android - 网上下载了的 RecyclerView.jar , 复制到工程 libs目录下，右键添加到工程。。。

Answer 1

Android Studio just needs to add a sentence in gradle

compile com.android.support:recyclerview- v7:23.0.1

Then just sync it.

Answer 2

It is included in the Android SDK, no need to import the jar package.
Add a sentence directly to build.gradle under this module

compile com.android.support:recyclerview- v7:23.0.1

Then just synchronize Gradle.

In addition, there is no need to add it manually after placing the jar package in the lib directory of Android Studio. Gradle will automatically add it because there is this sentence in Gradle:

compile fileTree(include: ['*.jar'], dir: 'libs')