您好我有以下recycler adapter：
package com.example.app.adapters;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Filter;
import android.widget.Filterable;
import com.example.app.interfaces.iTicketsFilterListener;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.example.app.R;
import com.example.app.Utils;
import com.example.app.models.TicketModel;
import java.util.ArrayList;
public class ReservedTicketsArrayAdapter extends RecyclerView.Adapter<ReservedTicketsArrayAdapter.ViewHolder> implements Filterable {
public ArrayList<TicketModel> mTickets;
private TicketModel mTicket;
public String selectedDate;
Context mContext;
Typeface Anton;
private int altColour;
private ValueFilter mValueFilter;
private ArrayList<TicketModel> mStringFilterList;
private iTicketsFilterListener mFilterListener;
private ViewHolder mHolder;
public ReservedTicketsArrayAdapter(String selectedDate, @NonNull Context context, @NonNull ArrayList<TicketModel> tickets) {
mContext = context;
mTickets = new ArrayList(tickets);
mStringFilterList = new ArrayList(tickets);
this.selectedDate = selectedDate;
Anton = Typeface.createFromAsset(context.getAssets(), "fonts/Anton.ttf");
}
public ReservedTicketsArrayAdapter(String selectedDate, @NonNull Context context, @NonNull ArrayList<TicketModel> tickets, boolean twoPane) {
mContext = context;
mTickets = new ArrayList(tickets);
mStringFilterList = new ArrayList(tickets);
this.selectedDate = selectedDate;
Anton = Typeface.createFromAsset(context.getAssets(), "fonts/Anton.ttf");
}
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
RelativeLayout rlContainer;
TextView tvId;
CheckBox chkTicket;
TextView tvCode;
TextView tvFullname;
TextView tvPhone;
TextView tvDestination;
TextView tvClass;
TextView tvFare;
TextView tvSeatNo;
TextView tvDepartureDate;
TextView tvCreatedAt;
// each data item is just a string in this case
public ViewHolder(View view) {
super(view);
rlContainer = (RelativeLayout) view.findViewById(R.id.row_reserved_tickets_ll_container);
tvId = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_id);
chkTicket = (CheckBox) view.findViewById(R.id.row_reserved_tickets_chk_ticket);
tvCode = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_code);
tvFullname = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_customer);
tvPhone = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_phone);
tvDestination = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_to);
tvClass = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_class);
tvFare = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_fare);
tvSeatNo = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_seat_no);
tvDepartureDate = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_departure_date);
tvCreatedAt = (TextView) view.findViewById(R.id.row_reserved_tickets_tv_created_at);
}
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_reserved_tickets, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
mHolder = holder;
mTicket = mTickets.get(position);
if (altColour == 0) {
holder.rlContainer.setBackgroundColor(Color.parseColor("#FFFFFF"));
altColour = 1;
} else {
holder.rlContainer.setBackgroundColor(Color.parseColor("#EFEFEF"));
altColour = 0;
}
holder.chkTicket.setTag(String.valueOf(position));
holder.tvId.setText(String.valueOf(mTicket.getId()));
if (mTicket.isSelected()) {
holder.chkTicket.setChecked(true);
} else {
holder.chkTicket.setChecked(false);
}
holder.chkTicket.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = Integer.parseInt(buttonView.getTag().toString()); // Here we get the position that we have set for the checkbox using setTag.
mTickets.get(getPosition).setSelected(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
}
});
holder.chkTicket.setFocusable(false);
holder.chkTicket.setClickable(false);
holder.tvCode.setText(mTicket.getTicketCode());
holder.tvFullname.setText(mTicket.getFullname());
holder.tvPhone.setText(mTicket.getPhone());
holder.tvDestination.setText(mTicket.getTo());
holder.tvClass.setText(mTicket.getClass_());
holder.tvFare.setText("$ "+mTicket.getFare());
holder.tvSeatNo.setText(String.valueOf(mTicket.getSeatNo()));
holder.tvSeatNo.setBackgroundColor(ContextCompat.getColor(mContext, R.color.colorPrimary));
holder.tvSeatNo.setTextColor(ContextCompat.getColor(mContext, android.R.color.white));
holder.tvDepartureDate.setText(Utils.formatDate(mTicket.getDepartureDate(), "yyyy-MM-dd hh:mm:ss", "hh:mm a"));
holder.tvCreatedAt.setText(mTicket.getCreated_at());
}
@Override
public int getItemCount() {
if (mTickets == null) {
return 0;
}
return mTickets.size();
}
@Override
public Filter getFilter() {
if(mValueFilter == null) {
mValueFilter = new ValueFilter();
}
return mValueFilter;
}
public void remove(TicketModel ticket) {
mTickets.remove(ticket);
}
private class ValueFilter extends Filter {
//Invoked in a worker thread to filter the data according to the constraint.
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
ArrayList<TicketModel> filterList = new ArrayList<>();
if(constraint != null && constraint.length() > 0){
for(int i=0; i< mStringFilterList.size(); i++)
{
if((mStringFilterList.get(i).getTicketCode()).contains(constraint.toString().toUpperCase())
|| (mStringFilterList.get(i).getFullname()).contains(constraint.toString())
|| (mStringFilterList.get(i).getPhone()).contains(constraint.toString()) ) {
TicketModel ticket = new TicketModel(
mStringFilterList.get(i).getId(),
mStringFilterList.get(i).getFullname(),
mStringFilterList.get(i).getPhone(),
mStringFilterList.get(i).getInvoiceCode(),
mStringFilterList.get(i).getTicketCode(),
mStringFilterList.get(i).getClass_(),
mStringFilterList.get(i).getDescription(),
mStringFilterList.get(i).getFrom(),
mStringFilterList.get(i).getTo(),
mStringFilterList.get(i).getFare(),
mStringFilterList.get(i).getSeatNo(),
mStringFilterList.get(i).getBusNo(),
mStringFilterList.get(i).getDepartureDate(),
mStringFilterList.get(i).getPrintedAt(),
mStringFilterList.get(i).getCreated_at()
);
filterList.add(ticket);
}
}
results.count = filterList.size();
results.values = filterList;
} else{
results.count = mStringFilterList.size();
results.values = mStringFilterList;
}
return results;
}
//Invoked in the UI thread to publish the filtering results in the user interface.
