Question

查看图片角落。请帮忙

我希望将图像的左下角和左上角四舍五入，同时将其设置为图像视图

我的代码：

private static Bitmap createRoundedRectBitmap(@NonNull Bitmap bitmap, float topLeftCorner, float topRightCorner, float bottomRightCorner, float bottomLeftCorner) { Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output);
final int color = Color.WHITE;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
Path path = new Path();
float[] radii = new float[]{
        topLeftCorner, bottomLeftCorner,
        topRightCorner, topRightCorner,
        bottomRightCorner, bottomRightCorner,
        bottomLeftCorner, bottomLeftCorner
};

paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
path.addRoundRect(rectF, radii, Path.Direction.CW);
canvas.drawPath(path, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}

Answer 1

这个xml会给你左上角和下角。

WebView

根据您的要求修改和创建您的drawable

Answer 2

我一起使用了这两个功能：

public Bitmap getRoundedSquareBitmap(Bitmap bitmap) {
        Bitmap output;

        output = Bitmap.createBitmap(bitmap.getHeight(), bitmap.getHeight(), Bitmap.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.WHITE);

        canvas.drawPath(RoundedRect(0, 0, bitmap.getWidth(), bitmap.getHeight(), 5, 5, true), paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(bitmap, rect, rect, paint);

        if (output.getWidth() > AppSharedPref.instance.getScreenWidth() * 2)
            output = Bitmap.createScaledBitmap(output, output.getWidth() / 3, output.getWidth() / 3, false);
        else
            output = Bitmap.createScaledBitmap(output, output.getWidth() / 2, output.getWidth() / 2, false);
        return output;
    }

然后从另一篇文章中使用它： https://stackoverflow.com/a/28655800/4336375

public Path RoundedRect(float left, float top, float right, float bottom, float rx, float ry, boolean conformToOriginalPost) {
        Path path = new Path();
        if (rx < 0) rx = 0;
        if (ry < 0) ry = 0;
        float width = right - left;
        float height = bottom - top;
        if (rx > width / 2) rx = width / 2;
        if (ry > height / 2) ry = height / 2;
        float widthMinusCorners = (width - (2 * rx));
        float heightMinusCorners = (height - (2 * ry));

        path.moveTo(right, top + ry);
        path.rQuadTo(0, -ry, -rx, -ry);//top-right corner
        path.rLineTo(-widthMinusCorners, 0);
        path.rQuadTo(-rx, 0, -rx, ry); //top-left corner
        path.rLineTo(0, heightMinusCorners);

        if (conformToOriginalPost) {
            path.rLineTo(0, ry);
            path.rLineTo(width, 0);
            path.rLineTo(0, -ry);
        } else {
            path.rQuadTo(0, ry, rx, ry);//bottom-left corner
            path.rLineTo(widthMinusCorners, 0);
            path.rQuadTo(rx, 0, rx, -ry); //bottom-right corner
        }

        path.rLineTo(0, -heightMinusCorners);

        path.close();//Given close, last lineto can be removed.

        return path;
    }

修改代码，根据要求将图像裁剪为圆角矩形。

Answer 3

可以使用drawable来设置图像背景。

可绘制左上角和左下角的圆角。

<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@android:color/darker_gray" />
<corners
    android:bottomLeftRadius="6dp"
    android:bottomRightRadius="0dp"
    android:topLeftRadius="6dp"
    android:topRightRadius="0dp" />

可绘制右上角和右下角的圆角。

<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@android:color/darker_gray" />
<corners
    android:bottomLeftRadius="0dp"
    android:bottomRightRadius="6dp"
    android:topLeftRadius="0dp"
    android:topRightRadius="6dp" />

可以在recyclerView viewHolder中以编程方式更改图像的背景。

如何将左下角和右上角设置为舍入到我的图像视图？

3 个答案: