在启动Flutter之前，增加一个原生的隐私政策界面

android/app/src/main/AndroidManifest.xml

@@ -21,30 +21,38 @@
 
     <application
         android:label="班小二"
-        android:name="cn.banxe.bxe.MyApplication"
+        android:name="${applicationName}"
         android:icon="@mipmap/launcher_icon"
         android:networkSecurityConfig="@xml/network_security_config">
+
+        <!-- 隐私政策Activity - 启动入口 -->
+        <activity
+            android:name=".PrivacyActivity"
+            android:exported="true"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
-            android:taskAffinity=""
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
-                 while the Flutter UI initializes. After that, this theme continues
+                 while the Android UI initializes. After that, this theme continues
                  to determine the Window background behind the Flutter UI. -->
             <meta-data
               android:name="io.flutter.embedding.android.NormalTheme"
               android:resource="@style/NormalTheme"
               />
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
-            </intent-filter>
         </activity>
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->

android/app/src/main/java/cn/banxe/bxe/PrivacyActivity.java

+package cn.banxe.bxe;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.graphics.Typeface;
+import android.net.Uri;
+import android.os.Bundle;
+import android.text.SpannableString;
+import android.text.Spanned;
+import android.text.TextPaint;
+import android.text.method.LinkMovementMethod;
+import android.text.style.ClickableSpan;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+public class PrivacyActivity extends Activity {
+
+    private static final String PREFS_NAME = "privacy_prefs";
+    private static final String KEY_AGREED = "privacy_agreed";
+
+    private static final String USER_AGREEMENT_URL = "https://bxr.banxiaoer.net/apps/useragreement.html";
+    private static final String PRIVACY_POLICY_URL = "https://bxr.banxiaoer.net/apps/privacysettings.html";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        
+        // 检查是否已同意隐私政策
+        if (isPrivacyAgreed()) {
+            startMainActivity();
+            return;
+        }
+        
+        setContentView(createContentView());
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        setIntent(intent);
+        
+        // 如果已同意隐私政策，将新Intent转发给MainActivity
+        if (isPrivacyAgreed()) {
+            forwardToMainActivity(intent);
+        }
+    }
+
+    private boolean isPrivacyAgreed() {
+        SharedPreferences prefs = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+        return prefs.getBoolean(KEY_AGREED, false);
+    }
+
+    private void savePrivacyAgreed() {
+        SharedPreferences prefs = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+        prefs.edit().putBoolean(KEY_AGREED, true).apply();
+    }
+
+    private View createContentView() {
+        // 根布局
+        LinearLayout rootLayout = new LinearLayout(this);
+        rootLayout.setOrientation(LinearLayout.VERTICAL);
+        rootLayout.setGravity(Gravity.CENTER_VERTICAL);
+        rootLayout.setPadding(dpToPx(32), dpToPx(48), dpToPx(32), dpToPx(48));
+        rootLayout.setBackgroundColor(0xFFFFFFFF);
+
+        // 内容容器
+        LinearLayout contentLayout = new LinearLayout(this);
+        contentLayout.setOrientation(LinearLayout.VERTICAL);
+        LinearLayout.LayoutParams contentLayoutParams = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT);
+        rootLayout.addView(contentLayout, contentLayoutParams);
+
+        // 标题
+        TextView titleView = new TextView(this);
+        titleView.setText("用户协议与隐私政策");
+        titleView.setTextSize(22);
+        titleView.setTextColor(0xFF333333);
+        titleView.setTypeface(null, Typeface.BOLD);
+        titleView.setGravity(Gravity.CENTER);
+        titleView.setPadding(0, 0, 0, dpToPx(32));
+        contentLayout.addView(titleView);
+
+        // 内容（带可点击链接）
+        TextView contentView = new TextView(this);
+        contentView.setText(createClickableContent());
+        contentView.setMovementMethod(LinkMovementMethod.getInstance());
+        contentView.setHighlightColor(0x00000000);
+        contentView.setTextSize(17);
+        contentView.setTextColor(0xFF666666);
+        contentView.setLineSpacing(dpToPx(6), 1.0f);
+        contentView.setGravity(Gravity.START);
+        contentLayout.addView(contentView);
+
+        // 按钮容器
+        LinearLayout buttonLayout = new LinearLayout(this);
+        buttonLayout.setOrientation(LinearLayout.HORIZONTAL);
+        buttonLayout.setGravity(Gravity.CENTER);
+        LinearLayout.LayoutParams buttonLayoutParams = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT);
+        buttonLayoutParams.topMargin = dpToPx(48);
+        contentLayout.addView(buttonLayout, buttonLayoutParams);
+
+        // 同意按钮
+        Button agreeButton = new Button(this);
+        agreeButton.setText("同意");
+        agreeButton.setTextColor(0xFFFFFFFF);
+        agreeButton.setBackgroundColor(0xFF4CAF50);
+        agreeButton.setTextSize(16);
+        agreeButton.setGravity(Gravity.CENTER);
+        agreeButton.setSingleLine(true);
+        agreeButton.setMinWidth(dpToPx(120));
+        agreeButton.setMinHeight(dpToPx(48));
+        int btnPaddingH = dpToPx(24);
+        int btnPaddingV = dpToPx(12);
+        agreeButton.setPadding(btnPaddingH, btnPaddingV, btnPaddingH, btnPaddingV);
