feat: 4ma 用车计时助手 v1.0

- 无障碍服务监听7MA出行小程序，匹配关键词自动开始/结束计时
- 事件驱动截图+ML Kit离线中文OCR兜底，解决WebView无障碍树不稳定
- 常驻计时通知(15/18/30分钟提醒)与结束用车按钮
- 浅色主题主界面：权限状态、具体实现、安全/免责/法律声明
- 电池白名单+自启动引导+onUnbind自动重绑守护
- 无网络权限，完全离线运行

app/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    namespace 'com.example.accessibilityhelper'
+    compileSdk 35
+
+    defaultConfig {
+        applicationId "com.example.accessibilityhelper"
+        minSdk 26
+        targetSdk 35
+        versionCode 1
+        versionName "1.0"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+}
+
+dependencies {
+    // 离线中文 OCR（截图兜底），模型随 APK 打包，无需 Google Play 服务
+    implementation 'com.google.mlkit:text-recognition-chinese:16.0.1'
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <!-- Android 13+ 需要通知运行时权限 -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <!-- 请求加入电池优化白名单（后台守护） -->
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+    <!-- 移除 ML Kit 传递依赖带入的网络权限，保证完全离线 -->
+    <uses-permission android:name="android.permission.INTERNET" tools:node="remove" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" tools:node="remove" />
+
+    <application
+        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme">
+
+        <!-- 入口 Activity：用于打开系统无障碍设置 -->
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <!-- 无障碍服务声明 -->
+        <service
+            android:name=".MyAccessibilityService"
+            android:enabled="true"
+            android:exported="true"
+            android:label="@string/accessibility_service_label"
+            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
+            <intent-filter>
+                <action android:name="android.accessibilityservice.AccessibilityService" />
+            </intent-filter>
+            <meta-data
+                android:name="android.accessibilityservice"
+                android:resource="@xml/accessibility_service_config" />
+        </service>
+
+        <!-- 通知栏「结束用车」按钮的广播接收器 -->
+        <receiver
+            android:name=".EndRideReceiver"
+            android:exported="false" />
+    </application>
+
+</manifest>

app/src/main/java/com/example/accessibilityhelper/EndRideReceiver.java

@@ -0,0 +1,19 @@
+package com.example.accessibilityhelper;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+/**
+ * 处理「用车中」常驻通知上的「结束用车」按钮。
+ * 收到广播后调用 RideSessionManager 结束计时并清除通知。
+ */
+public class EndRideReceiver extends BroadcastReceiver {
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        if (intent != null && RideSessionManager.ACTION_END_RIDE.equals(intent.getAction())) {
+            RideSessionManager.getInstance().end();
+        }
+    }
+}

app/src/main/java/com/example/accessibilityhelper/MainActivity.java

@@ -0,0 +1,185 @@
+package com.example.accessibilityhelper;
+
+import android.Manifest;
+import android.app.Activity;
+import android.app.NotificationManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.widget.TextView;
+import android.widget.Toast;
+
+/**
+ * 主界面：
+ *  - 展示无障碍 / 通知 / 电池白名单等权限状态，点击可跳转开启；
+ *  - 引导开启 Vivo 自启动，保障后台常驻守护；
+ *  - 展示具体实现说明、安全性声明、免责声明与法律声明。
+ */
+public class MainActivity extends Activity {
+
+    private static final int REQ_NOTIFICATION_PERMISSION = 100;
+
+    private TextView tvA11yStatus;
+    private TextView tvNotifStatus;
+    private TextView tvBatteryStatus;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        tvA11yStatus = findViewById(R.id.status_a11y);
+        tvNotifStatus = findViewById(R.id.status_notif);
+        tvBatteryStatus = findViewById(R.id.status_battery);
+
+        findViewById(R.id.row_a11y).setOnClickListener(v -> {
+            try {
+                startActivity(new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS));
+            } catch (Exception e) {
+                toast("无法打开无障碍设置");
+            }
+        });
+
+        findViewById(R.id.row_notif).setOnClickListener(v -> {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
+                    && checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS)
+                    != PackageManager.PERMISSION_GRANTED) {
+                requestPermissions(
+                        new String[]{Manifest.permission.POST_NOTIFICATIONS},
+                        REQ_NOTIFICATION_PERMISSION);
+            } else {
+                try {
+                    Intent i = new Intent(Settings.ACTION_APP_NOTIFICATION_SETTINGS)
+                            .putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
+                    startActivity(i);
+                } catch (Exception e) {
+                    toast("无法打开通知设置");
+                }
+            }
+        });
+
+        findViewById(R.id.row_battery).setOnClickListener(v -> {
+            PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
+            if (pm != null && pm.isIgnoringBatteryOptimizations(getPackageName())) {
+                toast("已在电池优化白名单中");
+                return;
+            }
+            try {
+                Intent i = new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS,
+                        Uri.parse("package:" + getPackageName()));
+                startActivity(i);
+            } catch (Exception e) {
+                try {
+                    startActivity(new Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS));
+                } catch (Exception e2) {
+                    toast("无法打开电池优化设置");
+                }
+            }
+        });
+
+        findViewById(R.id.row_autostart).setOnClickListener(v -> openVivoAutostart());
+
+        // Android 13+：首次进入申请通知权限
+        requestNotificationPermissionIfNeeded();
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        refreshStatuses();
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        refreshStatuses();
+    }
+
+    private void refreshStatuses() {
+        setStatus(tvA11yStatus, isAccessibilityOn());
+        setStatus(tvNotifStatus, isNotificationOn());
+        setStatus(tvBatteryStatus, isBatteryWhitelisted());
+    }
+
+    private void setStatus(TextView tv, boolean on) {
+        tv.setText(on ? R.string.status_on : R.string.status_off);
+        tv.setBackgroundResource(on ? R.drawable.bg_chip_ok : R.drawable.bg_chip_bad);
+        tv.setTextColor(getColor(on ? R.color.ok_text : R.color.bad_text));
+    }
+
+    private boolean isAccessibilityOn() {
+        try {
+            int enabled = Settings.Secure.getInt(
+                    getContentResolver(), Settings.Secure.ACCESSIBILITY_ENABLED, 0);
+            if (enabled != 1) {
+                return false;
+            }
+            String services = Settings.Secure.getString(
+                    getContentResolver(), Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
+            String expect = getPackageName() + "/" + MyAccessibilityService.class.getName();
+            return services != null && services.toLowerCase().contains(expect.toLowerCase());
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    private boolean isNotificationOn() {
+        NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        if (nm == null || !nm.areNotificationsEnabled()) {
+            return false;
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            return checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS)
+                    == PackageManager.PERMISSION_GRANTED;
+        }
+        return true;
+    }
+
+    private boolean isBatteryWhitelisted() {
+        PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
+        return pm != null && pm.isIgnoringBatteryOptimizations(getPackageName());
+    }
+
+    /** 打开 Vivo 自启动管理页（失败则给出提示） */
+    private void openVivoAutostart() {
+        try {
+            Intent i = new Intent();
+            i.setComponent(new ComponentName(
+                    "com.vivo.permissionmanager",
+                    "com.vivo.permissionmanager.activity.BgStartUpManagerActivity"));
+            startActivity(i);
+            return;
+        } catch (Exception ignored) {
+        }
+        try {
+            Intent i = new Intent();
+            i.setComponent(new ComponentName(
+                    "com.vivo.permissionmanager",
+                    "com.vivo.permissionmanager.activity.PurviewTabActivity"));
+            startActivity(i);
+            return;
+        } catch (Exception ignored) {
+        }
+        toast("请在系统设置中搜索「自启动」，允许 4ma 自启动");
+    }
+
+    private void requestNotificationPermissionIfNeeded() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
+                && checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS)
+                != PackageManager.PERMISSION_GRANTED) {
+            requestPermissions(
+                    new String[]{Manifest.permission.POST_NOTIFICATIONS},
+                    REQ_NOTIFICATION_PERMISSION);
+        }
+    }
+
+    private void toast(String msg) {
+        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
+    }
+}

