Android 用圆角画正方形

我能画一个有锐边的矩形，现在我需要把锐边变成圆形

怎么做

这是我的代码：

 public void drawShape(Canvas canvas, Renderer renderer, float x, float y,
      int seriesIndex, Paint paint) {
    float halfShapeWidth = shape_width / 2;
    canvas.drawRect(x , y - halfShapeWidth, x + SHAPE_WIDTH, y + halfShapeWidth, paint);
   }

如何通过传递相同的参数来生成此圆角矩形？

您可以使用

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在调用此函数之前，您需要将位置和尺寸打包到一个RectF中。

好的，我使用以下代码自己解决了此问题：

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;
    }

RectF r = new RectF(1,2,3,4);
canvas.drawRoundRect(r, 0, 0, mPaint);

希望它能帮助别人