圖像創作的MIDlet

Question

失敗，我試圖做一個相關圖片如下： -

try 
    { 
     strom = Image.createImage("stromB.png"); 
     map0 = Image.createImage("map0.png"); 
    } 
    catch (Exception e) 
    { 
     System.out.println("image creatino faild"); 
     System.out.println(e.getMessage()); 
    } 

strom工作正常，但map0總是拋出異常。我的猜測是尺寸更大，可能是這個原因。

• 如何在midlet中使用較大的png圖像？
• midlet是否有任何限制？
• 我可以用於midlet的最大尺寸是多少？

Answer 1

map0拋出異常可以根據屏幕大小

/** 
    * This methog resizes an image by resampling its pixels 
    * @param src The image to be resized 
    * @return The resized image 
    */ 

    private Image resizeImage(Image src) { 
     int srcWidth = src.getWidth(); 
     int srcHeight = src.getHeight(); 
     Image tmp = Image.createImage(screenWidth, srcHeight); 
     Graphics g = tmp.getGraphics(); 
     int ratio = (srcWidth << 16)/screenWidth; 
     int pos = ratio/2; 

     //Horizontal Resize   

     for (int x = 0; x < screenWidth; x++) { 
      g.setClip(x, 0, 1, srcHeight); 
      g.drawImage(src, x - (pos >> 16), 0, Graphics.LEFT | Graphics.TOP); 
      pos += ratio; 
     } 

     Image resizedImage = Image.createImage(screenWidth, screenHeight); 
     g = resizedImage.getGraphics(); 
     ratio = (srcHeight << 16)/screenHeight; 
     pos = ratio/2;   

     //Vertical resize 

     for (int y = 0; y < screenHeight; y++) { 
      g.setClip(0, y, screenWidth, 1); 
      g.drawImage(tmp, 0, y - (pos >> 16), Graphics.LEFT | Graphics.TOP); 
      pos += ratio; 
     } 
     return resizedImage; 

    }//resize image