RePlugin 插件共享宿主的Retrofit實(shí)例

最近在學(xué)習(xí)使用RePlugin,在考慮代碼分層時,基本的網(wǎng)絡(luò)請求要怎么共享,不管是宿主還是插件,對應(yīng)的Retrofit實(shí)例和OKHTTP實(shí)例應(yīng)該只有一個才對,如果每個app中一個單獨(dú)的實(shí)例是可行,但是占用資源。

使用共享lib的方式來實(shí)現(xiàn)

網(wǎng)絡(luò)層comm_net: 通過Retrofit2+Rxjava2+Dagger2來實(shí)現(xiàn)

HttpResult:數(shù)據(jù)返回的通用數(shù)據(jù)結(jié)構(gòu)定義

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實(shí)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的定義。由于rxandroid只有app模塊中才會用,就不在基礎(chǔ)的網(wǎng)絡(luò)層去提供了,沒價值而且會有依賴沖突

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,讓依賴這個lib的項(xiàng)目可見
  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,讓依賴這個lib的項(xiàng)目可見
}

當(dāng)依賴了這些項(xiàng)目的時候,他們之前的依賴關(guān)系如下:

image.png

app(宿主)和plugina(插件)通過同樣的接口請求

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;
  }

兩者的不同在各自的application和build中:

app的定義:

  • 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);
    }
//省略部分無關(guān)代碼
}
  • 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的定義:

  • MyApplication

這里面通過反射拿到app的MyApplication對象的createNetService方法,并通過他在插件中創(chuàng)建定義的請求接口。

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;
    //獲取宿主的context,指向app的MyApplication對象
    Context hostContext = RePlugin.getHostContext();
    Class<? extends Context> aClass = hostContext.getClass();
    try {
      //反射拿到app中MyApplication對象的createNetService方法
      createNetService = aClass.getDeclaredMethod("createNetService", Class.class);
    } catch (NoSuchMethodException e) {
      e.printStackTrace();
    }

  }

  //返回Retrofit的接口對象
  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;
  }
  
  //省略部分無關(guān)代碼
  }
  • 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'
  }

編譯運(yùn)行后,ap中請求ok,但是插件中直接崩潰了,報(bào)錯如下:

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轉(zhuǎn)換Observable時失敗了,找不匹配的轉(zhuǎn)換器。

明明存在為啥找不到,懷疑是依賴class找不到

斷點(diǎn)調(diào)試查看版本和路徑

  • APP中的信息
image.png
  • plugina中的信息


    image.png

returnType 的 io.reactivex.Observable 路徑是不一樣的。

所以需要移除插件里面的Observable,讓它去吸附宿主里面的路徑。

  • 于是調(diào)整 plugina的build,移除相關(guān)依賴

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')
}
//相當(dāng)于compileOnly
android.applicationVariants.all { variant ->
    //移除從comm_net中來的retrofit2
  variant.getRuntimeConfiguration().exclude group: 'com.squareup.retrofit2'
  //移除從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包提取出來,才能用。而且移除了Rxjava和Retrofit的依賴。

  • 同時要記得去app的MyApplication中去開啟setUseHostClassIfNotFound(true),否則plugina中會找不到Retrofit和RxJava
image.png

或許你會納悶為啥要把rxandroid抽成jar,并compileOnly,而不能直接implementation,然后單獨(dú)移除Rxjava勒? 下面有圖為證

image.png

編譯會報(bào)錯,提示不能把rxandroid作為僅編譯時使用,記得上面的那個依賴圖么,rxandroid依賴了Rxjava,現(xiàn)在釜底抽薪了,然后有要編譯打包rxandroid,風(fēng)險(xiǎn)太高,系統(tǒng)自然不干。

看似簡簡單的幾行代碼,折騰了我一周的時間去各種驗(yàn)證和調(diào)整寫法,心塞塞的。

在編譯app是指定同時要編譯的plugin插件,方便團(tuán)隊(duì)成員快速調(diào)試驗(yàn)證自己開發(fā)的插件,可以在app的build中添加如下的腳本


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${buildType.name.capitalize()}Build")
            //assemble 前,先卸載對應(yīng)版本,防止Replugin 插件的改動不更新
            tasks.getByPath(":${project.name}:assemble${buildType.name.capitalize()}").dependsOn "uninstall${buildType.name.capitalize()}"
            preAssemble.dependsOn subAssemble
        }
    }
}

moduleName指定了一個參與編譯的插件數(shù)組,在準(zhǔn)備好的時候,會將app的 preXX編譯依賴到插件的assembleXX任務(wù)上,同時插件的assembleXX會在編譯完后,將自己拷貝到app的assert目錄下,并重命名。同時在app的 assembleXX編譯前,先從手機(jī)上卸載掉老版本,防止Replugin的插件不更新。

后續(xù)完善

  1. 優(yōu)化上面的編譯腳本,多個插件可以方便的指定編譯一個
  2. 將comm_net封裝成單獨(dú)的插件,供app和plugina使用。
  3. 插件在編譯的時候,Replugin插件會自動uzip依賴的的各種lib,編譯相當(dāng)?shù)穆@里可以把插件中共用的無關(guān)的lib全部移除掉,反正宿主會提供,比如support包
  4. 插件作用獨(dú)立app編譯與作為插件時的dependence動態(tài)適應(yīng),不用手動去改
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