Category: Android

Hi,

I am showing multiple chats in multiple pages in a loop viewPager but the license key is not recognised in some pages. This happens with no particular pattern to it. It sometimes disappears when I relaunch the app. Then again if I do the same it reappears.

Hi,

I want to draw the shape of the waveform that stretches out from one point.
I tested it using ‘CreateEllipsoidMesh3DChartFragment’ from example source, but I found problem.

I initialized the displacement value to 0, and entered the displacement value of the point I wanted.
In the image I uploaded, the coordinates are symmetrical, but the shape is different.

Is there a rule that connects coordinates when you draw a triangle?
Is there any way I can control this?

I have attached the image and code.

best regards, Thank you

Hi,

I’m evaluating SciChart for use in a production app.

Is there any way to log exceptions generated by SciChart? Currently I’m logging all handled and unhandled exceptions in my app to my server so that issues can be flagged without users having to manually submit support tickets. SciChart is printing internal exceptions to console – is there any way to override that with our own error handling mechanism? If not, how should we monitor for production errors generated internally by SciChart?

Thanks

Hi,
I downloaded your Android Examples project to evaluate whether it’ll be a good fit for real time updates.
Replaced SetRunTimeLicenseKey call with my trial keys.
Designer time window displays Sorry!you have not set a LicenseKey message.
RunTime displays your trial license expired.

Any help on this would be great.

Thanks

I crashed when I was quick to show and hide the content of the chart。

The source code is similar to the following：

public void show(){
if(!surface.getRenderableSeries().contains(lineUpSeries)) {
Collections.addAll(surface.getRenderableSeries(), lineUpSeries);
Collections.addAll(surface.getRenderableSeries(), lineDownSeries);
Collections.addAll(surface.getRenderableSeries(), line20Series);
Collections.addAll(surface.getAnnotations(), upTextMarker);
Collections.addAll(surface.getAnnotations(), downTextMarker);
Collections.addAll(surface.getAnnotations(), ma20TextMarker);
Collections.addAll(surface.getAnnotations(), upAxisMarker);
Collections.addAll(surface.getAnnotations(), downAxisMarker);
Collections.addAll(surface.getAnnotations(), ma20AxisMarker);
}
}
public void hide(){
if(surface.getRenderableSeries().contains(lineUpSeries)) {
surface.getRenderableSeries().remove(lineUpSeries);
surface.getRenderableSeries().remove(lineDownSeries);
surface.getRenderableSeries().remove(line20Series);
surface.getAnnotations().remove(upTextMarker);
surface.getAnnotations().remove(downTextMarker);
surface.getAnnotations().remove(ma20TextMarker);
surface.getAnnotations().remove(upAxisMarker);
surface.getAnnotations().remove(downAxisMarker);
surface.getAnnotations().remove(ma20AxisMarker);
}
}

error log：

java.lang.NullPointerException: Attempt to invoke interface method ‘boolean com.scichart.charting.visuals.annotations.IAnnotationPlacementStrategy.isInBounds(com.scichart.charting.visuals.annotations.AnnotationCoordinates, com.scichart.charting.visuals.annotations.IAnnotationSurface)’ on a null object reference
at com.scichart.charting.visuals.annotations.AnnotationBase.a(SourceFile:1207)
at com.scichart.charting.visuals.annotations.AnnotationBase.update(SourceFile:1105)
at com.scichart.charting.visuals.annotations.AxisMarkerAnnotation.update(SourceFile:246)
at com.scichart.charting.visuals.annotations.AnnotationBase.update(SourceFile:1083)
at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.a(SourceFile:327)
at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.a(SourceFile:218)
at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.a(SourceFile:132)
at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.onDraw(SourceFile:123)
at com.scichart.drawing.opengl.RenderSurfaceGL$a.onDraw(SourceFile:228)
at com.scichart.drawing.opengl.MyGLRenderer.b(SourceFile:293)
at com.scichart.drawing.opengl.MyGLRenderer.onDrawFrame(SourceFile:277)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1548)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1259)

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

How to reduce size of colored rectangle of the legends ?

