The smoothing algorithms or spline line series are often used when there is too much of the raw data to show on a screen of a mobile devise. It is important that the charts are easy to read, and the data displayed provides meaningful insides to the picks and trends of the data. In this case the spline series will be the best choice. The android spline lines will give the charts its smooth look, so that the customers can have a great user experience with your android applications.

This example demonstrates how you can create a Spline line for Android in Java using SplineLineRenderableSeries type. With SciChart Android Spline Line API you can also render a gap in series, add point markers onto it and paint spline line segments with different colors.

Read more in the SciChart Android Spline Line Series documentation.

Also see: Spline Band Series and Spline Mountain series.

// Kotlin: SplineLineChartFragment.kt

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2021. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SplineLineChartFragment.kt is part of SCICHART®, High Performance Scientific Charts
// For full terms and conditions of the license, see http://www.scichart.com/scichart-eula/
//
// This source code is protected by international copyright law. Unauthorized
// reproduction, reverse-engineering, or distribution of all or any portion of
// this source code is strictly prohibited.
//
// This source code contains confidential and proprietary trade secrets of
// SciChart Ltd., and should at no time be copied, transferred, sold,
// distributed or made available without express written permission.
//******************************************************************************

package com.scichart.examples.fragments.examples2d.basicChartTypes.kt

import android.view.animation.DecelerateInterpolator
import com.scichart.charting.visuals.SciChartSurface
import com.scichart.data.model.DoubleRange
import com.scichart.examples.fragments.base.ExampleSingleChartBaseFragment
import com.scichart.examples.utils.scichartExtensions.*

class SplineLineChartFragment : ExampleSingleChartBaseFragment() {

    override fun initExample(surface: SciChartSurface) {
        val dataSeries = XyDataSeries<Int, Int>().apply {
            val yValues = intArrayOf(50, 35, 61, 58, 50, 50, 40, 53, 55, 23, 45, 12, 59, 60)
            for (i in yValues.indices) {
                append(i, yValues[i])
            }
        }

        surface.suspendUpdates {
            xAxes { numericAxis { growBy = DoubleRange(0.1, 0.1) }}
            yAxes { numericAxis { growBy = DoubleRange(0.2, 0.2) }}
            renderableSeries {
                splineLineRenderableSeries {
                    this.dataSeries = dataSeries
                    strokeStyle = SolidPenStyle(0xFF006400)

                    sweepAnimation { interpolator = DecelerateInterpolator() }
                }
                fastLineRenderableSeries {
                    this.dataSeries = dataSeries
                    strokeStyle = SolidPenStyle(0xFF4282B4)
                    ellipsePointMarker {
                        setSize(7)
                        strokeStyle = SolidPenStyle(0xFF006400)
                        fillStyle = SolidBrushStyle(0xFFFFFFFF)
                    }

                    sweepAnimation { interpolator = DecelerateInterpolator() }
                }
            }
            chartModifiers { defaultModifiers() }
        }
    }
}

// Java: SplineLineChartFragment.java

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2021. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SplineLineChartFragment.java is part of SCICHART®, High Performance Scientific Charts
// For full terms and conditions of the license, see http://www.scichart.com/scichart-eula/
//
// This source code is protected by international copyright law. Unauthorized
// reproduction, reverse-engineering, or distribution of all or any portion of
// this source code is strictly prohibited.
//
// This source code contains confidential and proprietary trade secrets of
// SciChart Ltd., and should at no time be copied, transferred, sold,
// distributed or made available without express written permission.
//******************************************************************************

package com.scichart.examples.fragments.examples2d.basicChartTypes;

import android.view.animation.DecelerateInterpolator;

import androidx.annotation.NonNull;

import com.scichart.charting.model.dataSeries.IXyDataSeries;
import com.scichart.charting.visuals.SciChartSurface;
import com.scichart.charting.visuals.axes.IAxis;
import com.scichart.charting.visuals.pointmarkers.EllipsePointMarker;
import com.scichart.charting.visuals.renderableSeries.FastLineRenderableSeries;
import com.scichart.charting.visuals.renderableSeries.SplineLineRenderableSeries;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.examples.fragments.base.ExampleSingleChartBaseFragment;

import java.util.Collections;

public class SplineLineChartFragment extends ExampleSingleChartBaseFragment {

    @Override
    protected void initExample(@NonNull SciChartSurface surface) {
        final IAxis xAxis = sciChartBuilder.newNumericAxis().withGrowBy(0.1d, 0.1d).build();
        final IAxis yAxis = sciChartBuilder.newNumericAxis().withGrowBy(0.2d, 0.2d).build();

        final IXyDataSeries<Integer, Integer> dataSeries = sciChartBuilder.newXyDataSeries(Integer.class, Integer.class).build();
        final int[] yValues = {50, 35, 61, 58, 50, 50, 40, 53, 55, 23, 45, 12, 59, 60};
        for (int i = 0; i < yValues.length; i++) {
            dataSeries.append(i, yValues[i]);
        }

        final FastLineRenderableSeries lineSeries = sciChartBuilder.newLineSeries()
                .withDataSeries(dataSeries)
                .withPointMarker(sciChartBuilder.newPointMarker(new EllipsePointMarker()).withSize(7, 7).withStroke(0xFF006400, 1).withFill(0xFFFFFFFF).build())
                .withStrokeStyle(0xFF4282B4, 1f, true)
                .build();

        final SplineLineRenderableSeries rSeries = sciChartBuilder.newSplineLineSeries()
                .withDataSeries(dataSeries)
                .withStrokeStyle(0xFF006400, 2f, true)
                .build();

        UpdateSuspender.using(surface, () -> {
            Collections.addAll(surface.getXAxes(), xAxis);
            Collections.addAll(surface.getYAxes(), yAxis);
            Collections.addAll(surface.getRenderableSeries(), rSeries, lineSeries);
            Collections.addAll(surface.getChartModifiers(), sciChartBuilder.newModifierGroupWithDefaultModifiers().build());

            sciChartBuilder.newAnimator(rSeries).withSweepTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
            sciChartBuilder.newAnimator(lineSeries).withSweepTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
        });
    }
}

< BACK TO ALL ANDROID CHART CHART EXAMPLES