fix: Added network change register

app/src/main/java/org/apache/fineract/ui/online/DashboardActivity.java

@@ -1,6 +1,7 @@
 package org.apache.fineract.ui.online;
 
 import android.content.Intent;
+import android.content.IntentFilter;
 import android.os.Bundle;
 import android.os.Handler;
 
@@ -33,6 +34,7 @@
 import org.apache.fineract.ui.online.teller.TellerFragment;
 import org.apache.fineract.ui.product.ProductFragment;
 import org.apache.fineract.utils.MaterialDialog;
+import org.apache.fineract.utils.NetworkChangeReceiver;
 
 import javax.inject.Inject;
 
@@ -74,6 +76,8 @@ protected void onCreate(Bundle savedInstanceState) {
             StartSyncJob.scheduleItNow();
             preferencesHelper.setFetching(false);
         }
+
+        registerNetworkRegister();
     }
 
     public void setupNavigationBar() {
@@ -105,6 +109,12 @@ public void onDrawerSlide(View drawerView, float slideOffset) {
         actionBarDrawerToggle.syncState();
     }
 
+    public void registerNetworkRegister() {
+        IntentFilter filter = new IntentFilter();
+        filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
+        registerReceiver(new NetworkChangeReceiver(), filter);
+    }
+
     @Override
     public boolean onNavigationItemSelected(@NonNull MenuItem item) {
         clearFragmentBackStack();

app/src/main/java/org/apache/fineract/utils/NetworkChangeReceiver.java

@@ -0,0 +1,23 @@
+package org.apache.fineract.utils;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.widget.Toast;
+
+import org.apache.fineract.R;
+
+
+public class NetworkChangeReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        final ConnectivityManager connectivityManager = (ConnectivityManager) context
+                .getSystemService(Context.CONNECTIVITY_SERVICE);
+        final NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
+        if (activeNetworkInfo == null)
+            Toast.makeText(context, context.getString(R.string.toast_internet_offline),
+                    Toast.LENGTH_LONG).show();
+    }
+}

app/src/main/res/values/strings.xml

@@ -500,4 +500,5 @@
     <string name="email">Email</string>
     <string name="logged_out_successfully">Logged out successfully.</string>
     <string name="please_click_back_again_to_exit">Please click BACK again to exit</string>
+    <string name="toast_internet_offline">You are offline as you are not connected to internet.</string>
 </resources>