Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 47)

2: Using graphics and multimedia

Code sample: Using a raw image to recreate an encoded image

Example: ImageDemo.java

/**

* ImageDemo.java

package com.rim.samples.docs.imagedemo;

import net.rim.device.api.ui.*;

import net.rim.device.api.ui.component.*;

import net.rim.device.api.ui.container.*;

import net.rim.device.api.system.*;

import java.io.*;

/* The ImageDemo.java sample retrieves raw data from an image that

is included in its project, and then uses that raw data to

recreate an EncodedImage. */

public class ImageDemo extends UiApplication {

public static void main(String[] args) {

ImageDemo app = new ImageDemo();

app.enterEventDispatcher();

}

public ImageDemo() {

pushScreen(new ImageDemoScreen());

}

final class ImageDemoScreen extends MainScreen {

private static final int IMAGE_SIZE = 2430;

private InputStream input;

private byte[] data = new byte[IMAGE_SIZE];

public ImageDemoScreen() {

super();

setTitle(new LabelField(“Image Demo Sample”));

try {

input =

Class.forName(“com.rim.samples.docs.imagedemo.ImageDemo”).getResourceAsStream(“/images/

hellokitty.png”);

} catch (ClassNotFoundException e) {

System.out.println(“Class not found”);

}

if(input == null) {

System.out.println(“Error: input stream is not initialized.”);

} else if (input != null) {

System.out.println(“OK: input stream is initialized.”);

try {

int code = input.read(data);

System.out.println(“Total number of bytes read into buffer: “ + code + “

.”);

} catch (IOException e) {

// Handle exception.

}

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