Questions

We are using single SurfaceMeshRenderableSeries3D chart and added multidata on condition click event but issue is sometime data is loaded or sometime not. So my question is how to refresh 3D chart after added new data ?

Hello,

At right chart we have show only one X-axis which needs to update in real time .whenever new values will come we have to update in X-axis in itself instead of adding new line at X-Axis.

Each time New Y – axis will come that will append at left chart (Can be consider left chart showing history of right chart)

Let me know if anything further requred

Thanks.

Hello Friends ,

   Sync two Chart in Android Bottom chart can be change on top chart touch

We are looking a solution where we want show two chart at Top and Bottom in Android Screen.based on Top chart changed by gesture /finger touch should be expend/shrink like zoom in and out bottom chart

Assume at top chart data range has between 0 to 3,00,000 , I want to capture in bottom chart only selected/touched part in with expanded form.

I have attached below screen shot which may be helpful.

Solution can be like this but not able to get code for this implementation

https://blog.scichart.com/content/images/2021/06/Navigate-ECG-strip-with-Pocket-ECM.gif

https://blog.scichart.com/android-app-to-view-long-term-ecg-signals/

I appreciate any help regarding this issue.

Hello Friends,

I'm looking a solution where i can change Y-Axis range in between (0.1,0.2,0.4,0.6,0.8,1.0) .

I appreciate any help for above question

Thanks
Vasim

Hi,

Can you please tell me do you have tool like https://www.scichart.com/documentation/win/current/webframe.html#Fibonacci%20Retracement%20Drawing%20Tool.html
on Android?
If not, please give me a sample code on how to implement this with scichart.
Thanks in advance.

Regards,
Batyr

I would like to add scroll listener on x axis title. Is it possible to add scroll to axis title

I try to make a text formatting for my chart on IOS and Android, regarding your documentation:

IOS:
https://www.scichart.com/documentation/ios/current/axis-labels—textformatting-and-cursortextformatting.html
yAxis.textFormatting = “$0.0”

Android:
https://www.scichart.com/documentation/android/current/Axis%20Labels%20-%20TextFormatting%20and%20CursorTextFormatting.html
yAxis.setTextFormatting(“$0.0000”);

I checked my code and its the same like yours. On Android i have:

// yAxis filed with type IAxis
private IAxis yAxis;

// create
yAxis = sciChartBuilder
.newNumericAxis()
.withGrowBy(0.01d, 0.1d)
.withDrawLabels(true)
.withDrawMajorGridLines(true)
.withDrawMinorGridLines(false)
.withDrawMajorBands(false)
.withDrawMajorTicks(false)
.build();

// the set textFormatting:
yAxis.setTextFormatting(“$0.0000”);

On IOS i have:

var yAxis: SCINumericAxis?
self.yAxis = SCINumericAxis()
self.yAxis?.textFormatting = “$0.0”

But it is not working, can you tell me please why? What I’m doing wrong?

Hi,

I want to change the colormap so that the:
– minimum (blue) = 4095
– maximum (red) = 800

Also, I want to set 0 to either black or transparent.

I can easily change the min and max values, just wanting to change the color limit and set 0 = black.

Here is my code for creating the heatmap:

public void heatmap(){
    // Create a SciChartSurface
    SciChartSurface surface = new SciChartSurface(this);
    // Get a layout declared in "activity_main.xml" by id
    LinearLayout chartLayout = findViewById(R.id.chart_layout);
    // Add the SciChartSurface to the layout
    chartLayout.addView(surface);
    // Initialize the SciChartBuilder
    SciChartBuilder.init(this);
    // Obtain the SciChartBuilder instance
    final SciChartBuilder sciChartBuilder = SciChartBuilder.instance();
    final NumericAxis xAxis = sciChartBuilder.newNumericAxis()
            .withGrowBy(0.1, 0.1)
            .build();
    final NumericAxis yAxis = sciChartBuilder.newNumericAxis()
            .withGrowBy(0.1, 0.1)
            .build();
    final FastUniformHeatmapRenderableSeries heatmapRenderableSeries = sciChartBuilder.newUniformHeatmap()
            .withMinimum(4095)
            .withMaximum(800)
            .withCellTextStyle(sciChartBuilder.newFont().withTextSize(8).withTextColor(ColorUtil.White).build())
            .withDrawTextInCell(true)
            .withDataSeries(createDataSeries())
            .build();
    final SciChartSurface chart = surface;
    Collections.addAll(chart.getXAxes(), xAxis);
    Collections.addAll(chart.getYAxes(), yAxis);
    Collections.addAll(chart.getRenderableSeries(), heatmapRenderableSeries);
    Collections.addAll(chart.getChartModifiers(), sciChartBuilder.newModifierGroupWithDefaultModifiers().build());
}

