android 5.0.X上实用SVG,其中包含科学计数法时出现crash
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很坑的问题,但是很大,在所有Android5.0设备上,app直接crash。google baidu 都没用,无果,一点一点的排查。最终找到原因。因为项目中使用了很多SVG,SVG都是使用工具生成出来的,所以避免不了默写SVG包含科学计数法。
问题来了,SVG中的科学计数法是啥样?
直接搜‘e-’像这样
如果包含这种,你运行在Android5.0的设备上,应该直接crash,具体如下
04-10 09:33:25.713 19306-19306/com.robin.myapplication E/AndroidRuntime: FATAL EXCEPTION: main Process: com.robin.myapplication, PID: 19306 java.lang.ArrayIndexOutOfBoundsException: length=1; index=1 at android.util.PathParser$PathDataNode.addCommand(PathParser.java:335) at android.util.PathParser$PathDataNode.nodesToPath(PathParser.java:260) at android.graphics.drawable.VectorDrawable$VPath.toPath(VectorDrawable.java:1265) at android.graphics.drawable.VectorDrawable$VPathRenderer.drawPath(VectorDrawable.java:950) at android.graphics.drawable.VectorDrawable$VPathRenderer.drawGroupTree(VectorDrawable.java:931) at android.graphics.drawable.VectorDrawable$VPathRenderer.draw(VectorDrawable.java:938) at android.graphics.drawable.VectorDrawable$VectorDrawableState.updateCachedBitmap(VectorDrawable.java:705) at android.graphics.drawable.VectorDrawable.draw(VectorDrawable.java:280) at android.view.View.getDrawableRenderNode(View.java:15396) at android.view.View.drawBackground(View.java:15347) at android.view.View.draw(View.java:15113) at android.view.View.updateDisplayListIfDirty(View.java:14056) at android.view.View.getDisplayList(View.java:14079) at android.view.View.draw(View.java:14846) at android.view.ViewGroup.drawChild(ViewGroup.java:3404) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14051) at android.view.View.getDisplayList(View.java:14079) at android.view.View.draw(View.java:14846) at android.view.ViewGroup.drawChild(ViewGroup.java:3404) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14051) at android.view.View.getDisplayList(View.java:14079) at android.view.View.draw(View.java:14846) at android.view.ViewGroup.drawChild(ViewGroup.java:3404) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14051) at android.view.View.getDisplayList(View.java:14079) at android.view.View.draw(View.java:14846) at android.view.ViewGroup.drawChild(ViewGroup.java:3404) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14051) at android.view.View.getDisplayList(View.java:14079) at android.view.View.draw(View.java:14846) at android.view.ViewGroup.drawChild(ViewGroup.java:3404) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14051) at android.view.View.getDisplayList(View.java:14079) at android.view.View.draw(View.java:14846) at android.view.ViewGroup.drawChild(ViewGroup.java:3404) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.draw(View.java:15125) at android.widget.FrameLayout.draw(FrameLayout.java:592) at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2595) at android.view.View.updateDisplayListIfDirty(View.java:14056) at android.view.View.getDisplayList(View.java:14079) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:266) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:272) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:311) at android.view.ViewRootImpl.draw(ViewRootImpl.java:2492) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2337) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1968) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5264) at
截图如下:
关于解决方案:要是工具(PhotoShop)转出来的带有科学计数法,比如2.567e-10,那么我们就要转化成小数格式。(学前班的数学老师告诉过我,要把科学计数法转换成小数,小数点向前移动一位,不足补零)所以,
2.567e-10=0.0000000002567,大家可以看一下效果,跟科学计数法相同,说明可以代替科学计数法。
附赠一个web端的转SVG网站
http://inloop.github.io/svg2android/
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