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SciChart Android ships with ~90 Android Chart Examples which you can browse, play with, view the source-code and even export each SciChart Android Chart Example to a stand-alone Android Studio project. All of this is possible with the new and improved SciChart Android Examples Suite, which ships as part of our Android Charts SDK.
The Oscilloscope Demo showcases Sorted and Unsorted Data Series in a real-time, while maintaining smooth interactivity and performance in a medium sized dataset (2,000-4,000 points per series).
Interactivity Options
– Change the chart type from Fourier Series to Lissajous (Unsorted X-Y) with or without Digital Step Line
– Zoom, Pan the chart on pinch or finger drag.
– Scale the X and Y Axes, dragging them with a finger”
The full source code for the Android Oscilloscope Demo example is included below (Scroll down!).
Did you know you can also view the source code from one of the following sources as well?
<?xml version="1.0" encoding="utf-8"?><!--*************************************************************************-->
<!-- SCICHART® Copyright SciChart Ltd. 2011-2016. All rights reserved. -->
<!-- -->
<!-- Web: http://www.scichart.com -->
<!-- Support: support@scichart.com -->
<!-- Sales: sales@scichart.com -->
<!-- -->
<!-- example_single_chart_fragment.xml is part of the SCICHART® Examples. Permission is hereby granted -->
<!-- to modify, create derivative works, distribute and publish any part of this source -->
<!-- code whether for commercial, private or personal use. -->
<!-- -->
<!-- The SCICHART® examples are distributed in the hope that they will be useful, but -->
<!-- without any warranty. It is provided "AS IS" without warranty of any kind, either -->
<!-- expressed or implied. -->
<!--*************************************************************************-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.scichart.charting.visuals.SciChartSurface
android:id="@+id/chart"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2017. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales: sales@scichart.com
//
// OscilloscopeFragment.java is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************
package com.scichart.examples.fragments;
import android.app.Dialog;
import android.content.Context;
import android.view.View;
import android.widget.AdapterView;
import android.widget.CompoundButton;
import android.widget.Spinner;
import com.scichart.charting.model.dataSeries.IXyDataSeries;
import com.scichart.charting.visuals.SciChartSurface;
import com.scichart.charting.visuals.axes.AutoRange;
import com.scichart.charting.visuals.axes.IAxis;
import com.scichart.charting.visuals.renderableSeries.FastLineRenderableSeries;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.core.model.DoubleValues;
import com.scichart.data.model.DoubleRange;
import com.scichart.examples.R;
import com.scichart.examples.components.SpinnerStringAdapter;
import com.scichart.examples.data.DataManager;
import com.scichart.examples.fragments.base.ExampleBaseFragment;
import com.scichart.examples.utils.EnumUtils;
import com.scichart.examples.utils.ItemSelectedListenerBase;
import com.scichart.examples.utils.ViewSettingsUtil;
import com.scichart.examples.utils.widgetgeneration.ImageViewWidget;
import com.scichart.examples.utils.widgetgeneration.Widget;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import butterknife.BindView;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
public class OscilloscopeFragment extends ExampleBaseFragment {
enum DataSourceEnum {
FourierSeries,
Lissajous
}
private DataSourceEnum selectedSource = DataSourceEnum.FourierSeries;
private boolean isDigitalLine = false;
private final static long TIME_INTERVAL = 20;
private final IXyDataSeries<Double, Double> dataSeries1 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withAcceptsUnsortedData().build();
private final IXyDataSeries<Double, Double> dataSeries2 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withAcceptsUnsortedData().build();
private final ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
