BarChartActivityMultiDataset.java

package com.xxmassdeveloper.mpchartexample;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import androidx.core.content.ContextCompat;
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 com.github.mikephil.charting.charts.BarChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.components.XAxis;
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.formatter.LargeValueFormatter;
import com.github.mikephil.charting.formatter.ValueFormatter;
import com.github.mikephil.charting.highlight.Highlight;
import com.github.mikephil.charting.interfaces.datasets.IBarDataSet;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.xxmassdeveloper.mpchartexample.custom.MyMarkerView;
import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;

import java.util.ArrayList;
import java.util.Locale;

public class BarChartActivityMultiDataset extends DemoBase implements OnSeekBarChangeListener,
        OnChartValueSelectedListener {

    private BarChart chart;
    private SeekBar seekBarX, seekBarY;
    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);

        setTitle("BarChartActivityMultiDataset");

        tvX = findViewById(R.id.tvXMax);
        tvX.setTextSize(10);
        tvY = findViewById(R.id.tvYMax);

        seekBarX = findViewById(R.id.seekBar1);
        seekBarX.setMax(50);
        seekBarX.setOnSeekBarChangeListener(this);

        seekBarY = findViewById(R.id.seekBar2);
        seekBarY.setOnSeekBarChangeListener(this);

        chart = findViewById(R.id.chart1);
        chart.setOnChartValueSelectedListener(this);
        chart.getDescription().setEnabled(false);

//        chart.setDrawBorders(true);

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

        chart.setDrawBarShadow(false);

        chart.setDrawGridBackground(false);

        // create a custom MarkerView (extend MarkerView) and specify the layout
        // to use for it
        MyMarkerView mv = new MyMarkerView(this, R.layout.custom_marker_view);
        mv.setChartView(chart); // For bounds control
        chart.setMarker(mv); // Set the marker to the chart

        seekBarX.setProgress(10);
        seekBarY.setProgress(100);

        Legend l = chart.getLegend();
        l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.VERTICAL);
        l.setDrawInside(true);
        l.setTypeface(tfLight);
        l.setYOffset(0f);
        l.setXOffset(10f);
        l.setYEntrySpace(0f);
        l.setTextSize(8f);

        XAxis xAxis = chart.getXAxis();
        xAxis.setTypeface(tfLight);
        xAxis.setGranularity(1f);
        xAxis.setCenterAxisLabels(true);
        xAxis.setValueFormatter(new ValueFormatter() {
            @Override
            public String getFormattedValue(float value) {
                return String.valueOf((int) value);
            }
        });

        YAxis leftAxis = chart.getAxisLeft();
        leftAxis.setTypeface(tfLight);
        leftAxis.setValueFormatter(new LargeValueFormatter());
        leftAxis.setDrawGridLines(false);
        leftAxis.setSpaceTop(35f);
        leftAxis.setAxisMinimum(0f); // this replaces setStartAtZero(true)

        chart.getAxisRight().setEnabled(false);
    }

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

        float groupSpace = 0.08f;
        float barSpace = 0.03f; // x4 DataSet
        float barWidth = 0.2f; // x4 DataSet
        // (0.2 + 0.03) * 4 + 0.08 = 1.00 -> interval per "group"

        int groupCount = seekBarX.getProgress() + 1;
        int startYear = 1980;
        int endYear = startYear + groupCount;

        tvX.setText(String.format(Locale.ENGLISH, "%d-%d", startYear, endYear));
        tvY.setText(String.valueOf(seekBarY.getProgress()));

        ArrayList<BarEntry> values1 = new ArrayList<>();
        ArrayList<BarEntry> values2 = new ArrayList<>();
        ArrayList<BarEntry> values3 = new ArrayList<>();
        ArrayList<BarEntry> values4 = new ArrayList<>();

        float randomMultiplier = seekBarY.getProgress() * 100000f;

        for (int i = startYear; i < endYear; i++) {
            values1.add(new BarEntry(i, (float) (Math.random() * randomMultiplier)));
            values2.add(new BarEntry(i, (float) (Math.random() * randomMultiplier)));
            values3.add(new BarEntry(i, (float) (Math.random() * randomMultiplier)));
            values4.add(new BarEntry(i, (float) (Math.random() * randomMultiplier)));
        }

