How do I see if Wi-Fi is connected on Android

Question

I don t want my user to even try downloading something unless they have Wi-Fi connected  However  I can only seem to be able to tell if Wi-Fi is enabled  but they could still have a 3G connection   android net wifi WifiManager m    WifiManager  getSystemService WIFI SERVICE   android net wifi SupplicantState s   m getConnectionInfo   getSupplicantState    NetworkInfo DetailedState state   WifiInfo getDetailedStateOf s   if  state    NetworkInfo DetailedState CONNECTED        return false      However  the state is not what I would expect  Even though Wi-Fi is connected  I am getting OBTAINING IPADDR as the state

User · Answer

The NetworkInfo class is deprecated as of API level 29  along with the related access methods like ConnectivityManager getNetworkInfo   and ConnectivityManager getActiveNetworkInfo      The documentation now suggests people to use the ConnectivityManager NetworkCallback API for asynchronized callback monitoring  or use ConnectivityManager getNetworkCapabilities or ConnectivityManager getLinkProperties for synchronized access of network information     Callers should instead use the ConnectivityManager NetworkCallback API to learn about connectivity changes  or switch to use ConnectivityManager getNetworkCapabilities or ConnectivityManager getLinkProperties to get information synchronously      To check if WiFi is connected  here s the code that I use   Kotlin   val connMgr   applicationContext getSystemService Context CONNECTIVITY SERVICE  as ConnectivityManager  connMgr   return false if  Build VERSION SDK INT  gt   Build VERSION CODES M        val network  Network   connMgr activeNetwork    return false     val capabilities   connMgr getNetworkCapabilities network      return capabilities    null  amp  amp  capabilities hasTransport NetworkCapabilities TRANSPORT WIFI    else       val networkInfo   connMgr activeNetworkInfo    return false     return networkInfo isConnected  amp  amp  networkInfo type    ConnectivityManager TYPE WIFI     Java   ConnectivityManager connMgr    ConnectivityManager  getApplicationContext   getSystemService Context CONNECTIVITY SERVICE   if  connMgr    null        return false    if  Build VERSION SDK INT  gt   Build VERSION CODES M        Network network   connMgr getActiveNetwork        if  network    null  return false      NetworkCapabilities capabilities   connMgr getNetworkCapabilities network       return capabilities    null  amp  amp  capabilities hasTransport NetworkCapabilities TRANSPORT WIFI     else       NetworkInfo networkInfo   connMgr getActiveNetworkInfo        return networkInfo isConnected    amp  amp  networkInfo getType      ConnectivityManager TYPE WIFI      Remember to also add permission ACCESS NETWORK STATE to your Manifest file

User · Answer

I had a look at a few questions like this and came up with this:

ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo wifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mobile = connManager .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

if (wifi.isConnected()){
    // If Wi-Fi connected
}

if (mobile.isConnected()) {
    // If Internet connected
}

I use if for my license check in Root Toolbox PRO, and it seems to work great.

User · Answer

This works for me       ConnectivityManager conMan    ConnectivityManager  getSystemService Context CONNECTIVITY SERVICE           Mobile     State mobile   conMan getNetworkInfo ConnectivityManager TYPE MOBILE  getState            Wi-Fi     State wifi   conMan getNetworkInfo ConnectivityManager TYPE WIFI  getState            And then use it like this       if  mobile    NetworkInfo State CONNECTED    mobile    NetworkInfo State CONNECTING                Toast makeText Wifi Gprs this  Mobile is Enabled          Toast LENGTH LONG  show              else if  wifi    NetworkInfo State CONNECTED    wifi    NetworkInfo State CONNECTING                Toast makeText Wifi Gprs this  Wifi is Enabled           Toast LENGTH LONG  show              else               Toast makeText Wifi Gprs this  No Wifi or Gprs Enabled          Toast LENGTH LONG  show            And add this permission    lt uses-permission android name  android permission INTERNET   gt   lt uses-permission android name  android permission ACCESS NETWORK STATE    gt

User · Answer

Try  wifiManager getConnectionInfo   getIpAddress     This returns 0 until the device has a usable connection  on my machine  a Samsung SM-T280  Android 5 1 1

