Progress Bar Added

app/src/main/java/com/sultan/plantdatabse/WebViewActivity.java

@@ -2,12 +2,16 @@ package com.sultan.plantdatabse;
 
 import android.annotation.SuppressLint;
 import android.content.Intent;
+import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.os.Vibrator;
 import android.view.View;
+import android.webkit.WebResourceError;
+import android.webkit.WebResourceRequest;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.Button;
+import android.widget.ProgressBar;
 import android.widget.Toast;
 
 import androidx.annotation.Nullable;
@@ -18,6 +22,7 @@ import com.google.zxing.integration.android.IntentResult;
 
 public class WebViewActivity extends AppCompatActivity implements View.OnClickListener {
 
+    private ProgressBar progressBar;
     Button scanAgainButton;
     Button btnHome;
 
@@ -29,6 +34,7 @@ public class WebViewActivity extends AppCompatActivity implements View.OnClickLi
 
         scanAgainButton = findViewById(R.id.scanAgain);
         btnHome = findViewById(R.id.btnHome);
+        progressBar = findViewById(R.id.progressBar);
 
         // Retrieve the URL from the intent
         String url = getIntent().getStringExtra("url");
@@ -36,7 +42,26 @@ public class WebViewActivity extends AppCompatActivity implements View.OnClickLi
         // Load the URL in the WebView
         WebView webView = findViewById(R.id.webView);
         webView.getSettings().setJavaScriptEnabled(true);
-        webView.setWebViewClient(new WebViewClient());
+        webView.setWebViewClient(new WebViewClient() {
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                // Show the progress bar when the page starts loading
+                progressBar.setVisibility(View.VISIBLE);
+            }
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                // Hide the progress bar when the page finishes loading
+                progressBar.setVisibility(View.INVISIBLE);
+            }
+
+            @Override
+            public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
+                // Handle page load error
+                Toast.makeText(WebViewActivity.this, "Failed to load the page", Toast.LENGTH_SHORT).show();
+                progressBar.setVisibility(View.INVISIBLE);
+            }
+        });
+
         assert url != null;
         webView.loadUrl(url);
 
@@ -45,6 +70,16 @@ public class WebViewActivity extends AppCompatActivity implements View.OnClickLi
         btnHome.setOnClickListener(this);
     }
 
+    @Override
+    public void onBackPressed() {
+        WebView webView = findViewById(R.id.webView);
+        if (webView.canGoBack()) {
+            webView.goBack();
+        } else {
+            super.onBackPressed();
+        }
+    }
+
     @Override
     public void onClick(View v) {
         if (v.getId() == R.id.scanAgain) {

app/src/main/res/layout/activity_webview.xml

@@ -11,6 +11,23 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
+    <ProgressBar
+        android:id="@+id/progressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:visibility="gone" />
+
+    <com.airbnb.lottie.LottieAnimationView
+        android:id="@+id/lottieAnimationView"
+        android:layout_width="80dp"
+        android:layout_height="80dp"
+        android:layout_centerInParent="true"
+        app:lottie_autoPlay="true"
+        app:lottie_fileName="loading.json"
+        app:lottie_loop="true"
+        android:visibility="invisible" />
+
     <Button
         android:id="@+id/scanAgain"
         android:layout_width="wrap_content"