read file from external storage

问题

I simply cannot find how to get one specified file from the external storage. I know that with getExternalStoragePublicDirectory(), you get the external storage directory but I can't get further. I need some kind of method where you have to give the name of the file and it returns the file. Thanx

回答1:

Better than using File.separator is this, which is standard Java:

final File file = new File(Environment.getExternalStorageDirectory()
                          .getAbsolutePath(), filename);

回答2:

You can just do this:

File f = new File(Environment.getExternalStorageDirectory()
                            .getAbsolutePath() + File.separator + fileName);

回答3:

Better still:

final File file = new File(Environment.getExternalStorageDirectory(), filename);

回答4:

I also use getExternalStoragePublicDirectory() and everything goes well. My filename is "DE Disimpan"

File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
File filepath = new File(file,"DE Disimpan");

来源：https://stackoverflow.com/questions/8370665/read-file-from-external-storage