Question

我的Recycler视图有2个按钮：REnew和Return。两者都不起作用。

了解Recycler视图无法实现onclick，因此我在Adapter中实现了相同的功能。在适配器中 - 我添加了一个toast msg来测试是否捕获了onclick按钮，它没有显示。

任何人都可以提出建议，原因是什么？如果您需要查看更多代码，请与我们联系。

非常感谢。

BookListMyAccAdapter.java

package com.androidatc.customviewindrawer;

import android.app.Activity;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.TextHttpResponseHandler;

import java.util.List;

import cz.msebera.android.httpclient.Header;

public class BookListMyAccAdapter extends RecyclerView.Adapter<BookListMyAccAdapter.PersonViewHolder> {

    public static class PersonViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        CardView cv;
        TextView title;
        TextView dueDt;

        //        ImageView personPhoto;
        public Button searchBtn, renewBtn, returnBtn;

        PersonViewHolder(View itemView) {
            super(itemView);

`itemView.setOnClickListener（this）; cv =（CardView）itemView.findViewById（R.id.cv）; title =（TextView）itemView.findViewById（R.id.title）; dueDt =（TextView）itemView.findViewById（R.id.dueDate）; // personPhoto =（ImageView）itemView.findViewById（R.id.person_photo）; renewBtn =（Button）itemView.findViewById（R.id.renew_button）; returnBtn =（Button）itemView.findViewById（R.id.checkin_button）; }

        @Override
            public void onClick(View v) {
                switch (v.getId()) {
                    case R.id.checkin_button:
                        String barCode = null, patronId = null;
                        Log.d("TAG", "Success");
                        Toast.makeText(myActivity.getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();
                        returnBook(barCode, patronId);
                        break;

                    case R.id.renew_button:
                        barCode = null;
                        patronId = null;
                        Log.d("TAG", "Success");
                        Toast.makeText(myActivity.getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();
                        renewBook(barCode, patronId);
                        break;
                }
        }}

        List<Books> books;
    public static Activity myActivity;


        BookListMyAccAdapter(List<Books> books, Activity myActivity) {
            this.books = books;
            this.myActivity = myActivity;
        }

        @Override
        public void onAttachedToRecyclerView(RecyclerView recyclerView) {
            super.onAttachedToRecyclerView(recyclerView);
        }

        @Override
        public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
            View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_my_acc, viewGroup, false);
            PersonViewHolder pvh = new PersonViewHolder(v);
            return pvh;
        }

        @Override
        public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
            personViewHolder.title.setText(books.get(i).title);
            personViewHolder.dueDt.setText(books.get(i).dueOn);
//        personViewHolder.personPhoto.setImageResource(books.get(i).photoId);
        }

        @Override
        public int getItemCount() {
            return books.size();
        }

        public static void renewBook(String barCode, String patronId) {
            final int DEFAULT_TIMEOUT = 200000 * 1000000000;

            try {
                // Make RESTful webservice call using AsyncHttpClient object
                AsyncHttpClient client = new AsyncHttpClient();
                client.setTimeout(DEFAULT_TIMEOUT);

//                progress.setMessage("Please Wait...");
//                progress.setIndeterminate(false);
//                progress.setCancelable(false);
//                progress.show();

                RequestParams params = new RequestParams();
                params.put("barcode", "B1246855");
                params.put("patron", "thida");

                Toast.makeText(myActivity.getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();

                client.post(" htt=1", new TextHttpResponseHandler() {
                            @Override
                            public void onSuccess(int i, Header[] headers, String response) {
//                                Toast.makeText(getActivity().getApplicationContext(), "Response: " + response, Toast.LENGTH_LONG).show();
                                Log.d("TAG", "Success");
                            }

