在Android中将图像裁剪为圆形

有谁知道如何将图像\位图裁剪成圆形？我找不到任何解决方案，抱歉..在Android中将图像裁剪为圆形

2012-10-17 AlexMrKlim

@ user1281750阅读问题详细准确！它不重复任何方式！ –

可能的重复[裁剪圆形区域从位图在Android]（http://stackoverflow.com/questions/11932805/cropping-circular-area-from-bitmap-in-android） – Adinia

与下面的代码试试：

public Bitmap getRoundedShape(Bitmap scaleBitmapImage) { 
    // TODO Auto-generated method stub 
    int targetWidth = 50; 
    int targetHeight = 50; 
    Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, 
          targetHeight,Bitmap.Config.ARGB_8888); 

       Canvas canvas = new Canvas(targetBitmap); 
    Path path = new Path(); 
    path.addCircle(((float) targetWidth - 1)/2, 
    ((float) targetHeight - 1)/2, 
    (Math.min(((float) targetWidth), 
       ((float) targetHeight))/2), 
      Path.Direction.CCW); 

       canvas.clipPath(path); 
    Bitmap sourceBitmap = scaleBitmapImage; 
    canvas.drawBitmap(sourceBitmap, 
           new Rect(0, 0, sourceBitmap.getWidth(), 
    sourceBitmap.getHeight()), 
           new Rect(0, 0, targetWidth, 
    targetHeight), null); 
    return targetBitmap; 
}

来源

2014-03-18 05:56:32

不工作。请建议我。 – Arun

类：

public Bitmap getRoundedShape(Bitmap scaleBitmapImage) { 

    int targetWidth = 50; 
    int targetHeight = 50; 
    Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, 
         targetHeight,Bitmap.Config.ARGB_8888); 
         canvas = new Canvas(targetBitmap); 
    Path path = new Path(); 
    path.addCircle(((float) targetWidth - 1)/2, 
    ((float) targetHeight - 1)/2, 
    (Math.min(((float) targetWidth), 
      ((float) targetHeight))/2), 
     Path.Direction.CCW); 

    canvas.clipPath(path); 
    Bitmap sourceBitmap = scaleBitmapImage; 
    canvas.drawBitmap(sourceBitmap, 
          new Rect(0, 0, sourceBitmap.getWidth(), 
     sourceBitmap.getHeight()), 
          new Rect(0, 0, targetWidth, 
     targetHeight), null); 
    return targetBitmap; 
    }

查看：

<ImageView 
     android:id="@+id/imgView" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_above="@+id/btnEdit" 
     android:layout_centerHorizontal="true" 
     android:layout_marginTop="40dp" 
     android:background="@drawable/rounded" 
     android:adjustViewBounds="true" 
     android:gravity="center" 
     android:src="@drawable/happy"/>

其他样式：

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" > 

<solid android:color="@android:color/white" /> 

<stroke 
    android:width="3dip" 
    android:color="#FF0000" /> 

<corners android:radius="10dp" /> 

<padding 
    android:bottom="0dp" 
    android:left="0dp" 
    android:right="0dp" 
    android:top="0dp" />

来源

2014-05-20 12:36:51 MarcinZiolek

Romain Guy，以前是谷歌Android团队的工程师，发表了一篇关于drawing images with rounded corners的优秀文章。这个想法可以很容易地扩展到一个圆，例如，通过改变圆角的矩形半径，以便创建一个完整的圆。

从文章：

要生成圆形图片，我只是写了一个定制Drawable是绘制使用Canvas.drawRoundRect()一个圆角矩形。窍门是使用Paint与BitmapShader填充圆角矩形纹理而不是简单的颜色。下面是代码的样子：
BitmapShader shader; shader = new BitmapShader(bitmap, 
Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); 

Paint paint = new Paint(); paint.setAntiAlias(true); 
paint.setShader(shader); 

RectF rect = new RectF(0.0f, 0.0f, width, height); 

// rect contains the bounds of the shape 
// radius is the radius in pixels of the rounded corners 
// paint contains the shader that will texture the shape 
canvas.drawRoundRect(rect, radius, radius, paint); 

来源

2014-05-20 13:39:14

Canvas也暴露了一个[drawCircle]（http://developer.android.com/reference/android/graphics/Canvas.html）方法，它可能更适合这种情况。 – greg7gkb

finalBitmapShader shader = newBitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); 
mPaint.setShader(shader); 
mBitmapWidth=mBitmap.getWidth(); 
mBitmapHeight=mBitmap.getHeight(); 
} 
@Override 
public void draw(Canvas canvas{ 
    canvas.drawOval(mRectF,mPaint); 
} 
@Override 
protected void onBoundsChange(Rect bounds) { 
    super.onBoundsChange(bounds); 
    mRectF.set(bounds); 
}

在这里我找到了一个示例教程在 http://androidgreeve.blogspot.in/2014/09/facebook-messanger-like-profile-image.html?m=1

来源

2014-09-03 09:33:16 user3929769

怀斯曼设计，有一个开放源码的通知ImageView的准备使用

https://github.com/wisemandesigns/CircularImageView

这将在您的布局中使用XML，它让生活更轻松。你可以用XML来设置源代码，或者稍加修改就可以很容易地使用Bitmap。

声明：我怀斯曼工作设计

来源

2014-09-03 09:41:44

对于有圆角的ImageView的，将您的图像转换成位图，然后尝试下面的代码：

 private Bitmap getRoundedCroppedBitmap(Bitmap bitmap) { 
     int widthLight = bitmap.getWidth(); 
     int heightLight = bitmap.getHeight(); 

     Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),Config.ARGB_8888); 

     Canvas canvas = new Canvas(output); 
     Paint paintColor = new Paint(); 
     paintColor.setFlags(Paint.ANTI_ALIAS_FLAG); 

     RectF rectF = new RectF(new Rect(0, 0, widthLight, heightLight)); 

     canvas.drawRoundRect(rectF, widthLight/2 ,heightLight/2,paintColor); 

     Paint paintImage = new Paint(); 
     paintImage.setXfermode(new PorterDuffXfermode(Mode.SRC_ATOP)); 
     canvas.drawBitmap(bitmap, 0, 0, paintImage); 

     return output; 
    }

来源

2015-02-05 09:57:08

在Android中将图像裁剪为圆形

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