为什么ByteArrayOutputStream有时让我空指针异常？ [英] Why ByteArrayOutputStream sometimes gives me null pointer exception?

问题描述

当加载图片到字节[]在智能手机应用有时ByteArrayOutputStream给我的NullPointerException任何解释？

 位图BM = BitmapFactory.de codeFILE（路径）;
的System.out.println（！位图+ BM = NULL）;
ByteArrayOutputStream缓冲区=新ByteArrayOutputStream（）;
bm.com preSS（比较pressFormat.JPEG，100，缓冲）;
 

解决方案

您确定这是ByteArrayOutputStream这是给你的NullPointerException异常？

抑或是在bm.com preSS发生了什么？ BM可以为null - 很可能是由于你在一个无效的路径传递

When loading a picture into byte[] in smartphone app sometimes ByteArrayOutputStream gives me nullpointerexception any explanation?

Bitmap bm = BitmapFactory.decodeFile(path);
System.out.println("BITMAP: "+bm != null);
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
bm.compress(CompressFormat.JPEG, 100, buffer);

解决方案

Are you sure it's ByteArrayOutputStream that's giving you the NullPointerException?

Or is it happening at bm.compress? bm can be null - likely due to you passing in an invalid path.

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