Hi
Is there a way to just change the values of the pie segments so it get updated on the donut chart.
If I remove and add the pie segments again it works, is this the correct way?

Also I can’t find any documentation around the donut for android/xamarin

regards
Per

Is there an convenient way to convert an existing IXyDataSeries<Date, Double> to IOhlcDataSeries<Date, Double> ?
How do Scichart collapse Candlesticks (and presumably merging with neighbouring candlesticks) when its very zoomed out e.g. 1 year period

Hi team,
Im using scicharts inside recyclerview and for some reasons im getting out of memory exception while loading or scrolling through the list.I’m not getting the issue everytime the page loads though.Is there something to do with optimization. The sample size to load the charts are high actually

Here my code, i try to draw a chart with candle stick and horizontal line with real time data update, but HorizontalLineAnnotation never show, here my code:
final CategoryDateAxis xAxis = sciChartBuilder.newCategoryDateAxis()
.withGrowBy(0, 0.01)
.withVisibleRange(80, 102)
.build();
NumericAxis yAxis = sciChartBuilder.newNumericAxis()
.withAxisId(PRICES)
.withTextFormatting(“0.00”)
.withAutoRangeMode(AutoRange.Always)
.build();

    Collections.addAll(surface.getXAxes(), xAxis);
    Collections.addAll(surface.getYAxes(), yAxis);

               FastCandlestickRenderableSeries rSeries =  sciChartBuilder.newCandlestickSeries().withDataSeries(stockPrices).withYAxisId(PRICES)
                       .build();

                HorizontalLineAnnotation horizontalLine = sciChartBuilder.newHorizontalLineAnnotation()
                        .withPosition(5d, 3.2d) // i have try to change this but wont work
                        .withStroke(2, ColorUtil.Orange)
                        .withHorizontalGravity(Gravity.RIGHT)
                        .withIsEditable(true)
                        .build();
    ohlcAxisMarker = sciChartBuilder.newAxisMarkerAnnotation().withY1(1d).withBackgroundColor(0xFF33DD33).withYAxisId(PRICES).build();

                UpdateSuspender.using(surface, new Runnable() {
                    @Override
                    public void run() {
                        Collections.addAll(surface.getAnnotations(), ohlcAxisMarker, horizontalLine);
                        Collections.addAll(surface.getRenderableSeries(), rSeries);
                        Collections.addAll(surface.getChartModifiers(), sciChartBuilder.newModifierGroupWithDefaultModifiers().build());
                    }
                });

Hello, I was using version 4.2 before but I updated to version 4.4 last week. I am using candlestick chart in my project and show the chart in various time frames. These time periods include 1 day, 1 hour, 15 minutes, 1 minute and so on. Before the update to v4.4, when 1 time zone was selected, the example would show 09:00, 10:00, and on the 5 minute graph it would show as 09:00, 09:05, 09:10. After updating, it shows 09:00 instead of 09:05 when 5 minutes is selected, and 09:00 instead of 09:19 when 1 minute is selected. I want the date data that I added to the chart to be displayed as it is. I am also attaching screenshots for better understanding.
How can I fix this error I got? There is no problem with the data I have shown in the chart, it sounds as I want, but when I transfer it to the chart, it does not show as I want.

If you change the logarithmic Y axis to a regular NumericalAxis, the mountain series displays properly (with fill color).

I see that this can be done on WPF (using ShowLicensingWarnings), but couldn’t find the property on Android. How can the licensing warning be hidden on Android?

How to position the legend in the botton of chart and make 2 column foreach tag?

I want to remove the place occupied by the axis when the axis is invisible. currently when the axis is invisible it hides the axis, but the place occupied by the axis remains there. It should work as android visibility set to Gone.

Hi,

In Android MVVM architecture, I am trying to @Inject ISuspendable through ViewModelModule, as I cannot pass this to my VMModel constructor.

