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我需要ListView在 Android 中创建一个具有标题并且是多行的。我用它来显示作业标题和它下面的截止日期。作业在两个标题下排序：“即将到来的作业”和“过去的作业”（当然，基于日期）。

我的标题工作正常，作业标题显示正确，但我不知道如何将第二行合并到列表中。

这是我的代码：

ListCourseAssignments.java

@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    final SeparatedListAdapter adapter;
    setContentView(R.layout.courseassignmentslistview);
    adapter = new SeparatedListAdapter(getContext());
    ArrayAdapter<String> upcomingList = new ArrayAdapter<String>(getContext(), R.layout.list_item, Homework.getUpcomingDates()); // Homework.getUpcomingDates() Returns string array
    ArrayAdapter<String> pastList = new ArrayAdapter<String>(getContext(), R.layout.list_item, Homework.getPastDates()); // Homework.getPastDates() Returns string array

    adapter.addSection("Upcoming Assignments", upcomingList); 
    adapter.addSection("Past Assignments", pastList);

    ListView lv = (ListView) findViewById(android.R.id.list);
    lv.setAdapter(adapter);

    lv.setOnItemClickListener(new OnItemClickListener(){
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long duration){
            String item = (String) adapter.getItem(position);
            Toast.makeText(getApplicationContext(), item, Toast.LENGTH_SHORT).show();
        }
    });
}

分离列表适配器.java

public class SeparatedListAdapter extends BaseAdapter {
public final Map<String, Adapter> sections = new LinkedHashMap<String, Adapter>();
public final ArrayAdapter<String> headers;

public SeparatedListAdapter(Context context) {
    headers = new ArrayAdapter<String>(context, R.layout.courseassignmentslistview_header);
}

public void addSection(String section, Adapter adapter) {
    this.headers.add(section);
    this.sections.put(section, adapter);
}

public Object getItem(int position) {
    for (Object section : this.sections.keySet()) {
        Adapter adapter = sections.get(section);
        int size = adapter.getCount() + 1;

        if (position == 0) return section;
        if (position < size) return adapter.getItem(position - 1);

        position -= size;
    }
    return null;
}

public int getCount() {
    int total = 0;
    for (Adapter adapter : this.sections.values()) total += adapter.getCount() + 1;
    return total;
}

@Override
public int getViewTypeCount() {
    int total = 1;
    for (Adapter adapter : this.sections.values()) total += adapter.getViewTypeCount();
    return total;
}

@Override
public int getItemViewType(int position) {
    int type = 1;
    for (Object section : this.sections.keySet()) {
        Adapter adapter = sections.get(section);
        int size = adapter.getCount() + 1;

        if (position == 0) return 0;
        if (position < size) return type + adapter.getItemViewType(position - 1);

        position -= size;
        type += adapter.getViewTypeCount();
    }
    return -1;
}

public boolean areAllItemsSelectable() {
    return false;
}

@Override
public boolean isEnabled(int position) {
    return (getItemViewType(position) != 0);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    int sectionnum = 0;
    for (Object section : this.sections.keySet()) {
        Adapter adapter = sections.get(section);
        int size = adapter.getCount() + 1;

        if (position == 0) return headers.getView(sectionnum, convertView, parent);
        if (position < size) return adapter.getView(position - 1, convertView, parent);

        position -= size;
        sectionnum++;
    }
    return null;
}

@Override
public long getItemId(int position) {
    return position;
}
}

courseassignmentslistview_header.xml

<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/list_header_title"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingTop="2dip"
    android:paddingBottom="2dip"
    android:paddingLeft="5dip"
    style="?android:attr/listSeparatorTextViewStyle" />

courseassignmentslistview.xml

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

    <ListView
        android:id="@+android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

列表项.xml

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

这是它当前外观的屏幕截图。

编辑：我知道如何使用多行创建一个列表，但我只是不知道如何将它与带有标题的列表（例如这个）放在一起......

4

1 回答 1

1

我不知道如何用你目前拥有的东西来做，但你可以用 CommonWare 的 MergeAdapter 来做。

引用自述文件：

MergeAdapter accepts a mix of Adapters and Views and presents them as one contiguous 
whole to whatever ListView it is poured into. This is good for cases where you have
multiple data sources, or if you have a handful of ordinary Views to mix in with lists 
of data, or the like.

你可以在这里得到它。

我在这里写了一个使用它的简要概述

使用 MergeAdapter，您可以通过为它们提供视图来使用它来制作节标题，然后设置适配器以创建所需的两行格式。

于 2012-05-23T04:25:54.867 回答