app/src/main/java/com/example/accessibilityhelper/MyAccessibilityService.java

@@ -0,0 +1,426 @@
+package com.example.accessibilityhelper;
+
+import android.accessibilityservice.AccessibilityService;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.hardware.HardwareBuffer;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.PowerManager;
+import android.util.Log;
+import android.view.Display;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityNodeInfo;
+import android.view.accessibility.AccessibilityWindowInfo;
+import android.widget.Toast;
+
+import com.google.mlkit.vision.common.InputImage;
+import com.google.mlkit.vision.text.TextRecognition;
+import com.google.mlkit.vision.text.TextRecognizer;
+import com.google.mlkit.vision.text.chinese.ChineseTextRecognizerOptions;
+
+/**
+ * 无障碍辅助服务。
+ *
+ * 监听微信（com.tencent.mm）中「7MA出行」小程序的界面文字：
+ *  - 匹配到「我要还车 / 预计费用 / 助力车编号」时开始用车计时；
+ *  - 匹配到「还车成功」时自动结束计时。
+ */
+public class MyAccessibilityService extends AccessibilityService {
+
+    private static final String TAG = "A11yHelper";
+
+    /** 微信包名 */
+    private static final String WECHAT_PKG = "com.tencent.mm";
+
+    private static final String KEY_RETURNING = "我要还车";
+    private static final String KEY_ESTIMATE = "预计费用";
+    private static final String KEY_VEHICLE_NO = "助力车编号";
+    private static final String KEY_SUCCESS = "还车成功";
+
+    /** 两次无障碍扫描之间的最小间隔 */
+    private static final long SCAN_THROTTLE_MS = 300L;
+    /** 节点树遍历最大深度 */
+    private static final int MAX_DEPTH = 14;
+
+    /** 骑行中 OCR 最小间隔：追着界面变化抓「还车成功」弹窗 */
+    private static final long OCR_GAP_RIDING_MS = 600L;
+    /** 未骑行时 OCR 最小间隔：仅在界面变化事件期间运行 */
+    private static final long OCR_GAP_IDLE_MS = 1000L;
+    /** 窗口状态切换（如弹窗出现）后补拍一帧的延迟 */
+    private static final long FOLLOWUP_DELAY_MS = 800L;
+
+    private long lastScanTime = 0L;
+    private long lastOcrTime = 0L;
+    private boolean ocrInProgress = false;
+    private boolean pendingOcr = false;
+    private boolean followupScheduled = false;
+    private TextRecognizer recognizer;
+    private final Handler handler = new Handler(Looper.getMainLooper());
+    private final java.util.concurrent.Executor mainExecutor = command -> handler.post(command);
+
+    @Override
+    public void onServiceConnected() {
+        super.onServiceConnected();
+        RideSessionManager.getInstance().attach(this);
+        if (recognizer != null) {
+            recognizer.close();
+        }
+        recognizer = TextRecognition.getClient(new ChineseTextRecognizerOptions.Builder().build());
+        Toast.makeText(this, "无障碍服务已连接", Toast.LENGTH_SHORT).show();
+        Log.i(TAG, "onServiceConnected: 服务已连接");
+    }
+
+    @Override
+    public void onDestroy() {
+        handler.removeCallbacksAndMessages(null);
+        if (recognizer != null) {
+            recognizer.close();
+            recognizer = null;
+        }
+        RideSessionManager.getInstance().detach(this);
+        super.onDestroy();
+    }
+
+    /** 返回 true：配置变化或系统重启后自动重新绑定，配合后台常驻守护 */
+    @Override
+    public boolean onUnbind(Intent intent) {
+        Log.i(TAG, "onUnbind: 保持可重新绑定");
+        return true;
+    }
+
+    @Override
+    public void onRebind(Intent intent) {
+        Log.i(TAG, "onRebind: 服务已重新绑定");
+    }
+
+    @Override
+    public void onAccessibilityEvent(AccessibilityEvent event) {
+        if (event == null || event.getPackageName() == null) {
+            return;
+        }
+        String pkg = event.getPackageName().toString();
+        int type = event.getEventType();
+        // 诊断：无条件记录所有收到的无障碍事件，确认系统是否派发
+        Log.i(TAG, "evt: pkg=" + pkg + " type=" + type);
+        if (!WECHAT_PKG.equals(pkg)) {
+            return;
+        }
+        if (type != AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED
+                && type != AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED) {
+            return;
+        }
+        long now = System.currentTimeMillis();
+        if (now - lastScanTime < SCAN_THROTTLE_MS) {
+            return;
+        }
+        lastScanTime = now;
+        scanWindow(event);
+    }
+
+    /**
+     * 遍历当前激活窗口的节点树，收集文字，识别是否处于用车画面。
+     */
+    private void scanWindow(AccessibilityEvent event) {
+        StringBuilder sb = new StringBuilder();
+        String rootDesc = "";
+
+        // 1) 优先从事件源节点读取（最贴近本次内容变化，尤其小程序 WebView 内容）
+        AccessibilityNodeInfo src = event != null ? event.getSource() : null;
+        if (src != null) {
+            src.refresh();
+            collectText(src, sb, 0);
+            rootDesc = "eventSource=" + src.getPackageName() + "/" + src.getClassName()
+                    + " children=" + src.getChildCount();
+            src.recycle();
+        } else {
+            rootDesc = "eventSource=null";
+        }
+
+        // 2) 事件源读不到，回退到激活窗口根
+        if (sb.length() == 0) {
+            AccessibilityNodeInfo root = getRootInActiveWindow();
+            if (root != null) {
+                root.refresh();
+                collectText(root, sb, 0);
+                rootDesc += " root=" + root.getPackageName() + "/" + root.getClassName()
+                        + " children=" + root.getChildCount();
+                root.recycle();
+            } else {
