报错：This support library should not use a different version (24) than the compileSdkVersion (28) less... (Ctrl+F1)
There are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion). Issue id: GradleCompatibl
出现原因：在学习《第一行代码》中的RecycleView时，往build.gradle中添加依赖库的时候出现错误，添加内容是
compile'com.android.support:recyclerview-v7:24.2.1'
其实翻译下报错英文猜测是因为我的SDK版本已经到28了，不能用低版本的依赖库，所以改成和我版本相同的就解决了
implementation 'com.android.support:recyclerview-v7:28.0.0-alpha1'
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