我坚持逻辑，无法达到预期的效果。我有一个回收站视图，它有另一个水平子回收站视图。我可以在点击项目时展开折叠视图。我希望当我点击一个元素时，只有当前位置应该扩展所有其他位置才会崩溃。我尝试了很多逻辑，但没有人为我工作。
我的回收站视图适配器代码是：
public class NewAdpater extends RecyclerView.Adapter<NewAdpater.ViewHolder> implements Response.ErrorListener {
Context context;
boolean flag=true;
private List<FetchDocument> docDatalist;
int customerSerial;
private int expandedPosition = -1;
private int vinappserial;
ImageFetchResponse response;
ArrayList<Bitmap> bitmaps;
SendHoldertdata sendHoldertdata;
UtilityOfActivity utilityOfActivity;
List<ImageFetchResponseDocumentList> list = new ArrayList<>();
public NewAdpater(List<FetchDocument> docDatalist, Context context, String vinappserial, SendHoldertdata sendHoldertdata) {
this.docDatalist = docDatalist;
this.context = context;
this.sendHoldertdata = sendHoldertdata;
utilityOfActivity = new UtilityOfActivity((Activity) context);
this.vinappserial = Integer.valueOf(vinappserial);
UserDetail userDetail = new Gson().fromJson(PrefrenceFile.getInstance().getString(Constant.PREF_KEY_USER_DATA), UserDetail.class);
customerSerial = userDetail.getLoginResponse().getCustInfo().getCustSerialNo();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).
inflate(R.layout.doc_send_item_list, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
holder.recyclerViewImages.setVisibility(View.GONE);
holder.doc_type.setText(docDatalist.get(position).getDocTypeDesc());
// expandedPosition=holder.getAdapterPosition();
holder.myDocumentListCollapse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
boolean shouldExpand = holder.recyclerViewImages.getVisibility() == View.GONE;
if (shouldExpand) {
holder.recyclerViewImages.setVisibility(View.VISIBLE);
holder.iconexpandCollapse.setImageResource(R.mipmap.expand_4);
imagerequestserver(docDatalist.get(position), vinappserial, holder);
// DocumentImageFetchResponseListner setData= new DocumentImageFetchResponseListner(holder);
} else {
holder.recyclerViewImages.setVisibility(View.GONE);
holder.iconexpandCollapse.setImageResource(R.mipmap.expand);
}
}
});
}
@Override
public int getItemCount() {
return docDatalist.size();
}
public interface SendHoldertdata {
void setdata(ArrayList<Bitmap> bitmapArrayList, int count);
}
class ViewHolder extends RecyclerView.ViewHolder {
TextView doc_type;
LinearLayout myDocumentListCollapse;
RelativeLayout layoutAddDoc;
ImageView iconexpandCollapse;
RecyclerView recyclerViewImages;
public ViewHolder(View itemView) {
super(itemView);
doc_type = itemView.findViewById(R.id.doc_type);
myDocumentListCollapse = itemView.findViewById(R.id.myDocumentListCollapse);
layoutAddDoc = itemView.findViewById(R.id.layoutAddDoc);
iconexpandCollapse = itemView.findViewById(R.id.iconexpandCollapse);
recyclerViewImages = itemView.findViewById(R.id.recyclerViewImages);
recyclerViewImages.setVisibility(View.GONE);
}
}
public void imagerequestserver(FetchDocument fetchDocument, int vinappserial, ViewHolder holder) {
ImageFetchRequest imageFetchRequest = new ImageFetchRequest();
imageFetchRequest.setCustSerial(customerSerial);
imageFetchRequest.setDocGroup(fetchDocument.getDocTypeCode());
imageFetchRequest.setVehSerial(String.valueOf(vinappserial));
imageFetchRequest.setDocSerial("0");
String url = Constant.API_MAIN + Constant.API_DOCUMENT_IMAGEFETCH;
AbstractVolleyRequest jsonObjectrequest = new
AbstractVolleyRequest(url, this, new DocumentImageFetchResponseListner(fetchDocument, vinappserial, holder), imageFetchRequest, Request.Method.POST);
jsonObjectrequest.setTag("DocumentImageFetchRequest");
Log.v("DocumentFetchRequest", "DocumentImageFetchRequest" + jsonObjectrequest);
