prepareData complete method

prepareData method

private ArrayList<Subject> prepareData() {
    ArrayList<Subject> subjects = new ArrayList<Subject>();

    Subject physics = new Subject();
    physics.id = 1;
    physics.subjectName = "Physics";
    physics.chapters = new ArrayList<Chapter>();

    Chapter chapter1 = new Chapter();
    chapter1.id = 1;
    chapter1.chapterName = "Atomic power";
    chapter1.imageUrl = "http://ashishkudale.com/images/phy/atoms.png";

    Chapter chapter2 = new Chapter();
    chapter2.id = 2;
    chapter2.chapterName = "Theory of relativity";
    chapter2.imageUrl = "http://ashishkudale.com/images/phy/sigma.png";

    Chapter chapter3 = new Chapter();
    chapter3.id = 3;
    chapter3.chapterName = "Magnetic field";
    chapter3.imageUrl = "http://ashishkudale.com/images/phy/magnet.png";

    Chapter chapter4 = new Chapter();
    chapter4.id = 4;
    chapter4.chapterName = "Practical 1";
    chapter4.imageUrl = "http://ashishkudale.com/images/phy/caliper.png";

    Chapter chapter5 = new Chapter();
    chapter5.id = 5;
    chapter5.chapterName = "Practical 2";
    chapter5.imageUrl = "http://ashishkudale.com/images/phy/micrometer.png";

    physics.chapters.add(chapter1);
    physics.chapters.add(chapter2);
    physics.chapters.add(chapter3);
    physics.chapters.add(chapter4);
    physics.chapters.add(chapter5);

    Subject chem = new Subject();
    chem.id = 2;
    chem.subjectName = "Chemistry";
    chem.chapters = new ArrayList<Chapter>();

    Chapter chapter6 = new Chapter();
    chapter6.id = 6;
    chapter6.chapterName = "Chemical bonds";
    chapter6.imageUrl = "http://ashishkudale.com/images/chem/bonds.png";

    Chapter chapter7 = new Chapter();
    chapter7.id = 7;
    chapter7.chapterName = "Sodium";
    chapter7.imageUrl = "http://ashishkudale.com/images/chem/sodium.png";

    Chapter chapter8 = new Chapter();
    chapter8.id = 8;
    chapter8.chapterName = "Periodic table";
    chapter8.imageUrl = "http://ashishkudale.com/images/chem/periodic_table.png";

    Chapter chapter9 = new Chapter();
    chapter9.id = 9;
    chapter9.chapterName = "Acid and Base";
    chapter9.imageUrl = "http://ashishkudale.com/images/chem/chem.png";

    chem.chapters.add(chapter6);
    chem.chapters.add(chapter7);
    chem.chapters.add(chapter8);
    chem.chapters.add(chapter9);

    Subject bio = new Subject();
    bio.id = 3;
    bio.subjectName = "Biology";
    bio.chapters = new ArrayList<Chapter>();

    Chapter chapter10 = new Chapter();
    chapter10.id = 10;
    chapter10.chapterName = "Bacteria";
    chapter10.imageUrl = "http://ashishkudale.com/images/bio/bacteria.png";

    Chapter chapter11 = new Chapter();
    chapter11.id = 11;
    chapter11.chapterName = "DNA and RNA";
    chapter11.imageUrl = "http://ashishkudale.com/images/bio/dna.png";

    Chapter chapter12 = new Chapter();
    chapter12.id = 12;
    chapter12.chapterName = "Study of microscope";
    chapter12.imageUrl = "http://ashishkudale.com/images/bio/microscope.png";

    Chapter chapter13 = new Chapter();
    chapter13.id = 13;
    chapter13.chapterName = "Protein and fibers";
    chapter13.imageUrl = "http://ashishkudale.com/images/bio/protein.png";

    bio.chapters.add(chapter10);
    bio.chapters.add(chapter11);
    bio.chapters.add(chapter12);
    bio.chapters.add(chapter13);

    Subject maths = new Subject();
    maths.id = 4;
    maths.subjectName = "Maths";
    maths.chapters = new ArrayList<Chapter>();

    Chapter chapter14 = new Chapter();
    chapter14.id = 14;
    chapter14.chapterName = "Circle";
    chapter14.imageUrl = "http://ashishkudale.com/images/maths/circle.png";

    Chapter chapter15 = new Chapter();
    chapter15.id = 15;
    chapter15.chapterName = "Geometry";
    chapter15.imageUrl = "http://ashishkudale.com/images/maths/geometry.png";

    Chapter chapter16 = new Chapter();
    chapter16.id = 16;
    chapter16.chapterName = "Linear equations";
    chapter16.imageUrl = "http://ashishkudale.com/images/maths/linear.png";

    Chapter chapter17 = new Chapter();
    chapter17.id = 17;
    chapter17.chapterName = "Graph";
    chapter17.imageUrl = "http://ashishkudale.com/images/maths/plot.png";

    Chapter chapter18 = new Chapter();
    chapter18.id = 18;
    chapter18.chapterName = "Trigonometry";
    chapter18.imageUrl = "http://ashishkudale.com/images/maths/trigonometry.png";

    maths.chapters.add(chapter14);
    maths.chapters.add(chapter18);
    maths.chapters.add(chapter15);
    maths.chapters.add(chapter16);
    maths.chapters.add(chapter17);

    subjects.add(physics);
    subjects.add(chem);
    subjects.add(maths);
    subjects.add(bio);

    return subjects;
}