+                rootDesc += " root=null";
+            }
+        }
+
+        // 3) 仍读不到，遍历所有窗口，但只读目标包（微信）窗口，跳过状态栏/系统栏
+        if (sb.length() == 0) {
+            boolean found = false;
+            for (AccessibilityWindowInfo w : getWindows()) {
+                if (w == null) {
+                    continue;
+                }
+                AccessibilityNodeInfo r = w.getRoot();
+                if (r == null || r.getPackageName() == null) {
+                    continue;
+                }
+                String wpkg = r.getPackageName().toString();
+                if (!WECHAT_PKG.equals(wpkg)) {
+                    continue;
+                }
+                int beforeLen = sb.length();
+                r.refresh();
+                collectText(r, sb, 0);
+                rootDesc += " getWindows(pkg=" + wpkg + " children=" + r.getChildCount() + ")";
+                r.recycle();
+                if (sb.length() > beforeLen) {
+                    found = true;
+                    break;
+                }
+            }
+            if (!found) {
+                rootDesc += " getWindows:(no wechat content)";
+            }
+        }
+
+        String text = sb.toString();
+
+        String preview = text.length() > 200 ? text.substring(0, 200) : text;
+        Log.i(TAG, "scan: " + rootDesc
+                + " len=" + text.length()
+                + " 还车成功=" + text.contains(KEY_SUCCESS)
+                + " 我要还车=" + text.contains(KEY_RETURNING)
+                + " 预计费用=" + text.contains(KEY_ESTIMATE)
+                + " 助力车编号=" + text.contains(KEY_VEHICLE_NO)
+                + " text=[" + preview + "]");
+
+        // 诊断：读不到内容时，dump 事件源与激活窗口的节点树
+        if (text.length() == 0) {
+            AccessibilityNodeInfo dbgSrc = event != null ? event.getSource() : null;
+            if (dbgSrc != null) {
+                Log.i(TAG, "TREE(eventSource): " + dumpNodeTree(dbgSrc, 0));
+                dbgSrc.recycle();
+            }
+            AccessibilityNodeInfo root = getRootInActiveWindow();
+            if (root != null) {
+                Log.i(TAG, "TREE(root): " + dumpNodeTree(root, 0));
+                root.recycle();
+            }
+        }
+
+        boolean hasSuccess = text.contains(KEY_SUCCESS);
+        boolean hasStart = text.contains(KEY_RETURNING)
+                || text.contains(KEY_ESTIMATE)
+                || text.contains(KEY_VEHICLE_NO);
+        if (hasSuccess) {
+            Log.i(TAG, "hit: 还车成功 -> end");
+            RideSessionManager.getInstance().end();
+        } else if (hasStart) {
+            Log.i(TAG, "hit: 用车界面 -> start");
+            RideSessionManager.getInstance().start();
+        } else if (text.isEmpty() || RideSessionManager.getInstance().isRiding()) {
+            // 无障碍读不到内容（WebView 未暴露）或骑行中需盯「还车成功」：
+            // 仅在微信界面产生变化事件时做截图+OCR，界面静止即停止，不在后台持续识别
+            boolean stateChanged = event != null
+                    && event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED;
+            scheduleOcr(stateChanged);
+        }
+    }
+
+    /** 节点树 dump（类名/文字），用于诊断小程序内容是否可读 */
+    private String dumpNodeTree(AccessibilityNodeInfo node, int depth) {
+        if (node == null || depth > 8) {
+            return "";
+        }
+        StringBuilder sb = new StringBuilder();
+        CharSequence t = node.getText();
+        CharSequence d = node.getContentDescription();
+        sb.append("\n").append("  ".repeat(Math.min(depth, 6)))
+                .append(node.getClassName()).append(" id=").append(node.getViewIdResourceName());
+        if (t != null) {
+            sb.append(" text=").append(t);
+        }
+        if (d != null) {
+            sb.append(" desc=").append(d);
+        }
+        for (int i = 0; i < node.getChildCount(); i++) {
+            sb.append(dumpNodeTree(node.getChild(i), depth + 1));
+        }
+        return sb.toString();
+    }
+
+    private void collectText(AccessibilityNodeInfo node, StringBuilder sb, int depth) {
+        if (node == null || depth > MAX_DEPTH) {
+            return;
+        }
+        CharSequence text = node.getText();
+        if (text != null && text.length() > 0) {
+            sb.append(text).append(' ');
+        }
+        CharSequence desc = node.getContentDescription();
+        if (desc != null && desc.length() > 0) {
+            sb.append(desc).append(' ');
+        }
+        for (int i = 0; i < node.getChildCount(); i++) {
+            collectText(node.getChild(i), sb, depth + 1);
+        }
+    }
+
+    /**
+     * OCR 兜底（事件驱动）：只在微信界面产生变化事件时运行，
+     * 界面静止时完全停止。骑行中节奏提到 ~600ms/帧，捕捉一闪而过的「还车成功」。
+     */
+    private void scheduleOcr(boolean stateChanged) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
+            return;
+        }
+        if (recognizer == null) {
+            return;
+        }
+        PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
+        if (pm != null && !pm.isInteractive()) {
+            return; // 息屏不识别，省电
+        }
+        long now = System.currentTimeMillis();
+        long minGap = RideSessionManager.getInstance().isRiding()
+                ? OCR_GAP_RIDING_MS : OCR_GAP_IDLE_MS;
+        if (ocrInProgress || now - lastOcrTime < minGap) {
