问题一

主APP里面报错：

tools:replace specified at line: for attribute android:appComponentFactory, but no new value specified main manifest (this file), line

    Attribute application@appComponentFactory value=(androidx.core.app.CoreComponentFactory) from [androidx.core:core:1.3.1] AndroidManifest.xml:24:18-86
    is also present at [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91 value=(android.support.v4.app.CoreComponentFactory).
    Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:9:5-24:19 to override.

按照提示添加，

tools:replace="android:appComponentFactory"

仍然报错，

> Task :app:processDebugMainManifest FAILED
[androidx.versionedparcelable:versionedparcelable:1.1.0] C:\Users\username\.gradle\caches\transforms-2\files-2.1\ee32a41b299ebcf4e78d691344f52243\versionedparcelable-1.1.0\AndroidManifest.xml Warning:
    Package name 'androidx.versionedparcelable' used in: androidx.versionedparcelable:versionedparcelable:1.1.0, com.android.support:versionedparcelable:28.0.0.
H:\Android\practice\QQ\app\src\main\AndroidManifest.xml:9:5-25:19 Error:
    tools:replace specified at line:9 for attribute android:appComponentFactory, but no new value specified
H:\Android\practice\QQ\app\src\main\AndroidManifest.xml Error:
    Validation failed, exiting

最后在APP里面的清单文件加入，不用再别的module里面添加

 android:appComponentFactory="renyizifu任意字符，不能为空，仍然报错，但是不影响运行"
 tools:replace="android:appComponentFactory"

2021-11-23 19:02:20.045 14285-14285/com.cc.qq E/LoadedApk: Unable to instantiate appComponentFactory
    java.lang.ClassNotFoundException: Didn't find class "com.cc.qq.AppComponentFactory" on path: DexPathList[[zip file "/data/app/com.cc.qq-VXr3KxaFWBhe82itimOPVA==/base.apk"],nativeLibraryDirectories=[/data/app/com.cc.qq-VXr3KxaFWBhe82itimOPVA==/lib/arm64, /system/lib64, /hw_product/lib64, /system/product/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:209)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.app.LoadedApk.createAppFactory(LoadedApk.java:270)
        at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:1005)
        at android.app.LoadedApk.getClassLoader(LoadedApk.java:1129)
        at android.app.LoadedApk.getResources(LoadedApk.java:1419)
        at android.app.ContextImpl.createAppContext(ContextImpl.java:2662)
        at android.app.ContextImpl.createAppContext(ContextImpl.java:2644)

继续报错

Duplicate class android.support.v4.app.INotificationSideChannel found 
in modules core-1.3.1-runtime (androidx.core:core:1.3.1)
 and support-compat-28.0.0-runtime (com.android.support:support-compat:28.0.0)
Duplicate class android.support.v4.app.INotificationSideChannel found in modules core-1.3.1-runtime (androidx.core:core:1.3.1) and support-compat-28.0.0-runtime (com.android.support:support-compat:28.0.0)


Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules core-1.3.1-runtime (androidx.core:core:1.3.1) and support-compat-28.0.0-runtime (com.android.support:support-compat:28.0.0)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules core-1.3.1-runtime (androidx.core:core:1.3.1) and support-compat-28.0.0-runtime (com.android.support:support-compat:28.0.0)
Duplicate class android.support.v4.graphics.drawable.IconCompatParc
....
Duplicate class androidx.core.graphics.drawable.IconCompatParcelizer found in modules core-1.3.1-runtime (androidx.core:core:1.3.1) and support-compat-28.0.0-runtime (com.android.support:support-compat:28.0.0)
Duplicate class androidx.core.internal.package-info found in modules core-1.3.1-runtime (androidx.core:core:1.3.1) and support-compat-28.0.0-runtime (com.android.support:support-compat:28.0.0)
Duplicate class androidx.versionedparcelable.CustomVersionedParcelable found in modules versionedparcelable-1.1.0-runtime (androidx.versionedparcelable:versionedparcelable:1.1.0) and versionedparcelable-28.0.0-runtime (com.android.support:versionedparcelable:28.0.0)
Duplicate class androidx.versionedparcelable

* What went wrong:
Execution failed for task ':app:mergeDebugJavaResource'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.MergeJavaResWorkAction
   > 2 files found with path 'META-INF/androidx.cursoradapter_cursoradapter.version'.
     Adding a packagingOptions block may help, please refer to
     https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html

....

解决方案：根目录下的gradle.properties添加

# 这是因为混合支持库。通过添加这些行选择androidX作为您的支持库
android.useAndroidX=true
#上面一句默认存在，添加下面一句
android.enableJetifier=true

总的添加代码为

android.useAndroidX=true
# 这是因为混合支持库。通过添加这些行选择androidX作为您的支持库
android.enableJetifier=true

 android:appComponentFactory="任意字符"
 tools:replace="android:appComponentFactory"
    <application
        android:name=".App"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.QQ"
        android:appComponentFactory="任意字符x"
        tools:replace="android:appComponentFactory">

组件化注意事项

一、commonLib包中引入第三方的库为api 而非implementation，不然Module引入调用不到该库依赖

    implementation 'androidx.appcompat:appcompat:1.2.0'

    // 替换成最新版本, 需要注意的是api
    api 'com.alibaba:arouter-api:1.5.2'
    annotationProcessor 'com.alibaba:arouter-compiler:1.5.2'

    api "androidx.room:room-runtime:$room_version"
    annotationProcessor "androidx.room:room-compiler:$room_version"
    // optional - RxJava2 support for Room
    api "androidx.room:room-rxjava2:$room_version"
    // optional - RxJava3 support for Room
    api "androidx.room:room-rxjava3:$room_version"

