Listview Pagination in android

Question

I have a listview where I have 50 elements being displayed. I have decided to paginate the view so on each part of the view there are 10 elements and then a next button is c

Answer 1

Below is my code to show list view with pagination. There is two blue button for change pages.

You can customize according to you need.

Create UserCategory.java

    package com.UserCategory;
import java.net.URL;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;

public class UserCategory extends Activity implements OnClickListener{
private final int PAGE_SIZE = 5;
private int StartingIndex = 0;
ArrayList userClass=new ArrayList();
int textlength=0;

private String lv_arr[];
private ListView lv1;
EditText searchText;

//Button Previous;

private String Machine[]={"Machine 1","Machine 2","Machine 3","Machine 4","Machine 5","Machine 6","Machine 7","Machine 8","Machine 9","Machine 10","Machine 11","Machine 12","Machine 1","Machine 2","Machine 3","Machine 4","Machine 5","Machine 6","Machine 7","Machine 8","Machine 9","Machine 10","Machine 11","Machine 12"};
ImageView next,Previous;

@Override        
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
      this.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
      setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        setContentView(R.layout.main);
        lv1=(ListView)findViewById(R.id.ListView01);
        searchText=(EditText)findViewById(R.id.et_Serchlist);
        next=(ImageView)findViewById(R.id.btn_next);
        Previous=(ImageView)findViewById(R.id.btn_previous);
        next.setOnClickListener(this);
        Previous.setOnClickListener(this);       
     //parsing();
    lv1.setAdapter(new ArrayAdapter(this,android.R.layout.simple_list_item_1 , Machine));
    changeListViewModel(0);


   }
private void changelist(int startingIndex) {

    if(startingIndex < 0) {
        Previous=(ImageView)findViewById(R.id.btn_previous);
        ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
        back.setVisibility(1);
        Previous.setVisibility(4);
        startingIndex = 0;
    }else if(startingIndex >= userClass.size())
        startingIndex -= PAGE_SIZE;
    StartingIndex   = startingIndex;
    int endingIndex = startingIndex + PAGE_SIZE;

    System.out.println("ending index"+endingIndex);
    if(StartingIndex!=0){
        Previous=(ImageView)findViewById(R.id.btn_previous);
        ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
        back.setVisibility(4);
        Previous.setVisibility(1);


    }
    if(endingIndex == userClass.size()){
        ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
        Forward.setVisibility(1);
         next=(ImageView)findViewById(R.id.btn_next);
         next.setVisibility(4);
    }
    if(endingIndex != userClass.size()){
        ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
        Forward.setVisibility(4);
         next=(ImageView)findViewById(R.id.btn_next);
         next.setVisibility(1);
    }
    if(endingIndex > userClass.size()) endingIndex = userClass.size();
    try {

        String[] subSet = getDataSubset1(startingIndex, endingIndex);
        System.out.println("subSet array"+subSet);
        lv1.setAdapter(new ArrayAdapter(this,android.R.layout.simple_list_item_1 , subSet));

    } catch (Exception e) {
        e.printStackTrace();
    }
}
private String[] getDataSubset1(int startingIndex, int endingIndex){
    String[] changeList = new String[endingIndex - startingIndex];
    int index = -1;
    for(int x = startingIndex; x < endingIndex; x++)

        changeList[++index] = userClass.get(x);


    return changeList;

}

private void changeListViewModel(int startingIndex){

    if(startingIndex < 0) {
        Previous=(ImageView)findViewById(R.id.btn_previous);
        ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
        back.setVisibility(1);
        Previous.setVisibility(4);
        startingIndex = 0;
    }

    else if(startingIndex >= Machine.length){

        startingIndex -= PAGE_SIZE;
    }
        System.out.println("strating"+startingIndex);

    System.out.println("startingIndex"+startingIndex);
    StartingIndex   = startingIndex;
    int endingIndex = startingIndex + PAGE_SIZE;
    System.out.println("endingIndex"+endingIndex);
     if(StartingIndex!=0)
     {
        Previous=(ImageView)findViewById(R.id.btn_previous);
        ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
        back.setVisibility(4);
        Previous.setVisibility(1);
        }
     if(endingIndex == userClass.size()){
            ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
            Forward.setVisibility(1);
             next=(ImageView)findViewById(R.id.btn_next);
             next.setVisibility(4);
        }
     if(endingIndex != userClass.size()){
            ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
            Forward.setVisibility(4);
             next=(ImageView)findViewById(R.id.btn_next);
             next.setVisibility(1);
        }
    System.out.println("ending index"+endingIndex);
    if(endingIndex > Machine.length) {

        endingIndex = Machine.length;
        ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
        Forward.setVisibility(1);
         next=(ImageView)findViewById(R.id.btn_next);
         next.setVisibility(4);
    }


    String[] subSet = getDataSubset(startingIndex, endingIndex);
    System.out.println("subSet main array"+subSet.length);
    lv1.setAdapter(new ArrayAdapter(this,android.R.layout.simple_list_item_1 , subSet));
}

private String[] getDataSubset(int startingIndex, int endingIndex){
    String[] toRet = new String[endingIndex - startingIndex];
    int index = -1;
    System.out.println("index"+index);
    for(int x = startingIndex; x < endingIndex; x++)
        toRet[++index] = Machine[x];

    return toRet;

}
private void parsing() {
    // TODO Auto-generated method stub
    try {

        URL url = new URL("http://10.10.1.100/DogEventsWebService/EventService.svc/categories/1");
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(new InputSource(url.openStream()));
        doc.getDocumentElement().normalize();

        NodeList nodeList = doc.getElementsByTagName("UserCategory");
        Machine = new String[nodeList.getLength()];


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

            Node node = nodeList.item(i);
            Machine[i] = new String();

            Element fstElmnt = (Element) node;
            NodeList nameList = fstElmnt.getElementsByTagName("ClassDescription");
            Element nameElement = (Element) nameList.item(0);
            nameList = nameElement.getChildNodes();
            Machine[i]=((Node) nameList.item(0)).getNodeValue();
         }

        System.out.println("after for loop Machine"+Machine);

    } catch (Exception e) {
        System.out.println("XML Pasing Excpetion = " + e);
    }
}
@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {
    case R.id.btn_next:

        textlength=searchText.getText().length();
        System.out.println("nextbutton"+textlength);
        if(textlength==0){
            changeListViewModel(StartingIndex + PAGE_SIZE);
        }else{
            changelist(StartingIndex + PAGE_SIZE);
            }

        break;
    case R.id.btn_previous:
        textlength=searchText.getText().length();
        if(textlength==0){
        changeListViewModel(StartingIndex - PAGE_SIZE);
        }else{
        changelist(StartingIndex - PAGE_SIZE);
        }
         break;
        default:
        break;
     }
}

}

create main.xml:

Create userlist.xml

Add my_border.xml into Drawable folder:

![enter image description here][1]

If it give error for iamges then use any other images and run application.

Let me know it work for you.

Thanks