Question

我使用以下方法获取圆角图像。我希望我的图像有白色边框。我怎么能得到这个？任何人都可以为此提出建议。

dispImage=ImageHelper.getRoundedCornerBitmap(resized, 150);

        imageView.setImageBitmap(dispImage);


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

        final int color = 0xff424242;
        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
//        final RectF rectF = new RectF(rect);
        final RectF rectF = new RectF(10, 10, bitmap.getWidth()-10, bitmap.getHeight()-10);
        final float 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);

        return output;
    }

Answer 1

这对你有帮助。

public Bitmap getRoundedCornerBitmap(Bitmap bitmap, int color, int cornerDips, int borderDips, Context context) {
    mContext = context;

    System.out.println("in rounded corner bitmap: "+color);

    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
            Bitmap.Config.ARGB_4444);
    Canvas canvas = new Canvas(output);

    final int borderSizePx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, (float) borderDips,
            context.getResources().getDisplayMetrics());
    final int cornerSizePx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, (float) cornerDips,
            context.getResources().getDisplayMetrics());
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);

    // prepare canvas for transfer
    paint.setAntiAlias(true);
    paint.setColor(0xFFFFFFFF);
    paint.setStyle(Paint.Style.FILL);
    canvas.drawARGB(0, 0, 0, 0);
    canvas.drawRoundRect(rectF, cornerSizePx, cornerSizePx, paint);

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

    // draw border
    paint.setColor(color);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth((float) borderSizePx);
    canvas.drawRoundRect(rectF, cornerSizePx, cornerSizePx, paint);

    return output;
}

使用以下方法获取圆形位图：

bm=getRoundedCornerBitmap(bm,color, 10, 20, mContext);

传递颜色如下：

Color.argb(255, 199, 153, 29) or Color Hexvalue

Answer 2

在drawBitmap（）调用后将其添加到您的代码中：

final int whiteColor = 0xffffff;
paint.setColor(whiteColor);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth((float) borderSizePx);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

如何在android中获得圆形图像的白色边框？

2 个答案: