问题
I have an app that I want to be able to use to get a connection status report from a remote query.
I want to know if WiFi is connected, and if data access is enabled over mobile network.
If the WiFi goes out of range I want to know if I can rely on the mobile network.
The problem is that data enabled is always returned as true when I am connected by WiFi, and I can only properly query the mobile network when not connected by WiFi.
all the answers I have seen suggest polling to see what the current connection is, but I want to know if mobile network is available should I need it, even though I might be connected by WiFi at present.
Is there anyway of telling whether mobile network data is enabled without polling to see if is connected?
EDIT
So when connected by WiFi If I go to settings and deselect \'Data Enabled\' and then in my app I do this:
boolean mob_avail =
conMan.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isAvailable();
mob_avail is returned as \'true\', but I have disabled Mobile Network Data, so I would expect it to be \'false\'
If I turn off the WiFi, there is (rightly) no connection as I have disabled mobile network data.
so how do I check if mobile network data is enabled when I am connected by WiFi?
UPDATE
I took a look at getAllNetworkInfo() as suggested in the comments by ss1271
I outputted the info returned about the mobile network under the following 3 conditions
WiFi Off - Mobile Data on
WiFi On - Mobile Data off
WiFi On - Mobile Data on
and got the following results:
With WiFi OFF:
mobile[HSUPA], state: CONNECTED/CONNECTED, reason: unknown, extra: internet, roaming: false, failover: false, isAvailable: true, featureId: -1, userDefault: false
With WiFi On / Mobile OFF
NetworkInfo: type: mobile[HSUPA], state: DISCONNECTED/DISCONNECTED, reason: connectionDisabled, extra: (none), roaming: false, failover: false, isAvailable: true, featureId: -1, userDefault: false
With WiFi On / Mobile On
NetworkInfo: type: mobile[HSPA], state: DISCONNECTED/DISCONNECTED, reason: connectionDisabled, extra: (none), roaming: false, failover: false, isAvailable: true, featureId: -1, userDefault: false
So as you can see isAvailable returned true each time, and state only showed as Disconnected when WiFi was in affect.
CLARIFICATION
I am NOT looking to see if my phone is currently connected by Mobile Network. I AM trying to establish whether or not the user has enabled / disabled Data access over mobile network. They can turn this on and off by going to Settings -> Wireless and Network Settings ->Mobile Network Settings -> Data enabled
回答1:
The following code will tell you if "mobile data" is enabled or not, regardless of whether or not there is a mobile data connection active at the moment or whether or not wifi is enabled/active or not. This code only works on Android 2.3 (Gingerbread) and later. Actually this code also works on earlier versions of Android as well ;-)
boolean mobileDataEnabled = false; // Assume disabled
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
try {
Class cmClass = Class.forName(cm.getClass().getName());
Method method = cmClass.getDeclaredMethod("getMobileDataEnabled");
method.setAccessible(true); // Make the method callable
// get the setting for "mobile data"
mobileDataEnabled = (Boolean)method.invoke(cm);
} catch (Exception e) {
// Some problem accessible private API
// TODO do whatever error handling you want here
}
Note: you will need to have permission android.permission.ACCESS_NETWORK_STATE to be able to use this code.
回答2:
I've upgraded Allesio's answer. Settings.Secure's mobile_data int has moved to Settings.Global since 4.2.2.
Try This code when you want to know if mobile network is enabled even when wifi is enabled and connected.
Updated to check if SIM Card is available. Thanks for pointing out murat.
boolean mobileYN = false;
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
if (tm.getSimState() == TelephonyManager.SIM_STATE_READY) {
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1)
{
mobileYN = Settings.Global.getInt(context.getContentResolver(), "mobile_data", 1) == 1;
}
else{
mobileYN = Settings.Secure.getInt(context.getContentResolver(), "mobile_data", 1) == 1;
}
}
回答3:
One way is to check whether the user has mobile data activated in the Settings, which most likely will be used if wifi goes off. This works (tested), and it doesn't use reflection, although it uses an hidden value in the API:
boolean mobileDataAllowed = Settings.Secure.getInt(getContentResolver(), "mobile_data", 1) == 1;
Depending on the API, you need to check Settings.Global instead of Settings.Secure, as pointed out by @user1444325.
Source: Android API call to determine user setting "Data Enabled"
回答4:
@sNash's function works great. But in few devices I found it returns true even if data is disabled. So I found one alternate solution which is in Android API.
getDataState() method of TelephonyManager will be very useful.
