错误：

java.lang.IllegalArgumentException: Invalid Layer Save Flag - only ALL_SAVE_FLAGS is allowed
        at android.graphics.Canvas.checkValidSaveFlags(Canvas.java:442)
        at android.graphics.Canvas.saveLayer(Canvas.java:519)
        at com.airbnb.lottie.model.layer.BaseLayer.applyMasks(BaseLayer.java:367)
        at com.airbnb.lottie.model.layer.BaseLayer.applyMasks(BaseLayer.java:325)
        at com.airbnb.lottie.model.layer.BaseLayer.draw(BaseLayer.java:218)
        at com.airbnb.lottie.model.layer.CompositionLayer.drawLayer(CompositionLayer.java:100)
        at com.airbnb.lottie.model.layer.BaseLayer.draw(BaseLayer.java:190)
        at com.airbnb.lottie.model.layer.CompositionLayer.drawLayer(CompositionLayer.java:100)
        at com.airbnb.lottie.model.layer.BaseLayer.draw(BaseLayer.java:190)
        at com.airbnb.lottie.LottieDrawable.draw(LottieDrawable.java:312)
        at android.widget.ImageView.onDraw(ImageView.java:1448)
        at android.view.View.draw(View.java:21647)
        at android.view.View.buildDrawingCacheImpl(View.java:20910)
        at android.view.View.buildDrawingCache(View.java:20764)
        at android.view.View.draw(View.java:21366)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.draw(View.java:21650)
        at android.view.View.updateDisplayListIfDirty(View.java:20507)
        at android.view.View.draw(View.java:21374)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.draw(View.java:21650)
        at android.view.View.updateDisplayListIfDirty(View.java:20507)
        at android.view.View.draw(View.java:21374)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.updateDisplayListIfDirty(View.java:20498)
        at android.view.View.draw(View.java:21374)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.updateDisplayListIfDirty(View.java:20498)
        at android.view.View.draw(View.java:21374)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.updateDisplayListIfDirty(View.java:20498)
        at android.view.View.draw(View.java:21374)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.updateDisplayListIfDirty(View.java:20498)
        at android.view.View.draw(View.java:21374)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4595)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4354)
        at android.view.View.draw(View.java:21650)
        at com.android.internal.policy.DecorView.draw(DecorView.java:1003)
        at android.view.View.updateDisplayListIfDirty(View.java:20507)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:584)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:590)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:668)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:3895)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3703)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2992)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1879)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8170)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1057)
        at android.view.Choreographer.doCallbacks(Choreographer.java:875)
        at android.view.Choreographer.doFrame(Choreographer.java:776)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1042)
        at android.os.Handler.handleCallback(Handler.java:900)
        at android.os.Handler.dispatchMessage(Handler.java:103)
        at android.os.Looper.loop(Looper.java:219)
        at android.app.ActivityThread.main(ActivityThread.java:8347)
2020-07-16 15:30:02.080 E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)

错误原因：
lottie版本与android版本不兼容，使用最新的lottie包