Question

I am new to Android development using eclipse, although not new to software development in general.

I would like to use a Java Map to hold string key-value pairs and read and write this map to an editable text file in the application’s default directory. I have been searching all over, found pieces, but have trouble putting it all together.

I think there are basically 2 parts to this task:

1) Create a string, string Map with key-value pairs in my program – okay this is pretty easy.

2) Read and write the Map to an editable text file in the Android application’s default directory. This should be easy, but I have not found a solution anywhere. I would think there would be a map.readAsText function and map.writeAsText function somewhere. I think this is basically what I need.

Can someone help me out – point me in the right direction?
Thank you very much.

Answer 1

The Java Properties class is a serializable Map with a simple, human-editor-friendly format (see the Java Tutorial: Properties. For example:

Properties p = new Properties();
p.put("name", "Charles");
p.put("age", "45");
p.list(System.out); // new FileOutputStream("properties.txt")
// name=Charles
// age=45
p.load(new FileInputStream("properties.txt"));