我有一个像这样的可扩展回收器 View
我想合并同名标题(例如“2016 年 11 月 17 日”)。并将他们的 child 添加到一个地方。
和图标位置必须保持不变。如何做到这一点？
这是我的 json 响应:
{"Table":
[{"filedate":"Oct 25, 2016","clientid":4},
{"filedate":"Nov 17, 2016","clientid":4},
{"filedate":"Nov 16, 2016","clientid":4}],
"Table1":
[{"filedate":"Oct 25, 2016","file1":"12.txt","category":"Category : Bank Statement"},
{"filedate":"Nov 16, 2016","file1":"Readme.docx","category":"Category : Bank Statement"},
{"filedate":"Nov 17, 2016","file1":"hts-log.txt","category":"Category : Bills"},
{"filedate":"Nov 17, 2016","file1":"cookies.txt","category":"Category : Others",},
{"filedate":"Nov 17, 2016","file1":"readme.txt","category":"Category : Invoice",}]}
这是我获取 json 响应的代码:
private void prepareListData() {
// Volley's json array request object
StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
// Log.d(TAG, response.toString());
// hidePDialog();
JSONObject object = null;
try {
object = new JSONObject(response);
} catch (JSONException e) {
e.printStackTrace();
}
JSONArray jsonarray = null;
JSONArray jsonarray1 = null;
try {
jsonarray = object.getJSONArray("Table1");
jsonarray1 = object.getJSONArray("Table1");
} catch (JSONException e) {
e.printStackTrace();
}
// JSONArray jsonarray1 = object.getJSONArray("Table2");
for (int i = 0; i < jsonarray.length(); i++) {
try {
JSONObject obj = jsonarray.getJSONObject(i);
// Movie movie = new Movie();
// movie.setFiledate(obj.getString("filedate"));
String str = obj.optString("filedate").trim();
Log.d("test", str);
data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.HEADER, str));
// Toast.makeText(getApplicationContext(), lth, Toast.LENGTH_LONG).show();
for (int j = 0; j < jsonarray1.length(); j++) {
try {
JSONObject obj1 = jsonarray1.getJSONObject(j);
String str1 = obj1.optString("filedate").trim();
String str2 = obj1.optString("file1").trim();
String str3 = obj1.optString("filename").trim();
String str4 = obj1.optString("category").trim();
Toast.makeText(getApplicationContext(), "server data respone", Toast.LENGTH_LONG).show();
Toast.makeText(getApplicationContext(), "test"+str1, Toast.LENGTH_LONG).show();
if (str == str1) {
data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, str4));
data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, str2));
}
Toast.makeText(getApplicationContext(), str1, Toast.LENGTH_LONG).show();
//if condition
} catch (JSONException e) {
// Log.e(TAG, "JSON Parsing error: " + e.getMessage());
}
}
// adding movie to movies array
} catch (JSONException e) {
Log.e("gdshfsjkg", "JSON Parsing error: " + e.getMessage());
}
} Log.d("test", String.valueOf(data));
// notifying list adapter about data changes
// so that it renders the list view with updated data
// adapterheader.notifyDataSetChanged();
recyclerview.setAdapter(new ExpandableListAdapter(data));
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// VolleyLog.d(TAG, "Error: " + error.getMessage());
// hidePDialog();
}
}){
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(CLIENT, "4");
return params;
}
};
// Adding request to request queue
MyApplication.getInstance().addToRequestQueue(stringRequest);
}
适配类
public class ExpandableListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final int HEADER = 0;
public static final int CHILD = 1;
private List<Item> data;
public ExpandableListAdapter(List<Item> data) {
this.data = data;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int type) {
View view = null;
Context context = parent.getContext();
float dp = context.getResources().getDisplayMetrics().density;
int subItemPaddingLeft = (int) (18 * dp);
int subItemPaddingTopAndBottom = (int) (5 * dp);
LayoutInflater inflater = (LayoutInflater) parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
switch (type) {
case HEADER:
view = inflater.inflate(R.layout.list_header, parent, false);
ListHeaderViewHolder header = new ListHeaderViewHolder(view);
return header;
case CHILD:
view = inflater.inflate(R.layout.listchild, parent, false);
ListChildViewHolder child = new ListChildViewHolder(view);
return child;
}
return null;
}
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
final Item item = data.get(position);
switch (item.type) {
case HEADER:
final ListHeaderViewHolder itemController = (ListHeaderViewHolder) holder;
itemController.refferalItem = item;
itemController.header_title.setText(item.text);
if (item.invisibleChildren == null) {
