我不知道setlistadapter的问题是如何在所有工作 [英] setlistadapter problem I don't know how this works at all

问题描述

我遇到的麻烦setListAdapter（）。它告诉我刚刚创建的方法，因为它不知道这件事。我，现在，只是想获得一个列表来填充，我甚至不知道这是什么code在做什么。

I'm having trouble with the setListAdapter(). It tells me to just create the method because it doesn't know anything about it. I'm, for now, just trying to get a list to populate and I don't even know what this code is doing.

public class PassScreen extends Activity {
TextView selection;
ArrayList<String> items = new ArrayList<String>();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.passwordscreen);
    selection=(TextView)findViewById(R.id.selection);

    try { 
        InputStream in=getResources().openRawResource(R.raw.words);
        DocumentBuilder builder=DocumentBuilderFactory.newInstance().newDocumentBuilder();
        Document doc = builder.parse(in,null);
        NodeList words=doc.getElementsByTagName("word");
        for (int i =0;i<words.getLength();i++){
            items.add(((Element)words.item(i)).getAttribute("value"));
        }
        in.close();
    }
    catch (Throwable t){
        Toast.makeText(this, "Exception: " + t.toString(), 2000).show();
    }

            setListAdapter(new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1,
            items));

}
public void onListItemClick(ListView parent, View v, int position, long id){
    selection.setText(items.get(position).toString());
}
}

正如你可以看到我已经和我使用的XML文件。这看起来就像什么书的样子，但后来我又复制并粘贴setListAdapter（），所以我想这是不是所有的帮助。

As you can see I have and xml file that I'm using. That looks just like what the book looks like but then again I copy and pasted the setListAdapter() so I guess that's not all that helpful.

如果你也能告诉我是什么setListAdapter（）做这将是巨大的。我也没见过了解什么谷歌正在谈论。

If you could also show me what the setListAdapter() is doing that would be great. I can't seen to understand what google is talking about.

下面是XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TextView
android:id="@+id/selection"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>

<ListView
  android:id="@android:id/list"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:drawSelectorOnTop="false"/>

</LinearLayout>

和一些词的xml：

<words>
<word value="lorem"/>
<word value="ipsom"/>
<word value="dolor"/>
</words>

另外你能解释一下这是怎么回事？我根本不明白setListAdapter（）。或者只是指向谷歌搜索了白皮书。我找不到它。这不是就像我知道怎么看的东西了呢。

Also can you explain what's going on? I don't understand the setListAdapter() at all. Or just point to Googles white paper. I can't find it. It's not like I know how to look that stuff up anyway.

推荐答案

setListAdapter（）是不是你可以在一个活动调用一个方法（它可在 ListActivity 但你没有使用）。你将需要添加一个的ListView 到您的布局（/ RES /布局/ passwordscreen），然后找到它并调用 setAdapter 这一点。

setListAdapter() isn't a method you can call on an Activity (it is available on ListActivity but you're not using that). You're going to have to add a ListView into your layout (/res/layout/passwordscreen) and then find it and call setAdapter on that.

例如

ListView lv = (ListView) findViewById(R.id.mylistview);
lv.setAdapter(.....);

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