title: Device Android API
body: <p>So my device Lenovo is runnig Android Kit kat 4.4.2 API 19 and i want to debug an aplication from Android Studio with target API 22, my goal is to use Material Design, whetever when i run the aplication give me an eror.
  When y set the theme android:Theme.Material, it tell me that it requires minSdkTarget API 21, i set minSdkTarget = 19, when i set it to 21 and run it give's me the error 
  pkg: /data/local/tmp/com.example.andrei.desingpattern
  Failure [INSTALL_FAILED_OLDER_SDK]</p>
  
  <p>Should my device have API 21 instaled ? </p>