找不到属性jni和源集“main”applyplugin:'com.android.model.application'model{android{compileSdkVersion=21buildToolsVersion="22.0.1"defaultConfig.with{applicationId="com.example.native_activity"minSdkVersion.apiLevel=9targetSdkVersion.apiLevel=9}sourceSets.main{jni.srcDirs=[]//Thispreventstheautogenerationo