Blur effect on background

debugcn Published at Dev

user7575308

I need to show something like this in an ImageView

Do you know a method to set an image in an ImageView like so?

Image in background is bluerd and image on it is with blur effect

ImageView imageView=(ImageView)findViewById(R.id.imageView2);
imageView.setImageBitmap(bitmap);

I need put in bitmap my picture and fuzzy picture in background.

this only sets one picture and I need put some fuzzy background

I know how put only one image in 100% quality.
But I don't know how set the background image to this picture.

I don't know how this "filter" name and I could not google for that.

Why the downvotes? I don't know how improve my question.

user7575308

From https://stackoverflow.com/a/36193733:

I recently came across Renderscript API.

//Set the radius of the Blur. Supported range 0 < radius <= 25
private static final float BLUR_RADIUS = 25f;

public Bitmap blur(Bitmap image) {
if (null == image) return null;

Bitmap outputBitmap = Bitmap.createBitmap(image);
final RenderScript renderScript = RenderScript.create(this);
Allocation tmpIn = Allocation.createFromBitmap(renderScript, image);
Allocation tmpOut = Allocation.createFromBitmap(renderScript, outputBitmap);

//Intrinsic Gausian blur filter
ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript));
theIntrinsic.setRadius(BLUR_RADIUS);
theIntrinsic.setInput(tmpIn);
theIntrinsic.forEach(tmpOut);
tmpOut.copyTo(outputBitmap);
return outputBitmap;
}

Use the above code snippet in the image view as shown below.

ImageView imageView = (ImageView) findViewById(R.id.imageView);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.nature);
Bitmap blurredBitmap = blur(bitmap);
imageView.setImageBitmap(blurredBitmap);

Dont forget to add below lines in build.gradle file

renderscriptTargetApi 18
renderscriptSupportModeEnabled true

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edited at2021-07-25

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