CODEWITHSUNDEEP
androidimagebitmapscreenimageview
yosh
yosh

Reputation: 3305

Android: how to convert whole ImageView to Bitmap?

I have my application that is displaying images with different ratio, resized inside (centerInside) imageView. What I need is to create bitmap from the ImageView including the background (black in this case).

So for example I have device screen 320x480, full screen imageView with image resized to 280x480. How could I get 320x480 bitmap from it?

On top of this imageview I have some logos or buttons that I don't want to include to bitmap, they're like on top layer. All I need is bitmap with image and black border from some sides.

Upvotes: 44

Views: 131623

Answers (8)

Rumit Patel
Rumit Patel

Reputation: 12469

As buildDrawingCache() is deprecated, From this SO answer, we need to get bitmap directly from any android View.

Example:

fun getBitmapFromView(view: View): Bitmap {
    val bitmap = Bitmap.createBitmap(
        view.width, view.height, Bitmap.Config.ARGB_8888
    )
    val canvas = Canvas(bitmap)
    view.draw(canvas)
    return bitmap
}

fun getBitmapFromView(view: View, defaultColor: Int): Bitmap {
    val bitmap = Bitmap.createBitmap(
        view.width, view.height, Bitmap.Config.ARGB_8888
    )
    val canvas = Canvas(bitmap)
    canvas.drawColor(defaultColor)
    view.draw(canvas)
    return bitmap
}

Use like this way:

//@param rootView is View object which you want to get bitmap
Bitmap bitmap = getBitmapFromView(rootView);
Bitmap bitmapColored = getBitmapFromView(rootView, Color.WHITE);

Upvotes: 1

Ahmet B.
Ahmet B.

Reputation: 1674

In Kotlin;

imageView.drawable?.let {
        val mBitmap = (it as BitmapDrawable).bitmap
    }

Upvotes: 0

Arshia Ghodsi
Arshia Ghodsi

Reputation: 1

It works in Kotlin after buildDrawingCache() being deprecated

 // convert imageView to bitmap
val bitmap = (imageViewId.getDrawable() as BitmapDrawable).getBitmap()

Upvotes: 0

Adil Raza Bangash
Adil Raza Bangash

Reputation: 295

This is a working code

imageView.setDrawingCacheEnabled(true);
imageView.buildDrawingCache();
Bitmap bitmap = Bitmap.createBitmap(imageView.getDrawingCache());

Upvotes: 2

Mansh Sharma
Mansh Sharma

Reputation: 21

try {
        photo.setImageURI(Uri.parse("Location");
        BitmapDrawable drawable = (BitmapDrawable) photo.getDrawable();
        Bitmap bitmap = drawable.getBitmap();
        bitmap = Bitmap.createScaledBitmap(bitmap, 70, 70, true);
        photo.setImageBitmap(bitmap);

    } catch (Exception e) {

    }

Upvotes: 2

Greg Giacovelli
Greg Giacovelli

Reputation: 10184

You could just use the imageView's image cache. It will render the entire view as it is layed out (scaled,bordered with a background etc) to a new bitmap.

just make sure it built.

imageView.buildDrawingCache();
Bitmap bmap = imageView.getDrawingCache();

there's your bitmap as the screen saw it.

Upvotes: 98

Kevin Coppock
Kevin Coppock

Reputation: 134664

Just thinking out loud here (with admittedly little expertise working with graphics in Java) maybe something like this would work?:

ImageView iv = (ImageView)findViewById(R.id.imageview);
Bitmap bitmap = Bitmap.createBitmap(iv.getWidth(), iv.getHeight(), Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
iv.draw(canvas);

Out of curiosity, what are you trying to accomplish? There may be a better way to achieve your goal than what you have in mind.

Upvotes: 4

Cristian
Cristian

Reputation: 200090

Have you tried:

BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
Bitmap bitmap = drawable.getBitmap();

Upvotes: 79

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