Android How can I read json file(text file) from SD Card and display data into textview [duplicate]

Question

I have the following textfile into my SdCard.now i want to parse this file via Json parser,and i want to parse and read this file and display data into my textview,how i can do this?

{
"data": [
    {
        "id": "1",
        "title": "Farhan Shah",
        "duration": 10,
    },
    {
        "id": "2",
        "title": "Noman Shah",
        "duration": 10,
    },
    {
        "id": "3",
        "title": "Ahmad Shah",
        "duration": 10,
    },
    {
        "id": "4",
        "title": "Mohsin Shah",
        "duration": 10,
    },
    {
        "id": "5",
        "title": "Haris Shah",
        "duration": 10,
    }
  ]

}

This is the code:

File sdcard = Environment.getExternalStorageDirectory();

    //Get the text file

    File file = new File(sdcard,"textarabics.txt");

    String UTF8 = "utf8";
    int BUFFER_SIZE = 8192;


    //Read text from file
    StringBuilder text = new StringBuilder();

i get the file,but now i have no idea that how i can parse the data?

Answer 1

get the file contents like this:

File yourFile = new File("/mnt/extSdCard/test.json");
        FileInputStream stream = new FileInputStream(yourFile);
        String jString = null;
        try {
            FileChannel fc = stream.getChannel();
            MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
            /* Instead of using default, pass in a decoder. */
            jString = Charset.defaultCharset().decode(bb).toString();
          }
          finally {
            stream.close();
          }

parse and add to listview:

String[] from = new String[] {"title"};
int[] to = new int[] { R.id.name};
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();

try 
{
    JSONArray names = new JSONArray(jsonString);
    Log.i("MyList","Number of names " + names.length());
    for (int j = 0; j < names.length(); j++) 
    {
         JSONObject jsonObject = names.getJSONObject(j);
         HashMap<String, String> map = new HashMap<String, String>();
         map.put("title", jsonObject.getString("title"));
         fillMaps.add(map);
    }
} 
catch (Exception e) 
{
    e.printStackTrace();
}

SimpleAdapter adapter = new SimpleAdapter(context, fillMaps, R.layout.result, from, to);
mListView.setAdapter(adapter);

Here mListView is your predefined ListView.