我我剛開始學習Android開發總初學者,我試圖打印的「Hello World」的「淺色主題」,但我有這個問題的Android - 以下類不能被實例化
the following classes could not be instantiated
- android.support.design.widget.coordinatorLayout
- android.support.design.widget.AppBarLayout
- android.support.design.widget.FloatingActionButton
將材質燈光主題更改爲NoActionBar主題 –