如何使带有圆角的ImageView的 [英] How to make an ImageView with rounded corners

问题描述

在Android上，一个ImageView的是一个默认的矩形。我怎样才能使它在ImageView的圆角矩形（剪掉所有的4个角落我的位图进行圆角矩形）？

In Android, an ImageView is a rectangle by default. How can I make it a rounded rectangle (clip off all 4 corners of my Bitmap to be rounded rectangles) in the ImageView?

推荐答案

这是pretty的后期反应，但对于其他人是找这个，你可以手动轮请执行下列操作code图像的角落。

This is pretty late in response, but for anyone else that is looking for this, you can do the following code to manually round the corners of your images.

http://www.ruibm.com/?p=184

这是不是我的code，但我用它和它的奇妙的作品。我用它作为一个ImageHelper类中的一个辅助和扩展它只是有点传入羽化我需要一个给定的图像数量。

This isn't my code, but I've used it and it's works wonderfully. I used it as a helper within an ImageHelper class and extended it just a bit to pass in the amount of feathering I need for a given image.

最后code是这样的：

Final code looks like this:

package com.company.app.utils;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;

public class ImageHelper {
    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 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;
    }
}

希望这可以帮助别人！

Hope this helps someone!

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