j2me中放大和缩小图片的方法

/*************************************************************************** * http://blog.csdn.net/the3gwireless * 放大图片的方法 */public static Image zoomInImage(Image img)
{ int[] rgbOutput = null; int width = 0, height = 0; int[] rgbInput = null; try { width = img.getWidth(); height = img.getHeight(); rgbInput = new int[width * height]; rgbOutput = new int[(width << 1) * (height << 1)]; img.getRGB(rgbInput, 0, width, 0, 0,
width, height); int i, j, k; k = 0; for (i = 0; i < (height << 1); i += 2) { for (j = 0; j < (width << 1); j += 2) { if (j < 3) { // System.out.println(i * (width << 1) + j); // System.out.println((i + 1) * (width << 1) + j); // System.out.println(i * (width
<< 1) + j + 1); // System.out.println((i + 1) * (width << 1) + j + 1); } rgbOutput[i * (width << 1) + j] = rgbInput[k]; rgbOutput[(i + 1) * (width << 1) + j] = rgbInput[k]; rgbOutput[i * (width << 1) + j + 1] = rgbInput[k]; rgbOutput[(i + 1) * (width << 1)
+ j + 1] = rgbInput[k]; k++; } } return Image.createRGBImage(rgbOutput,
width << 1, height << 1, true); } catch (OutOfMemoryError e)
{ // e.printStackTrace(); ImageAlbum.showAlert("图像尺寸太大,不能完成此操作."); return img; } finally { rgbOutput = null; rgbInput = null; } } /*************************************************************************** * 缩小图片的方法 */public static Image zoomOutImage(Image img)
{ int[] rgbOutput = null; int width = 0, height = 0; int[] rgbInput = null; try { width = img.getWidth(); height = img.getHeight(); // System.out.println(width >> 1); // System.out.println(height >> 1); rgbInput = new int[width * height]; rgbOutput = new
int[(width >> 1) * (height >> 1)]; img.getRGB(rgbInput, 0, width, 0, 0, width, height); int i, j, k, k1; k = 0; k1 = 0; // System.out.println(height); // System.out.println(width); for (i = 0; i < height; i++) { for (j = 0; j < width; j += 2) { if (i % 2 ==
0) { if (k1 > width * height - 1 || k > (width >> 1) * (height >> 1) - 1) { // System.out.println("k=" + k); // System.out.println("k1=" + k1); break; } rgbOutput[k] = rgbInput[k1]; k++; k1 += 2; // System.out.println(k); // System.out.println(k1); } else
{ k1 += 2; } } } return Image.createRGBImage(rgbOutput,
width >> 1, height >> 1, true); } catch (OutOfMemoryError e)
{ // e.printStackTrace(); ImageAlbum.showAlert("图像尺寸太大,不能完成此操作."); return img; } finally { rgbOutput = null; rgbInput = null; } }