Glide加载图片成圆角

Google推荐的图片加载库Glide介绍

导入库

dependencies {

compile 'com.github.bumptech.glide:glide:4.0.0-RC0'

}

加载图片的方式

Glide.with(mContext)        .load(image)        .into(view);

如果需要加载圆角图片则需要重写

BitmapTransformation

public class GlideRoundTransform extends BitmapTransformation {    private static float radius = 0f;    public GlideRoundTransform(Context context) {        this(context, 4);    }    public GlideRoundTransform(Context context, int dp) {        super(context);        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;    }    @Override    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {        Bitmap bitmap = TransformationUtils.centerCrop(pool, toTransform, outWidth, outHeight);        return roundCrop(pool, bitmap);    }    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;    }    public String getId() {        return getClass().getName() + Math.round(radius);    }    @Override    public void updateDiskCacheKey(MessageDigest messageDigest) {    }

然后加载

  RequestOptions myOptions = new RequestOptions()                .centerCrop()                .transform(new GlideRoundTransform(mContext, 8));        ImageView view = getView(viewId);        Glide.with(mContext)                .load(Utils.getImageUrl(url))                .apply(myOptions)                .into(view);