CheckInternet

• Manifest

<manifest >
<uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE" />
...
</manifest>

• Android 9 or Oldest

Not Realtime

ConnectivityManagercm = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
booleanisConnect = cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
Log.d(TAG, "startNetworkCalilback: "+isConnect);

• Android 10

Realtime every connection connect or not

ConnectivityManagercm = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkRequest.Builderbuilder = newNetworkRequest.Builder();
cm.registerNetworkCallback(builder.build(), newConnectivityManager.NetworkCallback(){
@OverridepublicvoidonAvailable(@NonNullNetworknetwork) {
super.onAvailable(network);
Log.d(TAG, "onAvailable: true");
}
@OverridepublicvoidonLost(@NonNullNetworknetwork) {
super.onLost(network);
Log.d(TAG, "onAvailable: false");
}
});

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Copyright 2020 M. Fadli Zein