The following code example shows how to downscale images by file size.
package com.nokia.evo.java.test.imagescale;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import com.nokia.mid.imagescale.ImageScaler;
import com.nokia.mid.imagescale.ImageScalerException;
import com.nokia.mid.imagescale.ImageScalerListener;
public class ImageScalingFileSizeExample extends MIDlet implements ImageScalerListener{
private String srcFile = "file:///MemoryCard/big.jpg";
private String destFile = "file:///MemoryCard/small.jpg";
private int jpegQuality = 0;
Form form = new Form("ImageScaling Example");
private int maxFileSize = 100; //Unit: K
public ImageScalingFileSizeExample() {
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
}
protected void pauseApp() {
}
protected void startApp() throws MIDletStateChangeException {
Display.getDisplay(this).setCurrent(form);
ImageScaler is = new ImageScaler(srcFile, destFile);
is.addListener(this);
if (jpegQuality != 0)
{
is.setJpegQuality(jpegQuality);
}
int result = -1;
try {
result = is.scaleImage(maxFileSize);
} catch (ImageScalerException e) {
}
if (result <= 0){
Ticker ticker = new Ticker("Scale image " + srcFile + " fail!");
form.setTicker(ticker);
}
}
public void scaleFinished(int requestId, int result){
if (result == 0){
Ticker ticker = new Ticker("[" + requestId + "]: Scale OK!");
form.setTicker(ticker);
}else{
Ticker ticker = new Ticker("[" + requestId + "]: Scale Fail! result=[" + result + "]");
form.setTicker(ticker);
}
}
}