# 03 · 构建与运行

> 从 0 到能装到真机跑的 APK,每一步都给具体命令。
>
> 假设你本地已经有:**Android Studio Hedgehog(2023.1.1)+** + **JDK 17** + **Android SDK 35** + **Kotlin 2.0.21**。

---

## 0. 环境清单

| 工具 | 版本 | 验证命令 |
|---|---|---|
| Android Studio | Hedgehog (2023.1.1) 或更新 | Help → About |
| JDK | 17 | `java -version` |
| Android SDK | 35 | SDK Manager 看 "Android 15.0" |
| Gradle | 8.10+(Studio 自带) | `gradle --version` |
| Kotlin | 2.0.21(项目自带)| 无所谓 |

**JDK 注意**:**JDK 17**,不是 11、不是 21。AGP 8.7 要求 JDK 17。

---

## 1. 新建工程

1. **File → New → New Project**
2. 选 **Empty Activity (Compose)**
3. 配置:

| 项 | 值 |
|---|---|
| Name | `Diary News` |
| Package name | `com.diary.news` |
| Save location | `~/projects/diary-news-android/` |
| Language | **Kotlin** |
| Minimum SDK | **API 24 ("Nougat")** |
| Build configuration language | **Kotlin DSL** |
| ☑️ Use Version Catalog | **勾上**(用 `libs.versions.toml`)|

4. **Finish**

---

## 2. 改版本目录

打开 `gradle/libs.versions.toml`,**整体替换**为:

```toml
[versions]
agp = "8.7.2"
kotlin = "2.0.21"
ksp = "2.0.21-1.0.27"

# AndroidX & Compose
compose-bom = "2024.10.01"
activity-compose = "1.9.3"
lifecycle = "2.8.7"
navigation-compose = "2.8.4"

# Network
retrofit = "2.11.0"
retrofit-kotlinx-converter = "1.0.0"
okhttp = "4.12.0"
kotlinx-serialization = "1.7.3"
kotlinx-coroutines = "1.9.0"

# DI
hilt = "2.52"
hilt-navigation-compose = "1.2.0"

# Persistence
room = "2.6.1"
security-crypto = "1.1.0-alpha06"

# Paging
paging = "3.3.4"
paging-compose = "3.3.4"

# Image
coil = "2.7.0"

# Test
junit = "4.13.2"
mockk = "1.13.13"
turbine = "1.2.0"

[libraries]
# Core
kotlinx-coroutines-android = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-android", version.ref = "kotlinx-coroutines" }
kotlinx-coroutines-test = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-test", version.ref = "kotlinx-coroutines" }
kotlinx-serialization-json = { module = "org.jetbrains.kotlinx:kotlinx-serialization-json", version.ref = "kotlinx-serialization" }

# Compose
androidx-activity-compose = { module = "androidx.activity:activity-compose", version.ref = "activity-compose" }
androidx-compose-bom = { module = "androidx.compose:compose-bom", version.ref = "compose-bom" }
androidx-compose-ui = { module = "androidx.compose.ui:ui" }
androidx-compose-ui-graphics = { module = "androidx.compose.ui:ui-graphics" }
androidx-compose-ui-tooling = { module = "androidx.compose.ui:ui-tooling" }
androidx-compose-ui-tooling-preview = { module = "androidx.compose.ui:ui-tooling-preview" }
androidx-compose-material3 = { module = "androidx.compose.material3:material3" }
androidx-compose-material-icons = { module = "androidx.compose.material:material-icons-extended" }
androidx-lifecycle-viewmodel-compose = { module = "androidx.lifecycle:lifecycle-viewmodel-compose", version.ref = "lifecycle" }
androidx-lifecycle-runtime-compose = { module = "androidx.lifecycle:lifecycle-runtime-compose", version.ref = "lifecycle" }
androidx-navigation-compose = { module = "androidx.navigation:navigation-compose", version.ref = "navigation-compose" }

# Network
retrofit = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
retrofit-kotlinx-serialization = { module = "com.jakewharton.retrofit:retrofit2-kotlinx-serialization-converter", version.ref = "retrofit-kotlinx-converter" }
okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhttp" }
okhttp-logging = { module = "com.squareup.okhttp3:logging-interceptor", version.ref = "okhttp" }

# DI
hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt" }
hilt-compiler = { module = "com.google.dagger:hilt-android-compiler", version.ref = "hilt" }
hilt-navigation-compose = { module = "androidx.hilt:hilt-navigation-compose", version.ref = "hilt-navigation-compose" }

# Persistence
room-runtime = { module = "androidx.room:room-runtime", version.ref = "room" }
room-ktx = { module = "androidx.room:room-ktx", version.ref = "room" }
room-compiler = { module = "androidx.room:room-compiler", version.ref = "room" }
room-paging = { module = "androidx.room:room-paging", version.ref = "room" }
security-crypto = { module = "androidx.security:security-crypto-ktx", version.ref = "security-crypto" }

# Paging
paging-runtime = { module = "androidx.paging:paging-runtime-ktx", version.ref = "paging" }
paging-compose = { module = "androidx.paging:paging-compose", version.ref = "paging-compose" }

# Image
coil-compose = { module = "io.coil-kt:coil-compose", version.ref = "coil" }

# Test
junit = { module = "junit:junit", version.ref = "junit" }
mockk = { module = "io.mockk:mockk", version.ref = "mockk" }
turbine = { module = "app.cash.turbine:turbine", version.ref = "turbine" }

[plugins]
android-application = { id = "com.android.application", version.ref = "agp" }
kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }
```

---

## 3. 改 `app/build.gradle.kts`

整体替换为:

```kotlin
plugins {
 alias(libs.plugins.android.application)
 alias(libs.plugins.kotlin.android)
 alias(libs.plugins.kotlin.compose)
 alias(libs.plugins.kotlin.serialization)
 alias(libs.plugins.ksp)
 alias(libs.plugins.hilt)
}

android {
 namespace = "com.diary.news"
 compileSdk = 35

 defaultConfig {
 applicationId = "com.diary.news"
 minSdk = 24
 targetSdk = 35
 versionCode = 1
 versionName = "0.1.0"

 testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
 }

 buildTypes {
 debug {
 isMinifyEnabled = false
 }
 release {
 isMinifyEnabled = true
 proguardFiles(
 getDefaultProguardFile("proguard-android-optimize.txt"),
 "proguard-rules.pro",
 )
 // debug 阶段先不上签名,直接装 debug APK
 // 真要 release,见 §6
 }
 }

 compileOptions {
 sourceCompatibility = JavaVersion.VERSION_17
 targetCompatibility = JavaVersion.VERSION_17
 }

 kotlinOptions {
 jvmTarget = "17"
 }

 buildFeatures {
 compose = true
 }

 packaging {
 resources {
 excludes += "/META-INF/{AL2.0,LGPL2.1}"
 }
 }
}

dependencies {
 // Compose BOM 统一管
 implementation(platform(libs.androidx.compose.bom))
 implementation(libs.androidx.activity.compose)
 implementation(libs.androidx.compose.ui)
 implementation(libs.androidx.compose.ui.graphics)
 implementation(libs.androidx.compose.ui.tooling.preview)
 implementation(libs.androidx.compose.material3)
 implementation(libs.androidx.compose.material.icons)
 implementation(libs.androidx.lifecycle.viewmodel.compose)
 implementation(libs.androidx.lifecycle.runtime.compose)
 implementation(libs.androidx.navigation.compose)
 debugImplementation(libs.androidx.compose.ui.tooling)

 // Coroutines
 implementation(libs.kotlinx.coroutines.android)

 // Network
 implementation(libs.retrofit)
 implementation(libs.retrofit.kotlinx.serialization)
 implementation(libs.okhttp)
 implementation(libs.okhttp.logging)

 // Serialization
 implementation(libs.kotlinx.serialization.json)

 // DI
 implementation(libs.hilt.android)
 ksp(libs.hilt.compiler)
 implementation(libs.hilt.navigation.compose)

 // Persistence
 implementation(libs.room.runtime)
 implementation(libs.room.ktx)
 implementation(libs.room.paging)
 ksp(libs.room.compiler)
 implementation(libs.security.crypto)

 // Paging
 implementation(libs.paging.runtime)
 implementation(libs.paging.compose)

 // Image
 implementation(libs.coil.compose)

 // Test
 testImplementation(libs.junit)
 testImplementation(libs.mockk)
 testImplementation(libs.turbine)
 testImplementation(libs.kotlinx.coroutines.test)
}
```

---

## 4. 网络安全白名单(关键!)

### 4.1 `app/src/main/AndroidManifest.xml`

整体替换:

```xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

 <application
 android:name=".DiaryNewsApp"
 android:allowBackup="false"
 android:dataExtractionRules="@xml/data_extraction_rules"
 android:fullBackupContent="@xml/backup_rules"
 android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name"
 android:roundIcon="@mipmap/ic_launcher_round"
 android:supportsRtl="true"
 android:theme="@style/Theme.DiaryNews"
 android:networkSecurityConfig="@xml/network_security_config"
 tools:targetApi="35"
 xmlns:tools="http://schemas.android.com/tools">

 <activity
 android:name=".MainActivity"
 android:exported="true"
 android:theme="@style/Theme.DiaryNews">
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 </application>
</manifest>
```

### 4.2 `app/src/main/res/xml/network_security_config.xml`

新建文件:

```xml
<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
 <!-- 默认所有域走系统 HTTPS(拒绝明文)-->
 <base-config cleartextTrafficPermitted="false">
 <trust-anchors>
 <certificates src="system" />
 </trust-anchors>
 </base-config>

 <!-- 例外:只对后端 server 放行明文 HTTP -->
 <domain-config cleartextTrafficPermitted="true">
 <domain includeSubdomains="false">207.57.129.228</domain>
 </domain-config>
</network-security-config>
```

### 4.3 `app/src/main/res/xml/backup_rules.xml`(禁止备份 token)

```xml
<?xml version="1.0" encoding="utf-8"?>
<full-backup-content>
 <exclude domain="sharedpref" path="auth_prefs.xml" />
</full-backup-content>
```

### 4.4 `app/src/main/res/xml/data_extraction_rules.xml`(Android 12+)

```xml
<?xml version="1.0" encoding="utf-8"?>
<data-extraction-rules>
 <cloud-backup>
 <exclude domain="sharedpref" path="auth_prefs.xml" />
 </cloud-backup>
 <device-transfer>
 <exclude domain="sharedpref" path="auth_prefs.xml" />
 </device-transfer>
</data-extraction-rules>
```

---

## 5. ProGuard / R8 规则(发布包必加)

`app/proguard-rules.pro`:

```proguard
# Retrofit
-keepattributes Signature, InnerClasses, EnclosingMethod
-keepattributes RuntimeVisibleAnnotations, RuntimeVisibleParameterAnnotations
-keepattributes AnnotationDefault
-keep,allowobfuscation,allowshrinking interface retrofit2.Call
-keep,allowobfuscation,allowshrinking class retrofit2.Response
-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation

# kotlinx.serialization
-keepattributes *Annotation*, InnerClasses
-dontnote kotlinx.serialization.AnnotationsKt

-keep,includedescriptorclasses class com.diary.news.**$$serializer { *; }
-keepclassmembers class com.diary.news.** {
 *** Companion;
 }
-keepclasseswithmembers class com.diary.news.** {
 kotlinx.serialization.KSerializer serializer(...);
 }

# OkHttp
-dontwarn org.conscrypt.**
-dontwarn org.bouncycastle.**
-dontwarn org.openjsse.**

# Hilt
-keep class dagger.hilt.** { *; }
-keep class * extends dagger.hilt.android.HiltAndroidApp
```

