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项目引用Kotlin与databinding,ARouter,A

项目引用Kotlin与databinding,ARouter,A

作者: Magic旭 | 来源:发表于2019-01-09 14:26 被阅读45次

    个人项目的整体结构

    project.png
    推荐依赖API的做法
    • 我私人创建多模块开发,所以模块之前添加依赖会导致version五花八门,这个建议在根目录下创建dependencies.gradle,用于对依赖统一进行管理,代码如下(new file时候把后缀名输入就可以粗暴创建gradle文件了)
    
    ext {
    
        //true 每个业务Module可以单独开发
        //false 每个业务Module以lib的方式运行
        //修改之后需要Sync方可生效
        isModule = false
    
        compileSdkVersion = 26
        minSdkVersion = 15
        targetSdkVersion = 26
        androidSupportLibraryVersion = '26.1.0'
    
        butterknifeVersion = '8.1.0'
    
        versions = [
                arouterApiVersion       : "1.4.1",
                arouterCompilerVersion  : "1.2.2",
                arouterannotationVersion: "1.0.4",
                arouterRegisterVersion  : "1.0.2",
                archLifecycleVersion    : "1.0.0",
                archRoomVersion         : "1.0.0",
        ]
    
        support = [
                'v4' : "com.android.support:support-v4:$androidSupportLibraryVersion",
                'annotations'           : "com.android.support:support-annotations:$androidSupportLibraryVersion",
                'compat'                : "com.android.support:support-compat:$androidSupportLibraryVersion",
                'appcompat'             : "com.android.support:appcompat-v7:$androidSupportLibraryVersion",
                'gridlayout'            : "com.android.support:gridlayout-v7:$androidSupportLibraryVersion",
                'recyclerview'          : "com.android.support:recyclerview-v7:$androidSupportLibraryVersion",
                'design'                : "com.android.support:design:$androidSupportLibraryVersion",
                'cardview'              : "com.android.support:cardview-v7:$androidSupportLibraryVersion",
                'preference'            : "com.android.support:preference-v7:$androidSupportLibraryVersion",
                'multidex'              : 'com.android.support:multidex:1.0.3',
                'constraintlayout'      : 'com.android.support.constraint:constraint-layout:1.0.2',
                'exifinterface'         : "com.android.support:exifinterface:$androidSupportLibraryVersion",
                'testrunner'            : 'com.android.support.test:runner:1.0.2',
                'room'                  : "android.arch.persistence.room:runtime:1.0.0",
                'core'                  : "com.android.support:support-core-utils:$androidSupportLibraryVersion",
                'lifecycle'             : "android.arch.lifecycle:extensions:${versions["archLifecycleVersion"]}",
                'lifecycle_compile'     : "android.arch.lifecycle:compiler:${versions["archLifecycleVersion"]}",
                'room'                  : "android.arch.persistence.room:runtime:${versions["archRoomVersion"]}",
                'room_compile'          : "android.arch.persistence.room:compiler:${versions["archRoomVersion"]}"
    
        ]
    
        third = [
                'arouter_api'           : "com.alibaba:arouter-api:${versions["arouterApiVersion"]}",
                'arouter_compiler'      : "com.alibaba:arouter-compiler:${versions["arouterCompilerVersion"]}",
                'arouter_annotation'    : "com.alibaba:arouter-annotation:${versions["arouterannotationVersion"]}",
                'arouter-register'      : "com.alibaba:arouter-register:${versions["arouterRegisterVersion"]}",
                'butterknife'           : "com.jakewharton:butterknife:$butterknifeVersion",
                'butterknife_compiler'  : "com.jakewharton:butterknife-compiler:$butterknifeVersion",
    
        ]
    }
    
    
    • 新建完gradle文件后,必须要与项目root 关联起来,要不引用时候会报错的。引用方法:找到project下的gradle,用apply from加入对dependencies.gradle的依赖。
    apply from:"dependencies.gradle"
    buildscript {
        ext.kotlin_version = '1.2.71'
    
        repositories {
            maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/' }
            maven{ url 'https://maven.aliyun.com/repository/google' }
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.1.0'
            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
            classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        }
    }
    
    allprojects {
        repositories {
            maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/' }
            maven{ url 'https://maven.aliyun.com/repository/google' }
        }
    }
    
    task clean(type: Delete) {
        delete rootProject.buildDir
    }
    

    问题场景

    原本java的项目引入Kotlin作为开发语言,在模块还没引用kotlin之前是采用databinding和ARouter进行ui绑定和模块界面跳转的,但是引入Kotlin后出现问题1:databinding冲突;问题2:ARouter提示跳转路径找不到;问题3:Android Architecture Components提示找不到ViewModelProviders

    解决办法

    问题一,与databinding冲突解决方法

    在自己的模块的gradle文件进行配置,我是在module_main模块中引入Kotlin进行开发的,所以我需要在app(module_main)build.gradle文件中添加一下配置信息有