+            pendingOcr = true; // 等当前识别完成后立刻补一帧
+            if (stateChanged) {
+                scheduleFollowup();
+            }
+            return;
+        }
+        lastOcrTime = now;
+        doOcr();
+        if (stateChanged) {
+            scheduleFollowup();
+        }
+    }
+
+    /** 窗口状态切换（弹窗/页面切换）后延迟补拍一帧，捕捉短暂提示 */
+    private void scheduleFollowup() {
+        if (followupScheduled) {
+            return;
+        }
+        followupScheduled = true;
+        handler.postDelayed(() -> {
+            followupScheduled = false;
+            long now = System.currentTimeMillis();
+            long minGap = RideSessionManager.getInstance().isRiding()
+                    ? OCR_GAP_RIDING_MS : OCR_GAP_IDLE_MS;
+            if (ocrInProgress || now - lastOcrTime < minGap) {
+                pendingOcr = true;
+                return;
+            }
+            lastOcrTime = now;
+            doOcr();
+        }, FOLLOWUP_DELAY_MS);
+    }
+
+    private void doOcr() {
+        ocrInProgress = true;
+        try {
+            takeScreenshot(Display.DEFAULT_DISPLAY, mainExecutor, new TakeScreenshotCallback() {
+                @Override
+                public void onSuccess(ScreenshotResult result) {
+                    HardwareBuffer buffer = result.getHardwareBuffer();
+                    Bitmap toProcess = null;
+                    try {
+                        Bitmap raw = Bitmap.wrapHardwareBuffer(buffer, result.getColorSpace());
+                        if (raw != null) {
+                            toProcess = raw.copy(Bitmap.Config.ARGB_8888, false);
+                        }
+                    } catch (Throwable t) {
+                        Log.i(TAG, "wrapHardwareBuffer failed: " + t);
+                    } finally {
+                        buffer.close();
+                    }
+                    if (toProcess == null) {
+                        ocrInProgress = false;
+                        return;
+                    }
+                    final Bitmap scaled = scaleDown(toProcess);
+                    if (scaled != toProcess) {
+                        toProcess.recycle();
+                    }
+                    try {
+                        InputImage image = InputImage.fromBitmap(scaled, 0);
+                        recognizer.process(image)
+                                .addOnSuccessListener(text -> {
+                                    String s = text.getText();
+                                    String preview = s.length() > 120 ? s.substring(0, 120) : s;
+                                    Log.i(TAG, "ocr: len=" + s.length() + " text=[" + preview + "]");
+                                    evaluateText(s);
+                                })
+                                .addOnFailureListener(e -> Log.i(TAG, "ocr failed: " + e))
+                                .addOnCompleteListener(task -> {
+                                    scaled.recycle();
+                                    ocrInProgress = false;
+                                    drainPendingOcr();
+                                });
+                    } catch (Throwable t) {
+                        Log.i(TAG, "ocr exception: " + t);
+                        scaled.recycle();
+                        ocrInProgress = false;
+                        drainPendingOcr();
+                    }
+                }
+
+                @Override
+                public void onFailure(int errorCode) {
+                    Log.i(TAG, "takeScreenshot failed, code=" + errorCode);
+                    ocrInProgress = false;
+                    drainPendingOcr();
+                }
+            });
+        } catch (Throwable t) {
+            Log.i(TAG, "takeScreenshot exception: " + t);
+            ocrInProgress = false;
+        }
+    }
+
+    /** 有事件积压时补跑一帧，直到界面安静下来 */
+    private void drainPendingOcr() {
+        if (!pendingOcr) {
+            return;
+        }
+        pendingOcr = false;
+        long now = System.currentTimeMillis();
+        long minGap = RideSessionManager.getInstance().isRiding()
+                ? OCR_GAP_RIDING_MS : OCR_GAP_IDLE_MS;
+        if (now - lastOcrTime >= minGap) {
+            lastOcrTime = now;
+            doOcr();
+        }
+    }
+
+    private void evaluateText(String text) {
+        if (text == null || text.isEmpty()) {
+            return;
+        }
+        if (text.contains(KEY_SUCCESS)) {
+            RideSessionManager.getInstance().end();
+        } else if (text.contains(KEY_RETURNING)
+                || text.contains(KEY_ESTIMATE)
+                || text.contains(KEY_VEHICLE_NO)) {
+            RideSessionManager.getInstance().start();
+        }
+    }
+
+    /** 缩小截图，降低 OCR 耗时与内存 */
+    private static Bitmap scaleDown(Bitmap src) {
+        final int maxW = 1080;
+        if (src.getWidth() <= maxW) {
+            return src;
+        }
+        float scale = (float) maxW / src.getWidth();
+        int w = Math.max(1, Math.round(src.getWidth() * scale));
+        int h = Math.max(1, Math.round(src.getHeight() * scale));
+        return Bitmap.createScaledBitmap(src, w, h, true);
+    }
+
+    @Override
+    public void onInterrupt() {
+        Log.i(TAG, "onInterrupt");
+    }
+}

