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Configure ImageView to display subrect of bitmap in Android

Mark M219607-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

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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)

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