Creating a JSON file from a url - json

Question

Hi guys I have a problem creating a JSON file from a google url that i have. This is my code that im using.
import android.util.Log;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class DownloadUrl {
public String readUrl(String strUrl) throws IOException, InterruptedException {
Log.d("URLS = ",strUrl);
Thread.sleep(2000);
String data = "";
InputStream iStream = null;
HttpURLConnection urlConnection = null;
try {
URL url = new URL(strUrl);
// Creating an http connection to communicate with url
urlConnection = (HttpURLConnection) url.openConnection();
// Connecting to url
urlConnection.connect();
// Reading data from url
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
sb.append(line);
}
data = sb.toString();
Log.d("downloadUrl", data.toString());
br.close();
} catch (Exception e) {
Log.d("Exception", e.toString());
} finally {
iStream.close();
urlConnection.disconnect();
}
return data;
}
}
It works fine when i throw a url that looks like this into it.
https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=40.7207523,-73.383851&radius=4828&type=bar&key=MYKEY
But when i try and throw a url that looks like this into it.
https://maps.googleapis.com/maps/api/place/details/json?placeid=ChIJe3AmoGsr6IkRuWcK1LAh-DE&key=MYKEY
I get an error: D/GooglePlacesReadTask: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.InputStream.close()' on a null object reference
I dont know how i fix this. Any help?

Answer 1

Aah
you did not mention this is in android,
I presume this because you said ,
android.os.NetworkOnMainThreadException
in your comment
Android does not allow time consuming tasks on main thread,
use AsyncTask to call your function or use plain old java thread

Answer 2

Network on main thread exception comes when you run a networking operation on main thread .
Generally AsyncTask is used for these works but if you want to use the same code you written Just add..
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);