android异常Call requires API level 16 (current min is 15): android.view.View#setBackground
参考https://blog.****.net/bigtree_mfc/article/details/70843698
Call requires API level 16 (current min is 15): android.view.View#setBackground
意思是build.gradle中的minSdkVersion就可以了
如下图将 15改成16后 页面顶部有一行提示,点击最右边Sync_now即可