User · Answer

Add this for JAVA   public boolean CheckWifiConnection             ConnectivityManager conMgr    ConnectivityManager  getSystemService  Context CONNECTIVITY SERVICE           if  conMgr getActiveNetworkInfo      null                  amp  amp  conMgr getActiveNetworkInfo   isAvailable                    amp  amp  conMgr getActiveNetworkInfo   isConnected                  return true            else               return false                    in Manifest file add the following permissions    lt uses-permission android name  android permission ACCESS WIFI STATE    gt

User · Answer

Try out this method   public boolean isInternetConnected         ConnectivityManager conMgr    ConnectivityManager  getSystemService Context CONNECTIVITY SERVICE       boolean ret   true      if  conMgr    null            NetworkInfo i   conMgr getActiveNetworkInfo             if  i    null                if   i isConnected                      ret   false                             if   i isAvailable                      ret   false                                   if  i    null              ret   false        else         ret   false      return ret      This method will help to find internet connection available or not

User · Answer

The following code  in Kotlin  works from API 21 until at least current API version  API 29   The function getWifiState   returns one of 3 possible values for the WiFi network state  Disable  EnabledNotConnected and Connected that were defined in an enum class  This allows to take more granular decisions like informing the user to enable WiFi or  if already enabled  to connect to one of the available networks  But if all that is needed is a boolean indicating if the WiFi interface is connected to a network  then the other function isWifiConnected   will give you that  It uses the previous one and compares the result to Connected   It s inspired in some of the previous answers but trying to solve the problems introduced by the evolution of Android API s or the slowly increasing availability of IP V6  The trick was to use   wifiManager connectionInfo bssid    null    instead of    getIpAddress      0 that is only valid for IP V4 or getNetworkId      -1 that now requires another special permission  Location    According to the documentation  https   developer android com reference kotlin android net wifi WifiInfo html getbssid it will return null if not connected to a network  And even if we do not have permission to get the real value  it will still return something other than null if we are connected   Also have the following in mind      On releases before android os Build VERSION CODES N  this object   should only be obtained from an Context getApplicationContext    and   not from any other derived context to avoid memory leaks within the   calling process    In the Manifest  do not forget to add    lt uses-permission android name  android permission ACCESS WIFI STATE   gt    Proposed code is   class MyViewModel application  Application    AndroidViewModel application           Get application context     private val myAppContext  Context   getApplication lt Application gt    applicationContext        Define the different possible states for the WiFi Connection     internal enum class WifiState           Disabled                   WiFi is not enabled         EnabledNotConnected        WiFi is enabled but we are not connected to any WiFi network         Connected                  Connected to a WiFi network               Get the current state of the WiFi network     private fun getWifiState     WifiState            val wifiManager   WifiManager   myAppContext applicationContext getSystemService Context WIFI SERVICE  as WifiManager          return if  wifiManager isWifiEnabled                        if  wifiManager connectionInfo bssid    null                          WifiState Connected                     else                         WifiState EnabledNotConnected                  else                       WifiState Disabled                                Returns true if we are connected to a WiFi network     private fun isWiFiConnected     Boolean           return  getWifiState      WifiState Connected

User · Answer

ConnectivityManager manager    ConnectivityManager  getSystemService CONNECTIVITY SERVICE   boolean is3g   manager getNetworkInfo                    ConnectivityManager TYPE MOBILE  isConnectedOrConnecting    boolean isWifi   manager getNetworkInfo                      ConnectivityManager TYPE WIFI  isConnectedOrConnecting     Log v     is3g     ConnectivityManager Test     isWifi   if   is3g  amp  amp   isWifi        Toast makeText          getApplicationContext             Please make sure  your network connection is ON            Toast LENGTH LONG  show      else          Put your function   to go further

User · Answer

Here is what I use as a utility method in my apps   public static boolean isDeviceOnWifi final Context context            ConnectivityManager connManager    ConnectivityManager  context getSystemService Context CONNECTIVITY SERVICE           NetworkInfo mWifi   connManager getNetworkInfo ConnectivityManager TYPE WIFI           return mWifi    null  amp  amp  mWifi isConnectedOrConnecting

