feat: 构建flutter 基座

android/app/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- 网络权限 -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    
+    <!-- 存储权限 -->
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
+    
+    <!-- Image Cropper 权限 -->
+    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
+    <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
+    
+    <!-- 相机和麦克风权限 -->
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+    
+    <!-- 通知权限 -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    
+    <!-- 系统窗口权限 -->
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
+    
+    <!-- 设备信息权限 -->
+    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
+    
+    <!-- 位置权限（如果需要） -->
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+    
+    <!-- 蓝牙权限（音视频通话可能需要） -->
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    
+    <!-- 音频焦点权限 -->
+    <uses-permission android:name="android.permission.AUDIO_FOCUS" />
+    
+    <!-- 前台服务权限 -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_PHONE_CALL" />
+    
+    <!-- 安装应用权限（升级功能） -->
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+    
+    <!-- 查询其他应用权限 -->
+    <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
+    
+    <application
+        android:label="集中营"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:usesCleartextTraffic="true">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:taskAffinity=""
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        
+        <!-- File Provider for APK install/update flows inherited from the old app. -->
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+            
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
+</manifest>

android/app/src/main/kotlin/io/openim/flutter/im_webview_app/MainActivity.kt

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+package io.openim.flutter.im_webview_app
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity : FlutterActivity()

android/app/src/main/kotlin/io/openim/flutter/openim/MainActivity.kt

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+package io.openim.flutter.openim
+
+import android.content.Intent
+import android.content.pm.PackageInfo
+import android.content.pm.PackageManager
+import android.net.Uri
+import android.os.Build
+import android.util.Log
+import androidx.core.content.FileProvider
+import io.flutter.embedding.android.FlutterActivity
+import org.conscrypt.Conscrypt
+import java.security.Security
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.MethodChannel
+import java.io.File
+
+class MainActivity : FlutterActivity() {
+    private val CHANNEL = "io.openim.flutter.openim/apk_info"
+    private val TAG = "MainActivity"
+
+    override fun onCreate(savedInstanceState: android.os.Bundle?) {
+        // 华为/荣耀/OPPO 等国产设备：在任意网络请求之前同步安装 Conscrypt，修复 SSL 握手失败（无 GMS 时系统 SSL 实现不完整）
+        try {
+            Security.insertProviderAt(Conscrypt.newProvider(), 1)
+            Log.d(TAG, "Conscrypt security provider installed (SSL fix for domestic devices)")
+        } catch (e: Exception) {
+            Log.w(TAG, "Conscrypt provider install failed: ${e.message}")
+        }
+        super.onCreate(savedInstanceState)
+    }
+
+    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
+        super.configureFlutterEngine(flutterEngine)
+        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
+            when (call.method) {
+                "getApkPackageName" -> {
+                    val apkPath = call.argument<String>("apkPath")
+                    if (apkPath != null) {
+                        try {
+                            val packageName = getApkPackageName(apkPath)
+                            result.success(packageName)
+                        } catch (e: Exception) {
+                            result.error("ERROR", "无法解析APK包名: ${e.message}", null)
+                        }
+                    } else {
+                        result.error("ERROR", "APK路径为空", null)
+                    }
+                }
+                "getCurrentPackageName" -> {
+                    try {
+                        val packageName = packageName
+                        result.success(packageName)
+                    } catch (e: Exception) {
+                        result.error("ERROR", "无法获取当前包名: ${e.message}", null)
+                    }
+                }
+                "canRequestPackageInstalls" -> {
+                    try {
+                        val canInstall = canRequestPackageInstalls()
+                        result.success(canInstall)
+                    } catch (e: Exception) {
+                        result.error("ERROR", "无法检查安装权限: ${e.message}", null)
+                    }
+                }
+                "installApk" -> {
+                    val apkPath = call.argument<String>("apkPath")
+                    if (apkPath != null) {
+                        try {
+                            val success = installApk(apkPath)
+                            result.success(success)
+                        } catch (e: Exception) {
+                            result.error("ERROR", "安装APK失败: ${e.message}", null)
+                        }
+                    } else {
+                        result.error("ERROR", "APK路径为空", null)
+                    }
+                }
+                else -> {
+                    result.notImplemented()
+                }
+            }
+        }
+    }
+
+    private fun getApkPackageName(apkPath: String): String? {
+        return try {
+            val packageManager = packageManager
+            val packageInfo: PackageInfo = packageManager.getPackageArchiveInfo(
+                apkPath,
+                PackageManager.GET_ACTIVITIES
+            ) ?: return null
+            packageInfo.packageName
+        } catch (e: Exception) {
+            null
+        }
+    }
+
+    /// 检查是否可以请求安装包权限（Android 8.0+）
+    private fun canRequestPackageInstalls(): Boolean {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            // Android 8.0+ 需要检查安装权限
+            packageManager.canRequestPackageInstalls()
+        } else {
+            // Android 8.0 以下版本默认允许安装
+            true
+        }
+    }
+
+    /// 使用 Intent 直接打开安装界面
+    private fun installApk(apkPath: String): Boolean {
+        return try {
+            val file = File(apkPath)
+            if (!file.exists()) {
+                return false
+            }
+
+            val intent = Intent(Intent.ACTION_VIEW).apply {
+                flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                
+                val apkUri = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                    // Android 7.0+ 使用 FileProvider
+                    FileProvider.getUriForFile(
+                        this@MainActivity,
+                        "${packageName}.fileprovider",
+                        file
+                    )
+                } else {
+                    // Android 7.0 以下直接使用 file://
+                    Uri.fromFile(file)
+                }
+                
+                setDataAndType(apkUri, "application/vnd.android.package-archive")
+                
+                // Android 7.0+ 需要添加临时读取权限
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                    addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                }
+            }
+
+            startActivity(intent)
+            true
+        } catch (e: Exception) {
+            false
+        }
+    }
+}

android/app/src/main/res/drawable-v21/launch_background.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

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

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

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

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

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

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">本地打包</string>
+</resources>

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

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

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

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+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path name="external_files" path="."/>
+    <cache-path name="cache" path="."/>
+    <external-cache-path name="external_cache" path="."/>
+    <files-path name="files" path="."/>
+</paths>

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

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  国内网络 / 国产手机（华为、荣耀、OPPO、小米等）兼容配置：
+  - cleartextTrafficPermitted：允许 HTTP，与后端是否 HTTPS 无关，部分 ROM 会严格检查
+  - trust-anchors system + user：系统证书 + 用户证书，兼容企业/校园网等需安装根证书的环境
+-->
+<network-security-config>
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="system" />
+            <!-- 兼容国内企业/校园网等需安装根证书或代理证书的环境（华为/荣耀/OPPO 等部分场景） -->
+            <certificates src="user" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>
+