StackedBarActivity.java

package com.xxmassdeveloper.mpchartexample;

import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;

import com.github.mikephil.charting.charts.BarChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.components.Legend.LegendPosition;
import com.github.mikephil.charting.components.XAxis;
import com.github.mikephil.charting.components.XAxis.XAxisPosition;
import com.github.mikephil.charting.components.YAxis;
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.DataSet;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.filter.Approximator;
import com.github.mikephil.charting.data.filter.Approximator.ApproximatorType;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ColorTemplate;
import com.github.mikephil.charting.utils.Highlight;
import com.xxmassdeveloper.mpchartexample.custom.MyValueFormatter;
import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;

import java.util.ArrayList;

public class StackedBarActivity extends DemoBase implements OnSeekBarChangeListener,
        OnChartValueSelectedListener {

    private BarChart mChart;
    private SeekBar mSeekBarX, mSeekBarY;
    private TextView tvX, tvY;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_barchart);

        tvX = (TextView) findViewById(R.id.tvXMax);
        tvY = (TextView) findViewById(R.id.tvYMax);

        mSeekBarX = (SeekBar) findViewById(R.id.seekBar1);
        mSeekBarX.setOnSeekBarChangeListener(this);

        mSeekBarY = (SeekBar) findViewById(R.id.seekBar2);
        mSeekBarY.setOnSeekBarChangeListener(this);

        mChart = (BarChart) findViewById(R.id.chart1);
        mChart.setOnChartValueSelectedListener(this);

        mChart.setDescription("");

        // if more than 60 entries are displayed in the chart, no values will be
        // drawn
        mChart.setMaxVisibleValueCount(60);

        // if false values are only drawn for the stack sum, else each value is
        // drawn
        mChart.setDrawValuesForWholeStack(true);
        // scaling can now only be done on x- and y-axis separately
        mChart.setPinchZoom(false);

        mChart.setDrawBarShadow(false);
        
        mChart.setDrawValueAboveBar(false);

        // change the position of the y-labels
        YAxis yLabels = mChart.getAxisLeft();
        // yLabels.setPosition(YLabelPosition.BOTH_SIDED);
//        yLabels.setLabelCount(5);
        yLabels.setValueFormatter(new MyValueFormatter());
        
        mChart.getAxisRight().setValueFormatter(new MyValueFormatter());
        mChart.getAxisRight().setDrawGridLines(false);

        XAxis xLabels = mChart.getXAxis();
        xLabels.setPosition(XAxisPosition.TOP);

        // mChart.setDrawXLabels(false);
        // mChart.setDrawYLabels(false);

        // setting data
        mSeekBarX.setProgress(12);
        mSeekBarY.setProgress(100);

        Legend l = mChart.getLegend();
        l.setPosition(LegendPosition.BELOW_CHART_RIGHT);
        l.setFormSize(8f);
        l.setFormToTextSpace(4f);
        l.setXEntrySpace(6f);

        // mChart.setDrawLegend(false);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.bar, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
            case R.id.actionToggleValues: {
                for (DataSet<?> set : mChart.getData().getDataSets())
                    set.setDrawValues(!set.isDrawValuesEnabled());

                mChart.invalidate();
                break;
            }
            case R.id.actionToggleHighlight: {
                if (mChart.isHighlightEnabled())
                    mChart.setHighlightEnabled(false);
                else
                    mChart.setHighlightEnabled(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionTogglePinch: {
                if (mChart.isPinchZoomEnabled())
                    mChart.setPinchZoom(false);
                else
                    mChart.setPinchZoom(true);

                mChart.invalidate();
                break;
            }
            case R.id.actionToggleAutoScaleMinMax: {
                mChart.setAutoScaleMinMaxEnabled(!mChart.isAutoScaleMinMaxEnabled());
                mChart.notifyDataSetChanged();
                break;
            }
            case R.id.actionToggleHighlightArrow: {
                if (mChart.isDrawHighlightArrowEnabled())
                    mChart.setDrawHighlightArrow(false);
                else
                    mChart.setDrawHighlightArrow(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleStartzero: {
                mChart.getAxisLeft().setStartAtZero(!mChart.getAxisLeft().isStartAtZeroEnabled());
                mChart.getAxisRight().setStartAtZero(!mChart.getAxisRight().isStartAtZeroEnabled());
                mChart.invalidate();
                break;
            }
            case R.id.animateX: {
                mChart.animateX(3000);
                break;
            }
            case R.id.animateY: {
                mChart.animateY(3000);
                break;
            }
            case R.id.animateXY: {

                mChart.animateXY(3000, 3000);
                break;
            }
            case R.id.actionToggleFilter: {

                Approximator a = new Approximator(ApproximatorType.DOUGLAS_PEUCKER, 25);

                if (!mChart.isFilteringEnabled()) {
                    mChart.enableFiltering(a);
                } else {
                    mChart.disableFiltering();
                }
                mChart.invalidate();
                break;
            }
            case R.id.actionSave: {
                if (mChart.saveToGallery("title" + System.currentTimeMillis(), 50)) {
                    Toast.makeText(getApplicationContext(), "Saving SUCCESSFUL!",
                            Toast.LENGTH_SHORT).show();
                } else
                    Toast.makeText(getApplicationContext(), "Saving FAILED!", Toast.LENGTH_SHORT)
                            .show();
                break;
            }
        }
        return true;
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

        tvX.setText("" + (mSeekBarX.getProgress() + 1));
        tvY.setText("" + (mSeekBarY.getProgress()));

        ArrayList<String> xVals = new ArrayList<String>();
        for (int i = 0; i < mSeekBarX.getProgress() + 1; i++) {
            xVals.add(mMonths[i % mMonths.length]);
        }

        ArrayList<BarEntry> yVals1 = new ArrayList<BarEntry>();

        for (int i = 0; i < mSeekBarX.getProgress() + 1; i++) {
            float mult = (mSeekBarY.getProgress() + 1);
            float val1 = (float) (Math.random() * mult) + mult / 3;
            float val2 = (float) (Math.random() * mult) + mult / 3;
            float val3 = (float) (Math.random() * mult) + mult / 3;

            yVals1.add(new BarEntry(new float[] {
                    val1, val2, val3
            }, i));
        }

        BarDataSet set1 = new BarDataSet(yVals1, "Statistics Vienna 2014");
        set1.setColors(getColors());
        set1.setStackLabels(new String[] {
                "Births", "Divorces", "Marriages"
        });

        ArrayList<BarDataSet> dataSets = new ArrayList<BarDataSet>();
        dataSets.add(set1);

        BarData data = new BarData(xVals, dataSets);
        data.setValueFormatter(new MyValueFormatter());

        mChart.setData(data);
        mChart.invalidate();
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onValueSelected(Entry e, int dataSetIndex, Highlight h) {

        BarEntry entry = (BarEntry) e;
        Log.i("VAL SELECTED",
                "Value: " + entry.getVals()[h.getStackIndex()]);
    }

    @Override
    public void onNothingSelected() {
        // TODO Auto-generated method stub

    }
    
    private int[] getColors() {
        
        int stacksize = 3;
        
        // have as many colors as stack-values per entry
        int []colors = new int[stacksize];
        
        for(int i = 0; i < stacksize; i++) {
            colors[i] = ColorTemplate.VORDIPLOM_COLORS[i];
        }      
        
        return colors;
    }
}