如何以编程方式更改ListView内的TextView的背景颜色? [英] How do you change the background color of a TextView that is inside a ListView Programmatically?

问题描述

我有一个包含多个TextView项的ListView.该列表是在运行时创建的，大小可能有所不同.我想基于运行时生成的浮点值设置TextView项目的背景.我正在使用ArrayAdapter.

I have a ListView that contains several TextView items. This list is created at runtime, and can vary in size. I would like to set the background of a TextView item based on a float value generated at runtime. I am using an ArrayAdapter.

setListAdapter(new ArrayAdapter<String>(this, R.layout.list_fruit,ratios));  
final ListView listView = getListView();
listView.setTextFilterEnabled(true);
listView.setBackgroundColor(Color.LTGRAY);
((TextView) listView.getChildAt(0)).setBackgroundColor(Color.CYAN);

最后一行抛出NullPointerException.由于某些原因，我无法在listView中访问此TextView.如果我不知道运行时的颜色，应该如何动态设置TextView的背景颜色?

The last line throws a NullPointerException. For some reason I cannot access this TextView inside the listView. How am I supposed to set the background color of a TextView dynamically if I don't know the color until runtime?

推荐答案

只需创建自定义适配器.

Simply you have create custom Adapter.

引用此链接，

如何在ListView上更改颜色和字体

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