判断网络状态

public static boolean isNetworkAvailable(Context context) {
try {
ConnectivityManager cn = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (cn != null) {
NetworkInfo info = cn.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
if (info.getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
} catch (Exception e) {
return false;
}
return false;

}

public static boolean isWifi(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
if (activeNetInfo != null
&& activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {
return true;
}
return false;
}

public static boolean isMobileDataNetwork(Context context) {
ConnectivityManager connectivityMgr = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityMgr != null) {
NetworkInfo netInfo = connectivityMgr.getActiveNetworkInfo();
if (netInfo != null) {
switch (netInfo.getType()) {
case ConnectivityManager.TYPE_MOBILE:
case ConnectivityManager.TYPE_MOBILE_MMS:
case ConnectivityManager.TYPE_MOBILE_SUPL:
case ConnectivityManager.TYPE_MOBILE_DUN:
case ConnectivityManager.TYPE_MOBILE_HIPRI:
return true;
default:
return false;
}
}
return false;
}
return false;
}