRS: 69 return false; // ~ 100 kbps 70 case TelephonyManager.NETWORK_TYPE_HSDPA: 71 return true; // ~ 2-14 Mbps 72 case TelephonyManager.NETWORK_TYPE_HSPA: 73 return true; // ~ 700-1700 kbps 74 case TelephonyManager.NETWORK_TYPE_HSUPA: 75 return true; // ~ 1-23 Mbps 76 case TelephonyManager.NETWORK_TYPE_UMTS: 77 return true; // ~ 400-7000 kbps 78 case TelephonyManager.NETWORK_TYPE_EHRPD: 79 return true; // ~ 1-2 Mbps 80 case TelephonyManager.NETWORK_TYPE_EVDO_B: 81 return true; // ~ 5 Mbps 82 case TelephonyManager.NETWORK_TYPE_HSPAP: 83 return true; // ~ 10-20 Mbps 84 case TelephonyManager.NETWORK_TYPE_IDEN: 85 return false; // ~25 kbps 86 case TelephonyManager.NETWORK_TYPE_LTE: 87 return true; // ~ 10+ Mbps 88 case TelephonyManager.NETWORK_TYPE_UNKNOWN: 89 return false; 90 default: 91 return false; 92 } 93 } 94 }