异常：java.lang.NullPointerException: Parameter specified as non-null is null:

异常：

java.lang.NullPointerException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkNotNullParameter, parameter share_media
        at com.ocsyun.read.utils.ShareSdkUtil$ShareCustListener.onclick(Unknown Source:7)
        at com.umeng.socialize.shareboard.ShareBoard$3.onclick(ShareBoard.java:113)
        at com.umeng.socialize.shareboard.ShareBoardMenuHelper$1.onClick(ShareBoardMenuHelper.java:188)
        at android.view.View.performClick(View.java:6436)
        at android.view.View$PerformClick.run(View.java:25390)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:167)
        at android.app.ActivityThread.main(ActivityThread.java:7146)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:820)

原因：字段为null 但实体类有默认值

var share_media: SHARE_MEDIA = ""

解决办法：

var share_media: SHARE_MEDIA?