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android.net.ConnectivityManager. Class that answers queries about the state of network connectivity. It also notifies applications when network connectivity changes. The primary responsibilities of this class are to: Monitor network connections (Wi-Fi, GPRS, UMTS, etc.)
Checking Network Connection getSystemService(Context. CONNECTIVITY_SERVICE); Once you instantiate the object of ConnectivityManager class, you can use getAllNetworkInfo method to get the information of all the networks. This method returns an array of NetworkInfo.
You can use:
getActiveNetworkInfo();
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (activeNetwork != null) {
// connected to the internet
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
// connected to wifi
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
// connected to mobile data
}
} else {
// not connected to the internet
}
Or in a switch case
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (activeNetwork != null) {
// connected to the internet
switch (activeNetwork.getType()) {
case ConnectivityManager.TYPE_WIFI:
// connected to wifi
break;
case ConnectivityManager.TYPE_MOBILE:
// connected to mobile data
break;
default:
break;
}
} else {
// not connected to the internet
}
February 2020 Update:
The accepted answer is deprecated again in 28 (Android P), but its replacement method only works on 23 (Android M). To support older devices, I wrote a helper function in both Kotlin and Java.
How to use:
int type = getConnectionType(getApplicationContext());
It returns an int, you can change it to enum in your code:
0: No Internet available (maybe on airplane mode, or in the process of joining an wi-fi).
1: Cellular (mobile data, 3G/4G/LTE whatever).
2: Wi-fi.
3: VPN
You can copy either the Kotlin or the Java version of the helper function.
Kotlin:
@IntRange(from = 0, to = 3)
fun getConnectionType(context: Context): Int {
var result = 0 // Returns connection type. 0: none; 1: mobile data; 2: wifi
val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
cm?.run {
cm.getNetworkCapabilities(cm.activeNetwork)?.run {
if (hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
result = 2
} else if (hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
result = 1
} else if (hasTransport(NetworkCapabilities.TRANSPORT_VPN)){
result = 3
}
}
}
} else {
cm?.run {
cm.activeNetworkInfo?.run {
if (type == ConnectivityManager.TYPE_WIFI) {
result = 2
} else if (type == ConnectivityManager.TYPE_MOBILE) {
result = 1
} else if(type == ConnectivityManager.TYPE_VPN) {
result = 3
}
}
}
}
return result
}
Java:
@IntRange(from = 0, to = 3)
public static int getConnectionType(Context context) {
int result = 0; // Returns connection type. 0: none; 1: mobile data; 2: wifi
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (cm != null) {
NetworkCapabilities capabilities = cm.getNetworkCapabilities(cm.getActiveNetwork());
if (capabilities != null) {
if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
result = 2;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
result = 1;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {
result = 3;
}
}
}
} else {
if (cm != null) {
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (activeNetwork != null) {
// connected to the internet
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
result = 2;
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
result = 1;
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_VPN) {
result = 3;
}
}
}
}
return result;
}
As for October 2018, accepted answer is deprecated.
getType(), and types themselves, are now deprecated in API Level 28. From Javadoc:
Callers should switch to checking NetworkCapabilities#hasTransport instead with one of the NetworkCapabilities#TRANSPORT* constants
In order to use NetworkCapabilities, you need to pass a Network instance to the getNetworkCapabilities() method. To get that instance you need to call getActiveNetwork() which was added in API Level 23.
So I believe for now the right way to safely check whether you are connected to Wi-Fi or cellular network is:
public static boolean isNetworkConnected() {
final ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (cm != null) {
if (Build.VERSION.SDK_INT < 23) {
final NetworkInfo ni = cm.getActiveNetworkInfo();
if (ni != null) {
return (ni.isConnected() && (ni.getType() == ConnectivityManager.TYPE_WIFI || ni.getType() == ConnectivityManager.TYPE_MOBILE));
}
} else {
final Network n = cm.getActiveNetwork();
if (n != null) {
final NetworkCapabilities nc = cm.getNetworkCapabilities(n);
return (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI));
}
}
}
return false;
}
You can also check for other types of TRANSPORT, which you can find here.
Important note: if you are connected to Wi-Fi and to a VPN, then your current state could be TRANSPORT_VPN, so you might want to also check for it.
