today, I want to learn the version of Android L Material Design required is Android 5.0, so I chose 5.1 Lolipop

when building the project in Android Studio
Failure [INSTALL_FAILED_OLDER_SDK]

error obviously, the SDK version is too old.

solution:

modify the minSdkVersion number in build. Gradble

defaultConfig {
    applicationId "com.example.mooreliu.androidl"
    minSdkVersion 13
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}