time series as input to x-Axis data

[naveen kumar]

i downloaded with chartdroid demo
but how to deal with date and time as input for x-Axis data.
can anyone help..?

thanks

[Avinash M]

Convert your date and time to Milliseconds and feed to graph.
But on the graph only date will be displayed.

You can use DateFormat available in Java.
Here is the snippet of the code.

public static long StringToDate(String str_date) {
long lDate = 0;
try {
DateFormat formatter ;
Date date_obj ;
formatter = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
date_obj = (Date)formatter.parse(str_date);
Calendar cal=Calendar.getInstance();
cal.setTime(date_obj);
lDate = cal.getTimeInMillis();
} catch (ParseException e) {
System.out.println("Exception :"+e);
}
return lDate;
}

Feed this lDate as input for x-axis to DataContentProvider.
Hope this solves your issue.

[naveen kumar]

its working, But in graph on x-Axis it not displaying date format ,its displaying in 1.29728E12 (format) in milliseconds i think

how to solve this?

 

[Avinash M]

Check in your ContentProvider whether the data you are sending for x-
axis is of type long.
You need to send your x-axis data in Long format.

And yes, dont forget to change your getType() in ContentProvider to
return ColumnSchema.EventData.CONTENT_TYPE_PLOT_DATA
instead of ColumnSchema.PlotData.CONTENT_TYPE_PLOT_DATA.

This should work.

[naveen kumar]

i am sending X-Axis data in Long Format only...

i change  getType() in ContentProvider to
return ColumnSchema.EventData.CONTENT_TYPE_PLOT_DATA

then its showing "there is no series!"

 

if i change getType() in ContentProvider to

return ColumnSchema.PlotData.CONTENT_TYPE_PLOT_DATA

it shows graph but it displays the x-Axis in 1.29728E12 (format)

[Karl Ostmo]

Here is are two examples of how the Content Provider should be set up for timeline data:

http://code.google.com/p/chartdroid/source/browse/trunk/client/src/org/achartengine/demo/AceDataContentProvider.java#208

http://code.google.com/p/chartdroid/source/browse/trunk/client/src/org/achartengine/demo/AceDataContentProvider.java#274

And here are how the Intents are used:

http://code.google.com/p/chartdroid/source/browse/trunk/client/src/com/googlecode/chartdroid/demo/SampleDatasetsActivity.java#87

Karl

[Hylke van der Schaaf]

Currently the date format for the x-axis of timeline graphs is fixed to the ambiguous US date format. You can specify the format for the y-axis, and the format for the x-axis of all other chart types, but not for the x-axis of timeline graphs.

Could you either allow the date format to be overridden, use a locale-dependent format, or at least use a non-ambiguous format like ISO 8601?

Hylke