+        agreeButton.setOnClickListener(v -> onAgreeClicked());
+        LinearLayout.LayoutParams agreeParams = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.WRAP_CONTENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT);
+        agreeParams.setMargins(dpToPx(16), 0, dpToPx(16), 0);
+        buttonLayout.addView(agreeButton, agreeParams);
+
+        // 不同意按钮
+        Button disagreeButton = new Button(this);
+        disagreeButton.setText("不同意");
+        disagreeButton.setTextColor(0xFF666666);
+        disagreeButton.setBackgroundColor(0xFFEEEEEE);
+        disagreeButton.setTextSize(16);
+        disagreeButton.setGravity(Gravity.CENTER);
+        disagreeButton.setSingleLine(true);
+        disagreeButton.setMinWidth(dpToPx(120));
+        disagreeButton.setMinHeight(dpToPx(48));
+        disagreeButton.setPadding(btnPaddingH, btnPaddingV, btnPaddingH, btnPaddingV);
+        disagreeButton.setOnClickListener(v -> onDisagreeClicked());
+        LinearLayout.LayoutParams disagreeParams = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.WRAP_CONTENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT);
+        disagreeParams.setMargins(dpToPx(16), 0, dpToPx(16), 0);
+        buttonLayout.addView(disagreeButton, disagreeParams);
+
+        return rootLayout;
+    }
+
+    private int dpToPx(int dp) {
+        float density = getResources().getDisplayMetrics().density;
+        return (int) (dp * density + 0.5f);
+    }
+
+    private SpannableString createClickableContent() {
+        String text = "请您仔细阅读《用户协议》和《隐私政策》，\n充分理解协议内容。\n\n" +
+                "我们将严格遵守相关法律法规，保护您的个人信息安全。\n\n" +
+                "点击\"同意\"即表示您已阅读并同意相关协议。";
+        
+        SpannableString spannableString = new SpannableString(text);
+        
+        // 用户协议点击
+        int userAgreementStart = text.indexOf("《用户协议》");
+        int userAgreementEnd = userAgreementStart + "《用户协议》".length();
+        spannableString.setSpan(new ClickableSpan() {
+            @Override
+            public void onClick(View widget) {
+                openBrowser(USER_AGREEMENT_URL);
+            }
+            @Override
+            public void updateDrawState(TextPaint ds) {
+                super.updateDrawState(ds);
+                ds.setColor(0xFF4CAF50);
+                ds.setUnderlineText(true);
+            }
+        }, userAgreementStart, userAgreementEnd, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        
+        // 隐私政策点击
+        int privacyPolicyStart = text.indexOf("《隐私政策》");
+        int privacyPolicyEnd = privacyPolicyStart + "《隐私政策》".length();
+        spannableString.setSpan(new ClickableSpan() {
+            @Override
+            public void onClick(View widget) {
+                openBrowser(PRIVACY_POLICY_URL);
+            }
+            @Override
+            public void updateDrawState(TextPaint ds) {
+                super.updateDrawState(ds);
+                ds.setColor(0xFF4CAF50);
+                ds.setUnderlineText(true);
+            }
+        }, privacyPolicyStart, privacyPolicyEnd, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        
+        return spannableString;
+    }
+
+    private void openBrowser(String url) {
+        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+        startActivity(intent);
+    }
+
+    private void onAgreeClicked() {
+        savePrivacyAgreed();
+        startMainActivity();
+    }
+
+    private void onDisagreeClicked() {
+        new AlertDialog.Builder(this)
+                .setTitle("提示")
+                .setMessage("您需要同意隐私政策才能使用本应用，是否重新考虑？")
+                .setPositiveButton("重新考虑", (dialog, which) -> {
+                    // 不做任何操作，保持当前界面
+                })
+                .setNegativeButton("仍不同意", (dialog, which) -> {
+                    // 退出应用
+                    finishAffinity();
+                })
+                .setCancelable(false)
+                .show();
+    }
+
+    private void startMainActivity() {
+        Intent intent = new Intent(this, MainActivity.class);
+        copyIntentData(getIntent(), intent);
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
+        startActivity(intent);
+        finish();
+    }
+
+    private void forwardToMainActivity(Intent sourceIntent) {
+        Intent intent = new Intent(this, MainActivity.class);
+        copyIntentData(sourceIntent, intent);
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
+        startActivity(intent);
+        finish();
+    }
+
+    private void copyIntentData(Intent source, Intent dest) {
+        if (source == null) return;
+        
+        // 复制Extras
+        if (source.getExtras() != null) {
+            dest.putExtras(source.getExtras());
+        }
+        
+        // 复制Data URI（微信回调可能使用）
+        if (source.getData() != null) {
+            dest.setData(source.getData());
+        }
+        
+        // 复制Action
+        if (source.getAction() != null) {
+            dest.setAction(source.getAction());
+        }
+        
+        // 复制所有分类
+        if (source.getCategories() != null) {
+            for (String category : source.getCategories()) {
+                dest.addCategory(category);
+            }
+        }
+        
+        // 复制Flags（排除某些会导致问题的flags）
+        int flags = source.getFlags();
+        flags &= ~Intent.FLAG_ACTIVITY_NEW_TASK;
+        flags &= ~Intent.FLAG_ACTIVITY_CLEAR_TASK;
+        dest.setFlags(flags);
+    }
+
+    @Override
+    public void onBackPressed() {
+        // 禁止返回键
+    }
+}