app/src/main/java/com/example/accessibilityhelper/RideSessionManager.java

@@ -0,0 +1,234 @@
+package com.example.accessibilityhelper;
+
+import android.accessibilityservice.AccessibilityService;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.SystemClock;
+import android.widget.Toast;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+/**
+ * 用车计时会话管理器（单例）。
+ *
+ * 职责：
+ *  - 在匹配到「我要还车/预计费用/助力车编号」时开始计时；
+ *  - 构建并更新系统通知栏的「用车中」常驻通知（含手动「结束用车」按钮）；
+ *  - 到达 15 / 18 / 30 分钟时，各发送一条普通提醒通知；
+ *  - 在匹配到「还车成功」或用户点击「结束用车」时结束计时，并清除通知。
+ */
+public class RideSessionManager {
+
+    private static final String TAG = "RideSession";
+
+    /** 常驻通知渠道 */
+    public static final String CHANNEL_RIDE = "ride_ongoing";
+    /** 提醒通知渠道 */
+    public static final String CHANNEL_REMIND = "ride_reminder";
+
+    private static final int NOTIF_ID_ONGOING = 1001;
+    private static final int REMIND_BASE_ID = 2000;
+
+    /** 里程碑提醒（分钟） */
+    private static final int[] MILESTONE_MINUTES = {15, 18, 30};
+
+    /** 结束用车动作 */
+    public static final String ACTION_END_RIDE = "com.example.accessibilityhelper.ACTION_END_RIDE";
+
+    private static RideSessionManager instance;
+
+    private AccessibilityService service;
+    private NotificationManager nm;
+    private Handler handler;
+
+    private boolean riding = false;
+    private long startWallTime = 0L;
+    private long startElapsedRealtime = 0L;
+    private final boolean[] fired = new boolean[MILESTONE_MINUTES.length];
+
+    private RideSessionManager() {
+    }
+
+    public static synchronized RideSessionManager getInstance() {
+        if (instance == null) {
+            instance = new RideSessionManager();
+        }
+        return instance;
+    }
+
+    /** 由无障碍服务在 onServiceConnected 时调用 */
+    public void attach(AccessibilityService s) {
+        this.service = s;
+        this.nm = (NotificationManager) s.getSystemService(Context.NOTIFICATION_SERVICE);
+        this.handler = new Handler(Looper.getMainLooper());
+        createChannels();
+        // 清除上一进程残留的通知（进程被杀后常驻通知不会自动消失）
+        nm.cancel(NOTIF_ID_ONGOING);
+        for (int m : MILESTONE_MINUTES) {
+            nm.cancel(REMIND_BASE_ID + m);
+        }
+    }
+
+    /** 由无障碍服务在 onDestroy 时调用：停止计时并清除通知，避免残留常驻通知 */
+    public void detach(AccessibilityService s) {
+        if (service == s) {
+            riding = false;
+            if (handler != null) {
+                handler.removeCallbacksAndMessages(null);
+            }
+            if (nm != null) {
+                nm.cancel(NOTIF_ID_ONGOING);
+                for (int m : MILESTONE_MINUTES) {
+                    nm.cancel(REMIND_BASE_ID + m);
+                }
+            }
+            service = null;
+        }
+    }
+
+    private void createChannels() {
+        if (nm == null) {
+            return;
+        }
+        NotificationChannel ride = new NotificationChannel(
+                CHANNEL_RIDE, "用车状态", NotificationManager.IMPORTANCE_LOW);
+        ride.setDescription("用车中的常驻通知");
+        ride.setSound(null, null);
+        nm.createNotificationChannel(ride);
+
+        NotificationChannel remind = new NotificationChannel(
+                CHANNEL_REMIND, "用车提醒", NotificationManager.IMPORTANCE_HIGH);
+        remind.setDescription("用车计时到点提醒");
+        nm.createNotificationChannel(remind);
+    }
+
+    public synchronized boolean isRiding() {
+        return riding;
+    }
+
+    /** 开始计时 */
+    public synchronized void start() {
+        if (riding || service == null) {
+            return;
+        }
+        riding = true;
+        startWallTime = System.currentTimeMillis();
+        startElapsedRealtime = SystemClock.elapsedRealtime();
+        for (int i = 0; i < fired.length; i++) {
+            fired[i] = false;
+        }
+        postOngoing();
+        scheduleTick();
+        toast("开始用车计时");
+    }
+
+    /** 结束计时 */
+    public synchronized void end() {
+        if (!riding) {
+            return;
+        }
+        riding = false;
+        if (handler != null) {
+            handler.removeCallbacksAndMessages(null);
+        }
+        if (nm != null) {
+            nm.cancel(NOTIF_ID_ONGOING);
+            for (int m : MILESTONE_MINUTES) {
+                nm.cancel(REMIND_BASE_ID + m);
+            }
+        }
+        toast("已结束用车，并清除通知");
+    }
+
+    private void scheduleTick() {
+        if (!riding || handler == null) {
+            return;
+        }
+        handler.postDelayed(tick, 1000L);
+    }
+
+    private final Runnable tick = new Runnable() {
+        @Override
+        public void run() {
+            if (!riding) {
+                return;
+            }
+            long elapsedMs = SystemClock.elapsedRealtime() - startElapsedRealtime;
+            long seconds = elapsedMs / 1000L;
+            checkMilestones(seconds);
+            scheduleTick();
+        }
+    };
+
+    private void checkMilestones(long seconds) {
+        if (nm == null) {
+            return;
+        }
+        for (int i = 0; i < MILESTONE_MINUTES.length; i++) {
+            if (!fired[i] && seconds >= MILESTONE_MINUTES[i] * 60L) {
+                fired[i] = true;
+                postReminder(MILESTONE_MINUTES[i]);
+            }
+        }
+    }
+
+    /** 构建/更新「用车中」常驻通知 */
+    private void postOngoing() {
+        if (service == null || nm == null) {
+            return;
+        }
+        Notification.Builder b = buildOngoing();
+        nm.notify(NOTIF_ID_ONGOING, b.build());
+    }
+
+    private Notification.Builder buildOngoing() {
+        Intent endIntent = new Intent(service, EndRideReceiver.class);
+        endIntent.setAction(ACTION_END_RIDE);
+        PendingIntent endPi = PendingIntent.getBroadcast(
+                service, 1, endIntent,
+                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
+
+        String startText = "开始于 " + formatWallTime(startWallTime);
+        return new Notification.Builder(service, CHANNEL_RIDE)
+                .setContentTitle("用车中")
+                .setContentText(startText)
+                .setSmallIcon(R.drawable.ic_stat_ride)
+                .setOngoing(true)
+                .setWhen(startWallTime)
+                .setUsesChronometer(true)
+                .setOnlyAlertOnce(true)
+                .setShowWhen(true)
+                .addAction(android.R.drawable.ic_menu_close_clear_cancel, "结束用车", endPi);
+    }
+
+    /** 到达里程碑时的普通提醒通知 */
+    private void postReminder(int minutes) {
+        if (service == null || nm == null) {
+            return;
+        }
+        Notification.Builder b = new Notification.Builder(service, CHANNEL_REMIND)
+                .setContentTitle("用车提醒")
+                .setContentText("已用车 " + minutes + " 分钟，请注意用车时长")
+                .setSmallIcon(R.drawable.ic_stat_ride)
+                .setAutoCancel(true);
+        nm.notify(REMIND_BASE_ID + minutes, b.build());
+    }
+
+    private static String formatWallTime(long timeMillis) {
+        return new SimpleDateFormat("HH:mm", Locale.getDefault()).format(new Date(timeMillis));
+    }
+
+    private void toast(String msg) {
+        if (service != null) {
+            Toast.makeText(service, msg, Toast.LENGTH_SHORT).show();
+        }
+    }
+}

