Android draws part of an image

The canvas class is used to draw images. You can use the canvas class member functions in combination to draw any part of the image as you wish.

Canvas. cliprect: Set the display area
Canvas. drawbitmap: Draw

Example:
Bitmap B = bitmapfactory. decodestream ("Image number", null); // read the image

...

Canvas c = NULL; // instance canvas

C. Save (); // record the original canvas status
C. cliprect (100,100,200,300); // display the area from (100,100) to (200,300) (unit: pixel)

C. drawbitmap (B, 10, 0, null); // draw a castrated image to the position (10, 0)
C. Restore (); // restore the canvas status