Android：BaseAdapter怎么样？ [英] Android : BaseAdapter how to?

问题描述

我已经能够实现一个简单的游标适配器
http：// developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/view/List7.html 。

这里有一个很好的BaseAdapter示例： List14 google example

我想使用BaseAdapter创建自己的列表适配器来显示一个包含数据库中多个项目的listView。我知道这可以使用简单的游标适配器，但我希望处理行不同，所以我想要能够通过覆盖getView绘制每一行。数据将从一个游标中取出。

我知道这个代码对于获取游标数据来说很丑陋，但假设我已经填充了一个游标。如果第8列包含图像资源ID，您对此有何建议。 ：

  @Override 
 public View getView（int position，View convertView，ViewGroup parent）{
 / / TODO自动生成方法存根
 cursor.moveToPosition（position）; 
 ImageView i = new ImageView（mContext）; 
 i.setImageResource（cursor.getShort（8））; 
 i.setAdjustViewBounds（true）; 
 i.setLayoutParams（new AbsListView.LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT））; 
 
 return i; 
} 
  

您有使用游标绘制BaseAdapter的好例子吗？

解决方案

尝试从 notifyDataSetChanged（） c $ c> BaseAdapter 本身。

请参阅 API演示的List8 为例。

Ok, I have been searching thick and thin, and I am having some issues implementing a BaseAdapter.

I have been able to implement a Simple Cursor Adapter http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/view/List7.html as per the example above.

There is a pretty good BaseAdapter example here : List14 google example

I am wanting to create my own List Adapter using BaseAdapter to show a listView, with multiple items from a Database. I know this can be done using the Simple Cursor Adapter, but I am looking to handle rows differently, so I want to be able to draw each row by overriding getView. The data would be pulled from a cursor.

I know this code is ugly for getting to the cursor data, but assuming I have populated a cursor. What suggestions do you have on this if column 8 contains the image resource id. :

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    cursor.moveToPosition(position);
    ImageView i = new ImageView(mContext);
    i.setImageResource(cursor.getShort(8));
    i.setAdjustViewBounds(true);
    i.setLayoutParams(new AbsListView.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

    return i;
}

Do you have any good examples of a BaseAdapter being drawn using a cursor?

解决方案

Try calling notifyDataSetChanged() from a method inside the BaseAdapter itself.

See the methods in List8 of the API Demos as an example.

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