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.View;
import android.view.WindowManager;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

import com.github.mikephil.charting.Approximator;
import com.github.mikephil.charting.ChartData;
import com.github.mikephil.charting.DataSet;
import com.github.mikephil.charting.Highlight;
import com.github.mikephil.charting.LineChart;
import com.github.mikephil.charting.OnChartValueSelectedListener;
import com.github.mikephil.charting.Series;
import com.github.mikephil.charting.Approximator.ApproximatorType;

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);

        mChart = (LineChart) findViewById(R.id.chart1);
        mChart.setOnChartValueSelectedListener(this);
        // mChart.setColorTemplate(new
        // ColorTemplate(ColorTemplate.getColors(this,
        // ColorTemplate.LIBERTY_COLORS)));

        // mChart.setDrawFilled(true);
        // mChart.setRoundedYLegend(false);
        // mChart.setStartAtZero(true);
        mChart.setDrawYValues(false);
        mChart.setLineWidth(5f);
        mChart.setCircleSize(5f);
        // mChart.setSpacePercent(20, 10);
        mChart.setYLegendCount(6);
        mChart.setTouchEnabled(true);
        mChart.setHighlightEnabled(true);
        // mChart.highlightValues(new int[] {2, 6});
        mChart.setDragEnabled(true);
        mChart.setTouchEnabled(true);

        TextView textView = new TextView(this);
        textView.setVisibility(View.VISIBLE);
        textView.setBackgroundColor(Color.WHITE);
        textView.setPadding(15, 15, 15, 15);
        textView.setText("Marker View");

        mChart.setDrawMarkerView(true);
        mChart.setMarkerView(textView);

        mSeekBarX.setProgress(45);
        mSeekBarY.setProgress(100);
    }

    @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.actionToggleRound: {
                if (mChart.isYLegendRounded())
                    mChart.setRoundedYLegend(false);
                else
                    mChart.setRoundedYLegend(true);
                mChart.invalidate();
                break;
            }
            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.actionToggleAdjustXLegend: {
                if (mChart.isAdjustXLegendEnabled())
                    mChart.setAdjustXLegend(false);
                else
                    mChart.setAdjustXLegend(true);

                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) {

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

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

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

        tvX.setText("" + (mSeekBarX.getProgress() + 1));
        tvY.setText("" + (mSeekBarY.getProgress() / 10));

//        Approximator a = new Approximator(ApproximatorType.DOUGLAS_PEUCKER);
//        ArrayList<Series> filtered = a.filter(yVals, 1.0);

        DataSet set1 = new DataSet(yVals, 0);
//        DataSet set2 = new DataSet(filtered, 1);
        ArrayList<DataSet> dataSets = new ArrayList<DataSet>();
        dataSets.add(set1);
//        dataSets.add(set2);
        
        ChartData data = new ChartData(xVals, dataSets);

        mChart.setData(data);
        mChart.invalidate();
    }

    @Override
    public void onValuesSelected(Series[] 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

    }
}