在Android自定义Rom中创建文件夹

Question

I'm building an Android custom ROM with an additional logging mechanism for a research project. My customized Android source code contains file logging via PrintWriter(filename) . So far it works fine, but now I want to be able to grab its output from a concurrently developed App.

The problem is: When the PrintWriter creates the a new log file, it is created with rw------- permission and so I'm not able to read the file from my App. What would be the best way to make that work?

Answer 1

I found the solution by myself. It works with the java methods of the File class, but you have to invoke these after actually creating the file, which is in my opinion not straightforward, because I expected it to work like setting some attributes and then actually creating the file with these specified attributes. Here is an example of setting Read/Write/Execute permissions for everyone for a specific file:

File file = new File("logs/log.txt");
file.createNewFile();
file.setWritable(true, false);
file.setReadable(true, false);
file.setExecutable(true, false);
PrintWriter writer = new PrintWriter(file);