Question

我正在尝试实现一个自定义ListView，其中包含分隔符。这是代码：

SINGLETITLE：

public class SingleTitle {
    String mTitle;
    int[] mInterval;

    public SingleTitle(String title, int[] interval) {
        mTitle = title;
        mInterval = interval;
    }

    public String getTitle() {
        return mTitle;
    }

    public int[] getInterval() {
        return mInterval;
    }
}

TitleCategory：

public class TitleCategory {
String mTitle;

public TitleCategory(String title) {
    mTitle = title;
}

public String getTitle() {
    return mTitle;
}
}

list_category_divider.xml：

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<include
    android:id="@+id/list_item_section_text"
    layout="@android:layout/preference_category" />

</ LinearLayout >

返回列表的方法：

    public static List<Object> getStructuredTitles(Context context) {
    List<Object> list = new ArrayList<Object>();
    String[] mTitles = getCategoriesTitles(context);
    String[] mParts = getPartsTitles(context);

    list.add(new TitleCategory(mParts[0]));
    list.add(new SingleTitle(mTitles[0], CATEGORIES_INTERVALS[0]));
    list.add(new TitleCategory(mParts[1]));
    list.add(new SingleTitle(mTitles[1], CATEGORIES_INTERVALS[1]));
    list.add(new SingleTitle(mTitles[2], CATEGORIES_INTERVALS[2]));
    list.add(new SingleTitle(mTitles[3], CATEGORIES_INTERVALS[3]));
    list.add(new SingleTitle(mTitles[4], CATEGORIES_INTERVALS[4]));
    list.add(new TitleCategory(mParts[2]));
    list.add(new SingleTitle(mTitles[5], CATEGORIES_INTERVALS[5]));
    list.add(new SingleTitle(mTitles[6], CATEGORIES_INTERVALS[6]));
    list.add(new SingleTitle(mTitles[7], CATEGORIES_INTERVALS[7]));
    list.add(new SingleTitle(mTitles[8], CATEGORIES_INTERVALS[8]));
    list.add(new SingleTitle(mTitles[9], CATEGORIES_INTERVALS[9]));
    list.add(new SingleTitle(mTitles[10], CATEGORIES_INTERVALS[10]));
    list.add(new TitleCategory(mParts[3]));
    list.add(new SingleTitle(mTitles[11], CATEGORIES_INTERVALS[11]));

    return list;
}

我的自定义适配器：

  public class TitlesAdapter extends BaseAdapter {
private Context context;
private List<Object> entries;

public TitlesAdapter(Context context, List<Object> entries) {
    this.context = context;
    this.entries = entries;
}


@Override
public int getCount() {
    return entries.size();
}

@Override
public Object getItem(int position) {
    return entries.get(position);
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    Object entry = entries.get(position);
    boolean isCategory = (entry instanceof TitleCategory);

    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(isCategory ? R.layout.list_category_divider : R.layout.list_items_simple, null);
    }

    if (isCategory) {
        TitleCategory tc = (TitleCategory)entry;
        convertView.setClickable(false);

        Log.d("DBG", "Entry: " + position + " | " + tc.getTitle());
        TextView tv = (TextView) convertView.findViewById(android.R.id.simple_list_item_2);
        if (tv != null) tv.setText(tc.getTitle());
    } else {
        SingleTitle tc = (SingleTitle)entry;

        Log.d("DBG", "Entry: " + position + " | " + tc.getTitle());
        TextView tv = (TextView) convertView.findViewById(android.R.id.text1);
        if (tv != null) 
            tv.setText(tc.getTitle());
    }
    return convertView;

}


public List<Object> getList() {
    return entries;
}

public void setList(List<Object> newentries) {
    entries = newentries;
    notifyDataSetChanged();
}

}

我的问题： 应用程序最初很好地绘制列表，但是当我在列表中向上和向下滚动时，它会混淆条目。然而，logcat中生成的输出是正确的，但Android会搞砸列表。有什么想法吗？

更新： Correct one Wrong one

Answer 1

尝试实施getViewTypeCount()。在你的情况下它应该返回2.

@Override
public int getViewTypeCount() {
    return 2;
}

如果没有实现该方法，Android可能会对单个视图类型做出一些假设。

同时覆盖getItemViewType(int position)，使其返回0或1，具体取决于列表中的索引是否为＆＃39;类别＆＃39;或者＆＃39;标题＆＃39;。

@Override 
public int getItemViewType(int position) {
     ...
}

带分隔符的自定义ListView变得疯狂

1 个答案: