StackedBarActivity.java

package com.xxmassdeveloper.mpchartexample;

import android.graphics.Color;
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.Entry;
import com.github.mikephil.charting.highlight.Highlight;
import com.github.mikephil.charting.interfaces.datasets.IBarDataSet;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ColorTemplate;
import com.xxmassdeveloper.mpchartexample.custom.MyAxisValueFormatter;
import com.xxmassdeveloper.mpchartexample.custom.MyValueFormatter;
import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;

import java.util.ArrayList;
import java.util.List;

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.getDescription().setEnabled(false);

        // if more than 60 entries are displayed in the chart, no values will be
        // drawn
        mChart.setMaxVisibleValueCount(40);

        // scaling can now only be done on x- and y-axis separately
        mChart.setPinchZoom(false);

        mChart.setDrawGridBackground(false);
        mChart.setDrawBarShadow(false);

        mChart.setDrawValueAboveBar(false);
        mChart.setHighlightFullBarEnabled(false);

        // change the position of the y-labels
        YAxis leftAxis = mChart.getAxisLeft();
        leftAxis.setValueFormatter(new MyAxisValueFormatter());
        leftAxis.setAxisMinimum(0f); // this replaces setStartAtZero(true)
        mChart.getAxisRight().setEnabled(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.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
        l.setDrawInside(false);
        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: {
                List<IBarDataSet> sets = mChart.getData()
                        .getDataSets();

                for (IBarDataSet iSet : sets) {

                    BarDataSet set = (BarDataSet) iSet;
                    set.setDrawValues(!set.isDrawValuesEnabled());
                }

                mChart.invalidate();
                break;
            }
            case R.id.actionToggleIcons: {
                List<IBarDataSet> sets = mChart.getData()
                        .getDataSets();

                for (IBarDataSet iSet : sets) {

                    BarDataSet set = (BarDataSet) iSet;
                    set.setDrawIcons(!set.isDrawIconsEnabled());
                }

                mChart.invalidate();
                break;
            }
            case R.id.actionToggleHighlight: {
                if (mChart.getData() != null) {
                    mChart.getData().setHighlightEnabled(!mChart.getData().isHighlightEnabled());
                    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.actionToggleBarBorders: {
                for (IBarDataSet set : mChart.getData().getDataSets())
                    ((BarDataSet) set).setBarBorderWidth(set.getBarBorderWidth() == 1.f ? 0.f : 1.f);

                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.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<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(
                    i,
                    new float[]{val1, val2, val3},
                    getResources().getDrawable(R.drawable.star)));
        }

        BarDataSet set1;

        if (mChart.getData() != null &&
                mChart.getData().getDataSetCount() > 0) {
            set1 = (BarDataSet) mChart.getData().getDataSetByIndex(0);
            set1.setValues(yVals1);
            mChart.getData().notifyDataChanged();
            mChart.notifyDataSetChanged();
        } else {
            set1 = new BarDataSet(yVals1, "Statistics Vienna 2014");
            set1.setDrawIcons(false);
            set1.setColors(getColors());
            set1.setStackLabels(new String[]{"Births", "Divorces", "Marriages"});

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

            BarData data = new BarData(dataSets);
            data.setValueFormatter(new MyValueFormatter());
            data.setValueTextColor(Color.WHITE);

            mChart.setData(data);
        }

        mChart.setFitBars(true);
        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, Highlight h) {

        BarEntry entry = (BarEntry) e;

        if (entry.getYVals() != null)
            Log.i("VAL SELECTED", "Value: " + entry.getYVals()[h.getStackIndex()]);
        else
            Log.i("VAL SELECTED", "Value: " + entry.getY());
    }

    @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 < colors.length; i++) {
            colors[i] = ColorTemplate.MATERIAL_COLORS[i];
        }

        return colors;
    }
}