BitmapFactory.decodeFile()返回null [英] BitmapFactory.decodeFile() returns null

问题描述

我正在创建一个Android应用，其中您将图像从位置x复制到位置y.复制完成后，我想在ImageView中查看图片. 我知道图像的位置，但是无论如何尝试，都无法创建它的bitmap对象.

I am creating an Android app in which you copy an image from location x to location y. After the copying is complete I would like to see the picture in a ImageView. I know the images location, but no matter what I try I can't create a bitmap object of it.

引起我问题的那一行是:

The line which are causing my problems is this:

BitmapFactory.decodeFile(dir+s);

dir = getCacheDir().getAbsolutePath()+"/images/";

s = file name (eg. 1275123123.jpg)

如果我创建具有相同路径的File对象，并调用f.isFile()，它将返回true.

If I create a File object with the same path, and call f.isFile(), it returns true.

在android或Windows中打开图像都不是问题.

Opening the image in either android or windows are not a problem.

推荐答案

您是否还忘记添加SD卡访问权限READ_EXTERNAL_STORAGE和/或WRITE_EXTERNAL_STORAGE?

Didn't you forget to add SD card access permissions READ_EXTERNAL_STORAGE and/or WRITE_EXTERNAL_STORAGE ?

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