LineChartActivity1.java

package com.xxmassdeveloper.mpchartexample;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.drawable.Drawable;
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.animation.Easing;
import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.components.Legend.LegendForm;
import com.github.mikephil.charting.components.LimitLine;
import com.github.mikephil.charting.components.LimitLine.LimitLabelPosition;
import com.github.mikephil.charting.components.XAxis;
import com.github.mikephil.charting.components.YAxis;
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.formatter.IFillFormatter;
import com.github.mikephil.charting.highlight.Highlight;
import com.github.mikephil.charting.interfaces.dataprovider.LineDataProvider;
import com.github.mikephil.charting.interfaces.datasets.ILineDataSet;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.Utils;
import com.xxmassdeveloper.mpchartexample.custom.MyMarkerView;
import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;

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

/**
 * Example of a heavily customized {@link LineChart} with limit lines, custom line shapes, etc.
 *
 * @since 1.7.4
 * @version 3.1.0
 */
public class LineChartActivity1 extends DemoBase implements OnSeekBarChangeListener,
        OnChartValueSelectedListener {

    private LineChart 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_linechart);

        setTitle("LineChartActivity1");

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

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

        seekBarY = findViewById(R.id.seekBar2);
        seekBarY.setMax(180);
        seekBarY.setOnSeekBarChangeListener(this);


        {   // // Chart Style // //
            chart = findViewById(R.id.chart1);

            // background color
            chart.setBackgroundColor(Color.WHITE);

            // disable description text
            chart.getDescription().setEnabled(false);

            // enable touch gestures
            chart.setTouchEnabled(true);

            // set listeners
            chart.setOnChartValueSelectedListener(this);
            chart.setDrawGridBackground(false);

            // create marker to display box when values are selected
            MyMarkerView mv = new MyMarkerView(this, R.layout.custom_marker_view);

            // Set the marker to the chart
            mv.setChartView(chart);
            chart.setMarker(mv);

            // enable scaling and dragging
            chart.setDragEnabled(true);
            chart.setScaleEnabled(true);
            // chart.setScaleXEnabled(true);
            // chart.setScaleYEnabled(true);

            // force pinch zoom along both axis
            chart.setPinchZoom(true);
        }

        XAxis xAxis;
        {   // // X-Axis Style // //
            xAxis = chart.getXAxis();

            // vertical grid lines
            xAxis.enableGridDashedLine(10f, 10f, 0f);
        }

        YAxis yAxis;
        {   // // Y-Axis Style // //
            yAxis = chart.getAxisLeft();

            // disable dual axis (only use LEFT axis)
            chart.getAxisRight().setEnabled(false);

            // horizontal grid lines
            yAxis.enableGridDashedLine(10f, 10f, 0f);

            // axis range
            yAxis.setAxisMaximum(200f);
            yAxis.setAxisMinimum(-50f);
        }


        {   // // Create Limit Lines // //
            LimitLine llXAxis = new LimitLine(9f, "Index 10");
            llXAxis.setLineWidth(4f);
            llXAxis.enableDashedLine(10f, 10f, 0f);
            llXAxis.setLabelPosition(LimitLabelPosition.RIGHT_BOTTOM);
            llXAxis.setTextSize(10f);
            llXAxis.setTypeface(tfRegular);

            LimitLine ll1 = new LimitLine(150f, "Upper Limit");
            ll1.setLineWidth(4f);
            ll1.enableDashedLine(10f, 10f, 0f);
            ll1.setLabelPosition(LimitLabelPosition.RIGHT_TOP);
            ll1.setTextSize(10f);
            ll1.setTypeface(tfRegular);

            LimitLine ll2 = new LimitLine(-30f, "Lower Limit");
            ll2.setLineWidth(4f);
            ll2.enableDashedLine(10f, 10f, 0f);
            ll2.setLabelPosition(LimitLabelPosition.RIGHT_BOTTOM);
            ll2.setTextSize(10f);
            ll2.setTypeface(tfRegular);

            // draw limit lines behind data instead of on top
            yAxis.setDrawLimitLinesBehindData(true);
            xAxis.setDrawLimitLinesBehindData(true);

            // add limit lines
            yAxis.addLimitLine(ll1);
            yAxis.addLimitLine(ll2);
            //xAxis.addLimitLine(llXAxis);
        }

        // add data
        seekBarX.setProgress(45);
        seekBarY.setProgress(180);
        setData(45, 180);

        // draw points over time
        chart.animateX(1500);

        // get the legend (only possible after setting data)
        Legend l = chart.getLegend();

        // draw legend entries as lines
        l.setForm(LegendForm.LINE);
    }

    private void setData(int count, float range) {

        ArrayList<Entry> values = new ArrayList<>();

        for (int i = 0; i < count; i++) {

            float val = (float) (Math.random() * range) - 30;
            values.add(new Entry(i, val, getResources().getDrawable(R.drawable.star)));
        }

        LineDataSet set1;

        if (chart.getData() != null &&
                chart.getData().getDataSetCount() > 0) {
            set1 = (LineDataSet) chart.getData().getDataSetByIndex(0);
            set1.setValues(values);
            set1.notifyDataSetChanged();
            chart.getData().notifyDataChanged();
            chart.notifyDataSetChanged();
        } else {
            // create a dataset and give it a type
            set1 = new LineDataSet(values, "DataSet 1");

            set1.setDrawIcons(false);

            // draw dashed line
            set1.enableDashedLine(10f, 5f, 0f);

            // black lines and points
            set1.setColor(Color.BLACK);
            set1.setCircleColor(Color.BLACK);

            // line thickness and point size
            set1.setLineWidth(1f);
            set1.setCircleRadius(3f);

            // draw points as solid circles
            set1.setDrawCircleHole(false);

            // customize legend entry
            set1.setFormLineWidth(1f);
            set1.setFormLineDashEffect(new DashPathEffect(new float[]{10f, 5f}, 0f));
            set1.setFormSize(15.f);

            // text size of values
            set1.setValueTextSize(9f);

            // draw selection line as dashed
            set1.enableDashedHighlightLine(10f, 5f, 0f);

            // set the filled area
            set1.setDrawFilled(true);
            set1.setFillFormatter(new IFillFormatter() {
                @Override
                public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
                    return chart.getAxisLeft().getAxisMinimum();
                }
            });

            // set color of filled area
            if (Utils.getSDKInt() >= 18) {
                // drawables only supported on api level 18 and above
                Drawable drawable = ContextCompat.getDrawable(this, R.drawable.fade_red);
                set1.setFillDrawable(drawable);
            } else {
                set1.setFillColor(Color.BLACK);
            }

            ArrayList<ILineDataSet> dataSets = new ArrayList<>();
            dataSets.add(set1); // add the data sets

            // create a data object with the data sets
            LineData data = new LineData(dataSets);

            // set data
            chart.setData(data);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.line, 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/LineChartActivity1.java"));
                startActivity(i);
                break;
            }
            case R.id.actionToggleValues: {
                List<ILineDataSet> sets = chart.getData()
                        .getDataSets();

                for (ILineDataSet iSet : sets) {

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

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

                for (ILineDataSet iSet : sets) {

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

                chart.invalidate();
                break;
            }
            case R.id.actionToggleHighlight: {
                if(chart.getData() != null) {
                    chart.getData().setHighlightEnabled(!chart.getData().isHighlightEnabled());
                    chart.invalidate();
                }
                break;
            }
            case R.id.actionToggleFilled: {

                List<ILineDataSet> sets = chart.getData()
                        .getDataSets();

                for (ILineDataSet iSet : sets) {

                    LineDataSet set = (LineDataSet) iSet;
                    if (set.isDrawFilledEnabled())
                        set.setDrawFilled(false);
                    else
                        set.setDrawFilled(true);
                }
                chart.invalidate();
                break;
            }
            case R.id.actionToggleCircles: {
                List<ILineDataSet> sets = chart.getData()
                        .getDataSets();

                for (ILineDataSet iSet : sets) {

                    LineDataSet set = (LineDataSet) iSet;
                    if (set.isDrawCirclesEnabled())
                        set.setDrawCircles(false);
                    else
                        set.setDrawCircles(true);
                }
                chart.invalidate();
                break;
            }
            case R.id.actionToggleCubic: {
                List<ILineDataSet> sets = chart.getData()
                        .getDataSets();

                for (ILineDataSet iSet : sets) {

                    LineDataSet set = (LineDataSet) iSet;
                    set.setMode(set.getMode() == LineDataSet.Mode.CUBIC_BEZIER
                            ? LineDataSet.Mode.LINEAR
                            :  LineDataSet.Mode.CUBIC_BEZIER);
                }
                chart.invalidate();
                break;
            }
            case R.id.actionToggleStepped: {
                List<ILineDataSet> sets = chart.getData()
                        .getDataSets();

                for (ILineDataSet iSet : sets) {

                    LineDataSet set = (LineDataSet) iSet;
                    set.setMode(set.getMode() == LineDataSet.Mode.STEPPED
                            ? LineDataSet.Mode.LINEAR
                            :  LineDataSet.Mode.STEPPED);
                }
                chart.invalidate();
                break;
            }
            case R.id.actionToggleHorizontalCubic: {
                List<ILineDataSet> sets = chart.getData()
                        .getDataSets();

                for (ILineDataSet iSet : sets) {

                    LineDataSet set = (LineDataSet) iSet;
                    set.setMode(set.getMode() == LineDataSet.Mode.HORIZONTAL_BEZIER
                            ? LineDataSet.Mode.LINEAR
                            :  LineDataSet.Mode.HORIZONTAL_BEZIER);
                }
                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.animateX: {
                chart.animateX(2000);
                break;
            }
            case R.id.animateY: {
                chart.animateY(2000, Easing.EaseInCubic);
                break;
            }
            case R.id.animateXY: {
                chart.animateXY(2000, 2000);
                break;
            }
            case R.id.actionSave: {
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
                    saveToGallery();
                } else {
                    requestStoragePermission(chart);
                }
                break;
            }
        }
        return true;
    }

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

        tvX.setText(String.valueOf(seekBarX.getProgress()));
        tvY.setText(String.valueOf(seekBarY.getProgress()));

        setData(seekBarX.getProgress(), seekBarY.getProgress());

        // redraw
        chart.invalidate();
    }

    @Override
    protected void saveToGallery() {
        saveToGallery(chart, "LineChartActivity1");
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {}

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {}

    @Override
    public void onValueSelected(Entry e, Highlight h) {
        toggleCirclesColorOnGraphSelection(true);
        Log.i("Entry selected", e.toString());
        Log.i("LOW HIGH",
                "low: " + chart.getLowestVisibleX() + ", high: " + chart.getHighestVisibleX());
        Log.i("MIN MAX",
                "xMin: " + chart.getXChartMin() + ", xMax: " + chart.getXChartMax() + ", yMin: "
                        + chart.getYChartMin() + ", yMax: " + chart.getYChartMax());
    }

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

    private void toggleCirclesColorOnGraphSelection(boolean isSelected) {
        List<ILineDataSet> dataSets = chart.getData().getDataSets();
        for (int i = 0; i < dataSets.size(); i++) {
            ILineDataSet dataSet = dataSets.get(i);
            if (dataSet instanceof LineDataSet) {
                List<Integer> colors = new ArrayList<>();
                for (int i1 = 0; i1 < dataSet.getEntryCount(); i1++) {
                    colors.add(getResources().getColor(isSelected ? R.color.gray : R.color.black));
                }
                ((LineDataSet) dataSet).setCircleColors(colors);
            }
        }
        chart.notifyDataSetChanged();
    }
}