ArrayAdapter的getView()方法如何工作?

问题描述

我想做一个ArrayAdapter以显示图像和文本.如果可能的话，我不要例子.我希望有人向我解释getView()的工作方式.

I want to do an ArrayAdapter to display an image and text. I don't want examples if possible. I'd like someone to explain me how getView() works.

谢谢.

推荐答案

getView()是适配器的主要部分.它返回View，它将显示为您的列表/网格/库/使用适配器项的任何视图.滚动视图(例如列表)时触发.

getView() is the main part of your adapter. It returns View that will be displayed as your list/grid/gallary/any view that use adapter item. It triggers when you scroll the view(list for example).

因此，您应该做的第一件事就是创建自定义适配器.您可以从BaseAdapter扩展它.然后，您需要创建一些数据以显示(或将其从外部传递到适配器-这是更好的解决方案).

So the first thing you should do its to create your custom adapter. You may extend it from BaseAdapter. Then you need to create some data to display (or pass it to adapter from out side - its better solution).

在此之后，重写getView()方法，并确保在此处返回自定义视图.在您的情况下，它应该是带有ImageView和TextView的Layout(并且不要忘记填写它们).

After that override getView() method and make sure to return your custom View there. In your case it should be a Layout with ImageView and TextView (and dont forget to fill them).

您可以从中了解更多信息:

You can learn more from :

• http://www.youtube.com/watch?v=N6YdwzAvwOA
• http://www.edureka.in/blog/what-are-adapters-在Android/
• http://lucasr.org/2012/04/05/performance- tips-for-androids-listview/

• http://www.youtube.com/watch?v=N6YdwzAvwOA
• http://www.edureka.in/blog/what-are-adapters-in-android/
• http://lucasr.org/2012/04/05/performance-tips-for-androids-listview/

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