如何使图像适合Android的圆形框架

我有一个ListView其中有ImageView,ImageView图像从服务器获取后动态加载。现在，我想要这些图像，任何大小，适合一个圆形框架，如何做到这一点？这里有一个样品的PIC我想如何使图像适合Android的圆形框架

enter image description here

2012-12-27 Sanghita

试试这个。 http://stackoverflow.com/questions/5882180/how-to-set-bitmap-in-circular-imageview 希望它会帮助你 – 2012-12-27 08:06:08

与以往答案的帮助下，我来到了这个solution.Hope它帮助别人：

import android.app.Activity; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Paint; 
import android.graphics.PorterDuff.Mode; 
import android.graphics.PorterDuffXfermode; 
import android.graphics.Rect; 
import android.graphics.RectF; 
import android.os.Bundle; 
import android.widget.ImageView; 



public class CircleImage extends Activity { 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.circle_layout); 
    ImageView img1 = (ImageView) findViewById(R.id.imageView1); 
    Bitmap bm = BitmapFactory.decodeResource(getResources(), 
      R.drawable.hair_four); 
    Bitmap resized = Bitmap.createScaledBitmap(bm, 100, 100, true); 
    Bitmap conv_bm = getRoundedRectBitmap(resized, 100); 
    img1.setImageBitmap(conv_bm); 
    // TODO Auto-generated method stub 
} 

public static Bitmap getRoundedRectBitmap(Bitmap bitmap, int pixels) { 
    Bitmap result = null; 
    try { 
     result = Bitmap.createBitmap(200, 200, Bitmap.Config.ARGB_8888); 
     Canvas canvas = new Canvas(result); 

     int color = 0xff424242; 
     Paint paint = new Paint(); 
     Rect rect = new Rect(0, 0, 200, 200); 

     paint.setAntiAlias(true); 
     canvas.drawARGB(0, 0, 0, 0); 
     paint.setColor(color); 
     canvas.drawCircle(50, 50, 50, paint); 
     paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); 
     canvas.drawBitmap(bitmap, rect, rect, paint); 

    } catch (NullPointerException e) { 
    } catch (OutOfMemoryError o) { 
    } 
    return result; 
} 

}

来源

2012-12-27 08:13:31 Sanghita

要获得更有效的实现，请参阅Romain Guy最近的[** Android Recipe＃1，带圆角的图像**]（ http://www.curious-creature.org/2012/12/11/android-recipe-1-image-with-rounded-corners/）博客文章。主要区别在于它使用“BitmapShader”来直接控制可见的“纹理”区域，从而将绘图逻辑简化为单次绘制调用。 –

嘿Sanghita，我遇到了相同的要求，碰巧使用你的代码，虽然它工作正常，因为显示图像我有一个问题。我用我的代替以下代码行来增加图像视图为canvas.drawCircle（90 ，90,90，油漆）;因为canvas.drawCircle（50,50,50，paint）;给了一个小的显示视图。然而只有四分之一的图像显示在imageview.Can你请帮忙？ – joy

将以下行更改为：Bitmap resized = Bitmap.createScaledBitmap（bm，600，600，true）; 位图conv_bm = getRoundedRectBitmap（resized，600）;结果= Bitmap.createBitmap（950,950，Bitmap.Config.ARGB_8888）; Rect rect = new Rect（0，0，650，650）; canvas.drawCircle（300，300，300，paint）; – Sanghita

试试这个代码是什么：如果你想要一个实际的圈子，那么你可以通过100px作为参数

public static Bitmap getRoundedRectBitmap(Bitmap bitmap, int pixels) { 
try { 
result = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), 
Bitmap.Config.ARGB_8888); 
canvas = new Canvas(result); 

color = 0xff424242; 
paint = new Paint(); 
rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 
rectF = new RectF(rect); 
roundPx = pixels; 

paint.setAntiAlias(true); 
canvas.drawARGB(0, 0, 0, 0); 
paint.setColor(color); 
canvas.drawRoundRect(rectF, roundPx, roundPx, paint); 

paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); 
canvas.drawBitmap(bitmap, rect, rect, paint); 
} catch (NullPointerException e) { 
// return bitmap; 
} catch (OutOfMemoryError o){} 
return result; 
}

。

来源

2012-12-27 07:13:07

由于一吨的帮助，你提供的解决方案是在没有尺寸修改的圆角矩形中的图片。它只需要几行更改 – Sanghita

@ ricintech-你们可以请你解释如何改变用这个代码绘制的圆的大小！图像裁剪和其他一切都是完美的，但不知道如何增加或减少圆的半径 – Khay

更新

有Github上可用CircleImageView。

您可以从Maven repository获取最新版本作为gradle依赖关系添加。

来源

2012-12-27 07:41:44

有很多关于这个教程的。我认为这会有所帮助。

https://github.com/lopspower/CircularImageView

https://github.com/wisemandesigns/CircularImageView

https://coderwall.com/p/hmzf4w

来源

2014-08-25 07:39:59 Yogendra

我们可以从XML代码管理的图像的高度和宽度，并且从Java代码绘制圆/椭圆形等

<ImageView 
      android:id="@+id/imageView1" 
      android:layout_width="@dimen/width" 
      android:layout_height="@dimen/height" 
      />

为椭圆形视图

ImageView img1 = (ImageView) findViewById(R.id.imageView1); 
Bitmap bm = BitmapFactory.decodeResource(getResources(), 
     R.drawable.user_image); 
Bitmap conv_bm = getRoundedBitmap(bm); 
img1.setImageBitmap(conv_bm); 


public static Bitmap getRoundedBitmap(Bitmap bitmap) 
{ 
    final Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); 
    final Canvas canvas = new Canvas(output); 

    final int color = Color.RED; 
    final Paint paint = new Paint(); 
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 
    final RectF rectF = new RectF(rect); 

    paint.setAntiAlias(true); 
    canvas.drawARGB(0, 0, 0, 0); 
    paint.setColor(color); 
    canvas.drawOval(rectF, paint); 
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); 
    canvas.drawBitmap(bitmap, rect, rect, paint); 

    bitmap.recycle(); 

    return output; 
    } 

}

来源

2015-06-12 11:13:11 ranjan

-1

public static Bitmap getCircleBitmap(Bitmap bitmap) { 
     final Bitmap circuleBitmap = Bitmap.createBitmap(bitmap.getWidth(), 
       bitmap.getWidth(), Bitmap.Config.ARGB_8888); 
     final Canvas canvas = new Canvas(circuleBitmap); 

     final int color = Color.RED; 
     final Paint paint = new Paint(); 
     final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getWidth()); 
     final RectF rectF = new RectF(rect); 

     paint.setAntiAlias(true); 
     canvas.drawARGB(0, 0, 0, 0); 
     paint.setColor(color); 
     canvas.drawOval(rectF, paint); 

     paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); 
     canvas.drawBitmap(bitmap, rect, rect, paint); 

     bitmap.recycle(); 

     return circuleBitmap; 
    }

来源

2016-05-09 11:27:52

如何使图像适合Android的圆形框架

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