android studio每次新建项目都默认采用api23来编译，想改成19，直接在gradle里面单改编译版本会报错。想问一下怎么可以改默认的编译版本，以及studio不让选择编译版本的原因。
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What error are you reporting? Please check whether you have downloaded the development package for API 19.
Also, wouldn’t it be bad to compile with a newer version?
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What error are you reporting? Please check whether you have downloaded the development package for API 19.
Also, wouldn’t it be bad to compile with a newer version?