android判断是否连接网络

public static boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity == null) {
System.out.println("**** newwork is off");
return false;
} else {
NetworkInfo info = connectivity.getActiveNetworkInfo();
if (info == null) {
System.out.println("**** newwork is off");
return false;
} else {
if (info.isAvailable()) {
System.out.println("**** newwork is on");
return true;
}
}
}
System.out.println("**** newwork is off");
return false;
}

public static boolean isWiFiActive(Context inContext) {
WifiManager mWifiManager = (WifiManager) inContext.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = mWifiManager.getConnectionInfo();
int ipAddress = wifiInfo == null ? 0 : wifiInfo.getIpAddress();
if (mWifiManager.isWifiEnabled() && ipAddress != 0) {
System.out.println("**** WIFI is on");
return true;
} else {
System.out.println("**** WIFI is off");
return false;
}
}

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