                            @Override
                            public void onFailure(int statusCode, Header[] headers, String response, Throwable error) {
//                                Toast.makeText(getActivity().getApplicationContext(), "Status code :" + statusCode + "errmsg : " + error.getMessage(), Toast.LENGTH_LONG).show();
//                                Toast.makeText(getActivity().getApplicationContext(), "Unexpected Error occcured! [Most common Error: Device might not be connected to Internet or remote server is not up and running]", Toast.LENGTH_LONG).show();
                                Log.d("TAG", "Failure");
                            }

                        }
                );
            } catch (Exception e) {
                e.printStackTrace();
//                Toast.makeText(getActivity().getApplicationContext(), "Exception Caught", Toast.LENGTH_LONG).show();
            }

//            progress.dismiss();
//            Toast.makeText(getActivity().getApplicationContext(), "After calling webservice", Toast.LENGTH_LONG).show();
        }


        public static void returnBook(String barCode, String patronId) {
            final int DEFAULT_TIMEOUT = 200000 * 1000000000;

            try {
                // Make RESTful webservice call using AsyncHttpClient object
                AsyncHttpClient client = new AsyncHttpClient();
                client.setTimeout(DEFAULT_TIMEOUT);

//                progress.setMessage("Please Wait...");
//                progress.setIndeterminate(false);
//                progress.setCancelable(false);
//                progress.show();

                RequestParams params = new RequestParams();
                params.put("barcode", "B1246855");
                params.put("patron", "thida");

//                Toast.makeText(getActivity().getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();

                client.post("http://43.246855", new AsyncHttpResponseHandler() {
                            //                http://koha-dev.cvpl.com
                            @Override
                            public void onSuccess(int i, Header[] headers, byte[] bytes) {
//                                Toast.makeText(getActivity().getApplicationContext(), "Response: " + headers, Toast.LENGTH_LONG).show();
                                Log.d("TAG", "Success");
                            }

                            @Override
                            public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {
//                                Toast.makeText(getActivity().getApplicationContext(), "Status code :" + headers + "errmsg : " + throwable.getMessage(), Toast.LENGTH_LONG).show();
//                                Toast.makeText(getActivity().getApplicationContext(), "Unexpected Error occcured! [Most common Error: Device might not be connected to Internet or remote server is not up and running]", Toast.LENGTH_LONG).show();
                                Log.d("TAG", "Failure");
                            }

                        }

                );
            } catch (Exception e) {
                e.printStackTrace();
//                Toast.makeText(getActivity().getApplicationContext(), "Exception Caught", Toast.LENGTH_LONG).show();
            }

//            progress.dismiss();
//            Toast.makeText(getActivity().getApplicationContext(), "After calling webservice", Toast.LENGTH_LONG).show();
        }
    }

RecyclerMyAccFrag.java

package com.androidatc.customviewindrawer;

import android.app.Fragment;
import android.app.ProgressDialog;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.TextHttpResponseHandler;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import cz.msebera.android.httpclient.Header;

public class RecyclerMyAccFrag extends Fragment
//        implements View.OnClickListener
{

    public List<Books> books;
    public RecyclerView rv;
    public TextView formatTxt, contentTxt, TitleTxt, PublisherTxt, CreatorTxt, AvailabiltyTxt;
    public Button searchBtn,renewBtn, returnBtn;
    ProgressDialog progress;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.recycler_my_acc, container, false);


//        renewBtn = (Button) rootView.findViewById(R.id.renew_button);
//        returnBtn = (Button) rootView.findViewById(R.id.checkin_button);

//        renewBtn.setOnClickListener(this);
//        returnBtn.setOnClickListener(this);
        String response =getArguments().getString("book_xml");

        rv=(RecyclerView)rootView.findViewById(R.id.rv);

        LinearLayoutManager llm = new LinearLayoutManager(getActivity());
        rv.setLayoutManager(llm);
        rv.setHasFixedSize(true);