itemController.btn_expand_toggle.setImageResource(R.drawable.circle_minus);
} else {
itemController.btn_expand_toggle.setImageResource(R.drawable.circle_plus);
}
itemController.btn_expand_toggle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (item.invisibleChildren == null) {
item.invisibleChildren = new ArrayList<Item>();
int count = 0;
int pos = data.indexOf(itemController.refferalItem);
while (data.size() > pos + 1 && data.get(pos + 1).type == CHILD) {
item.invisibleChildren.add(data.remove(pos + 1));
count++;
}
notifyItemRangeRemoved(pos + 1, count);
itemController.btn_expand_toggle.setImageResource(R.drawable.circle_plus);
} else {
int pos = data.indexOf(itemController.refferalItem);
int index = pos + 1;
for (Item i : item.invisibleChildren) {
data.add(index, i);
index++;
}
notifyItemRangeInserted(pos + 1, index - pos - 1);
itemController.btn_expand_toggle.setImageResource(R.drawable.circle_minus);
item.invisibleChildren = null;
}
}
});
break;
case CHILD:
boolean showIcon = position > 1 && getItemViewType(position) == CHILD && getItemViewType(position - 2) == HEADER;
final ListChildViewHolder itemController1 = (ListChildViewHolder) holder;
itemController1.refferalItem = item;
itemController1.header_title1.setText(item.text);
itemController1.btn_expand_toggle1.setVisibility((showIcon) ? View.VISIBLE : View.GONE);
break;
}
}
@Override
public int getItemViewType(int position) {
return data.get(position).type;
}
@Override
public int getItemCount() {
return data.size();
}
private static class ListHeaderViewHolder extends RecyclerView.ViewHolder {
public TextView header_title;
public ImageView btn_expand_toggle;
public Item refferalItem;
public ListHeaderViewHolder(View itemView) {
super(itemView);
header_title = (TextView) itemView.findViewById(R.id.header_title);
btn_expand_toggle = (ImageView) itemView.findViewById(R.id.btn_expand_toggle);
}
}
private static class ListChildViewHolder extends RecyclerView.ViewHolder {
public TextView header_title1;
public ImageView btn_expand_toggle1;
public Item refferalItem;
public ListChildViewHolder(View itemView) {
super(itemView);
header_title1 = (TextView) itemView.findViewById(R.id.header_title1);
btn_expand_toggle1 = (ImageView) itemView.findViewById(R.id.btn_expand_toggle1);
}
}
public static class Item {
public int type;
public String text;
public List<Item> invisibleChildren;
public Item() {
}
public Item(int type, String text) {
this.type = type;
this.text = text;
}
}
}
最佳答案
您可以使用图书馆 SectionedRecyclerViewAdapter将您的 Item 对象分组在同一标题下。
首先创建一个Section类:
class MySection extends StatelessSection {
Item item;
public MySection(Item item) {
// call constructor with layout resources for this Section header, footer and items
super(R.layout.section_header, R.layout.section_item);
this.item = item;
}
@Override
public int getContentItemsTotal() {
return item.invisibleChildren.size(); // number of items of this section, TODO: check if invisibleChildren is null and return 0
}
@Override
public RecyclerView.ViewHolder getItemViewHolder(View view) {
// return a custom instance of ViewHolder for the items of this section
return new MyItemViewHolder(view);
}
@Override
public void onBindItemViewHolder(RecyclerView.ViewHolder holder, int position) {
MyItemViewHolder itemHolder = (MyItemViewHolder) holder;
// bind your view here
itemHolder.tvItem.setText(item.invisibleChildren.get(position).text);
}
@Override
public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
return new SimpleHeaderViewHolder(view);
}
@Override
public void onBindHeaderViewHolder(RecyclerView.ViewHolder holder) {
MyHeaderViewHolder headerHolder = (MyHeaderViewHolder) holder;
// bind your header view here
headerHolder.tvItem.setText(item.text);
}
}
然后您使用您的 Sections 设置 RecyclerView:
// Create an instance of SectionedRecyclerViewAdapter
SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter();
// Add your Sections to the adapter
sectionAdapter.addSection(new MySection(data.get(0));
sectionAdapter.addSection(new MySection(data.get(1)); //TODO: add a for loop and add all Item objects from data list
// Set up your RecyclerView with the SectionedRecyclerViewAdapter
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(sectionAdapter);
要使其可扩展，请按照示例 here .
关于android - 如何在可扩展的 RecyclerView 中合并相同命名的 header ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40671439/