i have been working on line charts and i need to show date as well as time on the axis( 21 june 08 05:30:PM like this).I’ve tried with date axis and numeric axis ,but it doesn’t helps.Do we have any suggestions or samples which could help me

I’m trying to implement sciChart to flutter app (Android). It gets pretty confusing when trying to make it work. Anyone have examples how to make SciChart to work on Flutter? Adding the license works just fine. Only need for ECG chart for now. Thanks.

I have a line chart and need to implement textAlign: left property for tickLabel on yAxis. I have found some way to do it on the forum, but it does not work in my case:
xAxis.setAxisTickLabelStyle(new AxisTickLabelStyle(Gravity.CENTER, Layout.Alignment.ALIGN_CENTER, 5, 0, 5, 0));
I get the error:
Alignment cannot be converted to int
But according documentation https://www.scichart.com/documentation/android/current/SciChart.Charting~com.scichart.charting.visuals.axes.AxisTickLabelStyle~_ctor.html AxisTickLabelStyle class get 5 int arguments. Can you help me please how to solve it!

I’m evaluating chart libraries to my next project and I’m trying to do a simple chart like the one in the attached image.
It was actually very easy to do it using MPAndroidChart, however it’s been hard to do a simple task like put a label aligned with the column… I did take a look into the SciChart sample application, but the application just uses numeric labels…
Can someone provide some guidance of how to do this?

Hello!
I’m trying to migrate OhlcDataSeries from Double to more accurate BigDecimal on Android.
But I faced with an issue that “GenericClass doesn’t support class”

How can I fix it?
I want to use BigDecimal with chart.

Thank you

Hi,

I have a list of 12 items, but at the start I only want to see the last 6 items on the chart (stacked column chart). I want to be able to scroll / drag to reveal the first part of the list. I use the index of the list for the x-axis, so the list has indexes with range from [0, 11]

I’m having some weird behaviour implementing this.
When the data is loaded, i see the complete bars:

but when I start to scroll, i’m never able to reveal the complete bars anymore:
![Screenshot 2020-09-18 at 11.04.40.png][2]
![Screenshot 2020-09-18 at 11.04.59.png][3]

When i start scrolling to the end (although the chart is already at the end), the UI jumps and only shows half a bar. Also when i scroll to the beginning, it only shows half a bar.

How can I make sure I always see the complete bars?

This is the code, specific to the x axis & the scrolling:

val xAxis = sciChartBuilder.newNumericAxis()
            .withDrawMajorBands(false)
            .withDrawMajorGridLines(false)
            .withDrawMinorGridLines(false)
            .withDrawMinorTicks(false)
            .withMajorDelta(1.0)
            .withMinorDelta(0.2)
            .withAutoTicks(false)
            .withVisibleRange(5.5, 11.5)
            .build()

using half values for the range seems to be the only way I can see the full bars. Once I start scrolling I only see half bars at the start & end

val surfaceChartModifiers: ChartModifierCollection = chart.chartModifiers
val dragModifier = XAxisDragModifier()
dragModifier.dragMode = AxisDragModifierBase.AxisDragMode.Pan
surfaceChartModifiers.add(dragModifier)

val zoomPanModifier = ZoomPanModifier()
zoomPanModifier.clipModeX = ClipMode.ClipAtExtents
zoomPanModifier.direction = Direction2D.XDirection
zoomPanModifier.zoomExtentsY = false
surfaceChartModifiers.add(zoomPanModifier)

Hello

I have this chart with CategoryXAxis` as X and **NumericAxis as Y. I update its IohlcDataseries with new prices for creating a live chart. I also added a HorizontalLineAnnotation on Y-Axis to point to the current price. The problem is when chart auto-scales on Y-axis it only tries to cover price data and not the Line annotation, and its label is half visible.

