blocks|key|3067270|text|我还没有找到一个使用内置布局、android.R.layout.two_line_list_item和ListActivity的ListView实例的示例。这样就可以了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3067271|如果您赶时间，下面的TwoLineArrayAdapter.getView()+two_line_list_item+override是使用默认布局的重要部分。|BOLD|3067272|您的数据|3067273|您有一个定义列表项的类。我假设你有一个这样的数组。|3067274|public+class+Employee+{
++++public+String+name;
++++public+String+title;
}|code-block|syntax|javascript|3067275|一个抽象的TwoLineArrayAdapter|3067276|这个抽象类可以重用，并使以后定义两行ListView变得更容易。您可以提供自己的布局，但是双参数构造函数使用内置的two_line_list_item布局。与TextView+two_line_list_item+一样，自定义列表项布局的唯一要求是必须使用+@android:id/text1+和+@android:id/text2+来标识其two_line_list_item子项。|3067277|public+abstract+class+TwoLineArrayAdapter<T>+extends+ArrayAdapter<T>+{
++++++++private+int+mListItemLayoutResId;

++++++++public+TwoLineArrayAdapter(Context+context,+T[]+ts)+{
++++++++++++this(context,+android.R.layout.two_line_list_item,+ts);
++++++++}

++++++++public+TwoLineArrayAdapter(
++++++++++++++++Context+context,+
++++++++++++++++int+listItemLayoutResourceId,
++++++++++++++++T[]+ts)+{
++++++++++++super(context,+listItemLayoutResourceId,+ts);
++++++++++++mListItemLayoutResId+=+listItemLayoutResourceId;
++++++++}

++++++++@Override
++++++++public+android.view.View+getView(
++++++++++++++++int+position,+
++++++++++++++++View+convertView,
++++++++++++++++ViewGroup+parent)+{


++++++++++++LayoutInflater+inflater+=+(LayoutInflater)getContext()
++++++++++++++++.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

++++++++++++View+listItemView+=+convertView;
++++++++++++if+(null+==+convertView)+{+
++++++++++++++++listItemView+=+inflater.inflate(
++++++++++++++++++++mListItemLayoutResId,+
++++++++++++++++++++parent,+
++++++++++++++++++++false);
++++++++++++}

++++++++++++//+The+ListItemLayout+must+use+the+standard+text+item+IDs.
++++++++++++TextView+lineOneView+=+(TextView)listItemView.findViewById(
++++++++++++++++android.R.id.text1);
++++++++++++TextView+lineTwoView+=+(TextView)listItemView.findViewById(
++++++++++++++++android.R.id.text2);

++++++++++++T+t+=+(T)getItem(position);+
++++++++++++lineOneView.setText(lineOneText(t));
++++++++++++lineTwoView.setText(lineTwoText(t));

++++++++++++return+listItemView;
++++++++}

++++++++public+abstract+String+lineOneText(T+t);

++++++++public+abstract+String+lineTwoText(T+t);
}|3067278|一个具体的TwoLineArrayAdapter|3067279|最后，下面是针对Employee类编写的代码，以便在ListView中呈现。|3067280|public+class+EmployeeArrayAdapter+extends+TwoLineArrayAdapter<Employee>+{
++++public+EmployeeArrayAdapter(Context+context,+Employee[]+employees)+{
++++++++super(context,+employees);
++++}

++++@Override
++++public+String+lineOneText(Employee+e)+{
++++++++return+e.name;
++++}

++++@Override
++++public+String+lineTwoText(Employee+e)+{
++++++++return+e.title;
++++}
}|3067281|Activity.onCreate()|3067282|在您的活动的onCreate()方法中，您将拥有如下代码：|3067283|++++employees+=+new+Employee[...];
++++//...populate+the+employee+array...

