Pie slice is NOT showing properly

[zarub2k]

I am rendering a Pie chart with proper data into my Android application. The initial view of Pie is NOT showing few slices. But when I click on the slice it is shown properly.

Before click:

After click:

[zarub2k]

Now I have identified when the value is 1 then the slice is NOT rendering. But it is being shown when we click on the slice.

And again if the value for the slice is increased to more than 1 then everything is working fine. Any fix?

[MitjaHenner]

Having the same problem.

[ginnyhuang]

Having same problem, too.
The value is also 1 (I think) that cannot show the area.
The screemshot: http://imgur.com/a/p1Iey

[mtrakal]

Tested on:
Nexus 5x, Android 7: https://youtu.be/n9TLeJID_1M
Sony Xperia Z3 Compact, Android 6
Umi X2 Android 4.2.1.

Tested on latest demo app: v3.0.0, we use 2.2.5 in our app with same issues.

Sometimes missing values in CombinedChart too (maybe not relevant)

Duplicates:
#2424
#2394
#2393
#2385

@PhilJay @danielgindi could you schedule this issue? It's reproducible by demo app for small number of pieces.

[dphillipsprosper]

Also having the issue. Any value <= 1 will not draw a slice, but will draw when highlighted. I think I found the issue and have submitted the PR below to hopefully fix it.

[zarub2k]

How to get this fix in my app? I am currently using com.github.PhilJay:MPAndroidChart:v3.0.0 version. Will that fix be part of this? Or how to get rid of this problem? Anyone help me on this?

[dphillipsprosper]

If you don't want to wait for it to get merged and released, you can pull my fork of the repo in the PR above, and build the branch that I'm trying to get merged into the master branch of this repo. Then follow the top answer in this SO article on how to include it in the build, and comment out the compile 'com.github.PhilJay:MPAndroidChart:v3.0.0' line in your build.gradle you're using now.

Eventually, if my fix gets merged in and a new release of the library happens, you can revert back to your commented out build.gradle line, and update the version.

[danielgindi]

I don't think that (#2467) will fix it. An EPSILON is "pretty much" a zero in computer science, and there's a reason it's there. It's for cases that users have encountered where a number got down to zero but because of rounding issues it actually got to an EPSILON.

And a value of "1" is surely greater than EPSILON...

There's an issue there and I'll investigate.

[mtrakal]

@danielgindi

https://github.com/PhilJay/MPAndroidChart/blob/master/MPChartLib/src/main/java/com/github/mikephil/charting/utils/Utils.java#L46

Constant FLOAT_EPSILON returns 1.0000001 so, value 0 will fix this issue I think :)

[danielgindi]

Oh god. The epsilon is incorrectly calculated. Yes, that would do it. Dammit.

[dphillipsprosper]

Pulled latest and rebuilt. Confirmed the epsilon fix solved the problem.