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

package com.xxmassdeveloper.mpchartexample;

import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.WindowManager;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;

import com.github.mikephil.charting.charts.BarLineChartBase.BorderPosition;
import com.github.mikephil.charting.charts.LineChart;
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.interfaces.OnChartGestureListener;
import com.github.mikephil.charting.interfaces.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.Legend;
import com.github.mikephil.charting.utils.Legend.LegendForm;
import com.github.mikephil.charting.utils.LimitLine;
import com.github.mikephil.charting.utils.LimitLine.LimitLabelPosition;
import com.github.mikephil.charting.utils.XLabels;
import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;

import java.util.ArrayList;

public class LineChartActivity extends DemoBase implements OnSeekBarChangeListener,
        OnChartGestureListener, 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);
        mSeekBarY = (SeekBar) findViewById(R.id.seekBar2);

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

        mSeekBarY.setOnSeekBarChangeListener(this);
        mSeekBarX.setOnSeekBarChangeListener(this);

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

        mChart.setUnit(" $");
        mChart.setDrawUnitsInChart(true);

        // 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.setDrawBorder(true);
        mChart.setBorderPositions(new BorderPosition[] {
                BorderPosition.BOTTOM
        });

        // no description text
        mChart.setDescription("");
        mChart.setNoDataTextDescription("You need to provide data for the chart.");

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

        // 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(true);

        // set an alternative background color
        // mChart.setBackgroundColor(Color.GRAY);

        // 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);

        // add data
        setData(45, 100);

        mChart.animateX(2500);

        // // restrain the maximum scale-out factor
        // mChart.setScaleMinima(3f, 3f);
        //
        // // center the view to a specific position inside the chart
        // mChart.centerViewPort(10, 50);

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

        // modify the legend ...
        // l.setPosition(LegendPosition.LEFT_OF_CHART);
        l.setForm(LegendForm.LINE);

        // // dont forget to refresh the drawing
        // mChart.invalidate();
    }

    @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: {

                ArrayList<LineDataSet> sets = (ArrayList<LineDataSet>) mChart.getDataCurrent()
                        .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.getDataCurrent()
                        .getDataSets();

                for (LineDataSet set : sets) {
                    if (set.isDrawCirclesEnabled())
                        set.setDrawCircles(false);
                    else
                        set.setDrawCircles(true);
                }
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleCubic: {
                ArrayList<LineDataSet> sets = (ArrayList<LineDataSet>) mChart.getDataCurrent()
                        .getDataSets();

                for (LineDataSet set : sets) {
                    if (set.isDrawCubicEnabled())
                        set.setDrawCubic(false);
                    else
                        set.setDrawCubic(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.animateX: {
                mChart.animateX(3000);
                break;
            }
            case R.id.animateY: {
                mChart.animateY(3000);
                break;
            }
            case R.id.animateXY: {
                mChart.animateXY(3000, 3000);
                break;
            }
            case R.id.actionToggleAdjustXLegend: {
                XLabels xLabels = mChart.getXLabels();

                if (xLabels.isAdjustXLabelsEnabled())
                    xLabels.setAdjustXLabels(false);
                else
                    xLabels.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();

                //
                // for(int i = 0; i < 10; i++) {
                // mChart.addEntry(new Entry((float) (Math.random() * 100),
                // i+2), 0);
                // mChart.invalidate();
                // }
                //
                // Toast.makeText(getApplicationContext(), "valcount: " +
                // mChart.getDataOriginal().getYValCount() + ", valsum: " +
                // mChart.getDataOriginal().getYValueSum(),
                // Toast.LENGTH_SHORT).show();
                //
                break;
            }
            case R.id.actionSave: {
                if (mChart.saveToPath("title" + System.currentTimeMillis(), "")) {
                    Toast.makeText(getApplicationContext(), "Saving SUCCESSFUL!",
                            Toast.LENGTH_SHORT).show();
                } else
                    Toast.makeText(getApplicationContext(), "Saving FAILED!", Toast.LENGTH_SHORT)
                            .show();

                // mChart.saveToGallery("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()));

        setData(mSeekBarX.getProgress() + 1, mSeekBarY.getProgress());

        // redraw
        mChart.invalidate();
    }

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

    }

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

    }

    private void setData(int count, float range) {

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

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

        for (int i = 0; i < count; i++) {
            float mult = (range + 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
        LineDataSet set1 = new LineDataSet(yVals, "DataSet 1");
        // set1.setFillAlpha(110);
        // set1.setFillColor(Color.RED);

        // set the line to be drawn like this "- - - - - -"
        set1.enableDashedLine(10f, 5f, 0f);
        set1.setColor(Color.BLACK);
        set1.setCircleColor(Color.BLACK);
        set1.setLineWidth(1f);
        set1.setCircleSize(4f);
        set1.setFillAlpha(65);
        set1.setFillColor(Color.BLACK);
        // set1.setShader(new LinearGradient(0, 0, 0, mChart.getHeight(),
        // Color.BLACK, Color.WHITE, Shader.TileMode.MIRROR));

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

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

        LimitLine ll1 = new LimitLine(130f);
        ll1.setLineWidth(4f);
        ll1.enableDashedLine(10f, 10f, 0f);
        ll1.setDrawValue(true);
        ll1.setLabelPosition(LimitLabelPosition.RIGHT);

        LimitLine ll2 = new LimitLine(-30f);
        ll2.setLineWidth(4f);
        ll2.enableDashedLine(10f, 10f, 0f);
        ll2.setDrawValue(true);
        ll2.setLabelPosition(LimitLabelPosition.RIGHT);

        data.addLimitLine(ll1);
        data.addLimitLine(ll2);

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

    @Override
    public void onChartLongPressed(MotionEvent me) {
        Log.i("LongPress", "Chart longpressed.");
    }

    @Override
    public void onChartDoubleTapped(MotionEvent me) {
        Log.i("DoubleTap", "Chart double-tapped.");
    }

    @Override
    public void onChartSingleTapped(MotionEvent me) {
        Log.i("SingleTap", "Chart single-tapped.");
    }

    @Override
    public void onChartFling(MotionEvent me1, MotionEvent me2, float velocityX, float velocityY) {
        Log.i("Fling", "Chart flinged. VeloX: " + velocityX + ", VeloY: " + velocityY);
    }

    @Override
    public void onValueSelected(Entry e, int dataSetIndex) {
        Log.i("Entry selected", e.toString());
    }

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