MultiLineChartActivity.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 com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.components.Legend.LegendPosition;
import com.github.mikephil.charting.data.DataSet;
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.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.notimportant.DemoBase;

import java.util.ArrayList;

public class MultiLineChartActivity extends DemoBase implements OnSeekBarChangeListener,
        OnChartValueSelectedListener {

    private LineChart 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_linechart);

        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 = (LineChart) findViewById(R.id.chart1);
        mChart.setOnChartValueSelectedListener(this);
        
        mChart.setDrawGridBackground(false);
        mChart.setDescription("");

        // mChart.setStartAtZero(true);

        // enable value highlighting
        mChart.setHighlightEnabled(true);

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

        // enable scaling and dragging
        mChart.setDragEnabled(true);
        mChart.setScaleEnabled(true);

        // if disabled, scaling can be done on x- and y-axis separately
        mChart.setPinchZoom(false);

        mSeekBarX.setProgress(20);
        mSeekBarY.setProgress(100);

        Legend l = mChart.getLegend();
        l.setPosition(LegendPosition.RIGHT_OF_CHART);
    }

    @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.actionToggleValues: {
                for (DataSet<?> set : mChart.getData().getDataSets())
                    set.setDrawValues(!set.isDrawValuesEnabled());

                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.actionToggleHighlight: {
                if (mChart.isHighlightEnabled())
                    mChart.setHighlightEnabled(false);
                else
                    mChart.setHighlightEnabled(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleFilled: {
                ArrayList<LineDataSet> sets = (ArrayList<LineDataSet>) mChart.getData()
                        .getDataSets();

                for (LineDataSet set : sets) {
                    if (set.isDrawFilledEnabled())
                        set.setDrawFilled(false);
                    else
                        set.setDrawFilled(true);
                }
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleCircles: {
                ArrayList<LineDataSet> sets = (ArrayList<LineDataSet>) mChart.getData()
                        .getDataSets();

                for (LineDataSet set : sets) {
                    if (set.isDrawCirclesEnabled())
                        set.setDrawCircles(false);
                    else
                        set.setDrawCircles(true);
                }
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleFilter: {

                // the angle of filtering is 35°
                Approximator a = new Approximator(ApproximatorType.DOUGLAS_PEUCKER, 35);

                if (!mChart.isFilteringEnabled()) {
                    mChart.enableFiltering(a);
                } else {
                    mChart.disableFiltering();
                }
                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.actionSave: {
                // mChart.saveToGallery("title"+System.currentTimeMillis());
                mChart.saveToPath("title" + System.currentTimeMillis(), "");
                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;
            }
        }
        return true;
    }

    private int[] mColors = new int[] {
            ColorTemplate.VORDIPLOM_COLORS[0], 
            ColorTemplate.VORDIPLOM_COLORS[1],
            ColorTemplate.VORDIPLOM_COLORS[2]
    };

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        
        mChart.resetTracking();

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

        ArrayList<String> xVals = new ArrayList<String>();
        for (int i = 0; i < mSeekBarX.getProgress(); i++) {
            xVals.add((i) + "");
        }
 
        ArrayList<LineDataSet> dataSets = new ArrayList<LineDataSet>();

        for (int z = 0; z < 3; z++) {

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

            for (int i = 0; i < mSeekBarX.getProgress(); i++) {
                double val = (Math.random() * mSeekBarY.getProgress()) + 3;
                values.add(new Entry((float) val, i));
            }

            LineDataSet d = new LineDataSet(values, "DataSet " + (z + 1));
            d.setLineWidth(2.5f);
            d.setCircleSize(4f);

            int color = mColors[z % mColors.length];
            d.setColor(color);
            d.setCircleColor(color);
            dataSets.add(d);
        }

        // make the first DataSet dashed
        dataSets.get(0).enableDashedLine(10, 10, 0);
        dataSets.get(0).setColors(ColorTemplate.VORDIPLOM_COLORS);
        dataSets.get(0).setCircleColors(ColorTemplate.VORDIPLOM_COLORS);

        LineData data = new LineData(xVals, dataSets);
        mChart.setData(data);
        mChart.invalidate();
    }

    @Override
    public void onValueSelected(Entry e, int dataSetIndex, Highlight h) {
        Log.i("VAL SELECTED",
                "Value: " + e.getVal() + ", xIndex: " + e.getXIndex()
                        + ", DataSet index: " + dataSetIndex);
    }

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

    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
    }
}