How to read text file from Internal Storage in Android

SomeClass.java

String filePath = "/data/data/com.example.vadym.test1/filename.txt";
        String all = "";
        try {
            BufferedReader br = new BufferedReader(new FileReader(filePath));
            String strLine;
            while ((strLine = br.readLine()) != null){
                all = all + strLine;
            }
            Log.d(Utils.TAG, all);
        } catch (IOException e) {
            Log.e("notes_err", e.getLocalizedMessage());
        }