Android：我的图像周围可以有圆形边框吗[重复]

Posted 2023-02-25

【中文标题】Android：我的图像周围可以有圆形边框吗[重复]

【英文标题】：Android: can i have round border around on my image [duplicate]

【发布时间】：2014-08-08 05:44:52

【问题描述】：

我成功地裁剪了圆形图像。但现在我想以编程方式在它周围添加圆形红色边框。 我尝试了很多东西来使用我拥有的代码，但它不起作用。 这是进行裁剪的类的代码

enter code here

import android.R.color;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
 import android.graphics.Paint;
import android.graphics.Path;

import android.graphics.Rect;
import android.graphics.RectF;

/**
 * GraphicsUtil an utility class which convert the image in circular shape
 */
 public class GraphicsUtil 

/*
 * Draw image in circular shape Note: change the pixel size if you want
 * image small or large
 */

  public Bitmap getRoundedShape(Bitmap scaleBitmapImage) 
    // TODO Auto-generated method stub
    int targetWidth = 400;
    int targetHeight = 400;
    Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, targetHeight,
            Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(targetBitmap);
    Path path = new Path();
    path.addCircle(((float) targetWidth) / 2, ((float) targetHeight) / 2,
            (Math.min(((float) targetWidth), ((float) targetHeight)) / 2),
            Path.Direction.CW);
    Paint paint = new Paint();
    paint.setColor(Color.GRAY);
    // paint.setStyle(Paint.Style.STROKE);
    Paint p = new Paint();
    p.setColor(color.white);
    p.setStyle(Paint.Style.STROKE);

    paint.setStyle(Paint.Style.FILL);
    paint.setAntiAlias(true);
    paint.setDither(true);
    paint.setFilterBitmap(true);
    canvas.drawOval(new RectF(0, 0, targetWidth, targetHeight), paint);
    // paint.setColor(Color.TRANSPARENT);
    canvas.clipPath(path);
    Bitmap sourceBitmap = scaleBitmapImage;
    canvas.drawBitmap(sourceBitmap, new Rect(0, 0, sourceBitmap.getWidth(),
            sourceBitmap.getHeight()), new RectF(0, 0, targetWidth,
            targetHeight), paint);

    return targetBitmap;
     
   

【参考方案1】：

请尝试以下代码为图像周围的圆角边框，此函数显示圆角图像以及图像视图的边框

public Bitmap getCircleBitmap(Bitmap bitmap, int pixels) 
        Bitmap output = Bitmap.createBitmap(100, 100,
                Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);

        final int color = 0xffffffff;
        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, 100, 100);
        final RectF rectF = new RectF(rect);
        paint.setAntiAlias(true);
        paint.setDither(true);
        paint.setFilterBitmap(true);
        canvas.drawARGB(0, 0, 0, 0);
        paint.setColor(color);
        paint.setShadowLayer(4.0f, 0.0f, 2.0f, Color.GREEN);
        canvas.drawOval(rectF, paint);
        paint.setColor(Color.BLUE);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth((float) 4);
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        canvas.drawBitmap(bitmap, rect, rect, paint);
        return output;
    

【讨论】：

是的，我试过这段代码。问题是我无法更改输出图像大小，主要是我仍然没有得到图像周围的边框