Hi
I have a ECG chart with a certain capacity.
I want to apply the fading animation to the part of the chart that is being cleared.

Hi
I have a line chart that has already been drawn and synced with a sound.
when we play sound, chart begin to scroll horizontally.
but problem is lagging when scrolling chart.
Is there a way to fix this problem?

private Runnable mRunnable = new Runnable() {
    @Override
    public void run() {
        forceRunInPauseMode = false;

        getActivity().runOnUiThread(() -> {
            currentTime = (int) exoPlayer.getCurrentPosition();
            binding.tvCurrentDuration.setText(MiliToTimeConverter.milliToTime(currentTime));
        });

        int currentRange = currentTime * 2;


        if (!isDraw) {
            DoubleValues xValues = new DoubleValues(Arrays.copyOfRange(xDoubleArray, 0, xDoubleArray.length - 1));
            DoubleValues yValues = new DoubleValues(Arrays.copyOfRange(yDoubleArray, 0, yDoubleArray.length - 1));
            DoubleSeries doubleSeries = new DoubleSeries(xValues, yValues);
            lineData.append(doubleSeries.getxValues(), doubleSeries.getyValues());
            isDraw = true;
        }
        xVisibleRange.setMinMax(currentRange - visibleInterval / 2, currentRange + visibleInterval / 2);
    }
};

private void updateChart() {
    schedule = scheduledExecutorService.scheduleWithFixedDelay(() -> {
        if (!isPlaying && !forceRunInPauseMode)
            return;
        UpdateSuspender.using(binding.sciChart, mRunnable);
    }, 0, TIME_INTERVAL, TimeUnit.MILLISECONDS);
}


private void pause() {
    exoPlayer.setPlayWhenReady(false);
    binding.ivPlay.setImageResource(R.drawable.ic_play);
    if (schedule != null)
        schedule.cancel(false);
}

private void initSciChart() {

    isChartConfigured = true;
    SciChartBuilder.init(getContext());
    binding.sciChart.setBackgroundColor(getResources().getColor(R.color.colorTransparent));

    // Obtain the SciChartBuilder instance
    SciChartBuilder mSciChartBuilder = SciChartBuilder.instance();

    //set border style
    binding.sciChart.setRenderableSeriesAreaBorderStyle(null);

    xVisibleRange = new DoubleRange();

    // Create a numeric X axis
    final IAxis xAxis = mSciChartBuilder.newNumericAxis()
            .withVisibleRange(xVisibleRange)
            .withGrowBy(new DoubleRange(0.25d * visibleInterval / totalDuration, 0.25d * visibleInterval / totalDuration))
            .withAutoRangeMode(AutoRange.Never)
            .build();

    final IAxis yAxis = mSciChartBuilder.newNumericAxis()
            .withVisibleRange(-1d, 1d)
            .withAutoRangeMode(AutoRange.Never)
            .build();

    xAxis.setVisibleRangeChangeListener((iAxisCore, oldRange, newRange, isAnimating) -> {
        if (!isPlaying) {
            double c = ((newRange.getMinAsDouble() + newRange.getMaxAsDouble()) / 4);
            getActivity().runOnUiThread(() -> binding.tvCurrentDuration.setText(MiliToTimeConverter.milliToTime((long) c)));
        }
    });


    xAxis.setDrawMajorGridLines(false);
    xAxis.setDrawMinorGridLines(false);
    xAxis.setDrawMajorBands(false);
    xAxis.setDrawMajorTicks(true);
    xAxis.setDrawMinorTicks(true);
    xAxis.setTickProvider(new CustomTickProvider());
    xAxis.setMaxAutoTicks(MAX_AUTO_TICKS);
    xAxis.setMinorsPerMajor(MINOR_PER_MAJOR);
    xAxis.setVisibility(View.GONE);


    yAxis.setDrawMajorGridLines(false);
    yAxis.setDrawMinorGridLines(false);
    yAxis.setDrawMajorBands(false);
    yAxis.setDrawMajorTicks(false);
    yAxis.setDrawMinorTicks(false);
    yAxis.setTickProvider(new CustomTickProvider());
    yAxis.setMaxAutoTicks(MAX_AUTO_TICKS);
    yAxis.setMinorsPerMajor(MINOR_PER_MAJOR);
    yAxis.setVisibility(View.GONE);