VolleyRequestQue.getmInstance(context.getApplicationContext()).addToRequestQueue(jsonObjectrequest);
}
@Override
public void onErrorResponse(VolleyError error) {
if (context != null) {
utilityOfActivity.progresDissmiss();
}
utilityOfActivity.toast(context.getString(R.string.connectivity_server_error));
}
public class DocumentImageFetchResponseListner extends MyListner<ImageFetchResponse> implements MailDocumentListAdapter.ISelectedImageMail {
FetchDocument fetchDocument;
String vinappserial;
public ViewHolder holder;
public DocumentImageFetchResponseListner(FetchDocument fetchDocument, int vinappserial, ViewHolder holder) {
super(ImageFetchResponse.class);
this.vinappserial = String.valueOf(vinappserial);
this.fetchDocument = fetchDocument;
this.holder = holder;
utilityOfActivity.progressDialogShow(context.getString(R.string.please_wait));
}
@Override
public void onResponse(MyResponse instaResponse) {
utilityOfActivity.progresDissmiss();
if (instaResponse != null) {
if (instaResponse instanceof ImageFetchResponse) {
response = (ImageFetchResponse) instaResponse;
if (response.getResult().getResultStatus().contains("SUCCESS")) {
list = response.getDocumentList();
// list.addAll(newList);
Log.d("", "");
if (list.size() > 0) {
setData();
}
} else {
utilityOfActivity.toast(context.getString(R.string.connectivity_server_error));
}
}
}
}
private void setData() {
MailDocumentListAdapter recyclerViewNewAdpater = new MailDocumentListAdapter(context, list, this);
holder.recyclerViewImages.setLayoutManager(new GridLayoutManager(context, 3));
recyclerViewNewAdpater.notifyDataSetChanged();
holder.recyclerViewImages.setAdapter(recyclerViewNewAdpater);
}
@Override
public void sendBitMap(ArrayList<Bitmap> itemSelectedArrayList,int count) {
bitmaps = itemSelectedArrayList;
sendHoldertdata.setdata(bitmaps,count);
}
}
}
这是我的DialogFragment，我在其中设置适配器：
public class DialogMailDocument extends DialogFragment implements NewAdpater.SendHoldertdata {
TextView txtCount;
int count=0;
ImageView documentCross;
RecyclerView recyclerViewDocument;
UtilityOfActivity utilityOfActivity;
AppCompatActivity appCompatActivity;
NewAdpater mainAdapter;
private int expandedPosition = -1;
Context mContext;
ArrayList<Bitmap> sendImageBitmap = new ArrayList<>();
List<ImageFetchResponseDocumentList> imageFetchResponseDocumentLists;
List<FetchDocument> fetchDocuments;
String vinappSerail;
MailDocumentListAdapter.ISelectedImageMail selectedImageMail;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(DialogFragment.STYLE_NORMAL, R.style.fullscreen_dialog);
}
private void init(View view) {
txtCount = view.findViewById(R.id.txtCount);
// selectAll = view.findViewById(R.id.selectAll);
recyclerViewDocument = view.findViewById(R.id.recyclerViewDocument);
TextView tvSendDoc = view.findViewById(R.id.tvSendDoc);
documentCross = view.findViewById(R.id.documentCross);
documentCross.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
getDialog().dismiss();
}
});
tvSendDoc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (sendImageBitmap != null) {
email(getActivity(), "xyz@gmail.com", "hello", sendImageBitmap);
} else {
Toast.makeText(getActivity(), "Nothing is selected", Toast.LENGTH_SHORT).show();
}
}
});
setDocumentRecyclerView();
}
public DialogMailDocument newInstance(MailDocumentListAdapter.ISelectedImageMail iSelectedImageMail) {
DialogMailDocument fragment = new DialogMailDocument();
this.selectedImageMail = iSelectedImageMail;
return fragment;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
utilityOfActivity = new UtilityOfActivity(activity);
appCompatActivity = (AppCompatActivity) activity;
