How to parse an xml to java class with recycler view or in adapter of recyclerview

Question

I have an xml file which name it is Bookmark and it is into the xml folder. I want to parse xml to recycler view which I can show the list of the Bookmark in recycler view.

Answer 1

You can use this library to parse XML into your POJO file. parsing can be done in your Fragment.

Answer 2

UPDATE 2

FragmentBookmark

public class FragmentBookmark extends Fragment {


    public FragmentBookmark() {
        // Required empty public constructor
    }

    private Context mContext;
    ArrayList<Bookmark> arrayList = new ArrayList<>();
    XmlPullParserFactory pullParserFactory;

    RecyclerView myRecyclerView;
    DataAdapter dataAdapter;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        mContext = context;
    }

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


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

        myRecyclerView = rootView.findViewById(R.id.myRecyclerView);
        myRecyclerView.setLayoutManager(new LinearLayoutManager(mContext));
        myRecyclerView.setHasFixedSize(true);

        dataAdapter = new DataAdapter(mContext, arrayList);
        myRecyclerView.setAdapter(dataAdapter);

        try {

            XmlPullParser xpp = getResources().getXml(R.xml.bookmarks);

            while (xpp.getEventType() != XmlPullParser.END_DOCUMENT) {
                if (xpp.getEventType() == XmlPullParser.START_TAG) {
                    if (xpp.getName().equals("Bookmark")) {

                        Log.e("MY_VALUE", " * " + xpp.getAttributeValue(0) + " * ");
                        Log.e("MY_VALUE", " * " + xpp.getAttributeValue(1) + " * ");
                        Log.e("MY_VALUE", " * " + xpp.getAttributeValue(5) + " * ");
                        Log.e("MY_VALUE", " * " + xpp.getAttributeValue(2) + " * ");
                        Log.e("MY_VALUE", " * " + xpp.getAttributeValue(3) + " * ");
                        Log.e("MY_VALUE", " * " + xpp.getAttributeValue(4) + " * ");


                        Bookmark bookmark = new Bookmark();
                        bookmark.setName(xpp.getAttributeValue(0));

                        int drawableResourceId = this.getResources().getIdentifier(xpp.getAttributeValue(1), "drawable", mContext.getPackageName());
                        bookmark.setIcon(drawableResourceId);

                        bookmark.setId(xpp.getAttributeValue(2));

                        bookmark.setSearchUrl(xpp.getAttributeValue(3));
                        bookmark.setNativeUrl(xpp.getAttributeValue(4));
                        arrayList.add(bookmark);

                    }
                }

                xpp.next();
            }
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        dataAdapter.notifyDataSetChanged();
        return rootView;
    }

}

layout.fragment_bookmark

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/myRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</RelativeLayout>

DataAdapter

public class DataAdapter  extends RecyclerView.Adapter<DataAdapter.ViewHolder> {

    private Context context;
    ArrayList<Bookmark> arrayList = new ArrayList<>();

    public DataAdapter(Context context, ArrayList<Bookmark> arrayList) {
        this.context = context;
        this.arrayList = arrayList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {

        View view=LayoutInflater.from(context).inflate(R.layout.custom_layout,parent,false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

        holder.tvName.setText(arrayList.get(position).getName());

        holder.tvIcon.setImageResource(arrayList.get(position).getIcon());

        holder.tvId.setText(arrayList.get(position).getId());
        holder.tvSearchUrl.setText(arrayList.get(position).getSearchUrl());
        holder.tvNativeUrl.setText(arrayList.get(position).getNativeUrl());
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {

        TextView tvName,tvId,tvSearchUrl,tvNativeUrl;

        ImageView tvIcon;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);

            tvName=itemView.findViewById(R.id.tvName);
            tvIcon=itemView.findViewById(R.id.tvIcon);
            tvId=itemView.findViewById(R.id.tvId);
            tvSearchUrl=itemView.findViewById(R.id.tvSearchUrl);
            tvNativeUrl=itemView.findViewById(R.id.tvNativeUrl);
        }
    }
}

layout.custom_layout

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:cardCornerRadius="15dp"
    app:cardElevation="5dp"
    app:cardUseCompatPadding="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="Name  : " />

            <TextView
                android:id="@+id/tvName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="Icon  : " />

            <ImageView
                android:id="@+id/tvIcon"
                android:layout_width="20dp"
                android:layout_height="20dp"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="Id  : " />

            <TextView
                android:id="@+id/tvId"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="SearchUrl  : " />

            <TextView
                android:id="@+id/tvSearchUrl"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="NativeUrl  : " />

            <TextView
                android:id="@+id/tvNativeUrl"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