    VerticalLineAnnotation verticalLine = mSciChartBuilder.newVerticalLineAnnotation()
            .withX1(0.5)   // black
            .withStroke(new SolidPenStyle(ColorUtil.argb(250, 120, 126, 136), true, 1f, null))
            .withCoordinateMode(AnnotationCoordinateMode.RelativeX)
            .build();

    ModifierGroup chartModifiers = mSciChartBuilder.newModifierGroup()
            .withModifier(new GestureModifierBase() {
                @Override
                public void detach() {
                    super.detach();
                }

                @Override
                public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                    return false;
                }

                @Override
                public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                    // Scroll X
                    xAxis.scroll((-distanceX/2), ClipMode.ClipAtExtents);

                    return true;
                }
            })
            .build();

    lineData = mSciChartBuilder.newXyDataSeries(Double.class, Double.class).build();
    XyDataSeries staticData = mSciChartBuilder.newXyDataSeries(Double.class, Double.class).build();

    final FastLineRenderableSeries lineSeries = mSciChartBuilder.newLineSeries()
            .withDataSeries(lineData)
            //.withPointMarker(mSciChartBuilder.newPointMarker(new EllipsePointMarker()).withSize(7, 7).withStroke(0xFF006400, 1).withFill(0xFFFFFFFF).build())
            .withPaletteProvider(new XYCustomPaletteProvider(ColorUtil.argb(255, 50, 153, 0))) // green
            .withStrokeStyle(ColorUtil.argb(250, 120, 126, 136), 1f, true) // black
            .build();

    final IRenderableSeries staticLineSeries = mSciChartBuilder.newLineSeries()
            .withDataSeries(staticData)
            .withPaletteProvider(new XYCustomPaletteProvider(ColorUtil.argb(255, 50, 153, 0))) // green
            .withStrokeStyle(ColorUtil.argb(250, 120, 126, 136), 1f, true) // black
            .build();

    DoubleValues xValues = new DoubleValues(Arrays.copyOfRange(xDoubleArray, 0, totalRange));
    DoubleValues yValues = new DoubleValues(Arrays.copyOfRange(yDoubleArray, 0, totalRange));
    DoubleSeries doubleSeries = new DoubleSeries(xValues, yValues);

    binding.sciChart.getRenderableSeries().add(lineSeries);
    binding.sciChart.getRenderableSeries().add(staticLineSeries);

    binding.sciChart.setRenderSurface(new RenderSurface(getContext()));

    Collections.addAll(binding.sciChart.getYAxes(), yAxis);
    Collections.addAll(binding.sciChart.getXAxes(), xAxis);
    Collections.addAll(binding.sciChart.getChartModifiers(), chartModifiers);
    Collections.addAll(binding.sciChart.getAnnotations(), verticalLine);

    staticData.append(doubleSeries.getxValues(), doubleSeries.getyValues());
    lineData.setAcceptsUnsortedData(true);

    begin();
}

Hi, I want to draw a chart like the attached image.

This is a chart with XyDataSeries, it show as vertical line at each data point and verticle line is a dotted line in order to separated from other series.
Since the OHLC chart will have the open, close on the data point and an impulse chart is forced to draw from an axis, is there any better way that can achieve a series like this? Thank you!

I set a rolloverModifier to a CandlestickSeries, but I can not find a API to hide RolloverMarker,I only find a article about WPF(https://www.scichart.com/documentation/v5.x/webframe.html#RolloverModifier.html)， how could I hide RolloverMarker or change the style of RolloverMarker in Android?

Hello

I was wondering if it would be possible to create a simple clean looking chart like described in the attached image. I am looking for a “SuccessRateChart” that has some similarity to the PieChart but does not use the whole circle to describe its content. I would also need a way to adjust the visible radius of the Pie. In means of information visualization you often hear the term “doughnut chart”…

On way could be to draw some circle stacked over the chart itself, but there should be a better solution.

Would love to hear from you,

Kind regards,
Stephan

Hello,

Let me first describe the issue we have and why I think a possible solution would be to catch the double tap event.

