StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POAndroid UnsupportedOperationException at Canvas.clipPath
text
Body
copied!<p>I am using the image crop library from here <a href="https://github.com/lvillani/android-cropimage" rel="noreferrer">https://github.com/lvillani/android-cropimage</a> in my project to crop images stored on device. </p> <p>However, certain users are reporting crashes with the following stack trace</p> <pre><code>java.lang.UnsupportedOperationException at android.view.GLES20Canvas.clipPath(GLES20Canvas.java:413) at com.android.camera.HighlightView.draw(HighlightView.java:101) at com.android.camera.CropImageView.onDraw(CropImage.java:783) at android.view.View.draw(View.java:11006) at android.view.View.getDisplayList(View.java:10445) at android.view.ViewGroup.drawChild(ViewGroup.java:2850) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) at android.view.View.getDisplayList(View.java:10443) at android.view.ViewGroup.drawChild(ViewGroup.java:2850) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) at android.view.View.getDisplayList(View.java:10443) at android.view.ViewGroup.drawChild(ViewGroup.java:2850) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) at android.view.View.getDisplayList(View.java:10443) at android.view.ViewGroup.drawChild(ViewGroup.java:2850) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) at android.view.View.getDisplayList(View.java:10443) at android.view.ViewGroup.drawChild(ViewGroup.java:2850) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2489) at android.view.View.draw(View.java:11009) at android.widget.FrameLayout.draw(FrameLayout.java:450) at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2154) at android.view.View.getDisplayList(View.java:10445) at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:853) at android.view.ViewRootImpl.draw(ViewRootImpl.java:1961) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1679) at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2558) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4697) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554) at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>From searching I think it is caused by hardware acceleration on only certain devices. I have disable hardware acceleration in my manifest but the exception is still occurring. I have also found "A solid workaround is to identify the problematic operations in your code, draw those to a bitmap instead, then blit the bitmap to your accelerated canvas."</p> <p>The problematic code according to the stack trace is</p> <pre><code>protected void draw(Canvas canvas) { if (mHidden) { return; } canvas.save(); Path path = new Path(); if (!hasFocus()) { mOutlinePaint.setColor(0xFF000000); canvas.drawRect(mDrawRect, mOutlinePaint); } else { Rect viewDrawingRect = new Rect(); mContext.getDrawingRect(viewDrawingRect); if (mCircle) { float width = mDrawRect.width(); float height = mDrawRect.height(); path.addCircle(mDrawRect.left + (width / 2), mDrawRect.top + (height / 2), width / 2, Path.Direction.CW); mOutlinePaint.setColor(0xFFEF04D6); } else { path.addRect(new RectF(mDrawRect), Path.Direction.CW); mOutlinePaint.setColor(0xFFFF8A00); } canvas.clipPath(path, Region.Op.DIFFERENCE); canvas.drawRect(viewDrawingRect, hasFocus() ? mFocusPaint : mNoFocusPaint); canvas.restore(); canvas.drawPath(path, mOutlinePaint); if (mMode == ModifyMode.Grow) { if (mCircle) { int width = mResizeDrawableDiagonal.getIntrinsicWidth(); int height = mResizeDrawableDiagonal.getIntrinsicHeight(); int d = (int) Math.round(Math.cos(/*45deg*/Math.PI / 4D) * (mDrawRect.width() / 2D)); int x = mDrawRect.left + (mDrawRect.width() / 2) + d - width / 2; int y = mDrawRect.top + (mDrawRect.height() / 2) - d - height / 2; mResizeDrawableDiagonal.setBounds(x, y, x + mResizeDrawableDiagonal.getIntrinsicWidth(), y + mResizeDrawableDiagonal.getIntrinsicHeight()); mResizeDrawableDiagonal.draw(canvas); } else { int left = mDrawRect.left + 1; int right = mDrawRect.right + 1; int top = mDrawRect.top + 4; int bottom = mDrawRect.bottom + 3; int widthWidth = mResizeDrawableWidth.getIntrinsicWidth() / 2; int widthHeight = mResizeDrawableWidth.getIntrinsicHeight() / 2; int heightHeight = mResizeDrawableHeight.getIntrinsicHeight() / 2; int heightWidth = mResizeDrawableHeight.getIntrinsicWidth() / 2; int xMiddle = mDrawRect.left + ((mDrawRect.right - mDrawRect.left) / 2); int yMiddle = mDrawRect.top + ((mDrawRect.bottom - mDrawRect.top) / 2); mResizeDrawableWidth.setBounds(left - widthWidth, yMiddle - widthHeight, left + widthWidth, yMiddle + widthHeight); mResizeDrawableWidth.draw(canvas); mResizeDrawableWidth.setBounds(right - widthWidth, yMiddle - widthHeight, right + widthWidth, yMiddle + widthHeight); mResizeDrawableWidth.draw(canvas); mResizeDrawableHeight.setBounds(xMiddle - heightWidth, top - heightHeight, xMiddle + heightWidth, top + heightHeight); mResizeDrawableHeight.draw(canvas); mResizeDrawableHeight.setBounds(xMiddle - heightWidth, bottom - heightHeight, xMiddle + heightWidth, bottom + heightHeight); mResizeDrawableHeight.draw(canvas); } } } } </code></pre> <p>How can I draw to a bitmap and then blit to the canvas?</p> <p>Any help would be greatly appreciated!</p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload