xml文件: main1: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" and…

Toast吐司: Toast内容简单,不做过多介绍,Toast支持自带简单吐司,自定义吐司.内容简单可见代码,详见API.A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. Fo…