Our chart consists of 6 series. We have an X axis that shows timestamps and 5 Y axis’ for different data like pressure value, temperature, etc. which are of type double. Additionally under the chart we have a legend that displays these 5 Y axis series (one series per one Y axis) with ability to change the visibility of the series and axis.

The problem occurred when as an example, temperature values throughout are constant, e.g. 24.5. The line gets drawn and it is a stable line. Axis is also displayed. However, when a user does the double tap gesture on the chart surface, which usually resets the zoom extents, the axis that has static/non-changing values does some sort of re-initialize animation and after several of double tab gestures only axis label remains (minor and major ticks disappear).

If I could catch the double tap gesture event and override it I could for example say that if the data is static don’t do anything. However, I don’t know where this event is and how to override it.

Any help would be much appreciated.

Thank you.
Regards,
Paul.

Good morning,

I would like to ask you about the solution contained in the title. Is it possible to create realtime charts (for example 7-10) in a list (RecyclerView)? I have studied your example but there were none with a list.

The fragment in the example called createMultiPaneStockChartsFragment contains 4 charts. But unfortunately, it is not a list.
I made a simple activity with 5 charts in a RecyclerView, but charts are stucking a bit.
I do not call notify methods. There is only update LineData method:

oneChartClass.getLineData().append(oneChartClass.getLineData().getCount(), trendPoint.getValue());

Thanking you in advance…
Hubert

So I am trying to set paddings on the chart, so that the data series do not touch chart edges

I can’t do it with View’s method setPadding because then the black background is present (screenshot shows padding on all sides but I need just left and right)

Also, I managed to achieve no labels, axes, grids etc. but in totally hacky way; I set .withIsCenterAxis and then all other things to false

 .withAxisId(Y_AXIS_ID)
        .withDrawMajorBands(false)
        .withDrawMajorGridLines(false)
        .withDrawMinorGridLines(false)
        .withDrawLabels(false)
        .withIsCenterAxis(true)
        .withDrawMajorTicks(false)
        .withDrawMinorTicks(false)

Is there a normal way of doing this?

thanks

Hi all,

Why the API’s for iOS, Android and WPF are not identically?
I have seen many samples on the forum, but to adapt it to a different platform is very hard.
A lot of classes are different for each platform.

• Is there any “comparison” for the different platforms?
• Is this planned to unify the API’s?

Regards
Urs

Hi, i want to make something like that : https://i.ibb.co/617TmD2/screenshot-line.png

I have tried HorizontalLineAnnotation but i successed to have it only on bottom graph : https://i.ibb.co/qsCjjGd/screen-bot-graph.png

Here how i initialize my top graph :

@Override
public void initGraph(Context context) {
    Log.d(TAG, "initGraphs");
    SciChartSurface spectogramSciChart = new SciChartSurface(context);
    spectogram.addView(spectogramSciChart);

    xAxis = new NumericAxis(context);
    xAxis.setAutoRange(AutoRange.Always);
    xAxis.setDrawMinorTicks(false);
    xAxis.setDrawMajorBands(false);
    xAxis.setDrawMinorGridLines(false);
    xAxis.setAxisAlignment(AxisAlignment.Left);
    xAxis.setFlipCoordinates(true);
    xAxis.setAxisTitle("Frequences (KHz)");
    xAxis.setAxisTitleOrientation(AxisTitleOrientation.VerticalFlipped);
    spectogramSciChart.getXAxes().add(xAxis);


    yAxis = new NumericAxis(context);
    yAxis.setVisibleRange(new DoubleRange(startSpectrogramRange, endSpectrogramRange));
    yAxis.setDrawLabels(false);
    yAxis.setDrawMinorTicks(false);
    yAxis.setDrawMajorBands(false);
    yAxis.setDrawMinorGridLines(false);
    yAxis.setAxisAlignment(AxisAlignment.Bottom);
    yAxis.setFlipCoordinates(true);
    yAxis.setAxisTitleOrientation(AxisTitleOrientation.Horizontal);
    spectogramSciChart.getYAxes().add(yAxis);