app/src/main/res/drawable/bg_btn_outline.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#00000000" />
+    <corners android:radius="999dp" />
+    <stroke android:width="1dp" android:color="#D1D5DB" />
+</shape>

app/src/main/res/drawable/bg_card.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/card" />
+    <corners android:radius="14dp" />
+    <stroke android:width="1dp" android:color="@color/border" />
+</shape>

app/src/main/res/drawable/bg_chip_bad.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/bad_bg" />
+    <corners android:radius="999dp" />
+</shape>

app/src/main/res/drawable/bg_chip_ok.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/ok_bg" />
+    <corners android:radius="999dp" />
+</shape>

app/src/main/res/drawable/ic_stat_ride.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 通知栏小图标：白色时钟（纯 alpha 图形） -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:pathData="M12,12 m-8.5,0 a8.5,8.5 0 1,1 17,0 a8.5,8.5 0 1,1 -17,0"
+        android:strokeColor="#FFFFFFFF"
+        android:strokeWidth="1.8"
+        android:fillColor="#00000000" />
+    <path
+        android:pathData="M12,12 L12,6.2"
+        android:strokeColor="#FFFFFFFF"
+        android:strokeWidth="1.8"
+        android:strokeLineCap="round" />
+    <path
+        android:pathData="M12,12 L15.4,13.9"
+        android:strokeColor="#FFFFFFFF"
+        android:strokeWidth="1.8"
+        android:strokeLineCap="round" />
+</vector>

