所以,我的项目布局(thread_item.xml)如下所示：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="300dip"
        >
    <TextView android:id="@+id/thread_item_title"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="[dummy]"
              android:textSize="20dip"
              android:textStyle="bold"
            />
    <ImageView android:id="@+id/thread_first_image"
               android:layout_below="@id/thread_item_title"
               android:scaleType="centerInside"
               android:maxWidth="100dip"
               android:maxHeight="100dip"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:adjustViewBounds="true" />
    <TextView
            android:id="@+id/thread_item_preview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@id/thread_first_image"
            android:text="[dummy]"
            android:textSize="15dip">
    </TextView>
</RelativeLayout>

我将根元素的layout_height设置为300dip,并且希望所有项目具有相同的高度,但是它们没有.当我运行应用程序时,它的高度看起来像一个wrap_content值.

此外,活动本身如下所示：

public class ThreadListActivity extends ListActivity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        
        /*
         Code to get items from the storage.
        */

        setListAdapter(new ThreadItemAdapter(this,R.layout.thread_item,itemsArray)));


        getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView,View view,int position,long id) {
                /*Start new Activity. Unrelated stuff.*/
            }
        });
    }
}

而我正在使用的适配器如下所示：

public class ThreadItemAdapter extends ArrayAdapter<ThreadItem> {

    Activity context;
    List<ThreadItem> items;

    public ThreadItemAdapter(Activity context,int textViewResourceId,List<ThreadItem> items) {
        super(context,textViewResourceId,items);
        this.context = context;
        this.items = items;
    }

    @Override
    public View getView(int position,View convertView,ViewGroup parent) {
        LayoutInflater inf = this.context.getLayoutInflater();
        View result;
        if (convertView == null) {
            result = inf.inflate(R.layout.thread_item,null);
        } else {
            result = convertView;
        }

        TextView tbTitle = (TextView) result.findViewById(R.id.thread_item_title);
        TextView tbPreview = (TextView) result.findViewById(R.id.thread_item_preview);
        ImageView ivFirstImage = (ImageView) result.findViewById(R.id.thread_first_image);

        ThreadItem item = items.get(position);

        tbTitle.setText(item.getThreadTitle());
        ivFirstImage.setImageBitmap(item.getFirstImage());

        SimpleLeadingMarginSpan span = new SimpleLeadingMarginSpan(item.getFirstImage() != null ? 5 : 0,115); // TODO: const
        SpannableString previewText = new SpannableString(item.getThreadPreview());
        previewText.setSpan(span,previewText.length(),0);
        tbPreview.setText(previewText);

        return result;
    }
}

我看不清为什么所有的列表项仍然包装他们的内容,不要保持300dip的高度.它们可能小于或者大于300dip.
我正在使用Android 2.3.3,测试HTC Evo 3D设备和仿真器(都显示相同的结果).

非常感谢！

UPD：

感谢米格尔和萨姆.解决方案是将maxHeight设置为textView,这使我的列表项目增长(这将是id / thread_item_preview),并将RelativeLayout的minHeight设置为300dip,以防止它收缩.