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Removing ChartSeries Options · View
ahsteele
#1 Posted : Wednesday, March 24, 2010 6:34:04 PM
Rank: Newbie

Groups: Registered

Joined: 3/14/2010
Posts: 8
Location: Colorado, US
When I remove a ChartSeries from a ChartView, I am getting a NullPointerException.

I am removing the ChartSeries like this:
chartView.getSeries().remove(1);

Is there another to remove without causing this error? Or is there a way to disable a ChartSeries, so that it is not visible on the chart?

Here is the stack that I am receiving...

03-24 16:19:17.715: ERROR/AndroidRuntime(754): Uncaught handler: thread main exiting due to uncaught exception
03-24 16:19:17.841: ERROR/AndroidRuntime(754): java.lang.NullPointerException
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.artfulbits.aiCharts.Types.ChartLineType.draw(ChartLineType.java:86)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.artfulbits.aiCharts.Base.ChartArea.draw(ChartArea.java:432)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.artfulbits.aiCharts.Base.ChartEngine.draw(ChartEngine.java:469)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.artfulbits.aiCharts.ChartView.onDraw(ChartView.java:514)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.View.draw(View.java:6535)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.drawChild(ViewGroup.java:1531)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.drawChild(ViewGroup.java:1529)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.View.draw(View.java:6538)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.drawChild(ViewGroup.java:1531)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.View.draw(View.java:6538)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.widget.FrameLayout.draw(FrameLayout.java:352)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.drawChild(ViewGroup.java:1531)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.View.draw(View.java:6538)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.widget.FrameLayout.draw(FrameLayout.java:352)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1830)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewRoot.draw(ViewRoot.java:1349)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewRoot.performTraversals(ViewRoot.java:1114)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.os.Handler.dispatchMessage(Handler.java:99)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.os.Looper.loop(Looper.java:123)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at android.app.ActivityThread.main(ActivityThread.java:4363)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at java.lang.reflect.Method.invokeNative(Native Method)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at java.lang.reflect.Method.invoke(Method.java:521)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
03-24 16:19:17.841: ERROR/AndroidRuntime(754): at dalvik.system.NativeStart.main(Native Method)
ahsteele
#2 Posted : Thursday, March 25, 2010 7:12:08 AM
Rank: Newbie

Groups: Registered

Joined: 3/14/2010
Posts: 8
Location: Colorado, US
I implemented a workaround for this by copying all ChartPoints associated with the ChartSeries that I want to disappear over to a list. When the user selects to display the ChartSeries again, I am copying the ChartPoints back over to the ChartSeries ChartPointCollection. This in essence makes a line disappear/reappear from a chart. It's a bit of a hack, but preserves the points and ensures that the ChartSeries will have the same color from the palette as it originally did.

Baydalka Volodymyr
#3 Posted : Thursday, March 25, 2010 6:16:58 PM
Rank: Developers Team


Groups: Registered, Administrators

Joined: 7/28/2009
Posts: 447
Hi,

Thank you for bug report. Try to call ChartArea.refresh() method when you remove series

Best regards,
Volodymyr Baydalka
Andriod development and support team
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