IllegalArgumentException：半径必须> 0 [英] IllegalArgumentException: radius must be > 0

问题描述

我正在使用AChartEngine库在视图分页器中设计条形图和饼图。当我从条形图滚动到饼图时，应用程序崩溃。崩溃报告如下。

I'm designing a bar graph and a pie chart in a view pager using AChartEngine library. When I scroll from bar graph to pie chart, application crashes. The crash report is as following.

 FATAL EXCEPTION: main
 java.lang.IllegalArgumentException: radius must be > 0
    at android.graphics.RadialGradient.<init>(RadialGradient.java:58)
    at org.achartengine.chart.PieChart.draw(PieChart.java:112)
    at org.achartengine.GraphicalView.onDraw(GraphicalView.java:168)
    at android.view.View.draw(View.java:11120)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2901)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.View.draw(View.java:11123)
    at android.support.v4.view.ViewPager.draw(ViewPager.java:2157)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2901)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.View.draw(View.java:11123)
    at android.widget.FrameLayout.draw(FrameLayout.java:450)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2901)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.ViewGroup.drawChild(ViewGroup.java:2899)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2503)
    at android.view.View.draw(View.java:11123)
    at android.widget.FrameLayout.draw(FrameLayout.java:450)
    at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2276)
    at android.view.ViewRootImpl.draw(ViewRootImpl.java:2210)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1816)
    at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2628)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4517)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
    at dalvik.system.NativeStart.main(Native Method)

任何解决此问题的帮助将是可观的。

Any help to solve this will be appreciable.

推荐答案

如果您在Android L上遇到此问题（5.0），我注意到GradientDrawable不接受％后缀。因此，我改用了％p后缀，它可以正常工作。另外，我需要将正常值（80％p）的高值（80000％）更改为正常值。

If you are having this issue on Android L (5.0), I have noticed that GradientDrawable does not accept the "%" suffix. So instead, I have used the "%p" suffix, and it works. Also, I needed to change my absurdly high value (80000%) with a normal value (80%p), and now it looks proper.

所以，我创建了一个 drawable-v21文件夹（Android L将从该文件夹中获取其可绘制对象），复制了包含渐变的我的shape xml并更改了以下行：

So, I have created a "drawable-v21" folder (from which Android L will take its drawables), copied my shape xml which contains the gradient and changed this line:

android:gradientRadius="80000%"

与此

android:gradientRadius="80%p"

这篇关于IllegalArgumentException：半径必须> 0的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！