++++employeeLV+=+(ListView)findViewById(R.id.employee_list);
++++employeeLV.setAdapter(new+EmployeeArrayAdapter(this,+employees);|3067284|entityMap^0|F|Z|1F|C|1S|8|0|A|T|14|I|1N|L|A|T|14|I|0|0|0|0|0|I|8|1L|I|27|8|2G|I|3L|H|45|H|4R|I|27|8|2G|I|2Z|L|3L|H|43|1|45|H|4N|P|0|0|0|Q|8|0|0|0|6|A|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1I|8|@$9|1J|A|1K|B|H]|$9|1L|A|1M|B|H]|$9|1N|A|1O|B|H]|$9|1P|A|1Q|B|C]|$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|I|3|J|5|6|7|1T|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|1U|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|1V|8|@]|D|@]|E|$P|Q]]|$1|R|3|S|5|6|7|1W|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|1X|8|@$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]|$9|22|A|23|B|C]|$9|24|A|25|B|C]|$9|26|A|27|B|C]|$9|28|A|29|B|C]|$9|2A|A|2B|B|C]|$9|2C|A|2D|B|H]|$9|2E|A|2F|B|H]|$9|2G|A|2H|B|H]|$9|2I|A|2J|B|H]|$9|2K|A|2L|B|H]|$9|2M|A|2N|B|H]|$9|2O|A|2P|B|H]]|D|@]|E|$]]|$1|V|3|W|5|O|7|2Q|8|@]|D|@]|E|$P|Q]]|$1|X|3|Y|5|6|7|2R|8|@]|D|@]|E|$]]|$1|Z|3|10|5|6|7|2S|8|@$9|2T|A|2U|B|C]]|D|@]|E|$]]|$1|11|3|12|5|O|7|2V|8|@]|D|@]|E|$P|Q]]|$1|13|3|14|5|6|7|2W|8|@]|D|@]|E|$]]|$1|15|3|16|5|6|7|2X|8|@$9|2Y|A|2Z|B|C]]|D|@]|E|$]]|$1|17|3|18|5|O|7|30|8|@]|D|@]|E|$P|Q]]|$1|19|3|-4|5|6|7|31|8|@]|D|@]|E|$]]]|1A|$]]

<p>I have yet to find an example that actually uses the built-in layout, <code>android.R.layout.two_line_list_item</code> and a <code>ListView</code> insted of <code>ListActivity</code>.  So here goes.</p>

<p><strong>If you're in a hurry, the <code>TwoLineArrayAdapter.getView()</code> override below is the important part of using the default <code>two_line_list_item</code> layout.</strong></p>

<h1>Your data</h1>

<p>You have a class that defines your list items.  I'll assume you have an array of these.</p>

<pre><code>public class Employee {
    public String name;
    public String title;
}
</code></pre>

<h1>An abstract TwoLineArrayAdapter</h1>

<p>This abstract class can be reused, and makes defining a two-line <code>ListView</code> much easier later.  You <em>can</em> supply your own layout, but the two argument constructor uses the built-in <code>two_line_list_item</code> layout.  <strong>The only requirement for custom list item layouts is that they must use <code>@android:id/text1</code> and <code>@android:id/text2</code> to identify their <code>TextView</code> children, just as <code>two_line_list_item</code> does.</strong></p>

<pre><code>public abstract class TwoLineArrayAdapter&lt;T&gt; extends ArrayAdapter&lt;T&gt; {
        private int mListItemLayoutResId;

        public TwoLineArrayAdapter(Context context, T[] ts) {
            this(context, android.R.layout.two_line_list_item, ts);
        }

        public TwoLineArrayAdapter(
                Context context, 
                int listItemLayoutResourceId,
                T[] ts) {
            super(context, listItemLayoutResourceId, ts);
            mListItemLayoutResId = listItemLayoutResourceId;
        }

        @Override
        public android.view.View getView(
                int position, 
                View convertView,
                ViewGroup parent) {


            LayoutInflater inflater = (LayoutInflater)getContext()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            View listItemView = convertView;
            if (null == convertView) { 
                listItemView = inflater.inflate(
                    mListItemLayoutResId, 
                    parent, 
                    false);
            }

            // The ListItemLayout must use the standard text item IDs.
            TextView lineOneView = (TextView)listItemView.findViewById(
                android.R.id.text1);
            TextView lineTwoView = (TextView)listItemView.findViewById(
                android.R.id.text2);

            T t = (T)getItem(position); 
            lineOneView.setText(lineOneText(t));
            lineTwoView.setText(lineTwoText(t));

            return listItemView;
        }

        public abstract String lineOneText(T t);

        public abstract String lineTwoText(T t);
}
</code></pre>

<h1>A concrete TwoLineArrayAdapter</h1>

<p>Finally, here's the code you write specific to your Employee class so that it'll render in your <code>ListView</code>.</p>

<pre><code>public class EmployeeArrayAdapter extends TwoLineArrayAdapter&lt;Employee&gt; {
    public EmployeeArrayAdapter(Context context, Employee[] employees) {
        super(context, employees);
    }

    @Override
    public String lineOneText(Employee e) {
        return e.name;
    }

    @Override
    public String lineTwoText(Employee e) {
        return e.title;
    }
}
</code></pre>

<h1>Activity.onCreate()</h1>

<p>In your Activity's <code>onCreate()</code> method, you'll have code that looks like this:</p>

<pre><code>    employees = new Employee[...];
    //...populate the employee array...

    employeeLV = (ListView)findViewById(R.id.employee_list);
    employeeLV.setAdapter(new EmployeeArrayAdapter(this, employees);
</code></pre>


<p>Can any one provide me two_line_list_item example?</p>


can any one provide me example of Two_line_list_item in Android?

有没有人能给我提供two_line_list_item的例子？

问有没有人能给我举个安卓Two_line_list_item的例子？
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