修复一些列bug

android/README.md

@@ -0,0 +1,35 @@
+# Android 公示屏 APK
+
+这是景区排队叫号系统的原生 Android 薄壳，只承载两个公开页面：
+
+- 项目列表：`https://queue.nianxx.cn/admin/display`
+- 单项目展示：`https://queue.nianxx.cn/display/{项目编码或公示 Token}`
+
+## 现场能力
+
+- 无浏览器地址栏的沉浸式展示，并保持屏幕常亮
+- 接管项目卡的网页全屏请求，返回键退出全屏
+- 允许叫号音频无需额外手势播放
+- 支持上述两个 HTTPS 页面作为 Android 深链
+- 仅允许 `queue.nianxx.cn` 的公开公示路径，阻止后台、员工端、外域和明文 HTTP 导航
+- 网络或证书异常时显示原生重试页
+
+APK 仍依赖线上服务和 Android System WebView，不会把实时队列数据离线复制进安装包。
+
+## 构建
+
+需要 JDK 17+ 和 Android SDK 36（Build Tools 36.1.0）：
+
+```powershell
+$env:ANDROID_HOME = 'C:\Users\你的用户名\AppData\Local\Android\Sdk'
+.\gradlew.bat testDebugUnitTest lintDebug assembleDebug
+```
+
+可安装 APK 位于 `app/build/outputs/apk/debug/app-debug.apk`。Debug APK 适合现场安装验证；正式发布前应使用单位自有密钥生成签名 Release APK。
+
+## 安装与深链验证
+
+```powershell
+& "$env:ANDROID_HOME\platform-tools\adb.exe" install -r .\app\build\outputs\apk\debug\app-debug.apk
+& "$env:ANDROID_HOME\platform-tools\adb.exe" shell am start -a android.intent.action.VIEW -d 'https://queue.nianxx.cn/display/YYHHC'
+```

android/app/build.gradle

@@ -0,0 +1,38 @@
+plugins {
+    id("com.android.application")
+}
+
+android {
+    namespace = "cn.nianxx.queue.display"
+    compileSdk = 36
+    buildToolsVersion = "36.1.0"
+
+    defaultConfig {
+        applicationId = "cn.nianxx.queue.display"
+        minSdk = 23
+        targetSdk = 36
+        versionCode = 1
+        versionName = "1.0.0"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled = false
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    testOptions {
+        unitTests {
+            returnDefaultValues = true
+        }
+    }
+}
+
+dependencies {
+    testImplementation("junit:junit:4.13.2")
+}

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-feature android:name="android.hardware.touchscreen" android:required="false" />
+
+    <application
+        android:allowBackup="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:hardwareAccelerated="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:roundIcon="@drawable/ic_launcher"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.XQKQueue"
+        android:usesCleartextTraffic="false"
+        tools:targetApi="s">
+        <activity
+            android:name=".MainActivity"
+            android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize|uiMode"
+            android:exported="true"
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <intent-filter android:autoVerify="false">
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:scheme="https" />
+                <data android:host="queue.nianxx.cn" />
+                <data android:path="/admin/display" />
+                <data android:pathPrefix="/display/" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