//        progress = new ProgressDialog(getActivity());

        readDetails(response);
        initializeAdapter();

        return rootView;
    }


    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        public void onFragmentInteraction(Uri uri);
    }


    public void initializeData(String[] titles, String [] dueDts, int total){
        books = new ArrayList<>();

        for(int i = 0;i<total;i++)
        {
            books.add(new Books(titles[i], dueDts[i]));
//            Toast.makeText(getActivity().getApplicationContext(), "Title : " + i +
//                    " " + titles[i] + " Due Date: " + dueDts[i], Toast.LENGTH_LONG).show();
        }
        Toast.makeText(getActivity().getApplicationContext(), "Total Number of Books Found:"
                + total , Toast.LENGTH_LONG).show();
    }

    public void initializeAdapter(){
        BookListMyAccAdapter adapter = new BookListMyAccAdapter(books, getActivity());
        rv.setAdapter(adapter);
    }

// parse XML
    public void readDetails(String response) {
        DocumentBuilder builder = null;

        try {
            builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
            InputSource src = new InputSource();

            src.setCharacterStream(new StringReader(response));
            Document doc = builder.parse(src);

//            NodeList nodes1 = doc.getElementsByTagName("title");
            src.setCharacterStream(new StringReader(response));

           NodeList nodes = doc.getElementsByTagName("date_due_sql");

            int cnt = 0;
//            String[] titles1 = new String[10000];
            String[] titles = new String[10000];
            String[] dueDts = new String[10000];

            for (int i = 0; i < nodes.getLength(); i++) {

                if (nodes.item(i).getTextContent() == "title") {
//                    titles1[i] = doc.getElementsByTagName("title").item(0).getTextContent();

                }

                if (nodes.item(i).getTextContent().trim().isEmpty()) {
                    cnt++;
                }

            }
            Log.e("TAGLOG", "" + cnt);
            for (int i = 0; i < nodes.getLength(); i++) {
                    titles[i] = doc.getElementsByTagName("title").item(i).getTextContent();
                    dueDts[i] = doc.getElementsByTagName("date_due_sql").item(i).getTextContent();
            }

              initializeData(titles, dueDts, nodes.getLength());

//            Toast.makeText(getActivity().getApplicationContext(), "Total Number of Books Found:"
//                    + nodes1.getLength() + " " + titles[0], Toast.LENGTH_LONG).show();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(getActivity().getApplicationContext(), "No Book Found", Toast.LENGTH_LONG).show();
        } finally {

        }
    }


    public void renewBook(String barCode, String patronId)
    {
        final int DEFAULT_TIMEOUT = 200000 * 1000000000;

        try {
            // Make RESTful webservice call using AsyncHttpClient object
            AsyncHttpClient client = new AsyncHttpClient();
            client.setTimeout(DEFAULT_TIMEOUT);

            progress.setMessage("Please Wait...");
            progress.setIndeterminate(false);
            progress.setCancelable(false);
            progress.show();

            RequestParams params = new RequestParams();
            params.put("barcode", "B1246855");
            params.put("patron", "thida");

            Toast.makeText(getActivity().getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();

            client.post(" http://koha-ded=1", new TextHttpResponseHandler() {
                        @Override
                        public void onSuccess(int i, Header[] headers, String response) {
                            Toast.makeText(getActivity().getApplicationContext(), "Response: " + response, Toast.LENGTH_LONG).show();
                            Log.d("TAG", "Success");
                        }

                        @Override
                        public void onFailure(int statusCode, Header[] headers, String response, Throwable error) {
                            Toast.makeText(getActivity().getApplicationContext(), "Status code :" + statusCode + "errmsg : " + error.getMessage(), Toast.LENGTH_LONG).show();
                            Toast.makeText(getActivity().getApplicationContext(), "Unexpected Error occcured! [Most common Error: Device might not be connected to Internet or remote server is not up and running]", Toast.LENGTH_LONG).show();
                            Log.d("TAG", "Failure");
                        }

