Glide加载圆角图片

1.导包   

implementation 'com.github.bumptech.glide:glide:3.6.1'

 

public class GlideRoundCornersTransUtils implements Transformation {


    private BitmapPool mBitmapPool;
    private int             mRadius;
    private int             mDiameter;
    private CornerType mCornerType = ALL;
    private DisplayMetrics metrics;


    public GlideRoundCornersTransUtils(Context context, int radius, CornerType type) {
        mBitmapPool = Glide.get(context).getBitmapPool();
        metrics = context.getResources().getDisplayMetrics();
        mRadius = (int) (radius * (metrics.densityDpi / 160f));
        mCornerType = type;
        mDiameter = 2 * mRadius;
    }

    public enum CornerType {
        /** 所有角 */
        ALL,
        /** 左上 */
        LEFT_TOP,
        /** 左下 */
        LEFT_BOTTOM,
        /** 右上 */
        RIGHT_TOP,
        /** 右下 */
        RIGHT_BOTTOM,
        /** 左侧 */
        LEFT,
        /** 右侧 */
        RIGHT,
        /** 下侧 */
        BOTTOM,
        /** 上侧 */
        TOP,
    }

    @Override
    public Resource transform(Resource resource, int outWidth, int outHeight) {
        Bitmap source = resource.get();
        int    width  = source.getWidth();
        int    height = source.getHeight();
        Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
        if (bitmap == null) {
            bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        }
        Canvas canvas = new Canvas(bitmap);
        Paint  paint  = new Paint();
        paint.setAntiAlias(true);
        paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
        drawRoundRect(canvas, paint, width, height);
        return BitmapResource.obtain(bitmap, mBitmapPool);
    }

    private void drawRoundRect(Canvas canvas, Paint paint, float width, float height) {
        switch (mCornerType) {
            case LEFT_TOP:
                drawLeftTopCorner(canvas, paint, width, height);
                break;
            case LEFT_BOTTOM:
                drawLeftBottomCorner(canvas, paint, width, height);
                break;
            case RIGHT_TOP:
                drawRightTopCorner(canvas, paint, width, height);
                break;
            case RIGHT_BOTTOM:
                drawRightBottomCorner(canvas, paint, width, height);
                break;
            case LEFT:
                drawLeftCorner(canvas, paint, width, height);
                break;
            case RIGHT:
                drawRightCorner(canvas, paint, width, height);
                break;
            case BOTTOM:
                drawBottomCorner(canvas, paint, width, height);
                break;
            case TOP:
                drawTopCorner(canvas, paint, width, height);
                break;
            case ALL:
            default:
                canvas.drawRoundRect(new RectF(0, 0, width, height), mRadius, mRadius, paint);
                break;
        }
    }


    /**
     * 画左上角
     */
    private void drawLeftTopCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(mRadius, 0, width, height), paint);
        canvas.drawRect(new RectF(0, mRadius, mRadius, height), paint);
        canvas.drawArc(new RectF(0, 0, mDiameter, mDiameter), 180, 90, true, paint);
    }

    /**
     * 画左下角
     */
    private void drawLeftBottomCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(0, 0, width, height - mRadius), paint);
        canvas.drawRect(new RectF(mRadius, height - mRadius, width, height), paint);
        canvas.drawArc(new RectF(0, height - mDiameter, mDiameter, height), 90, 90, true, paint);
    }

    /**
     * 画右上角
     */
    private void drawRightTopCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(0, 0, width - mRadius, height), paint);
        canvas.drawRect(new RectF(width - mRadius, mRadius, width, height), paint);
        canvas.drawArc(new RectF(width - mDiameter, 0, width, mDiameter), 270, 90, true, paint);
    }

    /**
     * 画右下角
     */
    private void drawRightBottomCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(0, 0, width, height - mRadius), paint);
        canvas.drawRect(new RectF(0, height - mRadius, width - mRadius, height), paint);
        canvas.drawArc(new RectF(width - mDiameter, height - mDiameter, width, height), 0, 90, true, paint);
    }