User · Answer

While Jason s answer is correct  nowadays getNetWorkInfo  int  is a deprecated method  So  the next function would be a nice alternative   public static boolean isWifiAvailable  Context context        boolean br   false      ConnectivityManager cm   null      NetworkInfo ni   null       cm    ConnectivityManager  context getSystemService Context CONNECTIVITY SERVICE       ni   cm getActiveNetworkInfo        br     null    ni   amp  amp   ni isConnected     amp  amp   ni getType      ConnectivityManager TYPE WIFI         return br

User · Answer

This is an easier solution  See Stack Overflow question Checking Wi-Fi enabled or not on Android   P S  Do not forget to add the code to the manifest xml file to allow permission  As shown below    lt uses-permission android name  android permission ACCESS WIFI STATE   gt   lt  uses-permission gt   lt uses-permission android name  android permission ACCESS NETWORK STATE   gt   lt  uses-permission gt   lt uses-permission android name  android permission CHANGE WIFI STATE   gt   lt  uses-permission gt

User · Answer

I simply use the following       SupplicantState supState   wifiManager    WifiManager  getSystemService Context WIFI SERVICE   WifiInfo wifiInfo   wifiManager getConnectionInfo    supState   wifiInfo getSupplicantState      Which will return one of these states at the time you call getSupplicantState        ASSOCIATED - Association completed        ASSOCIATING - Trying to associate with   an access point       COMPLETED - All authentication   completed        DISCONNECTED - This state indicates   that client is not associated  but is   likely to start looking for an access   point        DORMANT - An Android-added state that   is reported when a client issues an   explicit DISCONNECT command        FOUR WAY HANDSHAKE - WPA 4-Way Key   Handshake in progress        GROUP HANDSHAKE  - WPA Group Key   Handshake in progress        INACTIVE - Inactive state       INVALID - A pseudo-state that should   normally never be seen       SCANNING - Scanning for a network        UNINITIALIZED - No connection

User · Answer

You should be able to use the ConnectivityManager to get the state of the Wi-Fi adapter  From there you can check if it is connected or even available   ConnectivityManager connManager    ConnectivityManager  getSystemService Context CONNECTIVITY SERVICE   NetworkInfo mWifi   connManager getNetworkInfo ConnectivityManager TYPE WIFI    if  mWifi isConnected             Do whatever     NOTE  It should be noted  for us n00bies here  that you need to add   lt uses-permission android name  android permission ACCESS NETWORK STATE    gt    to your  AndroidManifest xml for this to work   NOTE2  public NetworkInfo getNetworkInfo  int networkType  is now deprecated      This method was deprecated in API level 23  This method does not   support multiple connected networks of the same type  Use   getAllNetworks   and getNetworkInfo android net Network  instead    NOTE3  public static final int TYPE WIFI is now deprecated      This constant was deprecated in API level 28    Applications should instead use NetworkCapabilities hasTransport int  or requestNetwork NetworkRequest  NetworkCallback  to request an appropriate network  for supported transports

User · Answer

Since the method NetworkInfo isConnected   is now deprecated in API-23  here is a method which detects if the Wi-Fi adapter is on and also connected to an access point using WifiManager instead   private boolean checkWifiOnAndConnected         WifiManager wifiMgr    WifiManager  getSystemService Context WIFI SERVICE        if  wifiMgr isWifiEnabled         Wi-Fi adapter is ON          WifiInfo wifiInfo   wifiMgr getConnectionInfo             if  wifiInfo getNetworkId      -1                return false     Not connected to an access point                   return true     Connected to an access point           else           return false     Wi-Fi adapter is OFF

User · Answer

Many of answers use deprecated code  or code available on higer API versions  Now I use something like this  ConnectivityManager connectivityManager    ConnectivityManager  context getSystemService Context CONNECTIVITY SERVICE           if connectivityManager    null                for  Network net   connectivityManager getAllNetworks                      NetworkCapabilities nc   connectivityManager getNetworkCapabilities net                   if  nc    null  amp  amp  nc hasTransport NetworkCapabilities TRANSPORT WIFI                           amp  amp  nc hasCapability NetworkCapabilities NET CAPABILITY INTERNET                       return true                                  return false

User · Answer

val wifi   context   applicationContext getSystemService Context WIFI SERVICE  as WifiManager                   if  wifi   isWifiEnabled                   do action here               else                 do action here

