Android 컴파일gradle 동적 수정 버전 번호

import com.google.gson.Gson

class Version {
    int versionCode
    String versionName
}


def versionJsonFile = file('./version.json')//                       
    def versionJsonObject = new Gson().fromJson(versionJsonFile.text, Version.class)
    android.applicationVariants.all {
        variant ->
            println("variants name : " + variant.name)
			//                   ，               
            if (variant.name.toLowerCase().contains("ceshirelease") ) {
                println("variants name : versionCode " +  versionJsonObject.versionCode + "versionname: " + versionJsonObject.versionName)
                versionJsonObject.versionCode = versionJsonObject.versionCode + 1
                int lastIndexPoint = versionJsonObject.versionName.lastIndexOf(".")
                String newStr = versionJsonObject.versionName.substring(0, lastIndexPoint)
                println("newStr" +  newStr)
                versionJsonObject.versionName = newStr + "." + versionJsonObject.versionCode
                println("versonJsonStr.versionName " +   versionJsonObject.versionName)
            }
			//     ，           ，         BuildConfig.class     
            variant.mergedFlavor.versionCode = versionJsonObject.versionCode
            variant.mergedFlavor.versionName = versionJsonObject.versionName
			//         ，                     ，     
            variant.mergedFlavor.manifestPlaceholders.put("versioncode", versionJsonObject.versionCode)
            variant.mergedFlavor.manifestPlaceholders.put("versionname", versionJsonObject.versionName)
    }
	
	//          ，           ，          
	//         apk                     
	   afterEvaluate {
        project ->
            gradle.taskGraph.afterTask {
                task, taskState ->
				   //    assembleceshirelease            ，         ，     
                    if (task.name.toLowerCase().contains("assembleceshirelease") && taskState.getFailure() == null) {
                        println("try assemble ceshi release" )
						//      
                        versionJsonFile.withPrintWriter { out ->
                                out.println(new Gson().toJson(versionJsonObject))
                        }
                    }
            }
    }
	

           variant.getOutputs().all {
               File file = it.outputFile;
               println(" file property  file.canRead() " + file.canRead() + " file.canWrite " + file.canWrite())
               String pathString = file.getPath();
               println(" path String : " + pathString + " File.pathSeparator: " + File.separator)
			   //               
               pathString = file.getParent() + File.separator +  "test.apk";
               println(" path pathString : " + pathString)
               file.renameTo(pathString)
           }