前言
在我们的 App 进行网络请求时,经常会遇到断网,重连,数据流量和 WIFI 变化等情况,那么我们要怎么去判断当前的情况呢?接下来就给大家介绍常用的网络状态判断方法.
判断是否有网络连接
判断 WIFI 网络是否可用
判断数据流量是否可用
获取当前网络连接的类型信息
获取当前的网络状态
判断
1. 判断是否有网络连接
有网时返回 true,没网时返回 false
public static boolean isNetworkConnected(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 WIFI 网络是否可用
是 WIFI 网络返回 true,不是 WIFI 返回 false
public static boolean isWifiConnected(Context context) {
if (context != null) {
ConnectivityManager mConnectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mWiFiNetworkInfo = mConnectivityManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (mWiFiNetworkInfo != null) {
return mWiFiNetworkInfo.isAvailable();
}
}
return false;
}
判断数据流量是否可用
是数据流量时返回 true,不是返回 false
public static boolean isMobileConnected(Context context) {
if (context != null) {
ConnectivityManager mConnectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mMobileNetworkInfo = mConnectivityManager
.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if (mMobileNetworkInfo != null) {
return mMobileNetworkInfo.isAvailable();
}
}
return false;
}
获取当前网络连接的类型信息
获取当前的网络状态
public static int getConnectedType(Context context) {
if (context != null) {
ConnectivityManager mConnectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {
return mNetworkInfo.getType();
}
}
return -1;
}
没有网络 0:WIFI 网络 1:3G 网络 2:2G 网络 3
public static int getAPNType(Context context) {
int netType = 0;
ConnectivityManager connMgr = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo == null) {
return netType;
}
int nType = networkInfo.getType();
if (nType == ConnectivityManager.TYPE_WIFI) {
netType = 1;// wifi
} else if (nType == ConnectivityManager.TYPE_MOBILE) {
int nSubType = networkInfo.getSubtype();
TelephonyManager mTelephony = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
if (nSubType == TelephonyManager.NETWORK_TYPE_UMTS
&& !mTelephony.isNetworkRoaming()) {
netType = 2;// 3G
} else {
netType = 3;// 2G
}
}
return netType;
}
来源: http://www.jianshu.com/p/83c28dcc6f75