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Error:Execution failed for task ‘:app:compileDebugJavaWithJavac’.

Error:Execution failed for task ‘:app:compileDebugJavaWithJavac’.
> java.lang.UnsupportedOperationException: cannot unbox java.lang.String


This error message I have got many times after I created a new Table in DBFlow.

That is because using a String as a auto increment Primary Key.

@Unique(onUniqueConflict = ConflictAction.REPLACE)
@PrimaryKey(autoincrement = true)
public int id;

One response to “Error:Execution failed for task ‘:app:compileDebugJavaWithJavac’.

  1. YMHuang (@ymhuang0808) 2016/07/24 at 11:50 am

    Thanks, it is helpful for me.

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