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I have a large image. But i have to display just some portion of it. How is this possible using Android ImageView?
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One way to do it is to set the image you want to display as a background in a container (td, div, span etc) and then adjust background-position to get the sprite you want. Just to clarify, you'd set the width and height of the container td, div, span or whatever to 50px to make this work.
You can use the max-height property to specify the maximum height of the image, and then use overflow: hidden; to hide anything else.
If your image doesn't fit the layout, you can resize it in the HTML. One of the simplest ways to resize an image in the HTML is using the height and width attributes on the img tag. These values specify the height and width of the image element. The values are set in px i.e. CSS pixels.
You could always crop the piece that you need via the Bitmap.createBitmap() static method, and then assign it to the view:
Something like...
// Set some constants
private static final Bitmap SOURCE_BITMAP = BitmapFactory.decodeFile(....); // Get the source Bitmap using your favorite method :-)
private static final int START_X = 10;
private static final int START_Y = 15;
private static final int WIDTH_PX = 100;
private static final int HEIGHT_PX = 100;
// Crop bitmap
Bitmap newBitmap = Bitmap.createBitmap(SOURCE_BITMAP, START_X, START_Y, WIDTH_PX, HEIGHT_PX, null, false);
// Assign new bitmap to ImageView
ImageView image = (ImageView)findViewById(R.id.image_view);
image.setImageBitmap(newBitmap);
Use android:scaleType="centerInside"
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