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

@@ -0,0 +1,395 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/bg"
+    android:fillViewport="true"
+    android:scrollbars="none">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingStart="20dp"
+        android:paddingEnd="20dp"
+        android:paddingTop="30dp"
+        android:paddingBottom="40dp">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/header_title"
+            android:textColor="@color/text_main"
+            android:textSize="32sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:text="@string/header_desc"
+            android:textColor="@color/text_sub"
+            android:textSize="15sp" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="6dp"
+            android:text="@string/header_sub"
+            android:textColor="@color/text_faint"
+            android:textSize="12sp" />
+
+        <!-- 权限与后台守护 -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="26dp"
+            android:text="@string/sec_permissions"
+            android:textColor="@color/text_sub"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:background="@drawable/bg_card"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:id="@+id/row_a11y"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackground"
+                android:gravity="center_vertical"
+                android:orientation="horizontal"
+                android:padding="14dp">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/row_a11y"
+                        android:textColor="@color/text_main"
+                        android:textSize="15sp"
+                        android:textStyle="bold" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="2dp"
+                        android:text="@string/row_a11y_desc"
+                        android:textColor="@color/text_sub"
+                        android:textSize="12sp" />
+                </LinearLayout>
+
+                <TextView
+                    android:id="@+id/status_a11y"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:background="@drawable/bg_chip_bad"
+                    android:paddingStart="10dp"
+                    android:paddingEnd="10dp"
+                    android:paddingTop="4dp"
+                    android:paddingBottom="4dp"
+                    android:text="@string/status_off"
+                    android:textColor="@color/bad_text"
+                    android:textSize="12sp"
+                    android:textStyle="bold" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginStart="14dp"
+                android:layout_marginEnd="14dp"
+                android:background="@color/border" />
+
+            <LinearLayout
+                android:id="@+id/row_notif"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackground"
+                android:gravity="center_vertical"
+                android:orientation="horizontal"
+                android:padding="14dp">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/row_notif"
+                        android:textColor="@color/text_main"
+                        android:textSize="15sp"
+                        android:textStyle="bold" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="2dp"
+                        android:text="@string/row_notif_desc"
+                        android:textColor="@color/text_sub"
+                        android:textSize="12sp" />
+                </LinearLayout>
+
+                <TextView
+                    android:id="@+id/status_notif"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:background="@drawable/bg_chip_bad"
+                    android:paddingStart="10dp"
+                    android:paddingEnd="10dp"
+                    android:paddingTop="4dp"
+                    android:paddingBottom="4dp"
+                    android:text="@string/status_off"
+                    android:textColor="@color/bad_text"
+                    android:textSize="12sp"
+                    android:textStyle="bold" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginStart="14dp"
+                android:layout_marginEnd="14dp"
+                android:background="@color/border" />
+
+            <LinearLayout
+                android:id="@+id/row_battery"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackground"
+                android:gravity="center_vertical"
+                android:orientation="horizontal"
+                android:padding="14dp">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/row_battery"
+                        android:textColor="@color/text_main"
+                        android:textSize="15sp"
+                        android:textStyle="bold" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="2dp"
+                        android:text="@string/row_battery_desc"
+                        android:textColor="@color/text_sub"
+                        android:textSize="12sp" />
+                </LinearLayout>
+
+                <TextView
+                    android:id="@+id/status_battery"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:background="@drawable/bg_chip_bad"
+                    android:paddingStart="10dp"
+                    android:paddingEnd="10dp"
+                    android:paddingTop="4dp"
+                    android:paddingBottom="4dp"
+                    android:text="@string/status_off"
+                    android:textColor="@color/bad_text"
+                    android:textSize="12sp"
+                    android:textStyle="bold" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginStart="14dp"
+                android:layout_marginEnd="14dp"
+                android:background="@color/border" />
+
+            <LinearLayout
+                android:id="@+id/row_autostart"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackground"
+                android:gravity="center_vertical"
+                android:orientation="horizontal"
+                android:padding="14dp">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/row_autostart"
+                        android:textColor="@color/text_main"
+                        android:textSize="15sp"
+                        android:textStyle="bold" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="2dp"
+                        android:text="@string/row_autostart_desc"
+                        android:textColor="@color/text_sub"
+                        android:textSize="12sp" />
+                </LinearLayout>
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:background="@drawable/bg_btn_outline"
+                    android:paddingStart="12dp"
+                    android:paddingEnd="12dp"
+                    android:paddingTop="5dp"
+                    android:paddingBottom="5dp"
+                    android:text="@string/status_goto"
+                    android:textColor="@color/text_main"
+                    android:textSize="12sp"
+                    android:textStyle="bold" />
+            </LinearLayout>
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="#F5F8FA"
+                android:padding="14dp"
+                android:text="@string/tip_daemon"
+                android:textColor="@color/text_faint"
+                android:textSize="12sp"
+                android:lineSpacingExtra="3dp" />
+        </LinearLayout>
+
+        <!-- 具体实现 -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="22dp"
+            android:text="@string/sec_impl_title"
+            android:textColor="@color/text_sub"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:background="@drawable/bg_card"
+            android:orientation="vertical"
+            android:padding="14dp">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:lineSpacingExtra="4dp"
+                android:text="@string/sec_impl_body"
+                android:textColor="@color/text_sub"
+                android:textSize="13sp" />
+        </LinearLayout>
+
+        <!-- 安全性声明 -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="22dp"
+            android:text="@string/sec_security_title"
+            android:textColor="@color/text_sub"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:background="@drawable/bg_card"
+            android:orientation="vertical"
+            android:padding="14dp">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:lineSpacingExtra="4dp"
+                android:text="@string/sec_security_body"
+                android:textColor="@color/text_sub"
+                android:textSize="13sp" />
+        </LinearLayout>
+
+        <!-- 免责声明 -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="22dp"
+            android:text="@string/sec_disclaimer_title"
+            android:textColor="@color/text_sub"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:background="@drawable/bg_card"
+            android:orientation="vertical"
+            android:padding="14dp">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:lineSpacingExtra="4dp"
+                android:text="@string/sec_disclaimer_body"
+                android:textColor="@color/text_sub"
+                android:textSize="13sp" />
+        </LinearLayout>
+
+        <!-- 法律声明 -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="22dp"
+            android:text="@string/sec_legal_title"
+            android:textColor="@color/text_sub"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:background="@drawable/bg_card"
+            android:orientation="vertical"
+            android:padding="14dp">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:lineSpacingExtra="4dp"
+                android:text="@string/sec_legal_body"
+                android:textColor="@color/text_sub"
+                android:textSize="13sp" />
+        </LinearLayout>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="28dp"
+            android:gravity="center"
+            android:text="@string/footer_text"
+            android:textColor="@color/text_faint"
+            android:textSize="12sp" />
+    </LinearLayout>
+</ScrollView>

app/src/main/res/values/colors.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- 浅色主题色板 -->
+    <color name="bg">#F7F9FB</color>
+    <color name="card">#FFFFFF</color>
+    <color name="text_main">#1F2937</color>
+    <color name="text_sub">#6B7280</color>
+    <color name="text_faint">#9CA3AF</color>
+    <color name="brand">#10B981</color>
+    <color name="brand_dark">#059669</color>
+    <color name="ok_bg">#D1FAE5</color>
+    <color name="ok_text">#047857</color>
+    <color name="bad_bg">#FEE2E2</color>
+    <color name="bad_text">#B91C1C</color>
+    <color name="border">#E5E9EE</color>
+</resources>

