基于Glide4.0.0RC1 BitmapTransformation给图片加上各类圆角，并提供将四小图合成大图

/**
 * Email [email protected]
 * Edit androidStudio
 * desc : 将图片转化为给类的特殊圆角图片
 */
public class GlideRoundedCornersTransform extends BitmapTransformation {
    private float mRadius;
    private CornerType mCornerType;
    private static final int VERSION = 1;
    private static final String ID = BuildConfig.APPLICATION_ID+"GlideRoundedCornersTransform." + VERSION;
    private static final byte[] ID_BYTES = ID.getBytes(CHARSET);


    public enum CornerType {
        ALL,
        TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT,
        TOP, BOTTOM, LEFT, RIGHT,
        TOP_LEFT_BOTTOM_RIGHT,
        TOP_RIGHT_BOTTOM_LEFT,
        TOP_LEFT_TOP_RIGHT_BOTTOM_RIGHT,
        TOP_RIGHT_BOTTOM_RIGHT_BOTTOM_LEFT,
    }

    public GlideRoundedCornersTransform(float radius, CornerType cornerType) {
        super();
        mRadius = UiUtils.dp2px(radius);//dp ->px
        mCornerType = cornerType;
    }

    @Override
    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
        return roundCrop(pool, toTransform);
    }

    private Bitmap roundCrop(BitmapPool pool, Bitmap source) {
        if (source == null) {
            return null;
        }
        int width = source.getWidth();
        int height = source.getHeight();
        Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);


        if (result == null) {
            result = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config
                    .ARGB_8888);
        }
        Canvas canvas = new Canvas(result);
        Paint paint = new Paint();
        paint.setShader(new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader
                .TileMode.CLAMP));

 

        paint.setAntiAlias(true);

 

 

        Path path = new Path();
        drawRoundRect(canvas, paint, path, width, height);

        return result;
    }

    private void drawRoundRect(Canvas canvas, Paint paint, Path path, int width, int height) {
         float[] rids ;
        switch (mCornerType) {
            case ALL:
                rids = new float[]{mRadius,mRadius,mRadius,mRadius,mRadius,mRadius,mRadius,mRadius};
                drawPath(rids,canvas, paint, path, width, height);
                break;
            case TOP_LEFT:
                rids = new float[]{mRadius,mRadius,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f};
                drawPath(rids,canvas, paint, path, width, height);
                break;
            case TOP_RIGHT:
                rids  = new float[]{0.0f,0.0f,mRadius,mRadius,0.0f,0.0f,0.0f,0.0f};
                drawPath(rids,canvas, paint, path, width, height);
                break;
            case BOTTOM_RIGHT:
                rids  = new float[]{0.0f,0.0f,0.0f,0.0f,mRadius,mRadius,0.0f,0.0f};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case BOTTOM_LEFT:
                rids  = new float[]{0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,mRadius,mRadius};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case TOP:
                rids = new float[]{mRadius,mRadius,mRadius,mRadius,0.0f,0.0f,0.0f,0.0f};
                drawPath(rids,canvas,  paint,  path,width, height);
                break;
            case BOTTOM:
                rids  = new float[]{0.0f,0.0f,0.0f,0.0f,mRadius,mRadius,mRadius,mRadius};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case LEFT:
                rids = new float[]{mRadius,mRadius,0.0f,0.0f,0.0f,0.0f,mRadius,mRadius};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case RIGHT:
                rids  = new float[]{0.0f,0.0f,mRadius,mRadius,mRadius,mRadius,0.0f,0.0f};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case TOP_LEFT_BOTTOM_RIGHT:
                rids  = new float[]{mRadius,mRadius,0.0f,0.0f,mRadius,mRadius,0.0f,0.0f};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case TOP_RIGHT_BOTTOM_LEFT:
                rids  = new float[]{0.0f,0.0f,mRadius,mRadius,0.0f,0.0f,mRadius,mRadius};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case TOP_LEFT_TOP_RIGHT_BOTTOM_RIGHT:
                rids  = new float[]{mRadius,mRadius,mRadius,mRadius,mRadius,mRadius,0.0f,0.0f};
                drawPath(rids,canvas,  paint, path, width, height);
                break;
            case TOP_RIGHT_BOTTOM_RIGHT_BOTTOM_LEFT:
                rids  = new float[]{0.0f,0.0f,mRadius,mRadius,mRadius,mRadius,mRadius,mRadius};
                drawPath(rids,canvas,  paint,  path,width, height);
                break;
            default:
                throw new RuntimeException("RoundedCorners type not belong to CornerType");


        }
    }


    /**@param rids 圆角的半径，依次为左上角xy半径，右上角，右下角，左下角*/
    private void drawPath(float[] rids,Canvas canvas,Paint paint,Path path, int width, int height) {
        path.addRoundRect(new RectF(0, 0, width, height), rids, Path.Direction.CW);
//        canvas.clipPath(path);
        canvas.drawPath(path,paint);
    }


    @Override
    public boolean equals(Object o) {
        return o instanceof GlideRoundedCornersTransform;
    }


    @Override
    public int hashCode() {
        return ID.hashCode();
    }


    @Override
    public void updateDiskCacheKey(MessageDigest messageDigest) {
        messageDigest.update(ID_BYTES);
    }

}

//glide4.00  加载图片 代码施加圆角代码

       RequestOptions requestOptions = new RequestOptions();
//        requestOptions.circleCrop();
//        requestOptions.optionalTransform(new CircleCrop());
//        requestOptions.optionalTransform(new RoundedCorners(100));
        requestOptions.optionalTransform(new GlideRoundedCornersTransform(100,
                GlideRoundedCornersTransform.CornerType.TOP_LEFT));
        Glide.with(this).load("https://gss3.bdstatic" +
                ".com/-Po3dSag_xI4khGkpoWK1HF6hhy/baike/c0%3Dbaike116%2C5%2C5%2C116%2C38/sign" +
                "=b214b363d754564ef168ec6bd2b7f7e7/7e3e6709c93d70cfc087257df2dcd100baa12b45.jpg")
                .apply(requestOptions)
                .into(image);

由于glide4.00 裁剪圆形图片，官方已给出，就不需要自定义bitmapTransform了

 

<--!   以下给出效果图 !-->

 

 

 

github链接地址：https://github.com/pingcc/ImageApplication