Android的BlurMaskFilter在canvas.drawOval没有效果，而文字模糊模糊、效果、文字、BlurMaskFilter
我一直在试图创建一个已根据文字模糊的图形自定义视图。的问题是，BlurMaskFilter对我在画布上绘制任何形状没有影响。下面是我如何初始化构造函数中的油漆对象：
颜料=新的油漆（0）;
paint.setColor（为0xffffffff）;
paint.setMaskFilter（新BlurMaskFilter（8，BlurMaskFilter.Blur.NORMAL））;
mShadowPaint =新的油漆（0）;
mShadowPaint.setColor（0xff333333）;
mShadowPaint.setMaskFilter（新BlurMaskFilter（10，BlurMaskFilter.Blur.NORMAL））;
和我打电话像这样的的OnDraw（）函数：
canvas.drawOval（mShadowBounds，mShadowPaint）;
canvas.drawText（你好，X，Y，油漆）;
但是，这是我所看到的。
一4.0.4 Galaxy Nexus的设备（英国）上采用了Android 4.0 SDK和测试。我不知道如果这是在4.0.4中的错误，因为我没有在模拟器上与4.0和4.0.3进行测试，它也模糊得很清楚他们，除非我做一些完全错误的？
编辑：这里是扩展查看code到其他平台上测试它
进口android.content.Context;
进口android.graphics.BlurMaskFilter;
进口android.graphics.Canvas;
进口android.graphics.Paint;
进口android.graphics.RectF;
进口android.util.AttributeSet;
进口android.view.View;
公共类BlurTestView扩展视图{
民营涂料粉刷;
私人油漆mShadowPaint;
私人诠释大小= 100;
私人RectF mShadowBounds =新RectF（）;
公共BlurTestView（上下文的背景下）{
这（背景下，NULL，0）;
}
公共BlurTestView（上下文的背景下，ATTRS的AttributeSet）{
这（背景下，ATTRS，0）;
}
公共BlurTestView（上下文的背景下，ATTRS的AttributeSet，诠释defStyle）{
超（背景下，ATTRS，defStyle）;
油漆=新的油漆（0）;
paint.setColor（0xff333333）;
paint.setTextSize（大小）;
paint.setMaskFilter（新BlurMaskFilter（8，BlurMaskFilter.Blur.NORMAL））;
mShadowPaint =新的油漆（0）;
mShadowPaint.setColor（0xff333333）;
mShadowPaint.setMaskFilter（新BlurMaskFilter（10，BlurMaskFilter.Blur.NORMAL））;
mShadowBounds.top =大小;
mShadowBounds.bottom = mShadowBounds.top +（尺寸/ 2）;
mShadowBounds.left = 0;
mShadowBounds.right =（INT）paint.measureText（你好）;
}
@覆盖
公共无效的OnDraw（帆布油画）
{
canvas.drawOval（mShadowBounds，mShadowPaint）;
canvas.drawText（你好，0，大小，油漆）;
}
}
解决方案
看起来像我的错误。我报给Android团队;我们将看到他们在说什么。
hardwareAccelerated =假您在的AndroidManifest.xml 活动：如果您设置安卓它使得正确。
下面是从Android图形球队官方消息： BlurMaskFilter不支持硬件加速。 （截至2012年7月10号的）
I've been trying to create a custom view which has blurred shapes under text. The problem is that the BlurMaskFilter has no effect on any shape that I draw on the canvas. Here is how I'm initialising the Paint objects in the constructor:
paint = new Paint(0);
paint.setColor(0xffffffff);
paint.setMaskFilter(new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL));
mShadowPaint = new Paint(0);
mShadowPaint.setColor(0xff333333);
mShadowPaint.setMaskFilter(new BlurMaskFilter(10, BlurMaskFilter.Blur.NORMAL));
And I'm calling the functions like this in onDraw():
canvas.drawOval(mShadowBounds,mShadowPaint);
canvas.drawText("hello", x, y, paint);
But this is what I see.
Using android 4.0 sdk and testing on a 4.0.4 galaxy nexus device (UK). I'm wondering if this is a bug in 4.0.4 as I did test it on the emulator with 4.0 and 4.0.3 and it did blur perfectly well on them, unless I'm doing something completely wrong?
EDIT: Here is the extended View code to test it on other platforms.
import android.content.Context;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
public class BlurTestView extends View{
private Paint paint;
private Paint mShadowPaint;
private int size = 100;
private RectF mShadowBounds = new RectF();
public BlurTestView(Context context) {
this(context, null, 0);
}
public BlurTestView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public BlurTestView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
paint = new Paint(0);
paint.setColor(0xff333333);
paint.setTextSize(size);
paint.setMaskFilter(new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL));
mShadowPaint = new Paint(0);
mShadowPaint.setColor(0xff333333);
mShadowPaint.setMaskFilter(new BlurMaskFilter(10, BlurMaskFilter.Blur.NORMAL));
mShadowBounds.top = size;
mShadowBounds.bottom = mShadowBounds.top+(size /2);
mShadowBounds.left = 0;
mShadowBounds.right = (int)paint.measureText("hello");
}
@Override
public void onDraw(Canvas canvas)
{
canvas.drawOval(mShadowBounds,mShadowPaint);
canvas.drawText("hello", 0, size, paint);
}
}
解决方案
Looks like a bug to me. I reported it to the Android team; we'll see what they say.
It renders correctly if you set android:hardwareAccelerated="false" on your Activity in AndroidManifest.xml.
Here is the official word from the Android graphics team: "BlurMaskFilter is not supported with hardware acceleration." (As of July 10, 2012)
