RePlugin 插件共享宿主的Retrofit实例
最近在学习使用RePlugin,在考虑代码分层时,基本的网络请求要怎么共享,不管是宿主还是插件,对应的Retrofit实例和OKHTTP实例应该只有一个才对,如果每个app中一个单独的实例是可行,但是占用资源。
使用共享lib的方式来实现
网络层comm_net: 通过Retrofit2+Rxjava2+Dagger2来实现
HttpResult:数据返回的通用数据结构定义
package com.lehow.comm.net;
public class HttpResult<T> {
public int code;
public String msg;
public T data;
public Boolean error;
public String token;
public int userId;
@Override
public String toString() {
return "BaseBean{" +
"code=" + code +
", message='" + msg + '\'' +
", data=" + data +
", error=" + error +
", token=" + token +
", userId=" + userId +
'}';
}
}
NetModule:提供Retrofit实例
@Module
public class NetModule {
private String API_HOST_URL;
public NetModule(String API_HOST_URL) {
this.API_HOST_URL = API_HOST_URL;
}
@Provides @Singleton public Retrofit provideRetrofit() {
Retrofit.Builder builder = new Retrofit.Builder().baseUrl(API_HOST_URL)
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJava2CallAdapterFactory.create());
return builder
.build();
}
}
NetComponent:暴露DI接口
@Singleton
@Component(modules = NetModule.class)
public interface NetComponent {
Retrofit getRetrofitInstance();
}
build文件,主要看dependencies的定义。由于rxandroid只有app模块中才会用,就不在基础的网络层去提供了,没价值而且会有依赖冲突
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.google.dagger:dagger:2.12'
annotationProcessor 'com.google.dagger:dagger-compiler:2.12'
api 'com.squareup.retrofit2:retrofit:2.3.0'//暴露api,让依赖这个lib的项目可见
implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
// api 'io.reactivex.rxjava2:rxandroid:2.0.1'
api 'io.reactivex.rxjava2:rxjava:2.1.6'//指定RxJava的版本,并暴露api,让依赖这个lib的项目可见
}
当依赖了这些项目的时候,他们之前的依赖关系如下:
image.pngapp(宿主)和plugina(插件)通过同样的接口请求
public interface NetApiService {
@GET("test/top-article") Observable<HttpResult<ArrayList<TopArticle>>> getTopArticle(
@Query("publishTime") String publishTime, @Query("moveType") int moveType,
@Query("limit") int limit);
}
public class TopArticle {
public int id;
public String title;
public String publishTime;
public String backGroundPic;
public int readNum;
public String shortContent;
public String url;
public String logo;
public int concernNum;
public String realName;
public boolean isCollect;
}
两者的不同在各自的application和build中:
app的定义:
- MyApplication,注意其中的createNetService方法
public class MyApplication extends RePluginApplication {
private static final String TAG =MyApplication.class.getSimpleName() ;
public static MyApplication instance;
private Retrofit retrofitInstance;
@Override public void onCreate() {
super.onCreate();
instance = this;
retrofitInstance = DaggerNetComponent.builder()
.netModule(new NetModule("http://192.168.10.224:7080/"))
.build()
.getRetrofitInstance();
}
public <T> T createNetService(final Class<T> service) {
Log.i(TAG, "createNetService: retrofitInstance="+retrofitInstance);
return retrofitInstance.create(service);
}
//省略部分无关代码
}
- build的dependencies
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile('com.android.support:appcompat-v7:26.+', {
exclude group: 'com.android.support', module: 'v4'
})
compile 'com.qihoo360.replugin:replugin-host-lib:2.2.1'
testCompile 'junit:junit:4.12'
implementation project(':comm_net')
implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
}
plugina的定义:
- MyApplication
这里面通过反射拿到app的MyApplication对象的createNetService方法,并通过他在插件中创建定义的请求接口。
public class MyApplication extends Application {
private static final String TAG ="MyApplication" ;
public static MyApplication instance;
private Method createNetService;
@Override protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
}
@Override public void onCreate() {
super.onCreate();
instance = this;
//获取宿主的context,指向app的MyApplication对象
Context hostContext = RePlugin.getHostContext();
Class<? extends Context> aClass = hostContext.getClass();
try {
//反射拿到app中MyApplication对象的createNetService方法
createNetService = aClass.getDeclaredMethod("createNetService", Class.class);
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
}
//返回Retrofit的接口对象
public <T> T createNetService(final Class<T> service) {
if (createNetService != null) {
try {
return (T) createNetService.invoke(RePlugin.getHostContext(), service);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
return null;
}
//省略部分无关代码
}
- build的dependencies
dependencies {
implementation 'com.qihoo360.replugin:replugin-plugin-lib:2.2.1'
testImplementation 'junit:junit:4.12'
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation project(':comm_net')
implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
}
编译运行后,ap中请求ok,但是插件中直接崩溃了,报错如下:
Caused by: java.lang.IllegalArgumentException: Unable to create call adapter for io.reactivex.Observable<com.lehow.comm.net.HttpResult<java.util.ArrayList<com.lehow.plugina.net.TopArticle>>>
for method NetApiService.getTopArticle
at retrofit2.ServiceMethod$Builder.methodError(ServiceMethod.java:752)
at retrofit2.ServiceMethod$Builder.createCallAdapter(ServiceMethod.java:237)
at retrofit2.ServiceMethod$Builder.build(ServiceMethod.java:162)
at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:170)
at retrofit2.Retrofit$1.invoke(Retrofit.java:147)
at java.lang.reflect.Proxy.invoke(Proxy.java:393)
at $Proxy0.getTopArticle(Unknown Source)
at com.lehow.plugina.MainActivity.btnGetTop(MainActivity.java:68)
... 11 more
Caused by: java.lang.IllegalArgumentException: Could not locate call adapter for io.reactivex.Observable<com.lehow.comm.net.HttpResult<java.util.ArrayList<com.lehow.plugina.net.TopArticle>>>.