    </LinearLayout>

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

Bookmark model class

public class Bookmark
{
    String name,id,nativeUrl,searchUrl;
    int icon;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public int getIcon() {
        return icon;
    }

    public void setIcon(int icon) {
        this.icon = icon;
    }

    public String getNativeUrl() {
        return nativeUrl;
    }

    public void setNativeUrl(String nativeUrl) {
        this.nativeUrl = nativeUrl;
    }

    public String getSearchUrl() {
        return searchUrl;
    }

    public void setSearchUrl(String searchUrl) {
        this.searchUrl = searchUrl;
    }

    @Override
    public String toString() {
        return "Bookmark{" +
                "name='" + name + '\'' +
                ", icon='" + icon + '\'' +
                ", id='" + id + '\'' +
                ", nativeUrl='" + nativeUrl + '\'' +
                ", searchUrl='" + searchUrl + '\'' +
                '}';
    }
}

UPDATE

XML FILE

<Bookmarks>
    <Bookmark
        name="Google"
        hidden="true"
        icon="google.png"
        id="1"
        nativeUrl=""
        searchUrl="https://www.google.com" />
    <Bookmark
        name="Youtube"
        hidden=""
        icon="youtube_new.png"
        id="2"
        nativeUrl=""
        searchUrl="http://m.youtube.com" />
    <Bookmark
        name="Facebook"
        hidden=""
        icon="facebook.png"
        id="3"
        nativeUrl="facebook://"
        searchUrl="https://m.facebook.com" />
    <Bookmark
        name="Twitter"
        hidden=""
        icon="twitter.png"
        id="4"
        nativeUrl=""
        searchUrl="https://mobile.twitte.com" />
    <Bookmark
        name="Instagram"
        hidden=""
        icon="instagram.png"
        id="5"
        nativeUrl="instagram://"
        searchUrl="https:instagram.com" />
    <Bookmark
        name="Gmail"
        hidden=""
        icon="gmail.png"
        id="6"
        nativeUrl="googlemail://"
        searchUrl="https://gmail.com" />
    <Bookmark
        name="Translate"
        hidden=""
        icon="google_translate.png"
        id="7"
        nativeUrl=""
        searchUrl="https://" />

</Bookmarks>

Here is the code to parse XML from res/XML folder

    try {

        XmlPullParser xpp = getResources().getXml(R.xml.bookmarks);

        while (xpp.getEventType() != XmlPullParser.END_DOCUMENT) {
            if (xpp.getEventType() == XmlPullParser.START_TAG) {
                if (xpp.getName().equals("Bookmark")) {

                    Log.e("MY_VALUE", " * " + xpp.getAttributeValue(0) + " * ");
                    Log.e("MY_VALUE", " * " + xpp.getAttributeValue(1) + " * ");
                    Log.e("MY_VALUE", " * " + xpp.getAttributeValue(5) + " * ");
                    Log.e("MY_VALUE", " * " + xpp.getAttributeValue(2) + " * ");
                    Log.e("MY_VALUE", " * " + xpp.getAttributeValue(3) + " * ");
                    Log.e("MY_VALUE", " * " + xpp.getAttributeValue(4) + " * ");

                    Bookmark bookmark = new Bookmark();
                    bookmark.setName(xpp.getAttributeValue(0));
                    bookmark.setIcon(xpp.getAttributeValue(1));
                    bookmark.setId(xpp.getAttributeValue(2));
                    bookmark.setSearchUrl(xpp.getAttributeValue(3));
                    bookmark.setNativeUrl(xpp.getAttributeValue(4));
                    arrayList.add(bookmark);

                }
            }

            xpp.next();
        }
    } catch (XmlPullParserException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

There are three types of android XML parser that we can use.

• SAX Parsers

• DOM Parsers

• XMLPullParser

You can use XmlPullParserFactory to parse your xml

Try this here is the working code

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ArrayList<Bookmark> arrayList = new ArrayList<>();
    XmlPullParserFactory pullParserFactory;

    RecyclerView myRecyclerView;
    DataAdapter dataAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myRecyclerView = findViewById(R.id.myRecyclerView);
        myRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        myRecyclerView.setHasFixedSize(true);
        try {
            pullParserFactory = XmlPullParserFactory.newInstance();
            XmlPullParser parser = pullParserFactory.newPullParser();

            InputStream in_s = getApplicationContext().getAssets().open("bookmark.xml");
            parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
            parser.setInput(in_s, null);

            parseXML(parser);

