diff --git a/pflockscreen/src/main/java/com/beautycoder/pflockscreen/fragments/PFLockScreenFragment.java b/pflockscreen/src/main/java/com/beautycoder/pflockscreen/fragments/PFLockScreenFragment.java
index db35a3f..0907038 100644
--- a/pflockscreen/src/main/java/com/beautycoder/pflockscreen/fragments/PFLockScreenFragment.java
+++ b/pflockscreen/src/main/java/com/beautycoder/pflockscreen/fragments/PFLockScreenFragment.java
@@ -65,6 +65,7 @@ public class PFLockScreenFragment extends Fragment {
     private final PFPinCodeViewModel mPFPinCodeViewModel = new PFPinCodeViewModel();
 
     private View.OnClickListener mOnLeftButtonClickListener = null;
+    private OnEncryptionInProgressListener mOnEncryptionInProgressListener = null;
 
     @Override
     public void onSaveInstanceState(@NonNull Bundle outState) {
@@ -351,11 +352,17 @@ public void onCodeNotCompleted(String code) {
     private final View.OnClickListener mOnNextButtonClickListener = new View.OnClickListener() {
         @Override
         public void onClick(View v) {
+            if (mOnEncryptionInProgressListener != null) {
+                mOnEncryptionInProgressListener.onEncryptionInProgress(true);
+            }
             mPFPinCodeViewModel.encodePin(getContext(), mCode).observe(
                     PFLockScreenFragment.this,
                     new Observer<PFResult<String>>() {
                         @Override
                         public void onChanged(@Nullable PFResult<String> result) {
+                            if (mOnEncryptionInProgressListener != null) {
+                                mOnEncryptionInProgressListener.onEncryptionInProgress(false);
+                            }
                             if (result == null) {
                                 return;
                             }
@@ -412,6 +419,10 @@ public void setOnLeftButtonClickListener(View.OnClickListener onLeftButtonClickL
         this.mOnLeftButtonClickListener = onLeftButtonClickListener;
     }
 
+    public void setOnEncryptionInProgressListener(OnEncryptionInProgressListener onEncryptionInProgressListener) {
+        this.mOnEncryptionInProgressListener = onEncryptionInProgressListener;
+    }
+
     /*private void showFingerprintAlertDialog(Context context) {
         new AlertDialog.Builder(context).setTitle("Fingerprint").setMessage(
                 "Would you like to use fingerprint for future login?")
@@ -502,6 +513,20 @@ public interface OnPFLockScreenLoginListener {
     }
 
 
+    /**
+     * Callback interface to track when encryption is in progress. You can use this to show a
+     * progress bar or other loading indicators.
+     */
+    public interface OnEncryptionInProgressListener {
+
+        /**
+         * Callback method for when encryption has started, i.e. when user taps "Next" button
+         * @param inProgress true if encryption is in progress, false if it has finished
+         */
+        void onEncryptionInProgress(boolean inProgress);
+    }
+
+
 }