Android how to create runtime thumbnail

Question

I have a large sized image. At runtime, I want to read the image from storage and scale it so that its weight and size gets reduced and I can use it as a thumbnail. When a u

Answer 1

Use BitmapFactory.decodeFile(...) to get your Bitmap object and set it to an ImageView with ImageView.setImageBitmap().

On the ImageView set the layout dimensions to something small, eg:

android:layout_width="66dip" android:layout_height="48dip"

Add an onClickListener to the ImageView and launch a new activity, where you display the image in full size with

android:layout_width="wrap_content" android:layout_height="wrap_content"

or specify some larger size.