                    }
            );
        }
        catch (Exception e)
        {
            e.printStackTrace();
            Toast.makeText(getActivity().getApplicationContext(), "Exception Caught", Toast.LENGTH_LONG).show();
        }

        progress.dismiss();
        Toast.makeText(getActivity().getApplicationContext(), "After calling webservice", Toast.LENGTH_LONG).show();
    }



    public void returnBook(String barCode, String patronId)
    {
        final int DEFAULT_TIMEOUT = 200000 * 1000000000;

        try {
            // Make RESTful webservice call using AsyncHttpClient object
            AsyncHttpClient client = new AsyncHttpClient();
            client.setTimeout(DEFAULT_TIMEOUT);

            progress.setMessage("Please Wait...");
            progress.setIndeterminate(false);
            progress.setCancelable(false);
            progress.show();

            RequestParams params = new RequestParams();
            params.put("barcode", "B1246855");
            params.put("patron", "thida");

            Toast.makeText(getActivity().getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();

            client.post("http:vice46855", new AsyncHttpResponseHandler() {
                        //                http://koha-dev.cvpl.com.sg/cgi-bin/koha/ilsdi.pl?service=RenewLoan&patron_id=1&item_id=1
                        @Override
                        public void onSuccess(int i, Header[] headers, byte[] bytes) {
                            Toast.makeText(getActivity().getApplicationContext(), "Response: " + headers, Toast.LENGTH_LONG).show();
                            Log.d("TAG", "Success");
                        }

                        @Override
                        public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {
                            Toast.makeText(getActivity().getApplicationContext(), "Status code :" + headers + "errmsg : " + throwable.getMessage(), Toast.LENGTH_LONG).show();
                            Toast.makeText(getActivity().getApplicationContext(), "Unexpected Error occcured! [Most common Error: Device might not be connected to Internet or remote server is not up and running]", Toast.LENGTH_LONG).show();
                            Log.d("TAG", "Failure");
                        }

                    }

            );
        }
        catch (Exception e)
        {
            e.printStackTrace();
            Toast.makeText(getActivity().getApplicationContext(), "Exception Caught", Toast.LENGTH_LONG).show();
        }

        progress.dismiss();
        Toast.makeText(getActivity().getApplicationContext(), "After calling webservice", Toast.LENGTH_LONG).show();
    }}

item_my_acc.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/cv"
    >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="16dp"
        >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/title"
            android:layout_gravity="left"
            />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/dueDate"
            android:layout_below="@+id/title"
            />
        <Button
            android:id="@+id/renew_button"
            android:layout_alignParentRight="true"
            android:text="@string/renew"
            android:layout_below="@id/dueDate"
            android:layout_width="90dp"
            android:layout_height="40dp"
            android:layout_gravity="right"/>

        <Button
            android:id="@+id/checkin_button"
            android:layout_alignParentRight="true"
            android:text="@string/checkin"
            android:layout_below="@id/renew_button"
            android:layout_width="90dp"
            android:layout_height="40dp"
            android:layout_gravity="right"/>


    </RelativeLayout>

</android.support.v7.widget.CardView>

Answer 1

目前，您的ViewHolder类正在实现View.OnClickListener。那在这里没有帮助。

相反，您需要在要接收点击次数的各个视图对象上调用setOnClickListener。如果它只是整行，则只需要为该行执行根视图。

Answer 2

我认为您忘记将OnClickListener添加到您的视图中：

public static class PersonViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    CardView cv;
    TextView title;
    TextView dueDt;

    public Button searchBtn, renewBtn, returnBtn;

    PersonViewHolder(View itemView) {
        super(itemView);

        cv = (CardView) itemView.findViewById(R.id.cv);
        title = (TextView) itemView.findViewById(R.id.title);
        dueDt = (TextView) itemView.findViewById(R.id.dueDate);
        renewBtn = (Button) itemView.findViewById(R.id.renew_button);
        returnBtn = (Button) itemView.findViewById(R.id.checkin_button);

        renewBtn.setOnClickListener(this);    // <- This lines
        returnBtn.setOnClickListener(this);   // <- This lines
    }

    (...)

}

适配器上的Onclick按钮不起作用（Recycler视图应用程序）

2 个答案: