android 开发过程中对网络状态的判断的工具类
16lz
2022-08-13
public class NetworkUtil { //没有网络连接 public static final int NETWORN_NONE = 0; //wifi连接 public static final int NETWORN_WIFI = 1; //手机网络数据连接类型 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; /** * 获取当前网络连接类型 * * @param context * @return */ public static int getNetworkType(Context context) { //获取系统的网络服务 ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); //如果当前没有网络 if (null == connManager) return NETWORN_NONE; //获取当前网络类型,如果为空,返回无网络 NetworkInfo activeNetInfo = connManager.getActiveNetworkInfo(); if (activeNetInfo == null || !activeNetInfo.isAvailable()) { return NETWORN_NONE; } // 判断是不是连接的是不是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,则判断当前连接的是运营商的哪种网络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类型 case TelephonyManager.NETWORK_TYPE_GPRS: // 联通2g case TelephonyManager.NETWORK_TYPE_CDMA: // 电信2g case TelephonyManager.NETWORK_TYPE_EDGE: // 移动2g case TelephonyManager.NETWORK_TYPE_1xRTT: case TelephonyManager.NETWORK_TYPE_IDEN: return NETWORN_2G; //如果是3g类型 case TelephonyManager.NETWORK_TYPE_EVDO_A: // 电信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类型 case TelephonyManager.NETWORK_TYPE_LTE: return NETWORN_4G; default: //中国移动 联通 电信 三种3G制式 if (strSubTypeName.equalsIgnoreCase("TD-SCDMA") || strSubTypeName.equalsIgnoreCase("WCDMA") || strSubTypeName.equalsIgnoreCase("CDMA2000")) { return NETWORN_3G; } else { return NETWORN_MOBILE; } } } } return NETWORN_NONE; } //判断网络是否连接(是否打开移动网络或者是连接wifi) public static boolean isNetworkAvailable(Context context) { if (context != null) { ConnectivityManager mConnectivityManager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo(); if (mNetworkInfo != null) { return mNetworkInfo.isAvailable(); } } return false; } //判断外网是否可用(常用于wifi已经连接但是无法访问外网的情况),耗时操作,不应该放在主线程 public static boolean isNetworkOnline() { Runtime runtime = Runtime.getRuntime(); try { String ip = "www.baidu.com";// 除非百度挂了,否则用这个应该没问题~ Process ipProcess = runtime.getRuntime().exec("ping -c 3 -w 100 " + ip);//ping3次 int exitValue = ipProcess.waitFor(); return (exitValue == 0); } catch (IOException | InterruptedException e) { e.printStackTrace(); } return false; }}
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