UnsupportedOperationException异常的GLES20Canvas.clipPath硬件加速禁用视图 [英] UnsupportedOperationException in GLES20Canvas.clipPath with hardware acceleration disabled on view

问题描述

我在我的应用程序启用硬件加速，但我已经禁用它，因为我有问题，中风帽和其他的东西我的意见之一。

I have hardware acceleration enabled in my app but I have disabled it for one of my views because I had problems with stroke caps and other things.

现在我收到了谷歌播放崩溃错误控制台该堆栈跟踪：

Now I'm getting this stack trace in the Google Play Crash Errors 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)
...

我指定了安卓hardwareAccelerated =真正的在AndroidManifest.xml中。但是，我专门禁用硬件加速在我的自定义视图的构造器：

I have specified android:hardwareAccelerated="true" in AndroidManifest.xml. But I specifically disabled hardware acceleration in the constructor of my custom 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);
    }

通过兼容性是这样的：

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) {
                }
        }
}

不幸的是，崩溃的错误控制台没有透露有关Android操作系统版本或设备的信息。

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

任何想法可能什么呢？

推荐答案

有一个已知问题，其中一个观点是仍然使用，即使LAYER_TYPE_SOFTWARE设置硬件加速绘制。详情这里

There is a know issue where a view is still drawn using hardware acceleration even if LAYER_TYPE_SOFTWARE was set. Details are here

作为一种解决办法，你可以做两件事

As a workaround you can do two things

1. 使用<一个href="http://developer.android.com/reference/android/graphics/Canvas.html#isHardwareAccelerated%28%29">Canvas.isHardwareAccelerated()跳过问题code。
2. 在画有问题的东西，成位图，并与canvas.drawBitmap（）得出这样到硬件加速的观点。

1. use Canvas.isHardwareAccelerated() to skip the problematic code.
2. draw the problematic stuff into a bitmap and and draw this with canvas.drawBitmap() onto the hardware accelerated view.

这篇关于UnsupportedOperationException异常的GLES20Canvas.clipPath硬件加速禁用视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！