---

## 6. 第一次 Sync & Build

### 6.1 Sync Gradle

- Android Studio 顶部会弹"Gradle files have changed..." → **Sync Now**
- 或菜单 **File → Sync Project with Gradle Files**
- 等 5-15 分钟(下载依赖)

### 6.2 第一次 build

```bash
# 命令行
./gradlew assembleDebug

# 或 Studio 右上角 ▶️ 直接 Run
```

预期:
- `BUILD SUCCESSFUL`
- 产物在 `app/build/outputs/apk/debug/app-debug.apk`

### 6.3 跑在模拟器

1. 工具栏 AVD Manager → Create Virtual Device → Pixel 7 + API 35
2. 启动模拟器(等 30s-1min)
3. Run ▶️

**模拟器坑**:
- 模拟器自己的 IP 是 `10.0.2.2`,不是 `127.0.0.1`
- 但我们的目标是 `207.57.129.228`(真实服务器),**模拟器直连外网就行,无需特殊配置**
- 如果你只是想测本地后端,临时把 `network_security_config.xml` 改成 `10.0.2.2` 白名单

### 6.4 跑在真机

1. **设置 → 关于手机 → 连续点 7 次"版本号"** → 开启开发者模式
2. **设置 → 系统 → 开发者选项 → 打开 USB 调试**
3. USB 连电脑 → 手机弹"允许 USB 调试" → 确定
4. Studio 右上角设备列表选你的真机 → Run ▶️

---

## 7. 配置服务器地址(可切换 debug / release)

**MVP 写死在 `BuildConfig`**。

在 `app/build.gradle.kts` 的 `defaultConfig` 加:

```kotlin
defaultConfig {
 // ...
 buildConfigField("String", "API_BASE_URL", "\"http://207.57.129.228:3000/api/v1/\"")
}

buildTypes {
 debug {
 buildConfigField("String", "API_BASE_URL", "\"http://207.57.129.228:3000/api/v1/\"")
 }
 release {
 buildConfigField("String", "API_BASE_URL", "\"http://207.57.129.228:3000/api/v1/\"")
 // 后续要换 https,改这里 + 加证书
 }
}
```

代码里用:

```kotlin
@Provides @Singleton
fun provideRetrofit(okHttp: OkHttpClient): Retrofit =
 Retrofit.Builder()
 .baseUrl(BuildConfig.API_BASE_URL)
 .client(okHttp)
 .addConverterFactory(json.asConverterFactory("application/json".toMediaType()))
 .build()
```

---

## 8. 调试技巧

### 8.1 OkHttp 日志

```kotlin
@Provides @Singleton
fun provideOkHttp(
 tokenStore: TokenStore,
): OkHttpClient =
 OkHttpClient.Builder()
 .addInterceptor(AuthInterceptor(tokenStore))
 .addInterceptor(HttpLoggingInterceptor().apply {
 level = if (BuildConfig.DEBUG) Level.BODY else Level.NONE
 })
 .authenticator(TokenAuthenticator(tokenStore, ...))
 .connectTimeout(15, TimeUnit.SECONDS)
 .readTimeout(30, TimeUnit.SECONDS)
 .build()
```

`Level.BODY` 会在 Logcat 打印所有请求和响应体(包含 token!小心)。

**生产包务必改回 `Level.NONE`**。

### 8.2 Compose Preview

```kotlin
@Preview(showBackground = true)
@Composable
fun ArticleCardPreview() {
 DiaryNewsTheme {
 ArticleCard(
 a = Article(
 id = 1,
 sourceName = "DW",
 sourceSlug = "dw",
 title = "Sample title",
 titleZh = "示例标题",
 bodyZhText = "示例正文...",
 ...
 ),
 onClick = {},
 )
 }
}
```

