個(gè)人項(xiàng)目的整體結(jié)構(gòu)
project.png
推薦依賴(lài)API的做法
- 我私人創(chuàng)建多模塊開(kāi)發(fā)四瘫，所以模塊之前添加依賴(lài)會(huì)導(dǎo)致version五花八門(mén)，這個(gè)建議在根目錄下創(chuàng)建dependencies.gradle,用于對(duì)依賴(lài)統(tǒng)一進(jìn)行管理欲逃，代碼如下(new file時(shí)候把后綴名輸入就可以粗暴創(chuàng)建gradle文件了)
ext {
//true 每個(gè)業(yè)務(wù)Module可以單獨(dú)開(kāi)發(fā)
//false 每個(gè)業(yè)務(wù)Module以lib的方式運(yùn)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:$butterknifeVersion",
]
}
- 新建完gradle文件后找蜜，必須要與項(xiàng)目root 關(guān)聯(lián)起來(lái)，要不引用時(shí)候會(huì)報(bào)錯(cuò)的稳析。引用方法：找到project下的gradle锹杈，用apply from加入對(duì)dependencies.gradle的依賴(lài)。
apply from:"dependencies.gradle"
buildscript {
ext.kotlin_version = '1.2.71'
repositories {
maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/' }
maven{ url 'https://maven.aliyun.com/repository/google' }
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$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
}
問(wèn)題場(chǎng)景
原本java的項(xiàng)目引入Kotlin作為開(kāi)發(fā)語(yǔ)言迈着，在模塊還沒(méi)引用kotlin之前是采用databinding和ARouter進(jìn)行ui綁定和模塊界面跳轉(zhuǎn)的竭望，但是引入Kotlin后出現(xiàn)問(wèn)題1:databinding沖突；問(wèn)題2:ARouter提示跳轉(zhuǎn)路徑找不到裕菠；問(wèn)題3:Android Architecture Components提示找不到ViewModelProviders
解決辦法
問(wèn)題一咬清，與databinding沖突解決方法
在自己的模塊的gradle文件進(jìn)行配置，我是在module_main模塊中引入Kotlin進(jìn)行開(kāi)發(fā)的奴潘，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()
}
問(wèn)題二旧烧，ARouter提示找不到跳轉(zhuǎn)路徑的解決辦法
這個(gè)僅使用與你項(xiàng)目本來(lái)是可以用ARouter來(lái)進(jìn)行跳轉(zhuǎn)的，在跳轉(zhuǎn)到Kotlin的Activity時(shí)候提示找不到路徑的場(chǎng)景画髓。
- 原本模塊在純java模塊下的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是依賴(lài)與dependencies.gradle定義的屬性
minSdkVersion rootProject.ext.minSdkVersion
targetSdkVersion rootProject.ext.targetSdkVersion
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
//Arouter路由配置（每個(gè)Module都需要添加掘剪，要不然無(wú)法跳轉(zhuǎn)）
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?yàn)閏ommon模塊(通用模塊)引用了arouter_api奈虾，所以該模塊不需要再引用夺谁，這里要自己區(qū)分api與implementation
// implementation rootProject.ext.third["arouter_api"]
implementation project(':common')
annotationProcessor rootProject.ext.third["arouter_compiler"]
}
- 模塊添加Kotlin代碼后，在沒(méi)有修改gradle配置信息情況下肉微，導(dǎo)致ARouter提示找不到相關(guān)的UI的路徑匾鸥。原因是因?yàn)镵otlin的插件與Java不同，Java不支持Kotlin的代碼碉纳，但是Kotlin的插件卻完美支持Kotlin與Java代碼勿负。下面我們需要修改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（每個(gè)Module都需要添加，要不然無(wú)法跳轉(zhuǎn)）
// javaCompileOptions {
// annotationProcessorOptions {
// arguments = [ moduleName : project.getName() ]
// }
// annotationProcessorOptions {
// arguments = [AROUTER_MODULE_NAME: project.getName()]
// }
// }
//如果存在kotlin和java代碼必須配置下面的代碼
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路由劳曹，因?yàn)閏ommon模塊引用了arouter_api奴愉，所以該模塊不需要再引用
// 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()
}
這里需要弄清楚kapt與annotationProcessor區(qū)別可以查看KAPT(Annotation Processing for Kotlin)是什么
問(wèn)題三琅摩，ViewModelProviders提示找不到
google新推出MVVM+Android Architecture Components，優(yōu)勢(shì)在于不用管理Activity與Fragment的生命周期锭硼，當(dāng)數(shù)據(jù)更新時(shí)候會(huì)自動(dòng)通知到ui上房资，當(dāng)然它這個(gè)實(shí)現(xiàn)還是基于觀(guān)察者模式的，訂閱-發(fā)布過(guò)程账忘。作為一名優(yōu)（懶）秀（惰）程序員當(dāng)然要引入自己項(xiàng)目中啦志膀。
- 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代碼熙宇，annotationProcessor必須用kapt代替鳖擒，要不功能無(wú)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()
}
問(wèn)題來(lái)了，javaUI跳轉(zhuǎn)到Kotlin寫(xiě)的UI上App閃退烫止，項(xiàng)目報(bào)錯(cuò)信息：Failed resolution of: Landroid/arch/lifecycle/ViewModelProviders蒋荚，google了很多方法之后都沒(méi)用，突然想到ARouter的解決方法馆蠕，有點(diǎn)共同性期升，靈機(jī)一動(dòng)，我就把上面的annotationProcessor替換成了kapt互躬，然后項(xiàng)目就成功運(yùn)行了播赁。真是機(jī)（傻）智（逼）如（shi）我（wo）。其實(shí)核心問(wèn)題就是沒(méi)弄懂a(chǎn)nnotationProcessor的作用吼渡。想學(xué)習(xí)如何使用Android Architecture Components的童鞋可以去github的官方demo學(xué)習(xí)容为，鏈接如下android-lifecycles
希望能幫到大家增加對(duì)android的熱愛(ài)，fighting……
