Android使用glide实现毛玻璃效果

/**
* 毛玻璃效果
* Created by wjs on 2017/11/20.
*/
public class BlurTransformation extends BitmapTransformation {

private RenderScript rs;
private int radius;

public BlurTransformation(Context context, int radius) {
super(context);
rs = RenderScript.create(context);
this.radius = radius;
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
Bitmap blurredBitmap = toTransform.copy(Bitmap.Config.ARGB_8888, true);

// Allocate memory for Renderscript to work with
//分配用于渲染脚本的内存
Allocation input = Allocation.createFromBitmap(
rs,
blurredBitmap,
Allocation.MipmapControl.MIPMAP_FULL,
Allocation.USAGE_SHARED
);
Allocation output = Allocation.createTyped(rs, input.getTyp
bdfe
e());

// Load up an instance of the specific script that we want to use.
//加载我们想要使用的特定脚本的实例
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setInput(input);

// Set the blur radius
//设置模糊半径
script.setRadius(radius);

// Start the ScriptIntrinisicBlur
//启动ScriptIntrinisicBlur
script.forEach(output);

// Copy the output to the blurred bitmap
//将输出复制到模糊的位图
output.copyTo(blurredBitmap);

toTransform.recycle();

return blurredBitmap;
}

@Override
public String getId() {
return "blur";
}
}

/**
* Created by wjs on 2017/11/20.
*/
public class BlurTransformation extends BitmapTransformation {

private RenderScript rs;
private int radius;

public BlurTransformation(Context context,int radius ) {
super(context);

rs = RenderScript.create(context);
this.radius = radius;
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
Bitmap blurredBitmap = toTransform.copy(Bitmap.Config.ARGB_8888, true);

// Allocate memory for Renderscript to work with
//分配用于渲染脚本的内存
Allocation input = Allocation.createFromBitmap(rs, blurredBitmap, Allocation.MipmapControl.MIPMAP_FULL, Allocation.USAGE_SHARED);
Allocation output = Allocation.createTyped(rs, input.getType());

// Load up an instance of the specific script that we want to use.
//加载我们想要使用的特定脚本的实例。
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setInput(input);

// Set the blur radius
//设置模糊半径
script.setRadius(radius);

// Start the ScriptIntrinisicBlur
//启动ScriptIntrinisicBlur,
script.forEach(output);

// Copy the output to the blurred bitmap
//将输出复制到模糊的位图
output.copyTo(blurredBitmap);

return blurredBitmap;
}

@Override
public void updateDiskCacheKey(MessageDigest messageDigest) {
messageDigest.update("blur transformation".getBytes());
}
}

Glide
.with(MainActivity.this)
.load(“http://image.chaokeli.cn/chocolate/android_20171102104519_0_169.jpg”)
.transform(new BlurTransformation(MainActivity.this,20))
.into(iv2);