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

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- 应用信息 -->
+    <string name="app_name">4ma</string>
+    <string name="app_desc">7ma还车提醒工具</string>
+
+    <!-- 无障碍服务 -->
+    <string name="accessibility_service_label">4ma</string>
+    <string name="accessibility_service_description">7ma还车提醒工具：监听7MA出行小程序用车界面，自动开始/结束用车计时，并在15/18/30分钟提醒。仅读取界面文字，不执行任何点击或模拟操作。</string>
+
+    <!-- 主界面 -->
+    <string name="header_title">4ma</string>
+    <string name="header_desc">7ma还车提醒工具</string>
+    <string name="header_sub">监听 7MA 出行小程序 · 自动计时 · 到点提醒 · 全程离线</string>
+
+    <string name="sec_permissions">权限与后台守护</string>
+
+    <string name="row_a11y">无障碍服务</string>
+    <string name="row_a11y_desc">读取用车界面文字，自动开始/结束计时</string>
+    <string name="row_notif">通知权限</string>
+    <string name="row_notif_desc">显示计时常驻通知与 15/18/30 分钟提醒</string>
+    <string name="row_battery">电池优化白名单</string>
+    <string name="row_battery_desc">防止系统在后台冻结计时服务</string>
+    <string name="row_autostart">自启动权限</string>
+    <string name="row_autostart_desc">开机或清理后台后自动恢复守护</string>
+
+    <string name="status_on">已开启</string>
+    <string name="status_off">未开启</string>
+    <string name="status_goto">去设置</string>
+
+    <string name="tip_daemon">守护说明：无障碍服务由系统持续绑定，开启后即使重启手机也会自动恢复。建议同时开启电池白名单与自启动，避免国产系统在后台冻结本应用导致计时中断。</string>
+
+    <string name="sec_impl_title">具体实现</string>
+    <string name="sec_impl_body">本应用通过 Android 无障碍服务监听微信（com.tencent.mm）中的「7MA出行」小程序：检测到「我要还车 / 预计费用 / 助力车编号」等界面文字时自动开始用车计时；检测到「还车成功」时自动结束。计时期间通知栏常驻显示用车时长，并在 15 / 18 / 30 分钟各提醒一次；也可以直接点击通知上的「结束用车」按钮手动结束。\n\n当微信小程序的无障碍节点树无法读取内容（WebView 内核限制）时，应用会调用系统无障碍截图接口，并使用内置的离线中文文字识别（ML Kit）匹配上述关键词。全部识别均在手机本地完成，不联网。</string>
+
+    <string name="sec_security_title">安全性声明</string>
+    <string name="sec_security_body">· 本应用不申请网络权限，完全离线运行。\n· 不收集、不存储、不上传任何个人信息与使用数据。\n· 无障碍服务仅用于读取「7MA出行」小程序界面文字并匹配关键词，不模拟点击、不修改或转发任何界面内容。\n· 截图仅在识别瞬间生成，识别完成立即释放内存，不保存任何图片。</string>
+
+    <string name="sec_disclaimer_title">免责声明</string>
+    <string name="sec_disclaimer_body">本工具为非官方第三方辅助工具，与「7MA出行」官方及腾讯微信无任何关联。计时与提醒结果仅供参考，不构成任何费用计算依据，实际用车时长与费用请以 7MA 出行官方账单为准。因手机系统限制、微信或小程序版本更新、无障碍服务被系统终止等原因导致的检测失败或提醒遗漏，开发者不承担由此产生的任何费用、损失或责任。</string>
+
+    <string name="sec_legal_title">法律声明</string>
+    <string name="sec_legal_body">本应用仅限个人学习与出行辅助用途。使用时请遵守中华人民共和国法律法规及 7MA 出行平台的服务协议与相关规则。禁止将本应用用于任何商业用途，或以任何方式侵害 7MA 出行、腾讯及第三方的合法权益。如平台规则变化，请立即停止使用。</string>
+
+    <string name="footer_text">v1.0 · 非 7MA 出行官方应用 · 请合规使用</string>
+</resources>

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

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- 浅色主题 -->
+    <style name="AppTheme" parent="@android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:statusBarColor">@color/bg</item>
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:navigationBarColor">@color/bg</item>
+        <item name="android:windowBackground">@color/bg</item>
+        <item name="android:colorAccent">@color/brand</item>
+    </style>
+</resources>

app/src/main/res/xml/accessibility_service_config.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accessibilityEventTypes="typeWindowContentChanged|typeWindowStateChanged"
+    android:accessibilityFeedbackType="feedbackAllMask"
+    android:accessibilityFlags="flagRetrieveInteractiveWindows|flagReportViewIds|flagIncludeNotImportantViews|flagRequestEnhancedWebAccessibility"
+    android:notificationTimeout="100"
+    android:canPerformGestures="true"
+    android:canRetrieveWindowContent="true"
+    android:canTakeScreenshot="true"
+    android:description="@string/accessibility_service_description" />