feat: Add Jetpack Webkit snippet

WebOnAndroid/JetpackWebkit.md

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Correct the package name to match your project's namespace
+package com.example.jetpackwebkit
+
+import android.os.Bundle
+import android.util.Log
+import android.webkit.WebView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.webkit.WebSettingsCompat
+import androidx.webkit.WebViewFeature
+
+/**
+ * This sample demonstrates how to enable the FORCE_DARK feature for an Android WebView
+ * using androidx.webkit APIs, with a check for feature support. It showcases the
+ * modern and idiomatic way to configure WebView settings.
+ */
+// Correct the class name to match the AndroidManifest.xml entry
+class MainActivity : AppCompatActivity() {
+
+    private val TAG = "MainActivity"
+    private lateinit var webView: WebView
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        // You will need to create this layout file in `res/layout/`
+        setContentView(R.layout.activity_webview_dark_mode)
+
+        webView = findViewById(R.id.my_webview)
+
+        configureWebViewDarkMode()
+
+        webView.loadUrl("https://developer.android.com")
+    }
+
+    private fun configureWebViewDarkMode() {
+        Log.d(TAG, "Attempting to configure WebView dark mode.")
+
+        if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
+            WebSettingsCompat.setForceDark(webView.settings, WebSettingsCompat.FORCE_DARK_ON)
+            Log.d(TAG, "WebViewFeature.FORCE_DARK is supported and enabled.")
+        } else {
+            Log.d(TAG, "WebViewFeature.FORCE_DARK is NOT supported on this device.")
+        }
+    }
+}