添加在运行时键可在各行中的列表视图 [英] Adding buttons at run time to each row in a list view

问题描述

我在使用列表视图Android应用程序的工作。我现在有是只有一个文本视图的行布局的XML。在一定条件下，某些行将具有一个附加键和其他一些行可以具有2个额外的按钮。我可以覆盖适配器类的getView方法来完成这个逻辑？是否有任何性能问题？

I am working in an android application that uses a list view. I currently have a XML for the row layout with only one text view. Based on certain conditions, some rows will have one additional button and some other rows may have 2 additional buttons. Can I override the getView method of the adapter class to do this logic? is there any performance issue?

推荐答案

有一排布局与2个按钮，则：

Have a row layout with 2 buttons, then:

public View getView(int position, View convertView, ViewGroup parent){
    // the usual convertView stuff
    if(convertView == null){
        convertView = layoutInflater.inflate(//TODO);
        Tag tag = new Tag();
        convertView.setTag(tag);
        tag.button1 = (Button)convertView.findViewById(R.id.btn1);
        tag.button2 = (Button)convertView.findViewById(R.id.btn2);
    }
    Tag tag = (Tag)convertView.getTag();
    boolean buttonOneShown = //TODO;
    boolean buttonTwoShown = //TODO;
    tag.button1.setVisibility(buttonOneShown ? VISIBLE : GONE);
    tag.button1.setVisibility(buttonTwoShown ? VISIBLE : GONE);
}

表现会就好了。

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