圆形快速接触徽章

Question

大家好我有联系人列表查看快速联系徽章。它显示方形图像，但我的要求是显示圆形快速联系徽章（如下面的屏幕截图）。 Plz让我知道如何实现这一目标。在此先感谢。

Answer 1

以下是两种创建圆形图像的方法。你只需要传递位图图像使它成为圆形。

/**
 * To make image in a round shape. Use this method if you want to specify required height and width
 * 
 * @param i
 */
public static Bitmap getRoundedShape(Bitmap scaleBitmapImage, int i) {
    int targetWidth = i;
    int targetHeight = i;
    Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, targetHeight,
            Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(targetBitmap);
    Path path = new Path();
    path.addCircle(((float) targetWidth - 1) / 2,
            ((float) targetHeight - 1) / 2,
            (Math.min(((float) targetWidth), ((float) targetHeight)) / 2),
            Path.Direction.CCW);
    canvas.clipPath(path);
    Bitmap sourceBitmap = scaleBitmapImage;
    canvas.drawBitmap(sourceBitmap, new Rect(0, 0, sourceBitmap.getWidth(),
            sourceBitmap.getHeight()), new Rect(0, 0, targetWidth,
            targetHeight), null);
    return targetBitmap;
}

/**
 * To make image in a round shape
 */

public static Bitmap getCroppedBitmap(Bitmap bitmap) {
    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());

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    // canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
    canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
            bitmap.getWidth() / 2, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    // Bitmap _bmp = Bitmap.createScaledBitmap(output, 60, 60, false);
    // return _bmp;
    return output;
}

Answer 2

现在有一天，你应该研究一下RoundedBitmapDrawable。

可以轻松创建圆形绘图

Bitmap bitmap = <the bitmap you want to be circular>
RoundedBitmapDrawable drawable = RoundedBitmapDrawableFactory.create(getResources(), bitmap);

别忘了（感谢Gil SH指出这一点）：

drawable.setCornerRadius(Math.max(bitmap.getWidth(), bitmap.getHeight()) / 2.0f);

来源：https://developer.android.com/reference/android/support/v4/graphics/drawable/RoundedBitmapDrawable.html