    • apply plugin: 'kotlin-kapt'
    • kapt "com.android.databinding:compiler:3.1.0" (3.1.0 is your gradle version)
    • kapt {generateStubs = true}
    apply plugin: 'com.android.library'
    apply plugin: 'kotlin-android'
    apply plugin: 'kotlin-kapt'
    android {
          ………………………………
        }
    
        buildTypes {
            ………………………………
        }
    
        dataBinding {
            enabled true
        }
    
    }
    
    dependencies {
       ………………………………
        kapt "com.android.databinding:compiler:3.1.0"
    }
    
    kapt {
        generateStubs = true
    }
    
    repositories {
        mavenCentral()
    }
    
    问题二,ARouter提示找不到跳转路径的解决办法

    这个仅使用与你项目本来是可以用ARouter来进行跳转的,在跳转到Kotlin的Activity时候提示找不到路径的场景。

    1. 原本模块在纯java模块下的ARouter的gradle配置信息如下
    • javaCompileOptions {
      annotationProcessorOptions {
      arguments = [ moduleName : project.getName() ]
      }
      annotationProcessorOptions {
      arguments = [AROUTER_MODULE_NAME: project.getName()]
      }
      }
    • implementation rootProject.ext.third["arouter_api"]
    • annotationProcessor rootProject.ext.third["arouter_compiler"]
    android {
        compileSdkVersion rootProject.ext.compileSdkVersion
        defaultConfig {
            //rootProject.ext是依赖与dependencies.gradle定义的属性
            minSdkVersion rootProject.ext.minSdkVersion
            targetSdkVersion rootProject.ext.targetSdkVersion
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
            //Arouter路由配置(每个Module都需要添加,要不然无法跳转)
            javaCompileOptions {
                annotationProcessorOptions {
                    arguments = [ moduleName : project.getName() ]
                }
                annotationProcessorOptions {
                    arguments = [AROUTER_MODULE_NAME: project.getName()]
                }
            }
        }
    
        buildTypes {
            release {
                ………………
            }
            debug {
               ………………
            }
        }
    }
    dependencies {
        implementation fileTree(dir: 'libs', include: ['*.jar'])
         …………………………
        //Arouter路由,因为common模块(通用模块)引用了arouter_api,所以该模块不需要再引用,这里要自己区分api与implementation
    //    implementation rootProject.ext.third["arouter_api"]
        implementation project(':common')
        annotationProcessor rootProject.ext.third["arouter_compiler"]
    }
    
    1. 模块添加Kotlin代码后,在没有修改gradle配置信息情况下,导致ARouter提示找不到相关的UI的路径。原因是因为Kotlin的插件与Java不同,Java不支持Kotlin的代码,但是Kotlin的插件却完美支持Kotlin与Java代码。下面我们需要修改gradle信息如下
    • kapt {
      arguments {
      arg("moduleName", project.getName())
      arg("AROUTER_MODULE_NAME",project.getName())
      }
      generateStubs = true
      }
    • kapt rootProject.ext.third["arouter_compiler"]
    apply plugin: 'com.android.library'
    apply plugin: 'kotlin-android'
    apply plugin: 'kotlin-kapt'
    android {
        compileSdkVersion rootProject.ext.compileSdkVersion
        defaultConfig {
            ……………………
            //Arouter路由配置(每个Module都需要添加,要不然无法跳转)
    //        javaCompileOptions {
    //            annotationProcessorOptions {
    //                arguments = [ moduleName : project.getName() ]
    //            }
    //            annotationProcessorOptions {
    //                arguments = [AROUTER_MODULE_NAME: project.getName()]
    //            }
    //        }
            //如果存在kotlin和java代码必须配置下面的代码
            kapt {
                arguments {
                    arg("moduleName", project.getName())
                    arg("AROUTER_MODULE_NAME",project.getName())
                }
                generateStubs = true
            }
        }
    
        buildTypes {
           …………
        }
    
        dataBinding {
            enabled true
        }
    
    }
    
    dependencies {
        implementation fileTree(dir: 'libs', include: ['*.jar'])
       …………………………
        //Arouter路由,因为common模块引用了arouter_api,所以该模块不需要再引用
    //    implementation rootProject.ext.third["arouter_api"]
        implementation project(':common')
    //    annotationProcessor rootProject.ext.third["arouter_compiler"]
        kapt rootProject.ext.third["arouter_compiler"]
       ……………………
        kapt "com.android.databinding:compiler:3.1.0"
    }
    
    kapt {
        generateStubs = true
    }
    
    repositories {
        mavenCentral()
    }
    
    

    这里需要弄清楚kapt与annotationProcessor区别可以查看KAPT(Annotation Processing for Kotlin)是什么

    问题三,ViewModelProviders提示找不到

    google新推出MVVM+Android Architecture Components,优势在于不用管理Activity与Fragment的生命周期,当数据更新时候会自动通知到ui上,当然它这个实现还是基于观察者模式的,订阅-发布过程。作为一名优(懒)秀(惰)程序员当然要引入自己项目中啦。

    1. gradle的配置信息
    apply plugin: 'com.android.library'
    apply plugin: 'kotlin-android'
    apply plugin: 'kotlin-kapt'
    android {
        …………………………
        }
        buildTypes {
           ………………
        }
        dataBinding {
            enabled true
        }
    }
    
    dependencies {
        ……………………
        //liveData 如果有kotlin代码,annotationProcessor必须用kapt代替,要不功能无法正常使用m
        implementation rootProject.ext.support["lifecycle"]
        annotationProcessor rootProject.ext.support["lifecycle_compile"]
        implementation rootProject.ext.support["room"]
        annotationProcessor rootProject.ext.support["room_compile"]
        ……………………
    }
    kapt {
        generateStubs = true
    }
    repositories {
        mavenCentral()
    }
    
    

    问题来了,javaUI跳转到Kotlin写的UI上App闪退,项目报错信息:Failed resolution of: Landroid/arch/lifecycle/ViewModelProviders,google了很多方法之后都没用,突然想到ARouter的解决方法,有点共同性,灵机一动,我就把上面的annotationProcessor替换成了kapt,然后项目就成功运行了。真是机(傻)智(逼)如(shi)我(wo)。其实核心问题就是没弄懂annotationProcessor的作用。想学习如何使用Android Architecture Components的童鞋可以去github的官方demo学习,链接如下android-lifecycles

    希望能帮到大家增加对android的热爱,fighting……

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