    /**
     * 画左 角
     */
    private void drawLeftCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(mRadius, 0, width, height), paint);
        canvas.drawRect(new RectF(0, mRadius,  mRadius, height-mRadius), paint);
        canvas.drawArc(new RectF(0, 0, mDiameter, mDiameter), 180, 90, true, paint);
        canvas.drawArc(new RectF(0, height - mDiameter, mDiameter, height), 90, 90, true, paint);
    }

    /**
     * 画右角
     */
    private void drawRightCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(0, 0, width - mRadius, height), paint);
        canvas.drawRect(new RectF(width-mRadius, mRadius, width, height-mRadius), paint);
        canvas.drawArc(new RectF(width - mDiameter, 0, width, mDiameter), 270, 90, true, paint);
        canvas.drawArc(new RectF(width - mDiameter, height - mDiameter, width, height), 0, 90, true, paint);
    }

    /**
     * 画上 角
     */
    private void drawTopCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(0, mRadius, width, height), paint);
        canvas.drawRect(new RectF(mRadius, 0, width-mRadius, mRadius), paint);
        canvas.drawArc(new RectF(0, 0, mDiameter, mDiameter), 180, 90, true, paint);
        canvas.drawArc(new RectF(width - mDiameter, 0, width, mDiameter), 270, 90, true, paint);
    }

    /**
     * 画下 角
     */
    private void drawBottomCorner(Canvas canvas, Paint paint, float width, float height) {
        canvas.drawRect(new RectF(0, 0, width, height - mRadius), paint);
        canvas.drawRect(new RectF(mRadius, height-mRadius, width-mRadius, height), paint);
        canvas.drawArc(new RectF(0, height - mDiameter, mDiameter, height), 90, 90, true, paint);
        canvas.drawArc(new RectF(width - mDiameter, height - mDiameter, width, height), 0, 90, true, paint);
    }


    @Override
    public String getId() {
        return "RoundedTransformation(radius=" + mRadius + ", diameter=" + mDiameter + ")";
    }



}

用法

Glide.with(this).load(R.mipmap.pretty_1).bitmapTransform( new GlideRoundCornersTransUtils(this,25,GlideRoundCornersTransUtils.CornerType.TOP)).into(iv_Round2);

 

如果要加载圆角如下

public class GlideCircleTransUtils extends BitmapTransformation {
    public GlideCircleTransUtils(Context context) {
        super(context);
    }

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

    private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {
        if (source == null) return null;
        //获取资源的长宽,获取最小值 子位图的像素个数
        int size = Math.min(source.getWidth(), source.getHeight());
        // 子位图第一个像素在源位图的X坐标
        int x = (source.getWidth() - size) / 2;
        //子位图第一个像素在源位图的y坐标
        int y = (source.getHeight() - size) / 2;
        //创建新位图  source 源位图
        Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);
        //返回一个正好匹配给定宽、高和配置的只包含透明像素的Bitmap
        // 如果BitmapPool中找不到这样的Bitmap，就返回null
        Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
        //当返回null 时,创建给定宽、高和配置的新位图
        if (result == null) {
            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
        }
        //画图
        Canvas canvas = new Canvas(result);
        Paint paint = new Paint();
        // 设置shader
        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        //抗锯齿
        paint.setAntiAlias(true);
        float r = size / 2f;
        // 用设置好的画笔绘制一个圆
        canvas.drawCircle(r, r, r, paint);
        return result;
    }

    @Override
    public String getId() {
        return getClass().getName();
    }
}

用法如下

Glide.with(this).load(imgurl).transform(new GlideCircleTransUtils(this)).into(iv_circle);

glide4.0以上的用法   .apply(RequestOptions.bitmapTransform());放在这个里面

.apply(RequestOptions.bitmapTransform(new GlideCircleUtils(imageView.getContext())))