Tried:
* retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory
* retrofit2.ExecutorCallAdapterFactory
at retrofit2.Retrofit.nextCallAdapter(Retrofit.java:241)
at retrofit2.Retrofit.callAdapter(Retrofit.java:205)
at retrofit2.ServiceMethod$Builder.createCallAdapter(ServiceMethod.java:235)
... 17 more
Retrofit在使用RxJava2CallAdapterFactory转换Observable时失败了,找不匹配的转换器。
明明存在为啥找不到,怀疑是依赖class找不到
断点调试查看版本和路径
- APP中的信息
-
plugina中的信息
image.png
returnType 的 io.reactivex.Observable 路径是不一样的。
所以需要移除插件里面的Observable,让它去吸附宿主里面的路径。
- 于是调整 plugina的build,移除相关依赖
dependencies {
implementation 'com.qihoo360.replugin:replugin-plugin-lib:2.2.1'
// implementation fileTree(include: ['*.jar'], dir: 'libs')
testImplementation 'junit:junit:4.12'
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation project(':comm_net')
// implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
compileOnly files('libs/rxandroid-2.0.1.jar')
// implementation files('libs/retrofit-2.3.0.jar')
}
//相当于compileOnly
android.applicationVariants.all { variant ->
//移除从comm_net中来的retrofit2
variant.getRuntimeConfiguration().exclude group: 'com.squareup.retrofit2'
//移除从comm_net中的rxjava2
variant.getRuntimeConfiguration().exclude group: 'io.reactivex.rxjava2'
}
注意compileOnly只能用在jar上,所以要把rxandroid.aar中的jar包提取出来,才能用。而且移除了Rxjava和Retrofit的依赖。
- 同时要记得去app的MyApplication中去开启setUseHostClassIfNotFound(true),否则plugina中会找不到Retrofit和RxJava
或许你会纳闷为啥要把rxandroid抽成jar,并compileOnly,而不能直接implementation,然后单独移除Rxjava勒? 下面有图为证
image.png编译会报错,提示不能把rxandroid作为仅编译时使用,记得上面的那个依赖图么,rxandroid依赖了Rxjava,现在釜底抽薪了,然后有要编译打包rxandroid,风险太高,系统自然不干。
看似简简单的几行代码,折腾了我一周的时间去各种验证和调整写法,心塞塞的。
在编译app是指定同时要编译的plugin插件,方便团队成员快速调试验证自己开发的插件,可以在app的build中添加如下的脚本
def moduleName=[':plugina']
afterEvaluate {
android.buildTypes.all{ buildType ->
println 'buildType='+buildType
println 'buildType capitalize='+buildType.name.capitalize()
moduleName.each {curMName->
println 'TTT='+"${curMName}:assemble${buildType.name.capitalize()}"
curMName=curMName.replace(':','')
def subAssemble=rootProject.project(curMName).tasks.
getByPath(":$curMName:assemble${buildType.name.capitalize()}")
subAssemble.doLast {
println '==doLast=='
copy{
from "../$curMName/build/outputs/apk/$buildType.name/$curMName-${buildType.name}.apk"
into "/src/main/assets/plugins/"
rename("$curMName-${buildType.name}.apk","${curMName}.jar")
}
}
def preAssemble=tasks.getByPath(":${project.name}:pre${buildType.name.capitalize()}Build")
//assemble 前,先卸载对应版本,防止Replugin 插件的改动不更新
tasks.getByPath(":${project.name}:assemble${buildType.name.capitalize()}").dependsOn "uninstall${buildType.name.capitalize()}"
preAssemble.dependsOn subAssemble
}
}
}
moduleName指定了一个参与编译的插件数组,在准备好的时候,会将app的 preXX编译依赖到插件的assembleXX任务上,同时插件的assembleXX会在编译完后,将自己拷贝到app的assert目录下,并重命名。同时在app的 assembleXX编译前,先从手机上卸载掉老版本,防止Replugin的插件不更新。
后续完善
- 优化上面的编译脚本,多个插件可以方便的指定编译一个
- 将comm_net封装成单独的插件,供app和plugina使用。
- 插件在编译的时候,Replugin插件会自动uzip依赖的的各种lib,编译相当的慢,这里可以把插件中共用的无关的lib全部移除掉,反正宿主会提供,比如support包
- 插件作用独立app编译与作为插件时的dependence动态适应,不用手动去改