Set The Background Image In Blur Effect In Android App

Im trying to get my background image on the list view blurred, but I tried following the tutorials and it does not work. Anyone please advise, thanks. main activity.java public cl

Solution 1:

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

Reference : http://javatechig.com/android/how-to-create-bitmap-blur-effect-in-android-using-renderscript