@Module
abstract class ViewModelModule {

    @Singleton
    @Binds
    abstract fun getSuspendable(aSuspendable: ACMSuspendableImpl): ISuspendable

@Binds
    @IntoMap
    @ViewModelKey(MonitorViewModel::class)
    abstract fun bindsMonitorViewModell(monitorViewModel: MonitorViewModel): ViewModel
}


@Singleton
class ACMSuspendableImpl @Inject constructor() : ISuspendable {


    override fun decrementSuspend() {
    }

    override fun suspendUpdates(): IUpdateSuspender {
        TODO("not implemented")
    }

    override fun getIsSuspended(): Boolean {
        TODO("not implemented")
    }

    override fun resumeUpdates(p0: IUpdateSuspender?) {
    }
}

whereas my MonitorViewModel class as,

class MonitorViewModel @Inject constructor(context: Context) : BaseViewModel()  {

    @Inject
    lateinit var acmSuspend: ISuspendable


private fun loadMonitorData() {

        UpdateSuspender.using(acmSuspend) { //<! NULL ->
            iapDataSeries.append(Timestamp.valueOf(mData100Hz.getRtcTimeStamp().toString()), mData100Hz.emr.iap)
            uoColumnDataSeries.append(
                Timestamp.valueOf(mData100Hz.getRtcTimeStamp().toString()),
                mData100Hz.emr.totalVolume
            )
      }
}

How should I @Inject ISuspendable so that it should not be NULL. Please provide me some example snipped to work.
FYI,

I tried to follow the ECGViewModel but this sample used some custom solution and there is no use of DI.

BR,

Praween

I have a screen with multiple chart surfaces stacked on top of each other within a ScrollView. I can’t use a single chart surface because each of the charts is combined with other types of views to display extra information about the data in the charts.

I have a few issues I’m trying to solve:

1. Each of the charts uses the same x-axis range. When a user pinches to zoom or drags to pan on a chart, I want all the charts to be synchronized to zoom and pan at the same time. How can I do this?

2. Because the charts are embedded in a ScrollView, when I use the following modifiers it is very difficult to smoothly zoom and pan without the ScrollView being activated to scroll up and down. How can I make it so that the ScrollView is deactivated from moving while the user is attempting to zoom or pan a chart

surface.chartModifiers.add(
XAxisDragModifier().apply {
dragMode = AxisDragModifierBase.AxisDragMode.Pan
minTouchArea = 1000.0f
}
)
surface.chartModifiers.add(
PinchZoomModifier().apply {
direction = Direction2D.XDirection
}
)

I’ve attached example code where setting “majorTickLineLength” appears to have no effect on the length of the major tick lines. I’m trying to make them shorter than the default (half the length). How can I adjust the length of these tick lines?

Hi,

I am trying the candlestick chart and I want only 1 bar of space at the end of the chart. For this reason, I limit the chart with the xAxis.setVisibleRangeLimit(0, dataSize + 1) method. By adding +1 to the data size, I get the space at the end of the chart. However, when the chart ends, if I continue to swipe left chart is stretching. I want it to stop when chart comes to end, not stretching. I tried the ZoomPanModifier.setClipModeX (ClipMode.ClipAtExtents) method, but this causes the space at the end of the chart to disappear. How do I prevent the chart from stretching by preserving the trailing gap?

Tnx.

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

I am trying to make a custom Label Provider by extending NumericLabelProvider as it is described here:
https://www.scichart.com/documentation/android/current/webframe.html#Axis%20Labels%20-%20LabelProvider%20API.html

private class PercentLabelProvider : NumericLabelProvider
{
    public override string FormatLabel(Java.Lang.IComparable dataValue)
    {
        return string.Format("{0:P0}", dataValue);
    }
}

However, this is not possible, because FormatLabel can not be overridden.
This is the error message:
“cannot override inherited member ‘FormatterLabelProviderBase.FormatLabel(IComparable)’ because it is not marked virtual, abstract, or override”

DateLabelProvider has the same problem.

I need need to use both.

Is there a solution for this issue?

Hello,

I am wanting to “force” an axis label on a specific value. For example, right now in my datetime graph it always shows a “5PM” time on the axis regardless of the data. Instead, I would like to “anchor” the axis ticks on a different time value, like local Noon. We were able to do this in our previous charting solution, but I have not yet figured out how to do it with SciChart.

Thank you.

Hello, I hope you can help me! please
How could you reach this special design with androidchar.
it’s possible?
Please I need to know if it is feasible, with this I could start to carry out my project.
Thanks in advance.

In Scichart Android version 4.2.0.4557, ICategoryLabelProvider.transformDataToIndex(Date var1); accept date as parameter

but at version 4.2.0.4608, int transformDataToIndex(double var1); it accept double?

then how to convert date to double?

and another question.

1. how set start tick axis in category date axis?
   what i see here first tick of x axis always come with data, not like date axis which data can adapt their position itself.

2. how to set time frame in date axis like category date axis?

3. without scichart builder i cannot set time frame in categorydateaxis

Hi,

Can you please tell me how to change selection points of annotation?

Thanks in advance.

Regards,
Batyr

Hi,
=>Scenario
i am using one LineSeries, two ScatterSeries and one ErrorBarsSeries in my Graph.

=> ISSUE
I want to disable whole Rollover Modifier or labels of Rollover Modifier for only ErrorBarsSeries , How can I do that?

Hi, I am trying to a similar result as provided in the Showcase project (ECG Screen).

However I have been struggling for more than two days with the problem of backline. It draws a line back to start.

Here are some screenshots.

How can I get read of back line.

Thanks

I use the surface.exportToBitmap () to get the picture, but the AxisMarker doesn’t match the actual display, and there’s no sharp arrow. How to solve?

I am developing an application which can receive the data from an ECG circuit, then transmit that data through Bluetooth into my phone application. My phone application would then display the ECG graph. I tried downloading the ECG demo example and it works find on its own. I am trying to incorporate that into my own project and see if it works. However I have been getting errors. Please help me out! Thank you!

I have this strict mode configuration:

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
            .detectDiskReads()
            .detectDiskWrites()
            .detectNetwork()
            .penaltyLog()
            .build());

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
            .detectLeakedSqlLiteObjects()
            .detectLeakedClosableObjects()
            .penaltyLog()
            .penaltyDeath()
            .build());

I have an error when I rotate screen:

 03-15 09:40:24.215 29914-29923 E/StrictMode: A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
   java.lang.Throwable: Explicit termination method 'release' not called
       at dalvik.system.CloseGuard.open(CloseGuard.java:223)
       at android.view.Surface.setNativeObjectLocked(Surface.java:554)
       at android.view.Surface.<init>(Surface.java:187)
       at com.scichart.drawing.opengl.ac.<init>(SourceFile:69)
       at com.scichart.drawing.opengl.n.createCanvasTexture(SourceFile:140)
       at com.scichart.charting.visuals.axes.AxisTickLabelsRendererComponent.onDraw(SourceFile:120)
       at com.scichart.charting.visuals.axes.AxisTickLabelsRendererComponent$HorizontalAxisTickLabelsRendererComponent.onDraw(SourceFile:278)
       at com.scichart.charting.visuals.axes.f.onDraw(SourceFile:182)
       at com.scichart.charting.visuals.axes.AxisBase.onDraw(SourceFile:866)
       at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.a(SourceFile:491)
       at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.g(SourceFile:485)
       at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.a(SourceFile:359)
       at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.a(SourceFile:134)
       at com.scichart.charting.visuals.rendering.RenderSurfaceRenderer.onDraw(SourceFile:123)
       at com.scichart.drawing.opengl.RenderSurfaceGL$a.onDraw(SourceFile:228)
       at com.scichart.drawing.opengl.MyGLRenderer.b(SourceFile:299)
       at com.scichart.drawing.opengl.MyGLRenderer.onDrawFrame(SourceFile:283)
       at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1571)
       at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1270)

Hello to everyone.

Is it possible to draw the 2d heatmap chart output that appears in pixel shape smoothly? Is there any way to solve this with the current library?

I am using stepped yaxis graph – ECG example from your demo set. How do i control the speed of the live graph.
I want to makethe live graph a bit slow. Is there any setting or configuration to be modified to slow the graph. please let us know

Regards,
Aditya