Используйте это:
int oolddWidth;
int oolddHeight;
int ddispplayWidth;
int ddispplayHeight;
EncodedImage eih1 = EncodedImage.getEncodedImageResource("add2.png");
oolddWidth = eih1.getWidth();
oolddHeight = eih1.getHeight();
ddispplayWidth = Display.getWidth()-40;
ddispplayHeight = 80;
int nnumeerator = net.rim.device.api.math.Fixed32.toFP(oolddWidth);
int ddenoominator = net.rim.device.api.math.Fixed32.toFP(ddispplayWidth);
int wwidtthScale = net.rim.device.api.math.Fixed32.div(nnumeerator, ddenoominator);
nnumeerator = net.rim.device.api.math.Fixed32.toFP(oolddHeight);
ddenoominator = net.rim.device.api.math.Fixed32.toFP(ddispplayHeight);
int hheighhtScale = net.rim.device.api.math.Fixed32.div(nnumeerator, ddenoominator);
EncodedImage newEih1 = eih1.scaleImage32(wwidtthScale, hheighhtScale);
final Bitmap header1 = newEih1.getBitmap();