Android(安卓)开发：glide圆角正确实现方法

鉴于昨天很晚测试了一堆码后

我得出结论Glide4 我玩不转啊 /大哭

不过测试的好几个百度到的示例有的方法明显过时有的性能啧啧不敢恭维...

其中比较好用的有如下两个

直接抄砖吧....

/**  * 圆形 **/public class GlideCircleTransform extends BitmapTransformation {    private static final String ID = "com.examle.nnp.ah.glide.GlideCircleTransform";    private static final byte[] ID_BYTES = ID.getBytes(CHARSET);    @Override    protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {        int size = Math.min(toTransform.getWidth(), toTransform.getHeight());        int x = (toTransform.getWidth() - size) / 2;        int y = (toTransform.getHeight() - size) / 2;        Bitmap square = Bitmap.createBitmap(toTransform, x, y, size, size);        Bitmap circle = pool.get(size, size, Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(circle);        Paint paint = new Paint();        paint.setShader(new BitmapShader(square, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));        paint.setAntiAlias(true);        float r = size / 2f;        canvas.drawCircle(r, r, r, paint);        return circle;    }    @Override    public boolean equals(Object obj) {        return obj instanceof GlideCircleTransform;    }    @Override    public int hashCode() {        return ID.hashCode();    }    @Override    public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {        messageDigest.update(ID_BYTES);    }}

/**  * 圆角 **/public class GlideRoundTransform  extends BitmapTransformation {    private static final String ID = "com.examle.nnp.ah.glide.GlideRoundTransform";    private static final byte[] ID_BYTES = ID.getBytes(CHARSET);    private int radius;    public GlideRoundTransform(Context context, int radius) {        this.radius = UUi.dp2px(radius);    }    @Override    protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {        int width = toTransform.getWidth();        int height = toTransform.getHeight();        Bitmap bitmap = pool.get(width, height, Bitmap.Config.ARGB_8888);        bitmap.setHasAlpha(true);        Canvas canvas = new Canvas(bitmap);        Paint paint = new Paint();        paint.setAntiAlias(true);        paint.setShader(new BitmapShader(toTransform, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));        canvas.drawRoundRect(new RectF(0, 0, width, height), radius, radius, paint);        return bitmap;    }    @Override    public boolean equals(Object obj) {        if (obj instanceof GlideRoundTransform) {            GlideRoundTransform other = (GlideRoundTransform) obj;            return radius == other.radius;        }        return false;    }    @Override    public int hashCode() {        return Util.hashCode(ID.hashCode(), Util.hashCode(radius));    }    @Override    public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {        messageDigest.update(ID_BYTES);        byte[] radiusData = ByteBuffer.allocate(4).putInt(radius).array();        messageDigest.update(radiusData);    }}

--------------------------------------------------------分 ---- 割 -----线----------------------------------------------------------------

到最后我查阅官方文档发现....

新版的Glide里面已经封装了相关的方法

RequestOptions options = new RequestOptions(); //圆角options.bitmapTransform(new RoundedCorners(1));

RequestOptions options = new RequestOptions(); //圆形options.bitmapTransform(new CircleCrop());

哭死.... 不说了前面又有个坑我先去踩了....

最后... 用完这个还是没解决您的问题不妨试试这个自定义的类

/** * @作者: yzq * @创建日期: 2019/8/7 20:25 * @文件作用: 绘制圆角图 **/public class GlideRoundTransform extends BitmapTransformation {    private static float radius = 0f;    private static int type = 0;    public GlideRoundTransform() {        this(4);    }    public GlideRoundTransform(int dp) {        super();        this.type = 0;        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;    }    /**     * @param dp     * @param type 为1 则只绘制 图片上面两个圆角     */    public GlideRoundTransform(int dp, int type) {        super();        this.type = type;        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;    }    @Override    protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {        //变换的时候裁切        Bitmap bitmap = TransformationUtils.centerCrop(pool, toTransform, outWidth, outHeight);        return roundCrop(pool, bitmap);    }    @Override    public void updateDiskCacheKey(MessageDigest messageDigest) {    }    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);        if (type == 0) {            RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());            canvas.drawRoundRect(rectF, radius, radius, paint);        }        if (type == 1) {            RectF rectRound = new RectF(0f, 100f, source.getWidth(), source.getHeight());            canvas.drawRect(rectRound, paint);        }        return result;    }}

调用

RequestOptions options = new RequestOptions();            options.centerCrop()                    .placeholder(R.drawable.c_error) //预加载                    .error(R.drawable.c_error)      //失败                    .priority(Priority.IMMEDIATE) //优先级                    .diskCacheStrategy(DiskCacheStrategy.RESOURCE)//设置缓存策略                    .transform(new GlideRoundTransform(cornerRadius,type));//设置四角圆角Glide.with(context).load(url).apply(options).into(imageView);

当然你要想了解更多Glide的使用可参阅：https://www.cnblogs.com/94xiyang/p/9662042.html

https://blog.csdn.net/huangxiaoguo1/article/details/78543224

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