    FastUniformHeatmapRenderableSeries f = new FastUniformHeatmapRenderableSeries();
    scichartTools.getSpectrogramDS().setStartX(0f);
    scichartTools.getSpectrogramDS().setStepX(0.9f);
    f.setDataSeries(scichartTools.getSpectrogramDS());
    f.setMaximum(100);
    f.setMinimum(-30.0);
    f.setColorMap(new ColorMap(
            new int[]{ColorUtil.Transparent, ColorUtil.DarkBlue, ColorUtil.Purple, ColorUtil.Red, ColorUtil.Yellow, ColorUtil.White},
            new float[]{0f, 0.0001f, 0.25f, 0.50f, 0.75f, 1f}
    ));

    spectogramSciChart.getRenderableSeries().add(f);
    scichartTools.getSpectrogramValues().setSize(scichartTools.getFftSize() * scichartTools.getBatchSize() * 2);

    // I add the line but it's not displayed
    HorizontalLineAnnotation horizontalLine = new HorizontalLineAnnotation(context);
    horizontalLine.setHorizontalGravity(Gravity.FILL_HORIZONTAL);
    horizontalLine.setY1(5f);
    horizontalLine.setLabelValue("Label");
    spectogramSciChart.getAnnotations().add(horizontalLine);
}

You can see at the bottom of the function that i added it, but it doesn’t work on this graph. Why ? Maybe the graph is drawing over my line ?

Thanks,
Best regards

Hi, i am developping a spectogram, screenshot : https://i.ibb.co/7CPTZbg/screenshot-framed.png

I get the same result from your showcase, now there is some things i want to change but can’t resolve to know how to :
– How can i change data direction to spread from left to right ? (currently right to left)
– How can i clear FastUniformHeatmapRenderableSeries ? Method clear doesn’t work
– How can we set width of FastUniformHeatmapRenderableSeries’s layout to be fixed to a specific seconds number ? (example : there is 10 seconds of data between left and right)

Thank you,
Wavely

Hi,

I have 3 separate line series and 1 column bar series. Whenever I switch between activities, Column bar data and range persist but not for the line series.

Whenever I return back from activityB to ActivityA it never calls restoreInstanceState. How can I persist the states of these graph?

Snap short attached for reference.

—–code,

initChartUI() {

    SciChartBuilder.init(mContext)
    sciChartBuilder = SciChartBuilder.instance()

    xyIapDataSeries =
            sciChartBuilder.newXyDataSeries(Date::class.javaObjectType, Short::class.javaObjectType)
                .withSeriesName(getString(R.string.label_iap)).build()

    xyTempDataSeries =
            sciChartBuilder.newXyDataSeries(Date::class.javaObjectType, Short::class.javaObjectType)
                .withSeriesName(getString(R.string.label_temperature)).build()

    xyUoDataSeries =
            sciChartBuilder.newXyDataSeries(Date::class.javaObjectType, Short::class.javaObjectType)
                .withSeriesName(getString(R.string.label_uo)).build()

    xyRrDataSeries =
            sciChartBuilder.newXyDataSeries(Date::class.javaObjectType, Short::class.javaObjectType)
                .withSeriesName(getString(R.string.label_respiratory_rate)).build()

    initChartIap(iap_chart)
    initChartUo(uo_chart)
    initChartTemp(temperature_chart)
    initChartRR(resp_rate_chart)

}

private fun initChartIap(surface: SciChartSurface) {
val xAxis = sciChartBuilder.newCategoryDateAxis()
.withBarTimeFrame(SECONDS_IN_FIVE_MINUTES.toDouble())
.withDrawMinorGridLines(false)
.withGrowBy(0.0, 0.5)
.build()
val yAxis = sciChartBuilder.newNumericAxis().withAutoRangeMode(AutoRange.Always).build()

    val line = sciChartBuilder.newLineSeries().withStrokeStyle(R.color.accuryn_blue, STROKE_THICKNESS)
        .withDataSeries(xyIapDataSeries).build()

    // Create a Stroke Pen and assign it
    val strokePen = SolidPenStyle(resources.getColor(R.color.accuryn_blue, null), true, 2f, null)
    line.strokeStyle = strokePen

