blackberry - 如何使用 Bitmap.getBitmapResource() 访问存储在黑莓中的图像？

Question

我想访问存储在 Blackberry 中的图像，比如位于“store/home/user/image.png”位置。

现在我可以访问这张图片吗，

String filePath = "file:///store/home/user/image.png;
Bitmap image = Bitmap.getBitmapResource(filePath);
BitmapField bitmapField = new BitmapField(image, BitmapField.FOCUSABLE);

或

我必须访问它，

  String filePath = "file:///store/home/user/image.png;
  FileConnection fconn = (FileConnection)Connector.open(filePath, Connector.READ); 
  if (fconn.exists()) 
  {
                ........
                ........                           

     input.close();
     fconn.close();                            

  }

我可以使用第二种方式访问​​图像，但我想知道我可以使用“Bitmap.getBitmapResource(filePath)”访问它吗？

Answer 1

看看Bitmap.getBitmapResource API 引用:

public static Bitmap getBitmapResource(String name)
Creates a bitmap from provided name resource.
This method looks for the resource in the cod file that launched this process.
Parameters:
name - Name of the bitmap resource.
Returns:
New Bitmap object, or null if this method couldn't find your named resource.
Throws:
NullPointerException - If the name parameter is null.
Since:
JDE 3.6

public static Bitmap getBitmapResource(String module, String name)
Creates a bitmap from provided named resource found in module.
Parameters:
module - Name of the module containing the bitmap resource. If not specified, the name of >the calling module is used.
name - Name of the bitmap resource.
Returns:
New Bitmap object, or null if this method couldn't find your named resource.
Throws:
NullPointerException - If the name parameter is null.
Since:
JDE 3.6

此方法用于检索资源代码模块。如果您在项目中包含一些图像，您将能够使用此方法检索它。

如果你想从文件系统中打开一些图像，你将不得不使用 FileConnection，检查文件 MIME 类型，从流中读取它的字节并相应地创建 EncodedImage。