How to find out json response is an empty JSON object in android?

Question

I'm facing the problem that I get an empty JSON Object from the server.

How can I find out that JSON response from the server is an empty JSON Object {} or others ? I set jObject!=null condition for it but it doesn't work.

Here is my code:

JSONObject jObject = new JSONObject(response);

if (jObject!=null) {
    Toast.makeText(getApplicationContext(), R.string.successfull_unsubscribe, Toast.LENGTH_LONG).show();
    ShareData.saveData(getApplicationContext(), "simType", "null");
    ShareData.saveData(getApplicationContext(), "firstLaunch", "true");

    startActivity(new Intent(MainActivity2.this, WelcomeActivity.class));
    finish();
}

Answer 1

Replace your if condition with if(.jObject.keys().hasNext())

Answer 2

You can try jObject.isNull("") in your if condition

IsNull( ) method (JsonObject):

Returns a LOGICAL indicating if a property in a JsonObject contains the null value.

Answer 3

You can use jObject.keys().hasNext() or jObject.length() != 0 :

JSONObject jObject = new JSONObject(response);
if (jObject != null && jObject.length() != 0) {
    Toast.makeText(getApplicationContext(), R.string.successfull_unsubscribe, Toast.LENGTH_LONG).show();
    ShareData.saveData(getApplicationContext(), "simType", "null");
    ShareData.saveData(getApplicationContext(), "firstLaunch", "true");

    startActivity(new Intent(MainActivity2.this, WelcomeActivity.class));
    finish();
}

Answer 4

You can try length check or toString.

eg: jObject.length() == 0

eg: jObject.toString().equals("{}")