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
mTickets.clear();
mTickets.addAll((ArrayList<TicketModel>) results.values);
if (mFilterListener != null) {
mFilterListener.filteringFinished(mTickets);
}
if (results.count > 0) {
notifyDataSetChanged();
} else {
//notifyDataSetInvalidated();
}
}
}
public void setFilterListener(iTicketsFilterListener filterFinishedListener)
{
mFilterListener = filterFinishedListener;
}
private View.OnClickListener lvTicketsOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mTicket != null) {
if (mTicket.getBusNo().equals("")) {
if (mHolder.chkTicket.isChecked()) {
mHolder.chkTicket.setChecked(false);
mTicket.setSelected(true);
remove(mTicket);
} else {
mHolder.chkTicket.setChecked(true);
mTicket.setSelected(false);
//mSelectedTickets.add(mTickets.get(position - 1));
}
} else {
Toast.makeText(mContext, "Not allowed: Schedule has not been assigned to a bus!", Toast.LENGTH_LONG).show();
}
}
}
};
}
我的fragment类中的代码获取数据并将其加载到视图中：
private void loadTicketsIntoView() {
if (mRoute != null) {
sflTickets.setRefreshing(false);
Utils.showProgress(getContext(), lvTickets, pbTickets, true);
tvMessage.setVisibility(View.GONE);
Response.Listener<JSONArray> onSuccessListener = new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
// Get schedule data
mTickets = new ArrayList<>();
mTicketsJson = response;
for (int c = 0; c < response.length(); c++) {
JSONObject schedule = null;
try {
schedule = response.getJSONObject(c);
mTickets.add(new TicketModel(
schedule.getInt("id"),
schedule.optString("fullname"),
schedule.optString("phone"),
schedule.getString("invoice_code"),
schedule.getString("ticket_code"),
schedule.getString("class"),
schedule.getString("description"),
schedule.getString("from"),
schedule.getString("to"),
schedule.getDouble("fare"),
schedule.getInt("seat_no"),
schedule.optString("bus_no"),
schedule.getString("departure_date"),
schedule.optString("printed_at"),
schedule.getString("created_at")
));
} catch (JSONException e) {
e.printStackTrace();
}
}
// Initialising and loading data into adapter
mTicketsAdapter = new ReservedTicketsArrayAdapter(mSelectedDate, getContext(), mTickets, mTwoPane);
lvTickets.setAdapter(mTicketsAdapter);
if (mTickets.size() < 1) {
tvMessage.setVisibility(View.VISIBLE);
} else {
tvMessage.setVisibility(View.GONE);
}
// Hide progress icon
Utils.showProgress(getContext(), lvTickets, pbTickets, false);
}
};
Response.ErrorListener onErrorListener = new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Utils.showProgress(getContext(), lvTickets, pbTickets, false);
Utils.showNetworkResponse(getContext(), error);
}
};
mTicketsRequest.get(mRoute.getId(), mSelectedDate, onSuccessListener, onErrorListener);
}
}
这是我的片段布局：
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
tools:context="com.example.app.activities.ReservedTicketsFragment">
<EditText
android:id="@+id/fragment_reserved_tickets_et_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="5dp"
android:background="@color/colorPrimary"
android:textColor="@android:color/white"
android:textSize="24sp"
android:textStyle="bold"
android:inputType="date"
android:padding="10dp" />
<ProgressBar
android:id="@+id/fragment_reserved_tickets_pv_tickets"
style="?android:attr/progressBarStyleLarge"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="5dp"
android:layout_centerInParent="true"
android:visibility="gone" />
<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_reserved_tickets_srl_tickets"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/fragment_reserved_tickets_et_date"
android:layout_marginTop="25dp">
<android.support.v7.widget.RecyclerView
android:id="@+id/fragment_reserved_tickets_lv_tickets"
android:background="@color/colorPrimary"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
<TextView
android:id="@+id/fragment_reserved_tickets_tv_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:elevation="5dp"
android:padding="15dp"
android:background="#CCFFFFFF"
android:textColor="@color/colorPrimaryText"
android:text="Choose a Route To Display Available Schedules"/>
</RelativeLayout>
现在我的问题是，当我运行应用程序时，此活动上没有任何显示，我已经确认正在返回数据，日志中没有显示任何错误，RecyclerView只是空白。
答案 0 :(得分：1)
您尚未为回收站视图设置布局管理器。在设置适配器之前，在loadTicketsIntoView（）中进行此更改：
LinearLayoutManager linear = new LinearLayoutManager(getActivity());
linear.setOrientation(LinearLayoutManager.VERTICAL);// If you want a vertical recycler view
lvTickets.setLayoutManager(linear);
mTicketsAdapter = new ReservedTicketsArrayAdapter(mSelectedDate, getContext(), mTickets, mTwoPane);
lvTickets.setAdapter(mTicketsAdapter);
希望这能解决您的问题！
答案 1 :(得分：0)
您已设置recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()))？