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
mContext = context;
}
@Override
public void onStart() {
super.onStart();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.dialog_mail_document, container, false);
Bundle bundle = getArguments();
if (bundle != null) {
imageFetchResponseDocumentLists = bundle.getParcelableArrayList("documentList");
fetchDocuments = bundle.getParcelableArrayList("documentListHead");
vinappSerail = bundle.getString("vinappSerail");
}
init(view);
return view;
}
private void setDocumentRecyclerView() {
mainAdapter = new NewAdpater(fetchDocuments, getActivity(), vinappSerail, this,expandedPosition);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
recyclerViewDocument.setLayoutManager(mLayoutManager);
recyclerViewDocument.setAdapter(mainAdapter);
//
// GridLayoutManager manager =
// new GridLayoutManager(getActivity(), 3);
// recyclerViewDocument.setLayoutManager(manager);
// mainAdapter.setLayoutManager(manager);
// adapter.shouldShowHeadersForEmptySections(hideEmpty);
// adapter.shouldShowFooters(showFooters);
recyclerViewDocument.setAdapter(mainAdapter);
mainAdapter.notifyDataSetChanged();
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public void email(Context context, String emailTo, String emailText, ArrayList<Bitmap> filePaths) {
//need to "send multiple" to get more than one attachment
final Intent emailIntent = new Intent(Intent.ACTION_SEND_MULTIPLE);
emailIntent.setType("image/*");
emailIntent.putExtra(Intent.EXTRA_EMAIL,
new String[]{emailTo});
emailIntent.putExtra(Intent.EXTRA_TEXT, emailText);
//has to be an ArrayList
ArrayList<Uri> uris = new ArrayList<Uri>();
//convert from paths to Android friendly Parcelable Uri's
for (Bitmap file : filePaths) {
Uri u = getImageUri(getActivity(), file);
uris.add(u);
}
emailIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
context.startActivity(Intent.createChooser(emailIntent, "Send mail..."));
}
@Override
public void setdata(ArrayList<Bitmap> bitmapArrayList,int count) {
sendImageBitmap = bitmapArrayList;
this.count=count;
txtCount.setText(String.valueOf(count)+" selected");
}
@Override
public void setExpandedPosition(int expandedPosition) {
DialogMailDocument.this.expandedPosition = expandedPosition;
mainAdapter.notifyDataSetChanged();
}
}
答案 0 :(得分：1)
在模型类中使用布尔值“isShow”，默认情况下将其设置为false，用于Recyclerview的所有项目。
然后...
if (list.get(position).isShow()) {
// show item....
} else {
// hide item....
}
在onBindViewHolder方法中迭代一个for循环的最简单方法，如下所示。
for (int i = 0; i < list.size(); i++) {
if (i == position) {
if (list.get(position).isShow()) {
list.get(position).setShow(false);
} else {
list.get(position).setShow(true);
}
} else {
list.get(i).setShow(false);
}
notifyDataSetChanged();
}
向我询问更多疑问。
感谢。
答案 1 :(得分：0)
您应该在模型类中添加一个布尔变量（默认为false），如果您在单击时打开一个视图，请将该位置的标志设置为true，其余为false。根据这一点，首先检查位置项标志并根据它显示或消失。
答案 2 :(得分：0)
不要在适配器上设置它，而是将展开的孩子position保留在activity（或fragment）上并拨打notifyDataSetChanged()：
private int expandedPosition = -1; //just set -1 for default
public NewAdpater(List<FetchDocument> docDatalist, Context context, String vinappserial, SendHoldertdata sendHoldertdata, int expandedPosition) {
this.docDatalist = docDatalist;
this.context = context;
this.sendHoldertdata = sendHoldertdata;
utilityOfActivity = new UtilityOfActivity((Activity) context);
this.vinappserial = Integer.valueOf(vinappserial);
UserDetail userDetail = new Gson().fromJson(PrefrenceFile.getInstance().getString(Constant.PREF_KEY_USER_DATA), UserDetail.class);
customerSerial = userDetail.getLoginResponse().getCustInfo().getCustSerialNo();
this.expandedPosition = expandedPosition;
}
...more codes...