User · Answer

Kind of old a question but this is what i use  requires min api level 21 also takes in consideration deprecated Networkinfo apis   boolean isWifiConn   false      ConnectivityManager connMgr    ConnectivityManager  context getSystemService Context CONNECTIVITY SERVICE       if  Build VERSION SDK INT  gt   Build VERSION CODES M            Network network   connMgr getActiveNetwork            if  network    null  return false          NetworkCapabilities capabilities   connMgr getNetworkCapabilities network           if capabilities    null  amp  amp  capabilities hasTransport NetworkCapabilities TRANSPORT WIFI                isWifiConn   true              Toast makeText context  Wifi connected Api  gt     Build VERSION CODES M Toast LENGTH LONG  show             else              Toast makeText context  Wifi not connected Api  gt     Build VERSION CODES M Toast LENGTH LONG  show                    else           for  Network network   connMgr getAllNetworks                  NetworkInfo networkInfo   connMgr getNetworkInfo network               if  networkInfo getType      ConnectivityManager TYPE WIFI  amp  amp  networkInfo isConnected                      isWifiConn   true                  Toast makeText context  Wifi connected   Toast LENGTH LONG  show                    break               else                  Toast makeText context  Wifi not connected   Toast LENGTH LONG  show                                      return isWifiConn

User · Answer

I am using this in my apps to check if the active network is Wi-Fi   ConnectivityManager cm    ConnectivityManager  getSystemService Context CONNECTIVITY SERVICE   NetworkInfo ni   cm getActiveNetworkInfo    if  ni    null  amp  amp  ni getType      ConnectivityManager TYPE WIFI            Do your work here

User · Answer

Using WifiManager you can do   WifiManager wifi    WifiManager  getSystemService  Context WIFI SERVICE   if  wifi getConnectionInfo   getNetworkId      -1      connected       The method getNeworkId returns -1 only when it s not connected to a network

User · Answer

You can turn WIFI on if it s not activated as the following  1  check WIFI state as answered by  Jason Knight  2  if not activated  activate it don t forget to add WIFI permission in the manifest file   lt uses-permission android name  android permission ACCESS NETWORK STATE    gt    Your Java class should be like that  public class TestApp extends Activity   protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout main          check WIFI activation     ConnectivityManager connManager    ConnectivityManager  getSystemService Context CONNECTIVITY SERVICE       NetworkInfo mWifi   connManager getNetworkInfo ConnectivityManager TYPE WIFI        if  mWifi isConnected      false            showWIFIDisabledAlertToUser              else           Toast makeText this   WIFI is Enabled in your devide   Toast LENGTH SHORT  show              private void showWIFIDisabledAlertToUser        AlertDialog Builder alertDialogBuilder   new AlertDialog Builder this       alertDialogBuilder setMessage  WIFI is disabled in your device  Would you like to enable it                 setCancelable false               setPositiveButton  Goto Settings Page To Enable WIFI                       new DialogInterface OnClickListener                            public void onClick DialogInterface dialog  int id                               Intent callGPSSettingIntent   new Intent                                      Settings ACTION WIFI SETTINGS                               startActivity callGPSSettingIntent                                                         alertDialogBuilder setNegativeButton  Cancel               new DialogInterface OnClickListener                    public void onClick DialogInterface dialog  int id                       dialog cancel                                          AlertDialog alert   alertDialogBuilder create        alert show

User · Answer

Similar to  Jason Knight answer  but in Kotlin way   val connManager   getSystemService Context CONNECTIVITY SERVICE  as ConnectivityManager val mWifi   connManager getNetworkInfo ConnectivityManager TYPE WIFI   if  mWifi isConnected            Do whatever

User · Answer

In new version Android

private void getWifiInfo(Context context) {
    ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    Network[] networks = connManager.getAllNetworks();

    if(networks == null || networks.length == 0)
        return;

    for( int i = 0; i < networks.length; i++) {
        Network ntk = networks[i];
        NetworkInfo ntkInfo = connManager.getNetworkInfo(ntk);
        if (ntkInfo.getType() == ConnectivityManager.TYPE_WIFI && ntkInfo.isConnected() ) {
            final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
            final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
            if (connectionInfo != null) {
                // add some code here
            }
        }

    }
}

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[android] How do I see if Wi-Fi is connected on Android?

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