use kotlin file in java

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.1.3-2'
+    ext.kotlin_version = '1.2.21'
     repositories {
         jcenter()
         maven { url "https://jitpack.io" }

readercomponent/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.dd.comgradle'
+apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion 26
@@ -43,9 +44,13 @@ dependencies {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
     testCompile 'junit:junit:4.12'
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
 }
 
 combuild {
     applicationName = 'com.luojilab.reader.runalone.application.ReaderApplication'
     isRegisterCompoAuto = false
+}
+repositories {
+    mavenCentral()
 }

readercomponent/src/main/java/com/luojilab/reader/applike/ReaderAppLike.java

@@ -4,7 +4,7 @@
 import com.luojilab.component.componentlib.router.Router;
 import com.luojilab.component.componentlib.router.ui.UIRouter;
 import com.luojilab.componentservice.readerbook.ReadBookService;
-import com.luojilab.reader.serviceimpl.ReadBookServiceImpl;
+import com.luojilab.reader.serviceimpl.ReadBookServiceImplKotlin;
 
 /**
  * Created by mrzhang on 2017/6/15.
@@ -18,7 +18,8 @@ public class ReaderAppLike implements IApplicationLike {
     @Override
     public void onCreate() {
         uiRouter.registerUI("reader");
-        router.addService(ReadBookService.class.getSimpleName(), new ReadBookServiceImpl());
+//        router.addService(ReadBookService.class.getSimpleName(), new ReadBookServiceImpl());
+        router.addService(ReadBookService.class.getSimpleName(), new ReadBookServiceImplKotlin());
     }
 
     @Override

readercomponent/src/main/java/com/luojilab/reader/serviceimpl/ReadBookServiceImplKotlin.kt

@@ -0,0 +1,14 @@
+package com.luojilab.reader.serviceimpl
+
+import android.support.v4.app.Fragment
+import com.luojilab.componentservice.readerbook.ReadBookService
+import com.luojilab.reader.ReaderFragment
+
+/**
+ * Created by mrzhang on 2018/2/9.
+ */
+class ReadBookServiceImplKotlin : ReadBookService {
+    override fun getReadBookFragment(): Fragment {
+        return ReaderFragment()
+    }
+}