UnsupportedOperationException in clipPath

Question

I get an UnsupportedOperationException when using Canvas clipPath.

This happens on HTC Sensation XE (4.0.3). It works great on other 4.0.3 devices.

This is the code:

@Override protected void dispatchDraw(Canvas canvas) { canvas.save(); canvas.clipPath(this._mClip); super.dispatchDraw(canvas); canvas.restore(); } 

It does not work in "clipPath" with the following stack:

 11-06 12:05:53.650: E/AndroidRuntime(25021): FATAL EXCEPTION: main 11-06 12:05:53.650: E/AndroidRuntime(25021): java.lang.UnsupportedOperationException 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.GLES20Canvas.clipPath(GLES20Canvas.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at com.applicat.meuchedet.views.RoundedListView.dispatchDraw(RoundedListView.java:76) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.draw(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.widget.AbsListView.draw(AbsListView.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.widget.ListView.draw(ListView.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.draw(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.draw(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.widget.FrameLayout.draw(FrameLayout.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewRootImpl.draw(ViewRootImpl.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.os.Handler.dispatchMessage(Handler.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.os.Looper.loop(Looper.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at android.app.ActivityThread.main(ActivityThread.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at java.lang.reflect.Method.invokeNative(Native Method) 11-06 12:05:53.650: E/AndroidRuntime(25021): at java.lang.reflect.Method.invoke(Method.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java) 11-06 12:05:53.650: E/AndroidRuntime(25021): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

There is an answer here. In short: it is no longer supported, but you can still use it if you disable hardware acceleration. See Message for more information.

Answer 2

you can control hardware accelerations for individual actions by editing the manifest file as

 <application android:hardwareAccelerated="true"> <activity ... /> <activity android:hardwareAccelerated="false" /> 

Answer 3

Even I got the same error, here is the answer that helped me launch the Android UnsupportedOperationException Android app on Canvas.clipPath

Answer 4

I ran into the same UnsupportedOperationException problem - when I got a view that tried to use Canvas clipPath (), it would crash only on devices running 4.0.3. You can see how I solved it here .

Answer 5

Since newer versions of Android support hardware accelerated clipPath() , this is probably the best solution:

 try { canvas.clipPath(path); } catch (UnsupportedOperationException exception) { setLayerType(View.LAYER_TYPE_SOFTWARE, null); try { canvas.clipPath(path); } catch (UnsupportedOperationException exception2) { // shouldn't happen, but just in case } }