    UpdateSuspender.using(surface) {
        Collections.addAll(surface.xAxes, xAxis)
        Collections.addAll(surface.yAxes, yAxis)
        Collections.addAll<BaseRenderableSeries>(surface.renderableSeries, line)
        Collections.addAll<AxisMarkerAnnotation>(surface.annotations, iapAxisMarker)
        Collections.addAll(
            surface.chartModifiers, sciChartBuilder.newModifierGroup()
                .withXAxisDragModifier().build()
                .withZoomPanModifier().withReceiveHandledEvents(true).withXyDirection(Direction2D.XDirection).build()
                .withPinchZoomModifier().build()
                .build()
        )
    }

……
rest 3 other types….
…..
override fun onSaveInstanceState(outState: Bundle) {

    outState.run {
        putInt("count", xyIapDataSeries.count)
        putInt("uoCount", xyUoDataSeries.count)
        putInt("tempCount", xyTempDataSeries.count)
        putInt("rrCount", xyRrDataSeries.count)

        val iapRange = iap_chart.xAxes[0].visibleRange
        val uoRange = uo_chart.xAxes[0].visibleRange
        val tempRange = temperature_chart.xAxes[0].visibleRange
        val rrRange = resp_rate_chart.xAxes[0].visibleRange

        putDouble("rangeIapMin", iapRange.getMinAsDouble())
        putDouble("rangeIapMax", iapRange.getMaxAsDouble())
        putDouble("rangeUoMin", uoRange.getMinAsDouble())
        putDouble("rangeUoMax", uoRange.getMaxAsDouble())
        putDouble("rangeTempMin", tempRange.getMinAsDouble())
        putDouble("rangeTempMax", tempRange.getMaxAsDouble())
        putDouble("rangeRrMin", rrRange.getMinAsDouble())
        putDouble("rangeRrMax", rrRange.getMaxAsDouble())
    }
    super.onSaveInstanceState(outState)
}

override fun onPostCreate(savedInstanceState: Bundle?) {
super.onPostCreate(savedInstanceState)

    updateIapData(savedInstanceState)
    updateUoData(savedInstanceState)
    updateTempData(savedInstanceState)
    updateRRData(savedInstanceState)
}

override fun onRestoreInstanceState(savedInstanceState: Bundle?) {
    super.onRestoreInstanceState(savedInstanceState)
     updateIapData(savedInstanceState)
    updateUoData(savedInstanceState)
    updateTempData(savedInstanceState)
    updateRRData(savedInstanceState)
}

private fun updateIapData(savedInstanceState: Bundle?) {
UpdateSuspender.using(iap_chart) {
var count = DEFAULT_POINT_COUNT
if (savedInstanceState != null) {
count = savedInstanceState.getInt(“count”)

            val rangeMin = savedInstanceState.getDouble("rangeIapMin")
            val rangeMax = savedInstanceState.getDouble("rangeIapMax")

            iap_chart.xAxes[0].visibleRange.setMinMaxDouble(rangeMin, rangeMax)
        }

        val iap = mutableListOf<Short>()
        val date = mutableListOf<Date>()
        for (entry in mSimplifiedDataList) {
            if (entry.emr.iap > 0) {
                iap.add(entry.emr.iap)
                date.add(Date(DateTimeUtils.toEpochMilli(entry.getRtcTimeStamp())))
            } else {
                iap.add(0)
                date.add(Date(DateTimeUtils.toEpochMilli(entry.getRtcTimeStamp())))
            }
        }
        tv_iap_input_data.text = iap[iap.size.minus(1)].toString()
        xyIapDataSeries.append(date, iap)
    }
}

……rest other for updating data over UI.

hi everyone
when i use utf8 string such as ‘محور’ = axis in persian sciChart lookLike this .
i tried different fonts but did not work .

 SciChartBuilder.init(this@Main2Activity)

