How to solve the XML parsing performance issue on Android

Question

I have to read a XML file with about ~4000 lines on Android. First I tried the SimpleXML library because it\'s the easiest and it took about 2 minutes on my HTC Desire. So I

Answer 1

I think the best way to work with XML on Android is use VDT-XML library

My XML file contains more then 60 000 lines and VDT-XML handles it as following:

Nexus 5 : 2055 millisec

Galaxy Note 4 : 2498 milisec

You can find more benchmark reports by link : VTD-XML Benchmark

Short example of XML file

 
        20Fruit
        31Vegetables
        45Rice
        50Potatoes

Configuration of "build.gradle" file

dependencies {
    compile files('libs/vtd-xml.jar')
}

Source code example:

import com.ximpleware.AutoPilot;
import com.ximpleware.VTDGen;
import com.ximpleware.VTDNav;


String fileName = "products.xml";

VTDGen vg = new VTDGen();

if (vg.parseFile(fileName, true)) {

     VTDNav vn = vg.getNav();
     AutoPilot table = new AutoPilot(vn);
     table.selectXPath("database/table");

     while (table.iterate()) {
        String tableName = vn.toString(vn.getAttrVal("name"));

        if (tableName.equals("category")) {
            AutoPilot column = new AutoPilot(vn);
            column.selectElement("column");

            while (column.iterate()) {
                 String text = vn.toNormalizedString(vn.getText());
                 String name = vn.toString(vn.getAttrVal("name"));

                 if (name.equals("catId")) {
                    Log.d("Category ID = " + text);
                 } else if (name.equals("catName")) {
                    Log.d("Category Name = " + text);
                 } 

            }
        }
     }
}

Result

Category ID = 20
Category Name = Fruit

Category ID = 31
Category Name = Vegetables

Category ID = 45
Category Name = Rice

Category ID = 50
Category Name = Potatoes

it works for me and hope it helps you.