private ScheduledFuture<?> schedule;
private double phase0 = 0.0;
private double phase1 = 0.0;
private double phaseIncrement = Math.PI * 0.1;
@BindView(R.id.chart)
SciChartSurface surface;
private FastLineRenderableSeries rSeries;
@Override
public List<Widget> getToolbarItems() {
return new ArrayList<Widget>() {
{
add(new ImageViewWidget.Builder().setId(R.drawable.example_toolbar_settings).setListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openSettingsDialog();
}
}).build());
}
};
}
@Override
protected int getLayoutId() {
return R.layout.example_single_chart_fragment;
}
@Override
protected void initExample() {
UpdateSuspender.using(surface, new Runnable() {
@Override
public void run() {
final IAxis xBottomAxis = sciChartBuilder.newNumericAxis()
.withAutoRangeMode(AutoRange.Never)
.withAxisTitle("Time (ms)")
.withVisibleRange(new DoubleRange(2.5, 4.5))
.build();
final IAxis yRightAxis = sciChartBuilder.newNumericAxis()
.withAutoRangeMode(AutoRange.Never)
.withAxisTitle("Voltage (mV)")
.withVisibleRange(new DoubleRange(-12.5, 12.5))
.build();
rSeries = sciChartBuilder.newLineSeries()
.withDataSeries(dataSeries1)
.withXAxisId(xBottomAxis.getAxisId())
.withYAxisId(yRightAxis.getAxisId())
.build();
Collections.addAll(surface.getXAxes(), xBottomAxis);
Collections.addAll(surface.getYAxes(), yRightAxis);
Collections.addAll(surface.getRenderableSeries(), rSeries);
Collections.addAll(surface.getChartModifiers(), sciChartBuilder.newModifierGroupWithDefaultModifiers().build());
}
});
schedule = scheduledExecutorService.scheduleWithFixedDelay(new Runnable() {
@Override
public void run() {
UpdateSuspender.using(surface, appendDataRunnable);
}
}, 0, TIME_INTERVAL, MILLISECONDS);
}
private Runnable appendDataRunnable = new Runnable() {
private boolean isSecondDataSeries = false;
private final DoubleValues xValues = new DoubleValues(), yValues = new DoubleValues();
@Override
public void run() {
if (selectedSource == DataSourceEnum.Lissajous) {
DataManager.getInstance().setLissajousCurve(xValues, yValues, 0.12, phase1, phase0, 2500);
} else {
DataManager.getInstance().setFourierSeries(xValues, yValues, 2.0, phase0, 1000);
}
phase0 += phaseIncrement;
phase1 += phaseIncrement * 0.005;
// TODO - this code prevents blinking of series
if (isSecondDataSeries) {
dataSeries1.clear();
dataSeries1.append(xValues, yValues);
rSeries.setDataSeries(dataSeries1);
} else {
dataSeries2.clear();
dataSeries2.append(xValues, yValues);
rSeries.setDataSeries(dataSeries2);
}
isSecondDataSeries = !isSecondDataSeries;
}
};
@Override
public void onDestroyView() {
super.onDestroyView();
schedule.cancel(true);
}
private void openSettingsDialog() {
final Dialog dialog = ViewSettingsUtil.createSettingsPopup(getActivity(), R.layout.example_oscilloscope_demo_popup_layout);
Context context = dialog.getContext();
final SpinnerStringAdapter dataSourceAdapter = new SpinnerStringAdapter(context, EnumUtils.getEnumValuesArray(DataSourceEnum.class));
final Spinner dataSourceSpinner = (Spinner) dialog.findViewById(R.id.data_source_spinner);
dataSourceSpinner.setAdapter(dataSourceAdapter);
dataSourceSpinner.setSelection(dataSourceAdapter.getPosition(String.valueOf(selectedSource)));
dataSourceSpinner.setOnItemSelectedListener(new ItemSelectedListenerBase() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
selectedSource = DataSourceEnum.valueOf(dataSourceAdapter.getItem(position));
if (selectedSource == DataSourceEnum.FourierSeries) {
surface.getXAxes().get(0).setVisibleRange(new DoubleRange(2.5, 4.5));
surface.getYAxes().get(0).setVisibleRange(new DoubleRange(-12.5, 12.5));
phaseIncrement = Math.PI * 0.1;
} else {
surface.getXAxes().get(0).setVisibleRange(new DoubleRange(-1.2, 1.2));
surface.getYAxes().get(0).setVisibleRange(new DoubleRange(-1.2, 1.2));
phaseIncrement = Math.PI * 0.02;
}
}
});
ViewSettingsUtil.setUpSwitchCompat(dialog, R.id.is_step_line_checkbox, isDigitalLine, new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
isDigitalLine = isChecked;
((FastLineRenderableSeries) surface.getRenderableSeries().get(0)).setIsDigitalLine(isDigitalLine);
}
});
dialog.show();
}
}