android/app/src/main/java/cn/nianxx/queue/display/MainActivity.java

@@ -0,0 +1,403 @@
+package cn.nianxx.queue.display;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.graphics.Color;
+import android.net.http.SslError;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.Gravity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.WindowInsets;
+import android.view.WindowInsetsController;
+import android.view.WindowManager;
+import android.webkit.CookieManager;
+import android.webkit.PermissionRequest;
+import android.webkit.SslErrorHandler;
+import android.webkit.WebChromeClient;
+import android.webkit.WebResourceError;
+import android.webkit.WebResourceRequest;
+import android.webkit.WebResourceResponse;
+import android.webkit.WebSettings;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+import android.widget.Button;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public final class MainActivity extends Activity {
+    private FrameLayout root;
+    private WebView webView;
+    private ProgressBar progressBar;
+    private LinearLayout errorView;
+    private TextView errorDetail;
+    private View customView;
+    private WebChromeClient.CustomViewCallback customViewCallback;
+    private String lastAllowedUrl = NavigationPolicy.START_URL;
+    private boolean mainFrameFailed;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        configureWindow();
+        buildContentView();
+        setContentView(root);
+        registerPredictiveBackCallback();
+
+        String initialUrl = NavigationPolicy.initialUrlOrStart(getIntent().getDataString());
+        lastAllowedUrl = initialUrl;
+        webView.loadUrl(initialUrl);
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        setIntent(intent);
+        String target = NavigationPolicy.initialUrlOrStart(intent.getDataString());
+        exitWebFullscreen();
+        if (!target.equals(webView.getUrl())) {
+            webView.loadUrl(target);
+        }
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        webView.onResume();
+        enterImmersiveMode();
+    }
+
+    @Override
+    protected void onPause() {
+        webView.onPause();
+        super.onPause();
+    }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus) {
+        super.onWindowFocusChanged(hasFocus);
+        if (hasFocus) {
+            enterImmersiveMode();
+        }
+    }
+
+    @Override
+    @SuppressLint("GestureBackNavigation")
+    @SuppressWarnings("deprecation")
+    public void onBackPressed() {
+        handleBackNavigation();
+    }
+
+    private void handleBackNavigation() {
+        if (customView != null) {
+            exitWebFullscreen();
+            return;
+        }
+        if (webView.canGoBack()) {
+            webView.goBack();
+            return;
+        }
+        if (NavigationPolicy.isProjectDisplay(lastAllowedUrl)) {
+            webView.loadUrl(NavigationPolicy.START_URL);
+            return;
+        }
+        finishAfterTransition();
+    }
+
+    private void registerPredictiveBackCallback() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            getOnBackInvokedDispatcher().registerOnBackInvokedCallback(
+                    android.window.OnBackInvokedDispatcher.PRIORITY_DEFAULT,
+                    this::handleBackNavigation);
+        }
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (customView != null) {
+            root.removeView(customView);
+            customView = null;
+            if (customViewCallback != null) {
+                customViewCallback.onCustomViewHidden();
+                customViewCallback = null;
+            }
+        }
+        root.removeView(webView);
+        webView.stopLoading();
+        webView.setWebChromeClient(null);
+        webView.setWebViewClient(null);
+        webView.destroy();
+        super.onDestroy();
+    }
+
+    private void configureWindow() {
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN
+                | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+        enterImmersiveMode();
+    }
+
+    @SuppressWarnings("deprecation")
+    private void enterImmersiveMode() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            getWindow().setDecorFitsSystemWindows(false);
+            WindowInsetsController controller = getWindow().getInsetsController();
+            if (controller != null) {
+                controller.hide(WindowInsets.Type.systemBars());
+                controller.setSystemBarsBehavior(
+                        WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
+            }
+            return;
+        }
+        getWindow().getDecorView().setSystemUiVisibility(
+                View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+                        | View.SYSTEM_UI_FLAG_FULLSCREEN
+                        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
+                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                        | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
+    }
+
+    private void buildContentView() {
+        root = new FrameLayout(this);
+        root.setBackgroundColor(Color.BLACK);
+
+        webView = createWebView();
+        root.addView(webView, matchParent());
+
+        progressBar = new ProgressBar(this);
+        FrameLayout.LayoutParams progressLayout = new FrameLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT,
+                ViewGroup.LayoutParams.WRAP_CONTENT,
+                Gravity.CENTER);
+        root.addView(progressBar, progressLayout);
+
+        errorView = createErrorView();
+        errorView.setVisibility(View.GONE);
+        root.addView(errorView, matchParent());
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    @SuppressWarnings("deprecation")
+    private WebView createWebView() {
+        WebView view = new WebView(this);
+        view.setBackgroundColor(Color.BLACK);
+        view.setOverScrollMode(View.OVER_SCROLL_NEVER);
+        view.setLongClickable(false);
+        view.setOnLongClickListener(ignored -> true);
+
+        boolean debuggable = (getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0;
+        WebView.setWebContentsDebuggingEnabled(debuggable);
+
+        WebSettings settings = view.getSettings();
+        settings.setJavaScriptEnabled(true);
+        settings.setDomStorageEnabled(true);
+        settings.setMediaPlaybackRequiresUserGesture(false);
+        settings.setJavaScriptCanOpenWindowsAutomatically(false);
+        settings.setSupportMultipleWindows(false);
+        settings.setAllowFileAccess(false);
+        settings.setAllowContentAccess(false);
+        settings.setGeolocationEnabled(false);
+        settings.setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
+        settings.setCacheMode(WebSettings.LOAD_DEFAULT);
+        settings.setUserAgentString(settings.getUserAgentString() + " XQKQueueDisplay/1.0");
