feat: Implement fullscreen WebView for vshare with theme auto-adaptation

app/src/main/AndroidManifest.xml

@@ -146,6 +146,11 @@
             android:exported="true"
             android:label="添加附言" />
         <activity android:name=".general.PageHost" />
+        <activity
+            android:name=".module.vshare.VshareWebActivity"
+            android:exported="false"
+            android:theme="@style/NoneSlideBackableTheme"
+            android:configChanges="orientation|keyboardHidden|screenSize" />
     </application>
 
 </manifest>

app/src/main/java/me/ghui/v2er/module/home/MainActivity.java

@@ -254,7 +254,7 @@ protected void init() {
                     Navigator.from(getContext()).to(CreateTopicActivity.class).start();
                     break;
                 case R.id.vshare_nav_item:
-                    Utils.openInBrowser("https://v2er.app/vshare", getContext());
+                    me.ghui.v2er.module.vshare.VshareWebActivity.open(getContext());
                     mVshareVersionChecker.markAsViewed();
                     updateVshareBadge();
                     break;

app/src/main/java/me/ghui/v2er/module/vshare/VshareWebActivity.java

@@ -0,0 +1,173 @@
+package me.ghui.v2er.module.vshare;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.os.Bundle;
+import android.view.View;
+import android.webkit.WebChromeClient;
+import android.webkit.WebResourceRequest;
+import android.webkit.WebSettings;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+import android.widget.ProgressBar;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import me.ghui.v2er.R;
+import me.ghui.v2er.util.DarkModelUtils;
+
+/**
+ * Fullscreen WebView Activity for displaying vshare page
+ * with automatic theme adaptation
+ */
+public class VshareWebActivity extends AppCompatActivity {
+
+    private static final String VSHARE_BASE_URL = "https://v2er.app/vshare";
+
+    @BindView(R.id.webview)
+    WebView mWebView;
+
+    @BindView(R.id.progress_bar)
+    ProgressBar mProgressBar;
+
+    public static void open(Context context) {
+        Intent intent = new Intent(context, VshareWebActivity.class);
+        context.startActivity(intent);
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Hide action bar if present
+        if (getSupportActionBar() != null) {
+            getSupportActionBar().hide();
+        }
+
+        // Set SystemUI flags to match MainActivity's edge-to-edge behavior
+        View decorView = getWindow().getDecorView();
+        int systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
+
+        // Set status bar icon color based on theme
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
+            if (!DarkModelUtils.isDarkMode()) {
+                // Light mode: use dark status bar icons
+                systemUiVisibility |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
+            }
+        }
+
+        decorView.setSystemUiVisibility(systemUiVisibility);
+
+        setContentView(R.layout.activity_vshare_web);
+        ButterKnife.bind(this);
+
+        setupWebView();
+
+        // Compute URL with theme parameter based on current app theme
+        String url = VSHARE_BASE_URL;
+        if (DarkModelUtils.isDarkMode()) {
+            url += "?theme=dark";
+        } else {
+            url += "?theme=light";
+        }
+        mWebView.loadUrl(url);
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private void setupWebView() {
+        WebSettings settings = mWebView.getSettings();
+
+        // Enable JavaScript
+        settings.setJavaScriptEnabled(true);
+
+        // Enable DOM storage
+        settings.setDomStorageEnabled(true);
+
+        // Disable file and content access for security
+        settings.setAllowFileAccess(false);
+        settings.setAllowContentAccess(false);
+
+        // Enable Safe Browsing if API >= 26
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            settings.setSafeBrowsingEnabled(true);
+        }
+
+        // Enable responsive layout
+        settings.setUseWideViewPort(true);
+        settings.setLoadWithOverviewMode(true);
+
+        // Enable zoom
+        settings.setSupportZoom(true);
+        settings.setBuiltInZoomControls(true);
+        settings.setDisplayZoomControls(false);
+
+        // Set cache mode
+        settings.setCacheMode(WebSettings.LOAD_DEFAULT);
+
+        // Set WebViewClient to handle navigation
+        mWebView.setWebViewClient(new WebViewClient() {
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
+                // Let the WebView handle the navigation
+                return false;
+            }
+
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                super.onPageStarted(view, url, favicon);
+                mProgressBar.setVisibility(View.VISIBLE);
+            }
+
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                super.onPageFinished(view, url);
+
+                // Inject CSS to ensure proper theme is applied
+                String theme = DarkModelUtils.isDarkMode() ? "dark" : "light";
+                String js = "javascript:(function() { " +
+                        "document.documentElement.setAttribute('data-theme', '" + theme + "'); " +
+                        "})()";
+                mWebView.loadUrl(js);
+            }
+        });
+
+        // Set WebChromeClient for progress updates
+        mWebView.setWebChromeClient(new WebChromeClient() {
+            @Override
+            public void onProgressChanged(WebView view, int newProgress) {
+                mProgressBar.setProgress(newProgress);
+                if (newProgress == 100) {
+                    mProgressBar.setVisibility(View.GONE);
+                }
+            }
+        });
+    }
+
+    @Override
+    public void onBackPressed() {
+        // Handle back navigation in WebView
+        if (mWebView.canGoBack()) {
+            mWebView.goBack();
+        } else {
+            super.onBackPressed();
+        }
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (mWebView != null) {
+            mWebView.clearHistory();
+            mWebView.clearCache(false);
+            mWebView.loadUrl("about:blank");
+            mWebView.pauseTimers();
+            mWebView.destroy();
+        }
+        super.onDestroy();
+    }
+}

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

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@android:color/transparent">
+
+    <WebView
+        android:id="@+id/webview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <ProgressBar
+        android:id="@+id/progress_bar"
+        style="?android:attr/progressBarStyleHorizontal"
+        android:layout_width="match_parent"
+        android:layout_height="3dp"
+        android:layout_gravity="top"
+        android:progressTint="@color/colorAccent"
+        android:visibility="gone" />
+
+</FrameLayout>