        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        for (int i = 0; i < arrayList.size(); i++) {
            Log.e("OUTPUT", arrayList.get(i).toString());
        }

        dataAdapter = new DataAdapter(this, arrayList);
        myRecyclerView.setAdapter(dataAdapter);
    }

    private void parseXML(XmlPullParser parser) throws XmlPullParserException, IOException {
        ArrayList<Bookmark> countries = null;
        int eventType = parser.getEventType();
        Bookmark country = null;

        while (eventType != XmlPullParser.END_DOCUMENT) {
            String name;
            name = parser.getName();
            switch (eventType) {
                case XmlPullParser.START_DOCUMENT:
                    countries = new ArrayList();
                    break;
                case XmlPullParser.START_TAG:
                    break;

                case XmlPullParser.END_TAG:
                    if (name.equals("Bookmark")) {
                        Log.e("VALUE", parser.getAttributeValue(null, "name") + "");
                        Log.e("VALUE", parser.getAttributeValue(null, "icon") + "");
                        Log.e("VALUE", parser.getAttributeValue(null, "id") + "");
                        Log.e("VALUE", parser.getAttributeValue(null, "searchUrl") + "");
                        Log.e("VALUE", parser.getAttributeValue(null, "nativeUrl") + "");

                        Bookmark bookmark = new Bookmark();
                        bookmark.setName(parser.getAttributeValue(null, "name"));
                        bookmark.setIcon(parser.getAttributeValue(null, "icon"));
                        bookmark.setId(parser.getAttributeValue(null, "id"));
                        bookmark.setSearchUrl(parser.getAttributeValue(null, "searchUrl"));
                        bookmark.setNativeUrl(parser.getAttributeValue(null, "nativeUrl"));
                        arrayList.add(bookmark);
                    }
                    break;
            }
            eventType = parser.next();
        }


    }

    private void processParsing(XmlPullParser parser) throws IOException, XmlPullParserException {
        int eventType = parser.getEventType();
        Bookmark bookmark = null;


    }
}

layout.activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/myRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</RelativeLayout>

DataAdapter

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;

public class DataAdapter  extends RecyclerView.Adapter<DataAdapter.ViewHolder> {

    private Context context;
    ArrayList<Bookmark> arrayList = new ArrayList<>();

    public DataAdapter(Context context, ArrayList<Bookmark> arrayList) {
        this.context = context;
        this.arrayList = arrayList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {

        View view=LayoutInflater.from(context).inflate(R.layout.custom_layout,parent,false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

        holder.tvName.setText(arrayList.get(position).getName());
        holder.tvIcon.setText(arrayList.get(position).getIcon());
        holder.tvId.setText(arrayList.get(position).getId());
        holder.tvSearchUrl.setText(arrayList.get(position).getSearchUrl());
        holder.tvNativeUrl.setText(arrayList.get(position).getNativeUrl());
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {

        TextView tvName,tvIcon,tvId,tvSearchUrl,tvNativeUrl;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);

            tvName=itemView.findViewById(R.id.tvName);
            tvIcon=itemView.findViewById(R.id.tvIcon);
            tvId=itemView.findViewById(R.id.tvId);
            tvSearchUrl=itemView.findViewById(R.id.tvSearchUrl);
            tvNativeUrl=itemView.findViewById(R.id.tvNativeUrl);
        }
    }
}

layout.custom_layout

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:cardCornerRadius="15dp"
    app:cardElevation="5dp"
    app:cardUseCompatPadding="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="Name  : " />

            <TextView
                android:id="@+id/tvName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="Icon  : " />

            <TextView
                android:id="@+id/tvIcon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="Id  : " />

            <TextView
                android:id="@+id/tvId"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="SearchUrl  : " />

            <TextView
                android:id="@+id/tvSearchUrl"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="NativeUrl  : " />

            <TextView
                android:id="@+id/tvNativeUrl"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="" />

        </LinearLayout>

    </LinearLayout>

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

Bookmark model class

public class Bookmark
{
    String name,icon,id,nativeUrl,searchUrl;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getIcon() {
        return icon;
    }

    public void setIcon(String icon) {
        this.icon = icon;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getNativeUrl() {
        return nativeUrl;
    }

    public void setNativeUrl(String nativeUrl) {
        this.nativeUrl = nativeUrl;
    }

    public String getSearchUrl() {
        return searchUrl;
    }

    public void setSearchUrl(String searchUrl) {
        this.searchUrl = searchUrl;
    }

    @Override
    public String toString() {
        return "Bookmark{" +
                "name='" + name + '\'' +
                ", icon='" + icon + '\'' +
                ", id='" + id + '\'' +
                ", nativeUrl='" + nativeUrl + '\'' +
                ", searchUrl='" + searchUrl + '\'' +
                '}';
    }
}

for more information please check below post

• Android - XML Parser
• Android XML Parser – XMLPullParser
• How to read XML File in Java (DOM Parser)
• Java SAX Parser Example
• Parsing XML data in Android Apps
• Android XML Parsing using DOM Parser
• Android XML Parsing Tutorial
• Learning to Parse XML Data in Your Android App

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