Glide.with(mContext)
    .load(data.getSignFilePath())
    .transform(new CenterCrop(mContext),newGlideRoundTransform(mContext))
    .diskCacheStrategy(DiskCacheStrategy.ALL)
    .placeholder(R.drawable.shenpi_jiazai)
    .dontAnimate()
    .crossFade()
    .into(twoTodoCheckDetailsImg);


创建一个工具类


/**
 *
 * 加载圆角图片
 * *@author：txm
 *
 * @class: 说明：
 * Created by admin on 2018/7/2.
 */

public class GlideRoundTransform extends BitmapTransformation {

    private static float radius = 0f;

    /**
     * 构造函数 默认圆角半径 4dp
     *
     * @param context Context
     */
    public GlideRoundTransform(Context context) {
        this(context, 4);
    }

    /**
     * 构造函数
     *
     * @param context Context
     * @param dp 圆角半径
     */
    public GlideRoundTransform(Context context, int dp) {
        super(context);
        radius = Resources.getSystem().getDisplayMetrics().density * dp;
    }

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

    private static Bitmap roundCrop(BitmapPool pool, Bitmap source) {
        if (source == null) return null;

        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);
        RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());
        canvas.drawRoundRect(rectF, radius, radius, paint);
        return result;
    }

    @Override
    public String getId() {
        return getClass().getName() + Math.round(radius);
    }
}