从 ListAdapter 编辑 TextView？

发布于 2024-12-09 16:39:16 字数 656 浏览 0 评论 0原文

我有一个 ListView，它由 ArrayAdapter 支持。它们的定义如下：

ListView listView = (ListView)findViewById(R.id.listview);
ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(this, R.layout.list_item);
listView.setAdapter(listAdapter);

list_item.xml 包含以下内容：

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    android:textSize="16sp">
</TextView>

将项目添加到列表时我想要做的是编辑与该项目关联的 TextView，例如更改其颜色。我该怎么做呢？

原文

I have a ListView, which is backed by an ArrayAdapter. They are defined as such:

ListView listView = (ListView)findViewById(R.id.listview);
ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(this, R.layout.list_item);
listView.setAdapter(listAdapter);

list_item.xml contains the following:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    android:textSize="16sp">
</TextView>

What I would like to do when adding an item to the list, is edit the TextView associated with the item, like changing it's colour for example. How would I go about doing this?

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不如归去 2024-12-16 16:39:16

您可以重写 ArrayAdapter 的方法 getView() (参考链接）例如：

ListView listView = (ListView)findViewById(R.id.listview);
ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(this, R.layout.list_item){
   public View getView (int position, View convertView, ViewGroup parent){
      View v = super.getView(position,convertView,parent);
      TextView tx = (TextView) v;
      //do something with tx
      return v;
   }
};
listView.setAdapter(listAdapter);

You could override the method getView() of your ArrayAdapter (link to the reference) for example:

ListView listView = (ListView)findViewById(R.id.listview);
ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(this, R.layout.list_item){
   public View getView (int position, View convertView, ViewGroup parent){
      View v = super.getView(position,convertView,parent);
      TextView tx = (TextView) v;
      //do something with tx
      return v;
   }
};
listView.setAdapter(listAdapter);

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