Glide ImageView Gif动态图圆角

参考文章

Glide 知识梳理(3) - 自定义transform
glide-transformations

aaa.gif

以前写过一篇自定义ImageView的设置圆角的，但是那个自定义的不可以加载gif动态图的，这次采用transformation的方式来实现，其实思想都差不多的，只是换个套路实现了一下
Glide 版本：4.9.0

总结

1、toTransform 表示网络下载的原图的Bitmap
2、outWidth、outHeight 表示我们ImageView的大小

/**
* @date: 创建时间:2019/10/23
* @author: gaoxiaoxiong
* @descripion:定义Glide的trasformation ，定义圆角
**/
public class FilletTransformation  extends BitmapTransformation {
    public int radius = 5;
    private boolean topLeftRight = false;  //上---左右都会圆角
    private boolean bottomLeftRight = false;//下----左右都会圆角
    public FilletTransformation (int neradius,boolean topRadius,boolean botomRadius){
        this.radius = DensityUtil.getInstance().dip2px(neradius);
        this.topLeftRight = topRadius;
        this.bottomLeftRight = botomRadius;
    }

    @Override
    protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
        Bitmap resultBitmap = pool.get(outWidth,outHeight, getAlphaSafeConfig(toTransform));
        BitmapShader bitmapShader = new BitmapShader(toTransform, Shader.TileMode.CLAMP,Shader.TileMode.CLAMP);
        float scaleMax = 1.0f;
        // 如果图片的宽或者高与view的宽高不匹配，计算出需要缩放的比例；缩放后的图片的宽高，一定要大于我们view的宽高；所以我们这里取大值；
        if (outWidth != toTransform.getWidth() || outHeight !=toTransform.getHeight()){
            scaleMax = Math.max((float) outWidth / (float)toTransform.getWidth(),(float)outHeight / (float)toTransform.getHeight());
        }
        Matrix matrix = new Matrix();
        matrix.setScale(scaleMax,scaleMax);
        bitmapShader.setLocalMatrix(matrix);
        Paint mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setShader(bitmapShader);
        Canvas canvas = new Canvas(resultBitmap);
        RectF drawRectF = new RectF(0,0,outWidth,outHeight);
        canvas.drawRoundRect(drawRectF,radius,radius,mPaint);
        if (topLeftRight){
            //左边底部
            canvas.drawRect(0,canvas.getHeight() - radius ,radius,canvas.getHeight(),mPaint);
            //右边底部
            canvas.drawRect(canvas.getWidth() - radius, canvas.getHeight() - radius,canvas.getWidth(),canvas.getHeight(),mPaint);
        }

        if (bottomLeftRight){
            //左边顶部
            canvas.drawRect(0,0,radius,radius,mPaint);
            //右边顶部
            canvas.drawRect(canvas.getWidth() - radius,0,canvas.getWidth(),radius,mPaint);
        }
        clear(canvas);
        return resultBitmap;
    }

    @Override
    public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {

    }

    // Avoids warnings in M+.
    private void clear(Canvas canvas) {
        canvas.setBitmap(null);
    }

    private Bitmap.Config getAlphaSafeConfig(@NonNull Bitmap inBitmap) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            // Avoid short circuiting the sdk check.
            if (Bitmap.Config.RGBA_F16.equals(inBitmap.getConfig())) { // NOPMD
                return Bitmap.Config.RGBA_F16;
            }
        }
        return Bitmap.Config.ARGB_8888;
    }
}