Don't forget to add the following permission to your AndroidManifest file:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Updated answer (19:07:2018):
This method will help you check if the internet connection is available.
public static boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null) {
NetworkInfo activeNetwork = connectivityManager.getActiveNetworkInfo();
return (activeNetwork != null && activeNetwork.isConnectedOrConnecting());
} else {
return false;
}
}
Old answer:
For best code reuse practice, improvising Cheese Bread answer.
public static boolean isNetworkAvailable(Context context) {
int[] networkTypes = {ConnectivityManager.TYPE_MOBILE,
ConnectivityManager.TYPE_WIFI};
try {
ConnectivityManager connectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
for (int networkType : networkTypes) {
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
if (activeNetworkInfo != null &&
activeNetworkInfo.getType() == networkType)
return true;
}
} catch (Exception e) {
return false;
}
return false;
}
The code can be placed in Util class and can be used to check whether the phone is connected to Internet via Wifi or Mobile Internet from any part of your application.
There is an update to this answer as of March 2020 that supports API.15 through API.29, you can find it following to the original answer
Answer February 2019
To check if you're online:
boolean isOnline() {
// Checking internet connectivity
ConnectivityManager connectivityMgr = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = null;
if (connectivityMgr != null) {
activeNetwork = connectivityMgr.getActiveNetworkInfo();
}
return activeNetwork != null;
}
Kotlin:
fun isOnline(): Boolean {
val connectivityMgr = getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
return connectivityMgr.activeNetworkInfo != null
} else {
for (network in connectivityMgr.allNetworks) { // added in API 21 (Lollipop)
val networkCapabilities: NetworkCapabilities? =
connectivityMgr.getNetworkCapabilities(network)
return (networkCapabilities!!.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) &&
networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED) &&
(networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)))
}
}
return false
}
To get the type of internet connectivity before/after android M
void internetType() {
// Checking internet connectivity
ConnectivityManager connectivityMgr = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = null;
if (connectivityMgr != null) {
activeNetwork = connectivityMgr.getActiveNetworkInfo();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
NetworkCapabilities nc = connectivityMgr.getNetworkCapabilities(connectivityMgr.getActiveNetwork());
if (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
// connected to mobile data
} else if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
// connected to wifi
}
} else {
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
// connected to wifi
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
// connected to mobile data
}
}
}
}
All cases requires a permission to access network state
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Update December 2020
As NetworkInfo is deprecated and as of API 29 from now we have to use ConnectivityManager.NetworkCallback with its network state change onAvailable() & onLost() callbacks.
Usage:
Features
LifecycleObserver to avoid memory leakage by doing some cleanup in onDestroy() method.BoradcastReceiver and NetworkInfo, and uses ConnectivityManager.NetworkCallback for API 21 and above.android.permission.ACCESS_NETWORK_STATE; but you have to include it if you're going to use the utility class.Capabilities
@RequiresApi(api = Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)
public class ConnectionUtil implements LifecycleObserver {
private static final String TAG = "LOG_TAG";
private ConnectivityManager mConnectivityMgr;
private Context mContext;
private NetworkStateReceiver mNetworkStateReceiver;
/*
* boolean indicates if my device is connected to the internet or not
* */
private boolean mIsConnected = false;
private ConnectionMonitor mConnectionMonitor;
/**
* Indicates there is no available network.
*/
private static final int NO_NETWORK_AVAILABLE = -1;
/**
* Indicates this network uses a Cellular transport.
*/
public static final int TRANSPORT_CELLULAR = 0;
/**
* Indicates this network uses a Wi-Fi transport.
