Error on android P developer preview

[nowfalsalahudeen]

java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed
at android.graphics.Canvas.checkValidClipOp(Canvas.java:779)
at android.graphics.Canvas.clipRect(Canvas.java:802)
at com.intrusoft.library.FrissonView.onDraw(FrissonView.java:226)
at android.view.View.draw(View.java:20207)
at android.view.View.updateDisplayListIfDirty(View.java:19082)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at androidx.constraintlayout.widget.ConstraintLayout.dispatchDraw(ConstraintLayout.java:2020)
at android.view.View.updateDisplayListIfDirty(View.java:19073)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.draw(View.java:20210)
at androidx.viewpager.widget.ViewPager.draw(ViewPager.java:2426)
at android.view.View.updateDisplayListIfDirty(View.java:19082)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.updateDisplayListIfDirty(View.java:19073)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.updateDisplayListIfDirty(View.java:19073)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.updateDisplayListIfDirty(View.java:19073)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.updateDisplayListIfDirty(View.java:19073)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.updateDisplayListIfDirty(View.java:19073)
at android.view.View.draw(View.java:19935)
at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
at android.view.View.draw(View.java:20210)
at com.android.internal.policy.DecorView.draw(DecorView.java:780)
at android.view.View.updateDisplayListIfDirty(View.java:19082)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:686)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:692)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:801)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:3312)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3116)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2485)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1460)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7184)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
at android.view.Choreographer.doCallbacks(Choreographer.java:761)
at android.view.Choreographer.doFrame(Choreographer.java:696)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

[AlexandruDev]

I have the same issue. From the official documentation:

As of API Level API level Build.VERSION_CODES.P only INTERSECT and DIFFERENCE are valid Region.Op parameters.

The issue is in FrissonView.java at line 226: canvas.clipRect(viewBounds, Region.Op.UNION);
As you can see the region is set to UNION which is removed since Android 9.0 P.

What I did is I added an if statement inside FrissonView.java, to check which Android version the phone is running and set the Region.Op according to it.

if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
   canvas.clipRect(viewBounds, Region.Op.UNION)
} else {
   canvas.clipRect(viewBounds)
}

The app doesn't crash anymore on 9.0 devices but the waves from the view are a bit messed up, so this is not a perfect solution, more like a temporary fix.

[2quarius]

+1

[Gamis214]

I have the same problem... i hope this issue can fix...

E/AndroidRuntime: FATAL EXCEPTION: main
Process: xpedition.app, PID: 20441
java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed
at android.graphics.Canvas.checkValidClipOp(Canvas.java:779)
at android.graphics.Canvas.clipRect(Canvas.java:802)
at com.intrusoft.library.FrissonView.onDraw(FrissonView.java:226)

[pradeep2424]

I am facing same issue.
When this issue will be fixed?