I updated @snash's function with the above function used. Below function returns false when cellular data is disabled otherwise true.
private boolean checkMobileDataIsEnabled(Context context){
boolean mobileYN = false;
TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
if (tm.getSimState() == TelephonyManager.SIM_STATE_READY) {
TelephonyManager tel = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
// if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1)
// {
// mobileYN = Settings.Global.getInt(context.getContentResolver(), "mobile_data", 0) == 1;
// }
// else{
// mobileYN = Settings.Secure.getInt(context.getContentResolver(), "mobile_data", 0) == 1;
// }
int dataState = tel.getDataState();
Log.v(TAG,"tel.getDataState() : "+ dataState);
if(dataState != TelephonyManager.DATA_DISCONNECTED){
mobileYN = true;
}
}
return mobileYN;
}
回答5:
You can try something like that:
ConnectivityManager conMan = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
//mobile
State mobile = conMan.getNetworkInfo(0).getState();
//wifi
State wifi = conMan.getNetworkInfo(1).getState();
if (mobile == NetworkInfo.State.CONNECTED || mobile == NetworkInfo.State.CONNECTING)
{
//mobile
}
else if (wifi == NetworkInfo.State.CONNECTED || wifi == NetworkInfo.State.CONNECTING)
{
//wifi
}
If you are interested if you are realy connected, use
NetworkInfo.State.CONNECTED
only, instead of
NetworkInfo.State.CONNECTED || NetworkInfo.State.CONNECTING
回答6:
Here is a xamarin solution to this problem:
public static bool IsMobileDataEnabled()
{
bool result = false;
try
{
Context context = //get your context here or pass it as a param
if (Build.VERSION.SdkInt >= BuildVersionCodes.JellyBeanMr1)
{
//Settings comes from the namespace Android.Provider
result = Settings.Global.GetInt(context.ContentResolver, "mobile_data", 1) == 1;
}
else
{
result = Settings.Secure.GetInt(context.ContentResolver, "mobile_data", 1) == 1;
}
}
catch (Exception ex)
{
//handle exception
}
return result;
}
PS: Make sure you have all the permissions for this code.
回答7:
You must use the ConnectivityManager, and NetworkInfo details can be found here
回答8:
I think using NetworkInfo class and isConnected should work:
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
return info != NULL || info.isConnected();
And to check mobile data is connected perhaps. I can not be sure until I test it. Which I cannot do until tommorrow.
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
if(tm .getDataState() == tm .DATA_CONNECTED)
return true;
回答9:
To identify which SIM or slot is making data connection active in mobile, we need to register action android:name="android.net.conn.CONNECTIVITY_CHANGE" with permission
uses-permission android:name="android.permission.CONNECTIVITY_INTERNAL" & uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"
public void onReceive(Context context, Intent intent)
if (android.net.conn.CONNECTIVITY_CHANGE.equalsIgnoreCase(intent
.getAction())) {
IBinder b = ServiceManager.getService(Context.CONNECTIVITY_SERVICE);
IConnectivityManager service = IConnectivityManager.Stub.asInterface(b);
NetworkState[] states = service.getAllNetworkState();
for (NetworkState state : states) {
if (state.networkInfo.getType() == ConnectivityManager.TYPE_MOBILE
&& state.networkInfo.isConnected()) {
TelephonyManager mTelephonyManager = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
int slotList = { 0, 1 };
int[] subId = SubscriptionManager.getSubId(slotList[0]);
if(mTelephonyManager.getDataEnabled(subId[0])) {
// this means data connection is active for SIM1 similary you
//can chekc for SIM2 by slotList[1]
.................
}
}
}
回答10:
ConnectivityManager cm = (ConnectivityManager) activity
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
String networkType = "";
if (info.getType() == ConnectivityManager.TYPE_WIFI) {
networkType = "WIFI";
}
else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
networkType = "mobile";
}
回答11:
According to android documentation https://developer.android.com/training/monitoring-device-state/connectivity-monitoring#java
ConnectivityManager cm =
(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null &&
activeNetwork.isConnectedOrConnecting();
回答12:
use TelephonyManager
TelephonyManager tm = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
tm.isDataEnabled()
According to android documentation
https://developer.android.com/reference/android/telephony/TelephonyManager.html#isDataEnabled()
回答13:
Here is a simple solution from two other answers:
TelephonyManager tm = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
return tm.isDataEnabled();
} else {
return tm.getSimState() == TelephonyManager.SIM_STATE_READY && tm.getDataState() != TelephonyManager.DATA_DISCONNECTED;
}
回答14:
Well there is a workaround to check if the data connection is on. But I am not sure whether it will work on every device. You need to check that. (It worked on Android one device)
long data = TrafficStats.getMobileRxBytes();
if(data > 0){
//Data is On
}
else{
//Data is Off
}
If you are not aware about this method, it returns the total of bytes recieved through mobile network since the device boot up. When you turn off the mobile data connection, it will return Zero (0). When you turn on, it will return the total of bytes again. But you need to aware that there is a problem which can happen when using this workaround.
- This method will also return 0 when you reboot the phone because the calculation starts from 0 bytes.
回答15:
private boolean haveMobileNetworkConnection() {
boolean haveConnectedMobile = false;
ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo) {
if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
if (ni.isConnected())
haveConnectedMobile = true;
}
return haveConnectedMobile;
}
Note: you will need to have permission android.permission.ACCESS_NETWORK_STATE to be able to use this code
回答16:
There is simple API that seems to be working
TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
return tm.isDataEnabled();
来源：https://stackoverflow.com/questions/12806709/how-to-tell-if-mobile-network-data-is-enabled-or-disabled-even-when-connected