*/
public static final int TRANSPORT_WIFI = 1;
public interface ConnectionStateListener {
void onAvailable(boolean isAvailable);
}
public ConnectionUtil(Context context) {
mContext = context;
mConnectivityMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
((AppCompatActivity) mContext).getLifecycle().addObserver(this);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mConnectionMonitor = new ConnectionMonitor();
NetworkRequest networkRequest = new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.build();
mConnectivityMgr.registerNetworkCallback(networkRequest, mConnectionMonitor);
}
}
/**
* Returns true if connected to the internet, and false otherwise
*
* <p>
* NetworkInfo is deprecated in API 29
* https://developer.android.com/reference/android/net/NetworkInfo
* <p>
* getActiveNetworkInfo() is deprecated in API 29
* https://developer.android.com/reference/android/net/ConnectivityManager#getActiveNetworkInfo()
* <p>
* getNetworkInfo(int) is deprecated as of API 23
* https://developer.android.com/reference/android/net/ConnectivityManager#getNetworkInfo(int)
*/
public boolean isOnline() {
mIsConnected = false;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
// Checking internet connectivity
NetworkInfo activeNetwork = null;
if (mConnectivityMgr != null) {
activeNetwork = mConnectivityMgr.getActiveNetworkInfo(); // Deprecated in API 29
}
mIsConnected = activeNetwork != null;
} else {
Network[] allNetworks = mConnectivityMgr.getAllNetworks(); // added in API 21 (Lollipop)
for (Network network : allNetworks) {
NetworkCapabilities networkCapabilities = mConnectivityMgr.getNetworkCapabilities(network);
if (networkCapabilities != null) {
if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) &&
networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED))
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET))
mIsConnected = true;
}
}
}
return mIsConnected;
}
/**
* Returns
* <p> <p>
* <p><p> NO_NETWORK_AVAILABLE >>> when you're offline
* <p><p> TRANSPORT_CELLULAR >> When Cellular is the active network
* <p><p> TRANSPORT_WIFI >> When Wi-Fi is the Active network
* <p>
*/
public int getActiveNetwork() {
NetworkInfo activeNetwork = mConnectivityMgr.getActiveNetworkInfo(); // Deprecated in API 29
if (activeNetwork != null)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
NetworkCapabilities capabilities = mConnectivityMgr.getNetworkCapabilities(mConnectivityMgr.getActiveNetwork());
if (capabilities != null)
if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
// connected to mobile data
return TRANSPORT_CELLULAR;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
// connected to wifi
return TRANSPORT_WIFI;
}
} else {
if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) { // Deprecated in API 28
// connected to mobile data
return TRANSPORT_CELLULAR;
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) { // Deprecated in API 28
// connected to wifi
return TRANSPORT_WIFI;
}
}
return NO_NETWORK_AVAILABLE;
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public int getAvailableNetworksCount() {
int count = 0;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
Network[] allNetworks = mConnectivityMgr.getAllNetworks(); // added in API 21 (Lollipop)
for (Network network : allNetworks) {
NetworkCapabilities networkCapabilities = mConnectivityMgr.getNetworkCapabilities(network);
if (networkCapabilities != null)
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR))
count++;
}
}
return count;
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public List<Integer> getAvailableNetworks() {
List<Integer> activeNetworks = new ArrayList<>();
Network[] allNetworks; // added in API 21 (Lollipop)
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
allNetworks = mConnectivityMgr.getAllNetworks();
for (Network network : allNetworks) {
NetworkCapabilities networkCapabilities = mConnectivityMgr.getNetworkCapabilities(network);
if (networkCapabilities != null) {
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
activeNetworks.add(TRANSPORT_WIFI);
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR))
activeNetworks.add(TRANSPORT_CELLULAR);
}
}
}
return activeNetworks;
}
public void onInternetStateListener(ConnectionStateListener listener) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
mNetworkStateReceiver = new NetworkStateReceiver(listener);
IntentFilter intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
mContext.registerReceiver(mNetworkStateReceiver, intentFilter);
} else {
mConnectionMonitor.setOnConnectionStateListener(listener);
}
}
@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
public void onDestroy() {
Log.d(TAG, "onDestroy");
((AppCompatActivity) mContext).getLifecycle().removeObserver(this);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (mConnectionMonitor != null)
