MPChartExample/src/com/xxmassdeveloper/mpchartexample/fragments/SimpleFragment.java

package com.xxmassdeveloper.mpchartexample.fragments;

import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.github.mikephil.charting.charts.ScatterChart;
import com.github.mikephil.charting.charts.ScatterChart.ScatterShape;
import com.github.mikephil.charting.data.BarData;
import com.github.mikephil.charting.data.BarDataSet;
import com.github.mikephil.charting.data.BarEntry;
import com.github.mikephil.charting.data.ChartData;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.LineData;
import com.github.mikephil.charting.data.LineDataSet;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.data.ScatterData;
import com.github.mikephil.charting.data.ScatterDataSet;
import com.github.mikephil.charting.interfaces.datasets.IBarDataSet;
import com.github.mikephil.charting.interfaces.datasets.ILineDataSet;
import com.github.mikephil.charting.interfaces.datasets.IScatterDataSet;
import com.github.mikephil.charting.utils.ColorTemplate;
import com.github.mikephil.charting.utils.FileUtils;

import java.util.ArrayList;

public abstract class SimpleFragment extends Fragment {
    
    private Typeface tf;
    
    public SimpleFragment() {
        
    }
    
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        tf = Typeface.createFromAsset(getActivity().getAssets(), "OpenSans-Regular.ttf");
        return super.onCreateView(inflater, container, savedInstanceState);
    }

    protected BarData generateBarData(int dataSets, float range, int count) {
        
        ArrayList<IBarDataSet> sets = new ArrayList<IBarDataSet>();
        
        for(int i = 0; i < dataSets; i++) {
           
            ArrayList<BarEntry> entries = new ArrayList<BarEntry>();
            
//            entries = FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "stacked_bars.txt");
            
            for(int j = 0; j < count; j++) {        
                entries.add(new BarEntry((float) (Math.random() * range) + range / 4, j));
            }
            
            BarDataSet ds = new BarDataSet(entries, getLabel(i));
            ds.setColors(ColorTemplate.VORDIPLOM_COLORS);
            sets.add(ds);
        }
        
        BarData d = new BarData(ChartData.generateXVals(0, count), sets);
        d.setValueTypeface(tf);
        return d;
    }
    
    protected ScatterData generateScatterData(int dataSets, float range, int count) {
        
        ArrayList<IScatterDataSet> sets = new ArrayList<IScatterDataSet>();
        
        ScatterShape[] shapes = ScatterChart.getAllPossibleShapes();
        
        for(int i = 0; i < dataSets; i++) {
           
            ArrayList<Entry> entries = new ArrayList<Entry>();
            
            for(int j = 0; j < count; j++) {        
                entries.add(new Entry((float) (Math.random() * range) + range / 4, j));
            }
            
            ScatterDataSet ds = new ScatterDataSet(entries, getLabel(i));
            ds.setScatterShapeSize(12f);
            ds.setScatterShape(shapes[i % shapes.length]);
            ds.setColors(ColorTemplate.COLORFUL_COLORS);
            ds.setScatterShapeSize(9f);
            sets.add(ds);
        }
        
        ScatterData d = new ScatterData(ChartData.generateXVals(0, count), sets);
        d.setValueTypeface(tf);
        return d;
    }
    
    /**
     * generates less data (1 DataSet, 4 values)
     * @return
     */
    protected PieData generatePieData() {
        
        int count = 4;
        
        ArrayList<Entry> entries1 = new ArrayList<Entry>();
        ArrayList<String> xVals = new ArrayList<String>();
        
        xVals.add("Quarter 1");
        xVals.add("Quarter 2");
        xVals.add("Quarter 3");
        xVals.add("Quarter 4");
        
        for(int i = 0; i < count; i++) {
            xVals.add("entry" + (i+1));
    
            entries1.add(new Entry((float) (Math.random() * 60) + 40, i));
        }
        
        PieDataSet ds1 = new PieDataSet(entries1, "Quarterly Revenues 2015");
        ds1.setColors(ColorTemplate.VORDIPLOM_COLORS);
        ds1.setSliceSpace(2f);
        ds1.setValueTextColor(Color.WHITE);
        ds1.setValueTextSize(12f);
        
        PieData d = new PieData(xVals, ds1);
        d.setValueTypeface(tf);

        return d;
    }
    
    protected LineData generateLineData() {
        
//        DataSet ds1 = new DataSet(n, "O(n)");  
//        DataSet ds2 = new DataSet(nlogn, "O(nlogn)"); 
//        DataSet ds3 = new DataSet(nsquare, "O(n\u00B2)");
//        DataSet ds4 = new DataSet(nthree, "O(n\u00B3)");
        
        ArrayList<ILineDataSet> sets = new ArrayList<ILineDataSet>();
        
        LineDataSet ds1 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "sine.txt"), "Sine function");
        LineDataSet ds2 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "cosine.txt"), "Cosine function");
        
        ds1.setLineWidth(2f);
        ds2.setLineWidth(2f);
        
        ds1.setDrawCircles(false);
        ds2.setDrawCircles(false);
        
        ds1.setColor(ColorTemplate.VORDIPLOM_COLORS[0]);
        ds2.setColor(ColorTemplate.VORDIPLOM_COLORS[1]);
        
        // load DataSets from textfiles in assets folders
        sets.add(ds1);
        sets.add(ds2);
        
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "n.txt"));
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "nlogn.txt"));
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "square.txt"));
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "three.txt"));
        
        int max = Math.max(sets.get(0).getEntryCount(), sets.get(1).getEntryCount());
        
        LineData d = new LineData(ChartData.generateXVals(0, max),  sets);
        d.setValueTypeface(tf);
        return d;
    }
    
    protected LineData getComplexity() {
        
        ArrayList<ILineDataSet> sets = new ArrayList<ILineDataSet>();
        
        LineDataSet ds1 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "n.txt"), "O(n)");
        LineDataSet ds2 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "nlogn.txt"), "O(nlogn)");
        LineDataSet ds3 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "square.txt"), "O(n\u00B2)");
        LineDataSet ds4 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "three.txt"), "O(n\u00B3)");
        
        ds1.setColor(ColorTemplate.VORDIPLOM_COLORS[0]);
        ds2.setColor(ColorTemplate.VORDIPLOM_COLORS[1]);
        ds3.setColor(ColorTemplate.VORDIPLOM_COLORS[2]);
        ds4.setColor(ColorTemplate.VORDIPLOM_COLORS[3]);
        
        ds1.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[0]);
        ds2.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[1]);
        ds3.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[2]);
        ds4.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[3]);
        
        ds1.setLineWidth(2.5f);
        ds1.setCircleRadius(3f);
        ds2.setLineWidth(2.5f);
        ds2.setCircleRadius(3f);
        ds3.setLineWidth(2.5f);
        ds3.setCircleRadius(3f);
        ds4.setLineWidth(2.5f);
        ds4.setCircleRadius(3f);
        
        
        // load DataSets from textfiles in assets folders
        sets.add(ds1);        
        sets.add(ds2);
        sets.add(ds3);
        sets.add(ds4);
        
        LineData d = new LineData(ChartData.generateXVals(0, ds1.getEntryCount()), sets);
        d.setValueTypeface(tf);
        return d;
    }
    
    private String[] mLabels = new String[] { "Company A", "Company B", "Company C", "Company D", "Company E", "Company F" };
//    private String[] mXVals = new String[] { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dec" };
    
    private String getLabel(int i) {
        return mLabels[i];
    }
}