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Android打包流程Gradle Plugin 主要 Task 分析

发布时间：2021-11-25作者：Topwo来源：原创点击：386

## Android 打包流程
官方流程图：
![](http://uploadqn.topwo.com/topwo_site/25a7ab70d478b5bc9276640a4dd597e4.png)

### 1.编译器将您的源代码转换成 DEX（Dalvik Executable) 文件（其中包括 Android 设备上运行的字节码），将所有其他内容转换成已编译资源。

### 2.APK 打包器将 DEX 文件和已编译资源合并成单个 APK。 不过，必须先签署 APK，才能将应用安装并部署到 Android 设备上。

### 3.APK 打包器使用调试或发布密钥库签署您的 APK：

### 4.在生成最终 APK 之前，打包器会使用 zipalign 工具对应用进行优化，减少其在设备上运行时占用的内存。

以 Task 的维度来看 apk 的打包，则分为以下流程：
```Groovy

:android-gradle-plugin-source:preBuild UP-TO-DATE

:android-gradle-plugin-source:preDebugBuild

:android-gradle-plugin-source:compileDebugAidl

:android-gradle-plugin-source:compileDebugRenderscript

:android-gradle-plugin-source:checkDebugManifest

:android-gradle-plugin-source:generateDebugBuildConfig

:android-gradle-plugin-source:prepareLintJar UP-TO-DATE

:android-gradle-plugin-source:generateDebugResValues

:android-gradle-plugin-source:generateDebugResources

:android-gradle-plugin-source:mergeDebugResources

:android-gradle-plugin-source:createDebugCompatibleScreenManifests

:android-gradle-plugin-source:processDebugManifest

:android-gradle-plugin-source:splitsDiscoveryTaskDebug

:android-gradle-plugin-source:processDebugResources

:android-gradle-plugin-source:generateDebugSources

:android-gradle-plugin-source:javaPreCompileDebug

:android-gradle-plugin-source:compileDebugJavaWithJavac

:android-gradle-plugin-source:compileDebugNdk NO-SOURCE

:android-gradle-plugin-source:compileDebugSources

:android-gradle-plugin-source:mergeDebugShaders

:android-gradle-plugin-source:compileDebugShaders

:android-gradle-plugin-source:generateDebugAssets

:android-gradle-plugin-source:mergeDebugAssets

:android-gradle-plugin-source:transformClassesWithDexBuilderForDebug

:android-gradle-plugin-source:transformDexArchiveWithExternalLibsDexMergerForDebug

:android-gradle-plugin-source:transformDexArchiveWithDexMergerForDebug

:android-gradle-plugin-source:transformClassesWithDexBuilderForDebug

:android-gradle-plugin-source:transformDexArchiveWithExternalLibsDexMergerForDebug

:android-gradle-plugin-source:transformDexArchiveWithDexMergerForDebug

:android-gradle-plugin-source:mergeDebugJniLibFolders

:android-gradle-plugin-source:transformNativeLibsWithMergeJniLibsForDebug

:android-gradle-plugin-source:transformNativeLibsWithStripDebugSymbolForDebug

:android-gradle-plugin-source:processDebugJavaRes NO-SOURCE

:android-gradle-plugin-source:transformResourcesWithMergeJavaResForDebug

:android-gradle-plugin-source:validateSigningDebug

:android-gradle-plugin-source:packageDebug

:android-gradle-plugin-source:assembleDebug

```
这些Task的对应实现类和作用如下表所示：
![](http://uploadqn.topwo.com/topwo_site/fef205f178d7e6d4b66d68c64565a178.png)

## 参考文档：
1).附官方文档：[https://android.googlesource.com/platform/tools/base/+/refs/tags/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/tasks](https://android.googlesource.com/platform/tools/base/+/refs/tags/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/tasks)
2).Android打包流程Gradle Plugin 主要 Task 分析：[https://www.jianshu.com/p/fdb9fd99314d](https://www.jianshu.com/p/fdb9fd99314d)

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