        BarDataSet set1, set2, set3, set4;

        if (chart.getData() != null && chart.getData().getDataSetCount() > 0) {

            set1 = (BarDataSet) chart.getData().getDataSetByIndex(0);
            set2 = (BarDataSet) chart.getData().getDataSetByIndex(1);
            set3 = (BarDataSet) chart.getData().getDataSetByIndex(2);
            set4 = (BarDataSet) chart.getData().getDataSetByIndex(3);
            set1.setValues(values1);
            set2.setValues(values2);
            set3.setValues(values3);
            set4.setValues(values4);
            chart.getData().notifyDataChanged();
            chart.notifyDataSetChanged();

        } else {
            // create 4 DataSets
            set1 = new BarDataSet(values1, "Company A");
            set1.setColor(Color.rgb(104, 241, 175));
            set2 = new BarDataSet(values2, "Company B");
            set2.setColor(Color.rgb(164, 228, 251));
            set3 = new BarDataSet(values3, "Company C");
            set3.setColor(Color.rgb(242, 247, 158));
            set4 = new BarDataSet(values4, "Company D");
            set4.setColor(Color.rgb(255, 102, 0));

            BarData data = new BarData(set1, set2, set3, set4);
            data.setValueFormatter(new LargeValueFormatter());
            data.setValueTypeface(tfLight);

            chart.setData(data);
        }

        // specify the width each bar should have
        chart.getBarData().setBarWidth(barWidth);

        // restrict the x-axis range
        chart.getXAxis().setAxisMinimum(startYear);

        // barData.getGroupWith(...) is a helper that calculates the width each group needs based on the provided parameters
        chart.getXAxis().setAxisMaximum(startYear + chart.getBarData().getGroupWidth(groupSpace, barSpace) * groupCount);
        chart.groupBars(startYear, groupSpace, barSpace);
        chart.invalidate();
    }

    @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.viewGithub: {
                Intent i = new Intent(Intent.ACTION_VIEW);
                i.setData(Uri.parse("https://github.com/PhilJay/MPAndroidChart/blob/master/MPChartExample/src/com/xxmassdeveloper/mpchartexample/BarChartActivityMultiDataset.java"));
                startActivity(i);
                break;
            }
            case R.id.actionToggleValues: {
                for (IBarDataSet set : chart.getData().getDataSets())
                    set.setDrawValues(!set.isDrawValuesEnabled());

                chart.invalidate();
                break;
            }
            case R.id.actionTogglePinch: {
                if (chart.isPinchZoomEnabled())
                    chart.setPinchZoom(false);
                else
                    chart.setPinchZoom(true);

                chart.invalidate();
                break;
            }
            case R.id.actionToggleAutoScaleMinMax: {
                chart.setAutoScaleMinMaxEnabled(!chart.isAutoScaleMinMaxEnabled());
                chart.notifyDataSetChanged();
                break;
            }
            case R.id.actionToggleBarBorders: {
                for (IBarDataSet set : chart.getData().getDataSets())
                    ((BarDataSet) set).setBarBorderWidth(set.getBarBorderWidth() == 1.f ? 0.f : 1.f);

                chart.invalidate();
                break;
            }
            case R.id.actionToggleHighlight: {
                if (chart.getData() != null) {
                    chart.getData().setHighlightEnabled(!chart.getData().isHighlightEnabled());
                    chart.invalidate();
                }
                break;
            }
            case R.id.actionSave: {
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
                    saveToGallery();
                } else {
                    requestStoragePermission(chart);
                }
                break;
            }
            case R.id.animateX: {
                chart.animateX(2000);
                break;
            }
            case R.id.animateY: {
                chart.animateY(2000);
                break;
            }
            case R.id.animateXY: {
                chart.animateXY(2000, 2000);
                break;
            }
        }
        return true;
    }

    @Override
    protected void saveToGallery() {
        saveToGallery(chart, "BarChartActivityMultiDataset");
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {}

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {}

    @Override
    public void onValueSelected(Entry e, Highlight h) {
        Log.i("Activity", "Selected: " + e.toString() + ", dataSet: " + h.getDataSetIndex());
    }

    @Override
    public void onNothingSelected() {
        Log.i("Activity", "Nothing selected.");
    }
}