Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Guide de dépannage télécharger pdf (Page 45)

Using graphics and multimedia

Using images

Use raw images

Using images

Drawing and rendering images

Using audio

Using rich media

Task Steps

Allow applications to

use raw image data.

> To retrieve raw image data from a specified region of a bitmap and store the data in an integer array, invoke

Bitmap.getARGB().

void getARGB(int[] argbData, int offset, int scanLength, int x, int y, int width,

int height);

Retrieve image data. 1. Initialize an integer array.

Bitmap original = Bitmap.getPredefinedBitmap(Bitmap.INFORMATION);

int[] argb = new int[original.getWidth() * original.getHeight()];

2. To store the raw image data of the new or predefined bitmap in the integer array, invoke Bitmap.getARGB().

original.getARGB(argb, 0, original.getWidth(), 0, 0, original.getWidth(),

original.getHeight());

Compare two images to

see if they are identical.

>Invoke Bitmap.equals().

if(restored.equals(original)) {

System.out.println("Success! Bitmap renders correctly with RGB data.");

} else if(!restored.equals(original)) {

System.out.println("Bitmap rendered incorrectly with RGB data.");

}

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Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Guide de dépannage Page 45