UnsupportedOperationException in GLES20Canvas.clipPath with hardware acceleration disabled

Question

I have hardware acceleration enabled in my application, but I turned it off for one of my views because I had problems with hoods and other things.

Now I get this stack trace in the Google Play Crash error console:

java.lang.UnsupportedOperationException at android.view.GLES20Canvas.clipPath(GLES20Canvas.java:287) at com.myapp.MyCustomView.onDraw(SourceFile:288) at android.view.View.draw(View.java:9310) at android.view.View.getDisplayList(View.java:8773) at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2298) ... at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:609) at android.view.ViewRoot.draw(ViewRoot.java:1634) at android.view.ViewRoot.performTraversals(ViewRoot.java:1450) at android.view.ViewRoot.handleMessage(ViewRoot.java:2094) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:132) at android.app.ActivityThread.main(ActivityThread.java:4123) ... 

I specified android:hardwareAccelerated="true" in AndroidManifest.xml. But I specifically turned off hardware acceleration in the constructor of my user view:

  public MyCustomView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // ... code omitted // disable acceleration because Paint.setStrokeCap(Cap.ROUND) is not working otherwise Compatibility.disableHardwareAcceleration(this); } 

Compatibility is:

 public class Compatibility { // View.setLayerType() was introduced in Honeycomb private static Method setLayerTypeMethod = getMethod(View.class, "setLayerType", int.class, Paint.class); private static Method getMethod(Class<?> clazz, String name, Class<?>... parameterTypes) { try { return clazz.getMethod(name, parameterTypes); } catch (NoSuchMethodException e) { return null; } } private Compatibility() { } public static void disableHardwareAcceleration(View view) { try { if (setLayerTypeMethod != null) { int layerType = 1; // View.LAYER_TYPE_SOFTWARE setLayerTypeMethod.invoke(view, layerType, null); } } catch (Exception ignored) { } } } 

Unfortunately, the Crash Errors console does not reveal information about the Android OS version or device.

Any ideas what could happen?

Answer 1

There is a problem with the information when the view is still running using hardware acceleration, even if LAYER_TYPE_SOFTWARE is set. Details here

As a workaround, you can do two things

• use Canvas.isHardwareAccelerated () to skip the problematic code.
• draw the problematic material into a bitmap and draw it using canvas.drawBitmap () on a hardware accelerated view.