How to blur imageview in android

I have an imageview and i set Image Resources programmatically like this:

int resourceId = getResources().getIdentifier("imagename", "drawable", "mypackage");
imgLock.setImageResource(resourceId);

Is there any easy way to show my ImageView with blurry image?

Solution 1:

You can use glide transformations https://github.com/wasabeef/glide-transformations you can blur the image with one line of code

Glide.with(this).load(R.drawable.demo)
    .bitmapTransform(new BlurTransformation(context))
    .into((ImageView) findViewById(R.id.image));

Solution 2:

import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;

Bitmap blurred = blurRenderScript(this,yourBitmap, 25);
//second parametre is radius
yourImageView.setImageBitmap(blurred); 

@SuppressLint("NewApi")
public static Bitmap blurRenderScript(Context context,Bitmap smallBitmap, int radius) {
try {
        smallBitmap = RGB565toARGB888(smallBitmap);
    } catch (Exception e) {
        e.printStackTrace();
    }

    Bitmap bitmap = Bitmap.createBitmap(
            smallBitmap.getWidth(), smallBitmap.getHeight(),
            Bitmap.Config.ARGB_8888);

    RenderScript renderScript = RenderScript.create(context);

    Allocation blurInput = Allocation.createFromBitmap(renderScript, smallBitmap);
    Allocation blurOutput = Allocation.createFromBitmap(renderScript, bitmap);

    ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(renderScript,
            Element.U8_4(renderScript));
    blur.setInput(blurInput);
    blur.setRadius(radius); // radius must be 0 < r <= 25
    blur.forEach(blurOutput);

    blurOutput.copyTo(bitmap);
    renderScript.destroy();

    return bitmap;
}

private static Bitmap RGB565toARGB888(Bitmap img) throws Exception {
    int numPixels = img.getWidth() * img.getHeight();
    int[] pixels = new int[numPixels];

    //Get JPEG pixels.  Each int is the color values for one pixel.
    img.getPixels(pixels, 0, img.getWidth(), 0, 0, img.getWidth(), img.getHeight());

    //Create a Bitmap of the appropriate format.
    Bitmap result = Bitmap.createBitmap(img.getWidth(), img.getHeight(), Bitmap.Config.ARGB_8888);

    //Set RGB pixels.
    result.setPixels(pixels, 0, result.getWidth(), 0, 0, result.getWidth(), result.getHeight());
    return result;
}

Solution 3:

There are many libraries are available you can use any of these. I prefer Blurry library for it. it is very simple and optimized.

dependency:

 dependencies {
    compile 'jp.wasabeef:blurry:4.x.x'
}

Functions

Blurry.with(context).radius(25).sampling(2).onto(rootView)
// from View Blurry.with(context).capture(view).into(imageView)
// from Bitmap Blurry.with(context).from(bitmap).into(imageView)

Blur Options

Radius
Down Sampling
Color Filter
Asynchronous Support
Animation (Overlay Only)

Blurry.with(context)
  .radius(10)
  .sampling(8)
  .color(Color.argb(66, 255, 255, 0))
  .async()
  .animate(500)
  .onto(rootView);

Get a bitmap directly

// Sync
val bitmap = Blurry.with(this)
  .radius(10)
  .sampling(8)
  .capture(findViewById(R.id.right_bottom)).get()
imageView.setImageDrawable(BitmapDrawable(resources, bitmap))

// Async
Blurry.with(this)
  .radius(25)
  .sampling(4)
  .color(Color.argb(66, 255, 255, 0))
  .capture(findViewById(R.id.left_bottom))
  .getAsync {
    imageView.setImageDrawable(BitmapDrawable(resources, it))
  }

Solution 4:

private Bitmap CreateBlurredImage (int radius)
{
   // Load a clean bitmap and work from that
    Bitmap originalBitmap=
    BitmapFactory.DecodeResource(Resources,Resource.Drawable.dog_and_monkeys);

// Create another bitmap that will hold the results of the filter.
Bitmap blurredBitmap;
blurredBitmap = Bitmap.CreateBitmap (originalBitmap);

// Create the Renderscript instance that will do the work.
RenderScript rs = RenderScript.Create (this);

// Allocate memory for Renderscript to work with
Allocation input = Allocation.CreateFromBitmap (rs, originalBitmap, Allocation.MipmapControl.MipmapFull, AllocationUsage.Script);
Allocation output = Allocation.CreateTyped (rs, input.Type);

// Load up an instance of the specific script that we want to use.
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.Create (rs, Element.U8_4 (rs));
script.SetInput (input);

// Set the blur radius
script.SetRadius (radius);

// Start the ScriptIntrinisicBlur
script.ForEach (output);

// Copy the output to the blurred bitmap
output.CopyTo (blurredBitmap);

return blurredBitmap;

}

protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);

SetContentView (Resource.Layout.Main);
_imageView = FindViewById<ImageView> (Resource.Id.originalImageView);

_seekbar = FindViewById<SeekBar> (Resource.Id.seekBar1);
_seekbar.StopTrackingTouch += BlurImageHandler;

}

private void BlurImageHandler (object sender, SeekBar.StopTrackingTouchEventArgs e)
{
int radius = e.SeekBar.Progress;
if (radius == 0) {
    // We don't want to blur, so just load the un-altered image.
    _imageView.SetImageResource (Resource.Drawable.dog_and_monkeys);
} else {
    DisplayBlurredImage (radius);
}

}

private void DisplayBlurredImage (int radius)
{
_seekbar.StopTrackingTouch -= BlurImageHandler;
_seekbar.Enabled = false;

ShowIndeterminateProgressDialog ();

Task.Factory.StartNew (() => {
    Bitmap bmp = CreateBlurredImage (radius);
    return bmp;
})
.ContinueWith (task => {
    Bitmap bmp = task.Result;
    _imageView.SetImageBitmap (bmp);
    _seekbar.StopTrackingTouch += BlurImageHandler;
    _seekbar.Enabled = true;
    DismissIndeterminateProgressDialog ();
}, TaskScheduler.FromCurrentSynchronizationContext ());

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">
    <SeekBar
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:id="@+id/seekBar1"
            android:max="25" />
    <ImageView
            android:src="@drawable/dog_and_monkeys"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/originalImageView" />
</LinearLayout>

click here deatiled code example

Solution 5:

Just simply use this library https://github.com/ChathuraHettiarachchi/BlurIM , I was having problem with BlurTransformation class had errors thats why couldn't use Glide transformation but this works fine.

BlurImage.withContext(this)
     .blurFromResource(R.drawable.YOUR_RESOURCE)
     .into(imageView);