mConnectivityMgr.unregisterNetworkCallback(mConnectionMonitor);
} else {
if (mNetworkStateReceiver != null)
mContext.unregisterReceiver(mNetworkStateReceiver);
}
}
public class NetworkStateReceiver extends BroadcastReceiver {
ConnectionStateListener mListener;
public NetworkStateReceiver(ConnectionStateListener listener) {
mListener = listener;
}
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getExtras() != null) {
NetworkInfo activeNetworkInfo = mConnectivityMgr.getActiveNetworkInfo(); // deprecated in API 29
/*
* activeNetworkInfo.getState() deprecated in API 28
* NetworkInfo.State.CONNECTED deprecated in API 29
* */
if (!mIsConnected && activeNetworkInfo != null && activeNetworkInfo.getState() == NetworkInfo.State.CONNECTED) {
Log.d(TAG, "onReceive: " + "Connected To: " + activeNetworkInfo.getTypeName());
mIsConnected = true;
mListener.onAvailable(true);
} else if (intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, Boolean.FALSE)) {
if (!isOnline()) {
mListener.onAvailable(false);
mIsConnected = false;
}
}
}
}
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class ConnectionMonitor extends ConnectivityManager.NetworkCallback {
private ConnectionStateListener mConnectionStateListener;
void setOnConnectionStateListener(ConnectionStateListener connectionStateListener) {
mConnectionStateListener = connectionStateListener;
}
@Override
public void onAvailable(@NonNull Network network) {
if (mIsConnected)
return;
Log.d(TAG, "onAvailable: ");
if (mConnectionStateListener != null) {
mConnectionStateListener.onAvailable(true);
mIsConnected = true;
}
}
@Override
public void onLost(@NonNull Network network) {
if (getAvailableNetworksCount() == 0) {
if (mConnectionStateListener != null)
mConnectionStateListener.onAvailable(false);
mIsConnected = false;
}
}
}
}
class ConnectionUtil(var mContext: Context) : LifecycleObserver {
private val TAG = "LOG_TAG"
companion object NetworkType {
/**
* Indicates this network uses a Cellular transport.
*/
const val TRANSPORT_CELLULAR = 0
/**
* Indicates this network uses a Wi-Fi transport.
*/
const val TRANSPORT_WIFI = 1
}
private var mConnectivityMgr: ConnectivityManager? = null
// private var mContext: Context? = null
private var mNetworkStateReceiver: NetworkStateReceiver? = null
/*
* boolean indicates if my device is connected to the internet or not
* */
private var mIsConnected = false
private var mConnectionMonitor: ConnectionMonitor? = null
/**
* Indicates there is no available network.
*/
private val NO_NETWORK_AVAILABLE = -1
interface ConnectionStateListener {
fun onAvailable(isAvailable: Boolean)
}
init {
mConnectivityMgr =
mContext.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
(mContext as AppCompatActivity?)!!.lifecycle.addObserver(this)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mConnectionMonitor = ConnectionMonitor()
val networkRequest = NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.build()
mConnectivityMgr!!.registerNetworkCallback(networkRequest, mConnectionMonitor!!)
}
}
/**
* Returns true if connected to the internet, and false otherwise
*
* NetworkInfo is deprecated in API 29
* https://developer.android.com/reference/android/net/NetworkInfo
*
* getActiveNetworkInfo() is deprecated in API 29
* https://developer.android.com/reference/android/net/ConnectivityManager#getActiveNetworkInfo()
*
* getNetworkInfo(int) is deprecated as of API 23
* https://developer.android.com/reference/android/net/ConnectivityManager#getNetworkInfo(int)
*/
fun isOnline(): Boolean {
mIsConnected = false
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
// Checking internet connectivity
var activeNetwork: NetworkInfo? = null
if (mConnectivityMgr != null) {
activeNetwork = mConnectivityMgr!!.activeNetworkInfo // Deprecated in API 29
}
mIsConnected = activeNetwork != null
} else {
val allNetworks = mConnectivityMgr!!.allNetworks // added in API 21 (Lollipop)
for (network in allNetworks) {
val networkCapabilities = mConnectivityMgr!!.getNetworkCapabilities(network)
if (networkCapabilities != null) {
if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) &&
networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)
)
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)
) mIsConnected = true
}
}
}
return mIsConnected
}
/**
* Returns:
*
* NO_NETWORK_AVAILABLE >>> when you're offline
* TRANSPORT_CELLULAR >> When Cellular is the active network
* TRANSPORT_WIFI >> When Wi-Fi is the Active network
*/
fun getActiveNetwork(): Int {
val activeNetwork = mConnectivityMgr!!.activeNetworkInfo // Deprecated in API 29
if (activeNetwork != null) if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
val capabilities = mConnectivityMgr!!.getNetworkCapabilities(
mConnectivityMgr!!.activeNetwork
)
if (capabilities != null) if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