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            settings.setSafeBrowsingEnabled(true);
+        }
+
+        CookieManager cookieManager = CookieManager.getInstance();
+        cookieManager.setAcceptCookie(true);
+        cookieManager.setAcceptThirdPartyCookies(view, false);
+
+        view.setWebViewClient(new DisplayWebViewClient());
+        view.setWebChromeClient(new DisplayWebChromeClient());
+        return view;
+    }
+
+    private LinearLayout createErrorView() {
+        LinearLayout panel = new LinearLayout(this);
+        panel.setOrientation(LinearLayout.VERTICAL);
+        panel.setGravity(Gravity.CENTER);
+        panel.setPadding(dp(32), dp(32), dp(32), dp(32));
+        panel.setBackgroundColor(Color.rgb(245, 248, 246));
+
+        TextView title = new TextView(this);
+        title.setText(R.string.page_unavailable_title);
+        title.setTextColor(Color.rgb(24, 54, 44));
+        title.setTextSize(24);
+        title.setGravity(Gravity.CENTER);
+        title.setTypeface(title.getTypeface(), android.graphics.Typeface.BOLD);
+        panel.addView(title, wrapContentWithBottomMargin(dp(12)));
+
+        errorDetail = new TextView(this);
+        errorDetail.setText(R.string.page_unavailable_detail);
+        errorDetail.setTextColor(Color.rgb(67, 88, 81));
+        errorDetail.setTextSize(16);
+        errorDetail.setGravity(Gravity.CENTER);
+        panel.addView(errorDetail, wrapContentWithBottomMargin(dp(24)));
+
+        Button retry = new Button(this);
+        retry.setText(R.string.retry);
+        retry.setTextColor(Color.WHITE);
+        retry.setBackgroundColor(Color.rgb(15, 107, 77));
+        retry.setOnClickListener(ignored -> {
+            showLoading();
+            webView.loadUrl(NavigationPolicy.initialUrlOrStart(lastAllowedUrl));
+        });
+        panel.addView(retry, new LinearLayout.LayoutParams(dp(160), dp(52)));
+        return panel;
+    }
+
+    private void showLoading() {
+        mainFrameFailed = false;
+        errorView.setVisibility(View.GONE);
+        progressBar.setVisibility(View.VISIBLE);
+    }
+
+    private void showError(int messageResource) {
+        mainFrameFailed = true;
+        progressBar.setVisibility(View.GONE);
+        errorDetail.setText(messageResource);
+        errorView.setVisibility(View.VISIBLE);
+    }
+
+    private void exitWebFullscreen() {
+        if (customView == null) {
+            return;
+        }
+        root.removeView(customView);
+        customView = null;
+        webView.setVisibility(View.VISIBLE);
+        if (customViewCallback != null) {
+            WebChromeClient.CustomViewCallback callback = customViewCallback;
+            customViewCallback = null;
+            callback.onCustomViewHidden();
+        }
+        enterImmersiveMode();
+    }
+
+    private FrameLayout.LayoutParams matchParent() {
+        return new FrameLayout.LayoutParams(
+                ViewGroup.LayoutParams.MATCH_PARENT,
+                ViewGroup.LayoutParams.MATCH_PARENT);
+    }
+
+    private LinearLayout.LayoutParams wrapContentWithBottomMargin(int bottomMargin) {
+        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT,
+                ViewGroup.LayoutParams.WRAP_CONTENT);
+        params.bottomMargin = bottomMargin;
+        return params;
+    }
+
+    private int dp(int value) {
+        return Math.round(value * getResources().getDisplayMetrics().density);
+    }
+
+    private final class DisplayWebViewClient extends WebViewClient {
+        @Override
+        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
+            if (!request.isForMainFrame()) {
+                return false;
+            }
+            return blockIfOutsideApp(request.getUrl().toString());
+        }
+
+        @Override
+        @SuppressWarnings("deprecation")
+        public boolean shouldOverrideUrlLoading(WebView view, String url) {
+            return blockIfOutsideApp(url);
+        }
+
+        private boolean blockIfOutsideApp(String url) {
+            if (NavigationPolicy.isAllowed(url)) {
+                return false;
+            }
+            Toast.makeText(MainActivity.this, R.string.blocked_navigation, Toast.LENGTH_SHORT).show();
+            return true;
+        }
+
+        @Override
+        public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) {
+            if (NavigationPolicy.isAllowed(url)) {
+                lastAllowedUrl = url;
+            }
+            showLoading();
+        }
+
+        @Override
+        public void onPageFinished(WebView view, String url) {
+            progressBar.setVisibility(View.GONE);
+            if (!mainFrameFailed) {
+                errorView.setVisibility(View.GONE);
+            }
+        }
+
+        @Override
+        public void onReceivedError(
+                WebView view,
+                WebResourceRequest request,
+                WebResourceError error) {
+            if (request.isForMainFrame()) {
+                showError(R.string.page_unavailable_detail);
+            }
+        }
+
+        @Override
+        public void onReceivedHttpError(
+                WebView view,
+                WebResourceRequest request,
+                WebResourceResponse errorResponse) {
+            if (request.isForMainFrame() && errorResponse.getStatusCode() >= 400) {
+                showError(R.string.page_unavailable_detail);
+            }
+        }
+
+        @Override
+        public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
+            handler.cancel();
+            showError(R.string.ssl_error);
+        }
+    }
+
+    private final class DisplayWebChromeClient extends WebChromeClient {
+        @Override
+        public void onProgressChanged(WebView view, int newProgress) {
+            if (!mainFrameFailed && newProgress < 100 && customView == null) {
+                progressBar.setVisibility(View.VISIBLE);
+            } else if (newProgress == 100) {
+                progressBar.setVisibility(View.GONE);
+            }
+        }
+
+        @Override
+        public void onShowCustomView(View view, CustomViewCallback callback) {
+            if (customView != null) {
+                callback.onCustomViewHidden();
+                return;
+            }
+            customView = view;
+            customViewCallback = callback;
+            webView.setVisibility(View.GONE);
+            progressBar.setVisibility(View.GONE);
+            errorView.setVisibility(View.GONE);
+            root.addView(customView, matchParent());
+            enterImmersiveMode();
+        }
+
+        @Override
+        public void onHideCustomView() {
+            exitWebFullscreen();
+        }
+
+        @Override
+        public void onPermissionRequest(PermissionRequest request) {
+            request.deny();
+        }
+    }
+}

