如何以编程方式使图像角变圆 [英] How to make an image corner rounded programmatically

问题描述

我正在使用文本视图.它有一个图像作为背景.如何以编程方式绕过此图像的角?

I am using a text view. It has one image as background. How do I programmatically round this image's corner?

推荐答案

将您的图像转换为位图，然后将该位图转换为圆角位图.最后将该位图应用于您的 textview 背景.以下代码用于将位图转换为圆角位图图像.

Convert your image to bitmap and then convert that bitmap with rounded corners bitmap. Finally apply that bitmap to your textview background. The below code is for convert bitmap to rounded bitmap image.

public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,int roundPixelSize) { 
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); 
    Canvas canvas = new Canvas(output); 
    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 = roundPixelSize;
    paint.setAntiAlias(true);
    canvas.drawRoundRect(rectF,roundPx,roundPx, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint); 
    return output; 
}

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