[url_launcher_android] Fix WebView content obscured by navigation bar on Android 15+

packages/url_launcher/url_launcher_android/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## NEXT
 
 * Updates minimum supported SDK version to Flutter 3.38/Dart 3.10.
+* Fixes WebView content being obscured by system navigation bar on Android 15+
 
 ## 6.3.30
 

packages/url_launcher/url_launcher_android/android/src/main/java/io/flutter/plugins/urllauncher/WebViewActivity.java

@@ -21,6 +21,9 @@
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.core.content.ContextCompat;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
@@ -90,6 +93,15 @@ public void onCreate(@Nullable Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     webview = new WebView(this);
     setContentView(webview);
+    // Apply system window insets as padding to prevent WebView content
+// from being obscured by system bars (e.g. navigation bar) on Android 15+.
+    ViewCompat.setOnApplyWindowInsetsListener(
+        webview,
+        (v, insets) -> {
+          Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+          v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
+          return insets;
+        });
     // Get the Intent that started this activity and extract the string
     final Intent intent = getIntent();
     final String url = intent.getStringExtra(URL_EXTRA);

packages/url_launcher/url_launcher_android/android/src/test/java/io/flutter/plugins/urllauncher/WebViewActivityTest.java

@@ -1,17 +1,41 @@
 // Copyright 2013 The Flutter Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-
 package io.flutter.plugins.urllauncher;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 
+import android.os.Bundle;
+import androidx.test.core.app.ApplicationProvider;
 import java.util.Collections;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricTestRunner;
 
+@RunWith(RobolectricTestRunner.class)
 public class WebViewActivityTest {
+
   @Test
   public void extractHeaders_returnsEmptyMapWhenHeadersBundleNull() {
     assertEquals(WebViewActivity.extractHeaders(null), Collections.emptyMap());
   }
+
+  @Test
+  public void onCreate_webviewIsNotNull() {
+    WebViewActivity activity =
+        Robolectric.buildActivity(
+                WebViewActivity.class,
+                WebViewActivity.createIntent(
+                    ApplicationProvider.getApplicationContext(),
+                    "https://flutter.dev",
+                    false,
+                    false,
+                    new Bundle()))
+            .create()
+            .get();
+
+    assertNotNull(activity.webview);
+  }
 }