zoukankan      html  css  js  c++  java
  • xml中使用android:onClick

    From android 1.6 adds a new feature for the declaration of the “on-click” listener for a Button. In addition to the classic approach of defining some object (such as the activity) as implementing the    View.OnClickListener interface, you can now take a somewhat simpler approach:

    • Define some method on your Activity that holds the button that takes a single View parameter, has a void return value, and is public.
    • In your layout XML, on the Button element, include the  android:onClick attribute with the name of the method you defined in  the previous step.

    For example,  we might have a method on our Activity that looks like:

    Java代码
    Java代码
    1. public void updateTime(View view){
    2. ((Button)view).setText(“android:onClick attributes”);
    3. }

    Then , we could use this XML declaration for the Button itself, including android:onClick

    Xml代码
    1. <Button android:layout_width=”fill_parent”
    2. android:layout_height=”fill_parent” android:id=”@+id/button”
    3. android:onClick=”updateTime”></Button>

    OK, now we can run the code , click the button and we get the new text for the button.

  • 相关阅读:
    规范的html页面
    什么是MVC (模型 视图 控制器)?
    MVC概念
    MVC实用集锦(1)
    三层架构与MVC的区别
    spring-data-jpa的简单介绍
    Spring和SpringMVC的区别
    Spring常用注解汇总
    jmeter---CSV文件设置操作
    Linux----软件包管理
  • 原文地址:https://www.cnblogs.com/redspider110/p/2461429.html
Copyright © 2011-2022 走看看