android異常Call requires API level 16 (current min is 15): android.view.View#setBackground

參考https://blog.csdn.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 如下圖將 15改成16後 頁面頂部有一行提示，

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