// connected to mobile data
return TRANSPORT_CELLULAR
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
// connected to wifi
return TRANSPORT_WIFI
}
} else {
if (activeNetwork.type == ConnectivityManager.TYPE_MOBILE) { // Deprecated in API 28
// connected to mobile data
return TRANSPORT_CELLULAR
} else if (activeNetwork.type == ConnectivityManager.TYPE_WIFI) { // Deprecated in API 28
// connected to wifi
return TRANSPORT_WIFI
}
}
return NO_NETWORK_AVAILABLE
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
fun getAvailableNetworksCount(): Int {
var count = 0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
val allNetworks = mConnectivityMgr!!.allNetworks // added in API 21 (Lollipop)
for (network in allNetworks) {
val networkCapabilities = mConnectivityMgr!!.getNetworkCapabilities(network)
if (networkCapabilities != null) if (networkCapabilities.hasTransport(
NetworkCapabilities.TRANSPORT_WIFI
)
|| networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
) count++
}
}
return count
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
fun getAvailableNetworks(): List<Int> {
val activeNetworks: MutableList<Int> = ArrayList()
val allNetworks: Array<Network> // added in API 21 (Lollipop)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
allNetworks = mConnectivityMgr!!.allNetworks
for (network in allNetworks) {
val networkCapabilities = mConnectivityMgr!!.getNetworkCapabilities(network)
if (networkCapabilities != null) {
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) activeNetworks.add(
TRANSPORT_WIFI
)
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) activeNetworks.add(
TRANSPORT_CELLULAR
)
}
}
}
return activeNetworks
}
fun onInternetStateListener(listener: ConnectionStateListener) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
mNetworkStateReceiver = NetworkStateReceiver(listener)
val intentFilter = IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION)
mContext.registerReceiver(mNetworkStateReceiver, intentFilter)
} else {
mConnectionMonitor!!.setOnConnectionStateListener(listener)
}
}
@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
fun onDestroy() {
Log.d(TAG, "onDestroy")
(mContext as AppCompatActivity?)!!.lifecycle.removeObserver(this)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (mConnectionMonitor != null) mConnectivityMgr!!.unregisterNetworkCallback(
mConnectionMonitor!!
)
} else {
if (mNetworkStateReceiver != null) mContext.unregisterReceiver(mNetworkStateReceiver)
}
}
inner class NetworkStateReceiver(var mListener: ConnectionStateListener) :
BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
if (intent.extras != null) {
val activeNetworkInfo: NetworkInfo? =
mConnectivityMgr?.getActiveNetworkInfo() // deprecated in API 29
/*
* activeNetworkInfo.getState() deprecated in API 28
* NetworkInfo.State.CONNECTED deprecated in API 29
* */if (!mIsConnected && activeNetworkInfo != null && activeNetworkInfo.state == NetworkInfo.State.CONNECTED) {
mIsConnected = true
mListener.onAvailable(true)
} else if (intent.getBooleanExtra(
ConnectivityManager.EXTRA_NO_CONNECTIVITY,
java.lang.Boolean.FALSE
)
) {
if (!isOnline()) {
mListener.onAvailable(false)
mIsConnected = false
}
}
}
}
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
inner class ConnectionMonitor : NetworkCallback() {
private var mConnectionStateListener: ConnectionStateListener? = null
fun setOnConnectionStateListener(connectionStateListener: ConnectionStateListener?) {
mConnectionStateListener = connectionStateListener
}
override fun onAvailable(network: Network) {
if (mIsConnected) return
Log.d(TAG, "onAvailable: ")
if (mConnectionStateListener != null) {
mConnectionStateListener!!.onAvailable(true)
mIsConnected = true
}
}
override fun onLost(network: Network) {
if (getAvailableNetworksCount() == 0) {
mConnectionStateListener?.onAvailable(false)
mIsConnected = false
}
}
}
}
The accepted answer is deprecated in version 28 so here is the solution that I am using in my project.
Returns connection type. false: no Internet Connection; true: mobile data || wifi
public static boolean isNetworkConnected(Context context) {
boolean result = false;
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (cm != null) {
NetworkCapabilities capabilities = cm.getNetworkCapabilities(cm.getActiveNetwork());
if (capabilities != null) {
if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
result = true;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
result = true;
}
}
}
} else {
if (cm != null) {
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (activeNetwork != null) {
// connected to the internet
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
result = true;
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
result = true;
}
}
}
}
return result;
}
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