forum

Home / DeveloperSection / Forums / Configure ImageView to display subrect of bitmap in Android

Ask Question

Configure ImageView to display subrect of bitmap in Android

Mark M213307-Nov-2014

Hi Guys

I have a view that contains an ImageView. The ImageView is populated with a png resource, and fills the width and height of the image view.

Instead of this configuration, I would like to display the image zoomed in by an arbitrary percentage, and translated by an arbitrary coordinate. My question is, how can I configure an image view to display a sub-region of it's src bitmap, with arbitrary translation?

I would really appreciate your help.

Thanks

androidimage view 
Updated on 07-Nov-2014
Mark M

Mark M

Follow

Can you answer this question?

Answer

1 Answers

Anonymous User

Anonymous User

07-Nov-2014

You can do this with matrix scaleType

1-Make a ImageView to have matrix scaleType, android:scaleType="matrix"

2-Create and manipulate a Matrix like this,

    Matrix matrix = new Matrix();
    matrix.postTranslate(-10, -10);
    matrix.postScale(2, 2);

    3-set this matrix to ImageView, imageView.setImageMatrix(matrix)

    Liked By