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如果这里提到的任何内容与我是 android 开发的初学者无关，请原谅。

我已经经历了许多 SO 问题和网络上的许多示例，解释了所有相同的事情，但没有一个符合我的要求，因为我需要动态填充标题和列表项。

终于来到这里寻求一些好的建议。

我的行布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/myview"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="top"
    android:orientation="horizontal"
    android:paddingLeft="10dp"
    android:paddingRight="10dp"
    android:paddingTop="5dp" >


    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/bg_card"
        android:orientation="horizontal" >

        <LinearLayout
            android:id="@+id/linearLayout3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >


            <TableLayout
                android:id="@+id/tableLayout4"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >

                <TableRow
                    android:id="@+id/tableRow5"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" >

                    <TextView
                        android:id="@+id/txtTitle"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="10dp"
                        android:layout_marginStart="10dp"
                        android:layout_weight="1"
                        android:textAppearance="?android:attr/textAppearanceMedium"
                        android:textColor="#000" />

                    <TextView
                        android:id="@+id/txtTime"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="20dp"
                        android:layout_marginStart="20dp"
                        android:layout_weight="1"
                        android:textColor="#000"
                        android:textSize="24sp" />
                </TableRow>

                <TableRow
                    android:id="@+id/tableRow6"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" >

                    <TextView
                        android:id="@+id/txtCategory"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="12dp"
                        android:layout_marginStart="12dp"
                        android:layout_weight="1"
                        android:textAppearance="?android:attr/textAppearanceSmall"
                        android:textColor="#0000FF" />
                </TableRow>
            </TableLayout>
        </LinearLayout>

        <ImageView
            android:id="@+id/btndelete"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_weight="1"
            android:scaleType="fitEnd"
            android:src="@drawable/ic_menu_delete" />

    </LinearLayout>

</RelativeLayout>

这是我的 BaseAdapter：

  class CustomAdapter extends BaseAdapter {

    private static final int TYPE_ITEM = 0;
    private static final int TYPE_SEPARATOR = 1;

    private ArrayList<String> mData = new ArrayList<String>();
    private TreeSet<Integer> sectionHeader = new TreeSet<Integer>();

    private LayoutInflater mInflater;

    public CustomAdapter(Context context) {
        mInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public void addItem(final String title, String category,String time) {
        mData.add(title);
        mData.add(category);
        mData.add(time);
        notifyDataSetChanged();
    }

    public void addSectionHeaderItem(final String item) {
        mData.add(item);
        sectionHeader.add(mData.size() - 1);
        notifyDataSetChanged();
    }

    @Override
    public int getItemViewType(int position) {
        return sectionHeader.contains(position) ? TYPE_SEPARATOR : TYPE_ITEM;
    }

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

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

    @Override
    public String getItem(int position) {
        return mData.get(position);
    }

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

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        int rowType = getItemViewType(position);

        if (convertView == null) {
            holder = new ViewHolder();
            switch (rowType) {
            case TYPE_ITEM:
                //convertView = mInflater.inflate(R.layout.snippet_item1, null);
                convertView = mInflater.inflate(R.layout.adapter_listview, parent, false);
                holder.textView = (TextView) convertView.findViewById(R.id.txtTitle);
                holder.txtCategory = (TextView) convertView.findViewById(R.id.txtCategory);
                holder.txtTime = (TextView) convertView.findViewById(R.id.txtTime);
                holder.btndelete = (ImageView) convertView.findViewById(R.id.btndelete);
                break;
            case TYPE_SEPARATOR:
                //convertView = mInflater.inflate(R.layout.adapter_listview, null);
                convertView = mInflater.inflate(R.layout.snippet_item1, parent, false);
                holder.textView = (TextView) convertView.findViewById(R.id.text);
                break;
            }
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.textView.setText(mData.get(position));

        return convertView;
    }

    public static class ViewHolder {
        public TextView textView;
        public TextView txtCategory;
        public TextView txtTime;
        public ImageView btndelete;
    }

}

这是我的家庭片段：

public class HomeFragment extends Fragment  {
     @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            private CustomAdapter mAdapter;
            View rootView = inflater.inflate(R.layout.fragment_home, container, false);  
             listViewData = (ListView)rootView.findViewById(R.id.listViewData);



           return rootView;
  }

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d(TAG, "onActivityResult called");
        if((requestCode == 1)&&(resultCode == Activity.RESULT_OK)){
            if(data!= null){
                   AddedTask=data.getStringExtra("NewTask");
                   CategoryName=data.getStringExtra("CategoryItem");
                   mAdapter.addSectionHeaderItem(CategoryName);
                   mAdapter.addItem(AddedTask);
                   mAdapter.addItem(TaskTime);
                   listViewData.setAdapter(mAdapter);
                   mAdapter.notifyDataSetChanged();
      }
    }
  }
}

