MPChartExample/src/com/example/mpchartexample/LineChartActivity.java

package com.example.mpchartexample;

import android.app.Activity;
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 com.github.mikephil.charting.charts.BarLineChartBase.BorderStyle;
import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.data.ChartData;
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.interfaces.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ColorTemplate;
import com.github.mikephil.charting.utils.Highlight;
import com.github.mikephil.charting.utils.Legend;
import com.github.mikephil.charting.utils.Legend.LegendPosition;

import java.util.ArrayList;

public class LineChartActivity extends Activity 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);

        // create a color template for one dataset with only one color
        ColorTemplate ct = new ColorTemplate();
        // ct.addColorsForDataSets(new int[] {
        // R.color.colorful_1
        // }, this);
        ct.addDataSetColors(new int[] {
            R.color.colorful_1
        }, this);

        mChart = (LineChart) findViewById(R.id.chart1);
        mChart.setOnChartValueSelectedListener(this);
        mChart.setColorTemplate(ct);

        // if enabled, the chart will always start at zero on the y-axis
        mChart.setStartAtZero(false);

        // disable the drawing of values into the chart
        mChart.setDrawYValues(false);
 
        mChart.setLineWidth(4f);
        mChart.setCircleSize(4f);
        
        mChart.setDrawBorder(true);
        mChart.setBorderStyles(new BorderStyle[] { BorderStyle.BOTTOM });

        // no description text
        mChart.setDescription("");

        // // enable / disable grid lines
        // mChart.setDrawVerticalGrid(false);
        // mChart.setDrawHorizontalGrid(false);
        //
        // // enable / disable grid background
        // mChart.setDrawGridBackground(false);
        //
        // mChart.setDrawXLegend(false);
        // mChart.setDrawYLegend(false);

        // set the number of y-legend entries the chart should have
        mChart.setYLabelCount(6);

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

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

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

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

        // create a custom MarkerView (extend MarkerView) and specify the layout
        // to use for it
        MyMarkerView mv = new MyMarkerView(this, R.layout.custom_marker_view);

        // define an offset to change the original position of the marker
        // (optional)
        mv.setOffsets(-mv.getMeasuredWidth() / 2, -mv.getMeasuredHeight());

        // set the marker to the chart
        mChart.setMarkerView(mv);

        // enable/disable highlight indicators (the lines that indicate the
        // highlighted Entry)
        mChart.setHighlightIndicatorEnabled(false);

        // set the line to be drawn like this "- - - - - -"
        mChart.enableDashedLine(10f, 5f, 0f);

        // add data to the chart
        mSeekBarX.setProgress(45);
        mSeekBarY.setProgress(100);
                
        // get the legend
        Legend l = mChart.getLegend();
        
        // modify it
//        l.setPosition(LegendPosition.LEFT_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: {
                if (mChart.isDrawYValuesEnabled())
                    mChart.setDrawYValues(false);
                else
                    mChart.setDrawYValues(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleHighlight: {
                if (mChart.isHighlightEnabled())
                    mChart.setHighlightEnabled(false);
                else
                    mChart.setHighlightEnabled(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleFilled: {
                if (mChart.isDrawFilledEnabled())
                    mChart.setDrawFilled(false);
                else
                    mChart.setDrawFilled(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleCircles: {
                if (mChart.isDrawCirclesEnabled())
                    mChart.setDrawCircles(false);
                else
                    mChart.setDrawCircles(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleStartzero: {
                if (mChart.isStartAtZeroEnabled())
                    mChart.setStartAtZero(false);
                else
                    mChart.setStartAtZero(true);

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

                mChart.invalidate();
                break;
            }
            case R.id.actionToggleAdjustXLegend: {
                if (mChart.isAdjustXLabelsEnabled())
                    mChart.setAdjustXLabels(false);
                else
                    mChart.setAdjustXLabels(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.actionDashedLine: {
                if (!mChart.isDashedLineEnabled()) {
                    mChart.enableDashedLine(10f, 5f, 0f);
                } else {
                    mChart.disableDashedLine();
                }
                mChart.invalidate();
                break;
            }
            case R.id.actionSave: {
                // mChart.saveToGallery("title"+System.currentTimeMillis());
                mChart.saveToPath("title" + System.currentTimeMillis(), "");
                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(); i++) {
            xVals.add((i) + "");
        }

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

        for (int i = 0; i < mSeekBarX.getProgress(); i++) {
            float mult = (mSeekBarY.getProgress() + 1);
            float val = (float) (Math.random() * mult) + 3;// + (float)
                                                               // ((mult *
                                                               // 0.1) / 10);
            yVals.add(new Entry(val, i));
        }

        // create a dataset and give it a type
        DataSet set1 = new DataSet(yVals, 0);

        ArrayList<DataSet> dataSets = new ArrayList<DataSet>();
        dataSets.add(set1); // add the datasets

        // create a data object with the datasets
        ChartData data = new ChartData(xVals, dataSets);

        // set data
        mChart.setData(data);

        // redraw
        mChart.invalidate();
    }

    @Override
    public void onValuesSelected(Entry[] values, Highlight[] highlights) {
        Log.i("VALS SELECTED",
                "Value: " + values[0].getVal() + ", xIndex: " + highlights[0].getXIndex()
                        + ", DataSet index: " + highlights[0].getDataSetIndex());
    }

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

    }

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

    }

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

    }
}