二、组件化里面的字module处理事项

1、组件里面的module里面需要合并AndroidManifest.xml资源、android 目录下，跟defaultConfig 同级

2、判断是否为发布模式变更application和Library，跟android节点同级，根目录

3、判断是否为发布模式变更是否有applicationID等，android-defaultConfig 节点下

4、有自定义处理器需要添加选项配置参数defaultConfig 节点

比如order中

if (isRelease) {
// 如果是发布版本时，各个模块都不能独立运行
    apply plugin: 'com.android.library'
} else {
    apply plugin: 'com.android.application'
}
android {
    ...
    defaultConfig {
      ....
        if (!isRelease) {
            //  如果是集成化模式，不能有applicationId组件化模式能独立运行才能有applicationId
            applicationId "com.cc.order"
       }       

    
        // 这个方法接收三个非空的参数，第一个：确定值的类型，第二个：指定key的名字，第三个：传值（必须是String）
        // 为什么需要定义这个？因为src代码中有可能需要用到跨模块交互，如果是组件化模块显然不行
        // 切记：不能在android根节点，只能在defaultConfig或buildTypes节点下
        buildConfigField("boolean", "isRelease", String.valueOf(isRelease))

        // 在gradle文件中配置选项参数值（用于APT传参接收）
        // 切记：必须写在defaultConfig节点下
        javaCompileOptions {
            annotationProcessorOptions {
                arguments = [moduleName: project.getName(), packageNameForAPT: packageNameForAPT]
            }
        }
     // 配置资源路径，方便测试环境，打包不集成到正式环境
    sourceSets {
        main {
            if (!isRelease) {
                // 如果是组件化模式，需要单独运行时
                manifest.srcFile 'src/main/debug/AndroidManifest.xml'
            } else {
                // 集成化模式，整个项目打包apk
                manifest.srcFile 'src/main/AndroidManifest.xml'
                java {
                    // release 时 debug 目录下文件不需要合并到主工程
                    exclude '**/debug/**'
                }
            }
        }
    }
}

三、清单文件合并子Module中在modulename->src->main->下创建debug文件，跟java同级，复制AndroidManifest.xml到debug目录中。

image.png

四、AutoService、SPI机制的resource、跨进程通信的aidl、清单文件合并的debug文件都在src->main目录下

image.png

三、集成的问题

1、各个module的布局一定不能名字重复

2、各个module的path路径一定要注意不能重复

3、初始化ARouter的时候看看打印日志if环境，不然AROuter日志不打印

转换异常，但是导包正常，一般是布局名字重复，更改布局名字

2021-11-24 01:05:32.922 3684-3684/com.cc.qq E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.cc.qq, PID: 3684
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cc.qq/com.cc.personnal.MainActivity}: java.lang.ClassCastException: com.cc.qq.databinding.ActivityMainBindingImpl cannot be cast to com.cc.personnal.databinding.ActivityMainBinding
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4060)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4247)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2613)
        at android.os.Handler.dispatchMessage(Handler.java:110)
        at android.os.Looper.loop(Looper.java:219)
        at android.app.ActivityThread.main(ActivityThread.java:8668)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1109)
     Caused by: java.lang.ClassCastException: com.cc.qq.databinding.ActivityMainBindingImpl cannot be cast to com.cc.personnal.databinding.ActivityMainBinding
        at com.cc.personnal.MainActivity.onCreate(MainActivity.java:21)
        at android.app.Activity.performCreate(Activity.java:8214)
        at android.app.Activity.performCreate(Activity.java:8202)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1320)

各个module的path路径一定要注意不能重复，不匹配的情况,写成常量

package com.cc.common.arouter;

public class RouterPath {
    public static final String APP_GROUP="app";
    public static final String ORDER_GROUP="order";
    public static final String PERSONAL_GROUP="personal";


    //app
    public static final String ROUT_APP_MainActivity="/app/MainActivity";

    //order
    public static final String ROUT_ORDER_MainActivity="/order/MainActivity";

    //personal
    public static final String ROUT_PERSONAL_MainActivity="/pesonal/MainActivity";

}

3、注意初始化的BuildConfig不要弄错了，没有日志证明if为false

   // 这两行必须写在init之前，否则这些配置在init过程中将无效
        if (BuildConfig.DEBUG) {
            // 打印日志
            ARouter.openLog();
            // 开启调试模式(如果在InstantRun模式下运行，必须开启调试模式！线上版本需要关闭,否则有安全风险)
            ARouter.openDebug();
        }
        // 尽可能早，推荐在Application中初始化
        ARouter.init(this);

四、注解处理器的问题，每个gradle文件下要添加注解处理器的生成目录

android{
  ...
  defaultConfig{
   javaCompileOptions {
            annotationProcessorOptions {
                arguments = [AROUTER_MODULE_NAME: project.getName()]
            }
        }
  }
}

五、注解处理器dependencies下的依赖问题

1、commonLibrary依赖ARouter:api，透传

2、AppModule、OrderModule、PersonalModule依赖commonLibrary:implementation

3、AppModule依赖OrderModule、PersonalModule:implementation

4、AppModule依赖了OrderModule、PersonalModule，可不依赖commonLirabry，那AppModule依赖了OrderModule、PersonalModule改为api

五的点有问题验证，dependencies中最好都加上

 implementation project(':common') // 公共基础库

    implementation 'com.alibaba:arouter-api:1.5.2'
    annotationProcessor 'com.alibaba:arouter-compiler:1.5.2'