结果输出为：

在此处输入图像描述

如您所见，我有一个包含所有视图的单行布局，但每个视图都在每一行中添加。

与此相关的代码在我的适配器中：

public void addItem(final String title, String category,String time) {
    mData.add(title);
    mData.add(category);
    mData.add(time);
    notifyDataSetChanged();
}

现在我有两个问题。

1.如何更改addItem()以获得以下输出

在此处输入图像描述

2.如何在添加新的时候检查是否存在一个标题并将其余项目添加到该标题下方。

谁能建议我这样做的更好方法

4

2 回答 2

1

将您的 CustomAdapter 更改为

  class CustomAdapter extends BaseAdapter {

private static final int TYPE_ITEM = 0;
private static final int TYPE_SEPARATOR = 1;

private Map<String, ArrayList<String>> mData = new HashMap<String, ArrayList<String>>();

private LayoutInflater mInflater;

public CustomAdapter(Context context) {
    mInflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

public void addItem(final String header, final String... contents) {
    if (mData.containsKey(header)) {
        ArrayList<String> item = new ArrayList<String>(mData.get(header));
        for(String content : contents) {
            item.add(content);
        }
        mData.remove(header);
        mData.put(header, item);
    } else {
        ArrayList<String> item = new ArrayList<String>();
        for(String content : contents) {
            item.add(content);
        }
        mData.put(header, item);
    }
    notifyDataSetChanged();
}


@Override
public int getItemViewType(int position) {
    return (position&1) == 0 ? TYPE_SEPARATOR : TYPE_ITEM;
}

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

@Override
public int getCount() {
    return mData.size() * 2;
}

@Override
public Object getItem(int position) {
    if (position&1 == 0) {
        Set<String> headers = mData.keySet();
        Iterator<String> iterator = headers.iterator();
        for (int i = 0; i < position / 2 && iterator.hasNext(); i++) {
            iterator.next();
        }
        return iterator.hasNext() ? iterator.next() : null;
    } else {
        Set<ArrayList<String>> items = mData.values();
        Iterator<ArrayList<String>> iterator = items.iterator();
        for (int i = 0; i < position / 2 && iterator.hasNext(); i++) {
            iterator.next();
        }
        return iterator.hasNext() ? iterator.next() : null;
    }
}

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

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    int rowType = getItemViewType(position);

    if (convertView == null) {
        switch (rowType) {
        case TYPE_ITEM:
            //convertView = mInflater.inflate(R.layout.snippet_item1, null);
            convertView = mInflater.inflate(R.layout.adapter_listview, parent, false);
            ArrayList<String> items = getItem(position);
            //handle your items here!
            (TextView) convertView.findViewById(R.id.txtTitle).setText()
            (TextView) convertView.findViewById(R.id.txtCategory).setText();
            (TextView) convertView.findViewById(R.id.txtTime).setText();
            (ImageView) convertView.findViewById(R.id.btndelete);
            break;
        case TYPE_SEPARATOR:
            //convertView = mInflater.inflate(R.layout.adapter_listview, null);
            convertView = mInflater.inflate(R.layout.snippet_item1, parent, false);
            (TextView) convertView.findViewById(R.id.text).setText(getItem(position));
            break;
        }
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    return convertView;
}

}

于 2015-05-16T07:10:02.927 回答
0

在这段代码中：

public void addItem(final String title, String category,String time) {
mData.add(title);
mData.add(category);
mData.add(time);
notifyDataSetChanged();
}

您正在尝试添加实际上三个项目，因此结果。

要获得所需的结果，请尝试以下操作：

class Item{
private String mTitle;
private String mCategory;
private String mTime;
public Item(String title,String time,String category){
mTitle=title;
mTime=time;
mCategory=category;
}
}

在 addItem() 中：

public void addItem(final String title, String category,String time) {
mData.add(new Item(title,category,time));
notifyDataSetChanged();
}

并更改 BaseAdapter 类以从列表中获取 Item 类的对象，然后为 elemnets 分配其相应的标题、时间和类别

希望能帮助到你 ：）

于 2015-05-16T07:01:20.237 回答