Android Studio 如何引入jar包？

1.首先把需要用的jar包拷贝到app/libs目录下，比如拷入 picasso-2.3.4.jar

2.在app/build.gradle做如下操作

//在dependencies添加如下信息，然后编译即可

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    // You must install or update the Support Repository through the SDK manager to use this dependency.
    compile files('libs/picasso-2.3.4.jar')
}