android/app/src/main/java/cn/nianxx/queue/display/NavigationPolicy.java

@@ -0,0 +1,61 @@
+package cn.nianxx.queue.display;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.regex.Pattern;
+
+final class NavigationPolicy {
+    static final String START_URL = "https://queue.nianxx.cn/admin/display";
+
+    private static final String HOST = "queue.nianxx.cn";
+    private static final String DISPLAY_PREFIX = "/display/";
+    private static final Pattern DISPLAY_IDENTIFIER = Pattern.compile("[A-Za-z0-9_-]{2,128}");
+
+    private NavigationPolicy() {
+    }
+
+    static String initialUrlOrStart(String candidate) {
+        return isAllowed(candidate) ? candidate : START_URL;
+    }
+
+    static boolean isAllowed(String candidate) {
+        URI uri = parse(candidate);
+        if (uri == null
+                || !"https".equalsIgnoreCase(uri.getScheme())
+                || !HOST.equalsIgnoreCase(uri.getHost())
+                || uri.getRawUserInfo() != null
+                || (uri.getPort() != -1 && uri.getPort() != 443)) {
+            return false;
+        }
+
+        String path = uri.getRawPath();
+        if ("/admin/display".equals(path)) {
+            return true;
+        }
+        if (path == null || !path.startsWith(DISPLAY_PREFIX)) {
+            return false;
+        }
+
+        String identifier = path.substring(DISPLAY_PREFIX.length());
+        return DISPLAY_IDENTIFIER.matcher(identifier).matches();
+    }
+
+    static boolean isProjectDisplay(String candidate) {
+        URI uri = parse(candidate);
+        return isAllowed(candidate)
+                && uri != null
+                && uri.getRawPath() != null
+                && uri.getRawPath().startsWith(DISPLAY_PREFIX);
+    }
+
+    private static URI parse(String candidate) {
+        if (candidate == null || candidate.isBlank()) {
+            return null;
+        }
+        try {
+            return new URI(candidate);
+        } catch (URISyntaxException ignored) {
+            return null;
+        }
+    }
+}

android/app/src/main/res/drawable/ic_launcher.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#0F6B4D"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#D8F0E6"
+        android:pathData="M16,73L36,42L48,57L63,33L93,73Z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M16,74L39,54L50,65L65,48L94,74Z" />
+    <path
+        android:fillColor="@android:color/transparent"
+        android:pathData="M18,82C32,75 43,88 57,81C70,75 80,86 92,79"
+        android:strokeColor="#D8F0E6"
+        android:strokeLineCap="round"
+        android:strokeWidth="5" />
+</vector>