    // Obtain the SciChartBuilder instance
    val sciChartBuilder = SciChartBuilder.instance()

    val myCustomFont: Typeface? = ResourcesCompat.getFont(this, R.font.maryam)
    val fontStyle = FontStyle(myCustomFont, 50f, Color.RED)

    val s = String("محور".toByteArray(Charsets.UTF_8))

    xAxis = sciChartBuilder.newNumericAxis().withAxisTitleStyle(fontStyle).withAxisTitle(s).withGrowBy(DoubleRange(0.1, 0.1)).build()
    yAxis = sciChartBuilder.newNumericAxis().withAxisTitle("this is y").withGrowBy(DoubleRange(0.1, 0.1)).build()

    val dataSeries = XyDataSeries(Double::class.javaObjectType, Double::class.javaObjectType)
    dataSeries.append(arrayOf(0.0, 2.0, 4.0, 6.0, 8.0, 10.0), arrayOf(1.0, 5.0, -5.0, -10.0, 10.0, 3.0))

    rs = sciChartBuilder.newColumnSeries()
            .withDataSeries(dataSeries)
            .withStrokeStyle(ColorUtil.White, 3f, false)
            .build()

    surface.chartModifiers.add(sciChartBuilder.newModifierGroupWithDefaultModifiers().build())

    UpdateSuspender.using(surface) {
        Collections.addAll<IAxis>(surface.xAxes, xAxis)
        Collections.addAll<IAxis>(surface.yAxes, yAxis)
        Collections.addAll<FastColumnRenderableSeries>(surface.renderableSeries, rs)

    }

and the result :

result image

We’d like to customize the look of our legends. We have 4 legends displaying different data, but right now the only thing we can change is the Theme. Is there any way to customize the legend items, like add some icons, change the point marker shape and size, change the check box icon etc…

P.S.: I’m not a trial user. We have an iOS, Android and WPF licenses purchased.

Project info:
Xamarin.Android
SciChart.Android 2.2.2.854

Version
2.2.2.854

I have a question about the scichart performance. I need to display a lot of data on the real time chart and above 2400000 values the chart crops and reacts very slowly. It was tested on Samsung s7. Does scichart handle that much data on devices? Is there any minimum phone performance requirements?

Hi,

Let me explain the structure of attached views. Default view state is https://imgur.com/a/zqAqpXp .

<VerticalViewPager>
    <FirstPagedFragment>
         <TradingViewFragment>
             <WebView />
         </TradingViewFragment>
         <SciChartFragment>
             <com.scichart.charting.visuals.SciChartSurface />
         </SciChartFragment>
    </FirstPagedFragment>
    <SecondPagedFragment> 
           ... 
    </ SecondPagedFragment>
</VerticalViewPager>

When FirstPagedFragment is dragged, SecondPagedFragment becomes displayed. You can see it on https://imgur.com/a/2VqZ1HY

The problem is the chart becomes disappeared when ViewPager is on changing state. Here is another link : https://imgur.com/a/xDO6Xtx

It is happened on [Samsung Galaxy S9, API 26] and [Xiaomi Mi A1, API 25] and I did not update displayMetric of chart.
Is there any configuration to fix this issue? Thanks.

All images are attached.

This issue repros on Android 4.4 API 19, but not API 27. It happens with the example project (Multi-Pane Stock Charts). The issue is that on certain zoom levels, the x-axis labels are cut off (so instead of displaying 11 Mar, it just displays 11).

I have tried to override TradeChartAxisLabelFormatter with my custom implementation but saw the same issue, so the bug seems to be in the provider or somewhere else.

Please see screenshot: https://imgur.com/a/2RDC2MZ

When using GLTextureView on Android 4.4 API 19, there are a few issues. The same issue does not occur on API 27. Have not tested other API levels. If you do not use GLTextureView, this issue doesn’t happen (but due to theming bugs I have to use GLTextureView and not the other 2 types of render surfaces).

1. If activity A has a SciChartSurface and activity B has a SciChartSurface and appears above activity A, then the surface in A dissapears (Shows blank) when you return to it. 100% repro for me. Let me know if you need more info.

2. Due to 1? If you try to re-render the chart on activity A, it will lead to an ANR (app freezes indefinitely) after a few times (see below)

3. Even if you don’t have activity B and only activity A, if you interact with it a few times and show/hide it, it will lead to an ANR (app freezes indefinitely) as well (see below):

ANR log (it freezes the app until you kill it):

09-03 13:01:40.583 1690-1705/system_process E/ActivityManager: ANR in co..stocks (co..stocks/.ui.screens.home.MainActivity)
PID: 12076
Reason: Input dispatching timed out (Waiting because the touched window has not finished processing the input events that were previously delivered to it.)
Load: 0.64 / 0.49 / 0.39
CPU usage from 6217ms to 779ms ago: