How to extract JSONObject easily from any “file.txt” or “file.json” ? [assume the file is already in the system]

Question

Suppose I have "file.txt" or "file.json" in my android asset folder. How can I make a JSONObject from the file?

I need something like this finally : JSONObject json = new JSONObject(jsontxt);

I have browsed a lot of stackoverflow questions , didn't find answer

Answer 1

You need to obtain the file content first.
You might want to use a FileReader for that.

new BufferedReader(new FileReader("path-to-file"));

Or if the file is in your classpath

final InputStream inputStream = 
           ClassLoader.getSystemClassLoader()
                      .getResourceAsStream("path-to-file");
new BufferedReader(new InputStreamReader(inputStream , "UTF-8"));

Then you can use the composed String to construct a new JSONObject .

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To obtain an InputStream for your File, which is an asset, you can leverate the AssetManager . Pseudocode

InputStream is = AssetManager#open(fileName)