android/app/src/main/res/values/strings.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">景区排队叫号大屏</string>
+    <string name="page_unavailable_title">页面暂时无法连接</string>
+    <string name="page_unavailable_detail">请检查网络连接后重试</string>
+    <string name="retry">重新加载</string>
+    <string name="blocked_navigation">已阻止离开公示页面</string>
+    <string name="ssl_error">安全连接校验失败，请联系管理员</string>
+</resources>

android/app/src/main/res/values/styles.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.XQKQueue" parent="android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:fontFamily">sans</item>
+        <item name="android:windowActionModeOverlay">true</item>
+        <item name="android:windowFullscreen">true</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:colorAccent">#0F6B4D</item>
+        <item name="android:navigationBarColor">#000000</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+        <item name="android:windowLightStatusBar">false</item>
+    </style>
+</resources>

android/app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <exclude domain="root" path="." />
+    <exclude domain="file" path="." />
+    <exclude domain="database" path="." />
+    <exclude domain="sharedpref" path="." />
+</full-backup-content>

android/app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup>
+        <exclude domain="root" path="." />
+        <exclude domain="file" path="." />
+        <exclude domain="database" path="." />
+        <exclude domain="sharedpref" path="." />
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="root" path="." />
+        <exclude domain="file" path="." />
+        <exclude domain="database" path="." />
+        <exclude domain="sharedpref" path="." />
+    </device-transfer>
+</data-extraction-rules>

android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <base-config cleartextTrafficPermitted="false">
+        <trust-anchors>
+            <certificates src="system" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>

android/app/src/test/java/cn/nianxx/queue/display/NavigationPolicyTest.java

@@ -0,0 +1,50 @@
+package cn.nianxx.queue.display;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public final class NavigationPolicyTest {
+    @Test
+    public void allowsOnlyTheTwoPublicPageFamilies() {
+        assertTrue(NavigationPolicy.isAllowed("https://queue.nianxx.cn/admin/display"));
+        assertTrue(NavigationPolicy.isAllowed("https://queue.nianxx.cn:443/admin/display"));
+        assertTrue(NavigationPolicy.isAllowed("https://queue.nianxx.cn/display/YYHHC"));
+        assertTrue(NavigationPolicy.isAllowed(
+                "https://queue.nianxx.cn/display/0123456789abcdef0123456789abcdef01234567"));
+
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn/admin"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn/staff"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn/display/YYHHC/extra"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn/display/X"));
+    }
+
+    @Test
+    public void rejectsUntrustedOrAmbiguousUrls() {
+        assertFalse(NavigationPolicy.isAllowed("http://queue.nianxx.cn/admin/display"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn.evil.test/display/YYHHC"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn@evil.test/display/YYHHC"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn:444/display/YYHHC"));
+        assertFalse(NavigationPolicy.isAllowed("https://queue.nianxx.cn/display/YY%2FHHC"));
+        assertFalse(NavigationPolicy.isAllowed("not a url"));
+        assertFalse(NavigationPolicy.isAllowed(null));
+    }
+
+    @Test
+    public void fallsBackToTheProjectListForInvalidDeepLinks() {
+        assertEquals(
+                NavigationPolicy.START_URL,
+                NavigationPolicy.initialUrlOrStart("https://example.com/display/YYHHC"));
+        assertEquals(
+                "https://queue.nianxx.cn/display/YYHHC",
+                NavigationPolicy.initialUrlOrStart("https://queue.nianxx.cn/display/YYHHC"));
+    }
+
+    @Test
+    public void identifiesDirectProjectDisplaysForBackNavigation() {
+        assertTrue(NavigationPolicy.isProjectDisplay("https://queue.nianxx.cn/display/YYHHC"));
+        assertFalse(NavigationPolicy.isProjectDisplay(NavigationPolicy.START_URL));
+    }
+}

android/build.gradle

@@ -0,0 +1,3 @@
+plugins {
+    id "com.android.application" version "9.2.0" apply false
+}

android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+org.gradle.configuration-cache=true
+android.nonTransitiveRClass=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-all.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

android/gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# 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
+#
+#      https://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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/2d6327017519d23b96af35865dc997fcb544fb40/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

android/gradlew.bat

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/settings.gradle

@@ -0,0 +1,18 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "XQKQueueDisplay"
+include(":app")