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
holder.recyclerViewImages.setVisibility(View.GONE);
holder.doc_type.setText(docDatalist.get(position).getDocTypeDesc());
if (expandedPosition == position) {
holder.recyclerViewImages.setVisibility(View.VISIBLE);
holder.iconexpandCollapse.setImageResource(R.mipmap.expand_4);
imagerequestserver(docDatalist.get(position), vinappserial, holder);
} else {
holder.recyclerViewImages.setVisibility(View.GONE);
holder.iconexpandCollapse.setImageResource(R.mipmap.expand);
}
// expandedPosition=holder.getAdapterPosition();
holder.myDocumentListCollapse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sendHoldertdata.setExpandedPosition(position);
}
});
}
public interface SendHoldertdata {
void setdata(ArrayList<Bitmap> bitmapArrayList, int count);
void setExpandedPosition(int expandedPosition);
}
在你的activity/fragment上（它就是你要通过的expandedPosition）：
private int expandedPosition = -1;
@Override
public void onCreate(Bundle saveInstanceState) {
...more code
NewAdpater newAdpater = new NewAdpater(docDataList, context, vinappserial, new SendHoldertdata() {
@Override
public void setdata(ArrayList<Bitmap> bitmapArrayList, int count) {
...your code
}
@Override
public void setExpandedPosition(int expandedPosition) {
YourActivityName.this.expandedPosition = expandedPosition;
newAdpater.notifyDataSetChanged(); //call this to refresh the state, so it will call the onBindViewHolder again on the adapter.
}
}, expandedPosition);
}
答案 3 :(得分：0)
这就是你如何做到的。根据此Expendable-Recycler-View，您可以在 parentViewHolder 中添加以下代码。 mArrowExpandImageView是我用来显示展开/折叠图标的imageView，点击它我完成了所有工作。您可以执行类似的操作以获得所需的结果。请查看库中的 ExpendableRecyclerAdapter 类，以便进行扩展和折叠。
@Override
public void setExpanded(boolean expanded) {
super.setExpanded(expanded);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
if (expanded) {
mArrowExpandImageView.setRotation(ROTATED_POSITION);
} else {
mArrowExpandImageView.setRotation(INITIAL_POSITION);
}
}
}
@Override
public void onExpansionToggled(boolean expanded) {
super.onExpansionToggled(expanded);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
RotateAnimation rotateAnimation;
if (expanded) { // rotate clockwise
rotateAnimation = new RotateAnimation(ROTATED_POSITION,
INITIAL_POSITION,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
} else { // rotate counterclockwise
rotateAnimation = new RotateAnimation(-1 * ROTATED_POSITION,
INITIAL_POSITION,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
}
rotateAnimation.setDuration(200);
rotateAnimation.setFillAfter(true);
mArrowExpandImageView.startAnimation(rotateAnimation);
}
}
然后在你的片段/活动中，你需要像这样实现展开崩溃监听器：
yourAdapter.setExpandCollapseListener(new ExpandableRecyclerAdapter.ExpandCollapseListener() {
@Override
public void onListItemExpanded(int position) {
expendedItemPosition = position;
yourAdapter.notifyDataSetChanged();
}
@Override
public void onListItemCollapsed(int position) {
expendedItemPosition = -1;
}
});