### 8.3 Layout Inspector

Studio → **Tools → Layout Inspector** → 选进程 → 实时看 Compose 树。

### 8.4 抓包

推荐 **Charles** 或 **mitmproxy**:
- 模拟器:WiFi → 长按 → 修改网络 → 手动代理 → 127.0.0.1:8888
- 真机:Charles Proxy + 安装证书
- 注意:**mitmproxy 会让 HTTPS 失效**(因为加了第三方 CA),我们的 HTTP 不受影响

---

## 9. CI(可选,MVP 不强求)

如果你想每次 push 自动出 debug APK:

`.github/workflows/build.yml`:

```yaml
name: Build APK
on:
 push:
 branches: [main]
jobs:
 build:
 runs-on: ubuntu-latest
 steps:
 - uses: actions/checkout@v4
 - uses: actions/setup-java@v4
 with:
 distribution: 'temurin'
 java-version: '17'
 - name: Grant execute permission for gradlew
 run: chmod +x gradlew
 - name: Build
 run: ./gradlew assembleDebug
 - name: Upload APK
 uses: actions/upload-artifact@v4
 with:
 name: app-debug
 path: app/build/outputs/apk/debug/app-debug.apk
```

---

## 10. 常见报错速查

| 报错 | 原因 | 解决 |
|---|---|---|
| `Cleartext HTTP traffic to 207.57.129.228 not permitted` | 没配 network_security_config | 装 §4 |
| `Cannot resolve symbol 'hiltViewModel'` | 没加 `hilt-navigation-compose` | 装 §2 依赖 |
| `Hilt: @AndroidEntryPoint ... missing binding` | Application 没 `@HiltAndroidApp` | 检查 `DiaryNewsApp.kt` |
| `KSP not found` | KSP 版本与 Kotlin 不匹配 | 检查 `ksp` 版本号 |
| `Plugin [id: 'com.google.devtools.ksp'] was not found` | settings.gradle.kts 没声明 | 在 `pluginManagement` 块加 |
| `Composable invocations can only happen from the context of a @Composable function` | 在 `LaunchedEffect` 里调非 suspend 阻塞 | 加 `withContext(Dispatchers.IO)` |
| `JSON decode error: Polymorphic serializer was not found` | 后端返回了 polymorphic 类型,DTO 没声明 | DTO 加 `@JsonClassDiscriminator` 或 sealed class |
| `401 Unauthorized` 一片 | Token 过期 / 错 | 启动 app 看 logcat 的 OkHttp 日志,确认 refresh 接口通不通 |

---

## 11. 发布签名(真要上架时再弄)

```bash
# 生成 keystore
keytool -genkey -v -keystore diary-news.jks -keyalg RSA -keysize 2048 \
 -validity 10000 -alias diary-news

# 在 ~/.gradle/gradle.properties 加
DIARY_NEWS_STORE_FILE=diary-news.jks
DIARY_NEWS_STORE_PASSWORD=...
DIARY_NEWS_KEY_ALIAS=diary-news
DIARY_NEWS_KEY_PASSWORD=...

# app/build.gradle.kts
signingConfigs {
 create("release") {
 storeFile = file(providers.gradleProperty("DIARY_NEWS_STORE_FILE").get())
 storePassword = providers.gradleProperty("DIARY_NEWS_STORE_PASSWORD").get()
 keyAlias = providers.gradleProperty("DIARY_NEWS_KEY_ALIAS").get()
 keyPassword = providers.gradleProperty("DIARY_NEWS_KEY_PASSWORD").get()
 }
}
buildTypes {
 release {
 signingConfig = signingConfigs.getByName("release")
 }
}
```

**MVP 阶段不弄**,直接 debug APK 装手机上跑就够了。