1、重寫BITMAPTRANSFORMATION

重寫方法解決沖突，來自CSDN的一個解決方案

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;}@Overrideprotected 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);}@Overridepublic void updateDiskCacheKey(MessageDigest messageDigest) {} }

在加載的時候使用

RequestOptions myOptions = new RequestOptions() .transform(new GlideRoundTransform(this,30)); Glide.with(this) .load(R.drawable.item1) .apply(myOptions) .into(icon1);

地址http://blog.csdn.net/flyinbed_/article/details/75506062

2、使用第三方框架

庫地址：?
https://github.com/wasabeef/glide-transformations

該庫是專門針對glide的一個輔助類，包括裁剪?
效果圖?

引入方法

compile 'jp.wasabeef:glide-transformations:3.0.1'

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使用方法

Glide.with(mContext).load(aClass.img).apply(RequestOptions.bitmapTransform(new MultiTransformation(new CenterCrop(),new RoundedCornersTransformation(SizeUtils.dp2px(5), 0, RoundedCornersTransformation.CornerType.TOP)))).into(imageView);

這里RoundedCornersTransformation的第一個參數需要轉換成像素

總結

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