onActivityResult()Uri到Byte数组

问题描述：

我想从Android Uri(由 onActivityResult)转换为简单的字节数组，以便将文件上传为多部分邮件的一部分.任何人都可以提供有关如何从Uri到byte []数组?

I want to get from an Android Uri (of the kind returned by onActivityResult) to a simple byte array, in order to upload a file as part of a multipart message. Can anyone provide an example of how to get from a Uri to a byte[] array?

我的意思是android.net.Uri Uri

答

将一些SO示例和google组代码放在一起后，我可以通过以下代码来实现它:

After putting together some SO examples and google group codes, i'm able to acheive it by this code:

Uri data = result.getData();   
ByteArrayOutputStream baos = new ByteArrayOutputStream();  
FileInputStream fis;  
try {  
    fis = new FileInputStream(new File(data.getPath()));  
    byte[] buf = new byte[1024];  
    int n;  
    while (-1 != (n = fis.read(buf)))  
        baos.write(buf, 0, n);  
} catch (Exception e) {  
    e.printStackTrace();  
}  
byte[] bbytes = baos.toByteArray();

onActivityResult()Uri到Byte数组

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