getting issue in json parsing - php

Question

i have to download a demo apk. I am inserting some values in database using php. but at some point of time it is throwing an error
org.json.JSONException: Value at validity_days of type java.lang.String cannot be converted to int
the code snippet in java:
private void upgradeVersion(String apkPath) {
System.out.println("SDCARD path checked5:-"+apkPath);
if(saveUserInfo()==true)
{
System.out.println("validity...."+validity);
if (apkPath != null) {
progressDialog.dismiss();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(apkPath)),
"application/vnd.android.package-archive");
intent.putExtra("validity_days", validity);
startActivityForResult(intent, 1);
Toast.makeText(getApplicationContext(),"NetVidya ebook app has been successfully installed.", Toast.LENGTH_LONG).show();
}
}
and the php response:
{"users":[{"status":"added","installeddate":"","active":"Y","validity_days":""}]}
which im getting null here thats y throwing error.
is it possible to handle that exception in android itself? or i have to make some changes in php.
please suggest

Answer 1

Without seeing your JSON parser I'm assuing the issue is becuase you need to use validity_days and that string, at least some of the time, may have no value.
try{
JSONObject fullString = new JSONObject(thatLongStringYouPosted);
JSONArray users = fullString.getJSONObject("users");
String validity_days = users.getJSONObject(0),getString("validity_days");
if(!validity_days.isEmpty() && validity_days != null)
//do whatever you want with it
}
} catch (JSONException e){
Log.e(TAG, e.toString());
}
When parsing JSON you will get back a null value only if what you are looking for does not exist - i.e. there is no "validity_days" string in the response. Otherwise you will just get an empty string. Simply checking for the null and/or the empty string should fix your problem.
Also the try catch block will handle this excpetion within the android code. You can modify your PHP if you want to ensure you always get back a specific value if empty (e.g. you may want to always reuturn a 0 instead of nothing when a field is blank).

Answer 2

According to the Exception you placed above, I think you are getting Exception at this line:
startActivityForResult(intent, 1);
Just replace this line with
startActivity(intent);
and get JSONString in other activity as
Intent i = getIntent();
String str = i.getStringExtra("validity_days");

Answer 3

Why don't you parse your variable validity_days to integer before it throws exception..