Android: GCM Java server keeps shutting down

Question

Can somebody please tell me why this Java server that I'm trying to build which connects to the GCm server to send messages to the reg_id, keeps crashing?

I am very new to building my own client-server classes. And I could easily be missing out something very silly/crucial.

Let me know if more details are needed. Thanks!

package com.example.smittal.gcmserver;

import android.util.Log;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class Server {
public static final String API_KEY = "***";
private static final String TAG = "Server";
private static final String regId = "***";
private static final String msg = "Yeh message hai.";
private static final String title = "Yeh Title hai.";

public static void main(String[] args) {
    HttpURLConnection urlConnection = null;
    BufferedReader reader = null;

    try {
        JSONObject obj = new JSONObject("{\"data\":{\"title\":" + title + ",\"message\":" + msg + "},\"registration_ids\":[" + regId + "]}");

/*      JSONObject jGCMData = new JSONObject();
        JSONObject jData = new JSONObject();
        JSONObject jTitle = new JSONObject();

        jTitle.put("title", msg);
        jData.put("data", jTitle);
        jGCMData.put("registration_ids", regId);

        Log.i(TAG, jGCMData.toString());
*/
        Log.i(TAG, obj.toString());

        URL url = new URL("https://android.googleapis.com/gcm/send");
        urlConnection = (HttpURLConnection) url.openConnection();

        urlConnection.setRequestMethod("POST");
        urlConnection.setRequestProperty("Authorization", "key=" + API_KEY);
        urlConnection.setRequestProperty("Content-Type", "application/json");
        urlConnection.setDoOutput(true);

        OutputStream outputStream = urlConnection.getOutputStream();
        //outputStream.write(jGCMData.toString().getBytes());
        outputStream.write(obj.toString().getBytes());

        InputStream inputStream = urlConnection.getInputStream();
        StringBuffer buffer = new StringBuffer();

        reader = new BufferedReader(new InputStreamReader(inputStream));

        String line;

        while ((line = reader.readLine()) != null) {
            // Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
            // But it does make debugging a *lot* easier if you print out the completed
            // buffer for debugging.
            buffer.append(line + "\n");
        }

        Log.i(TAG, buffer.toString());


    } catch (java.io.IOException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        e.printStackTrace();
    }


}

}

EDIT: This is the error I'm getting.

   08-23 17:29:22.697    5255-5255/? D/AndroidRuntime﹕ >>>>>> START     com.android.internal.os.RuntimeInit uid 0 <<<<<<
   08-23 17:29:22.698    5255-5255/? D/AndroidRuntime﹕ CheckJNI is ON
   08-23 17:29:22.723    5255-5255/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
   08-23 17:29:22.723    5255-5255/? E/android.os.Debug﹕ failed to load memtrack module: -2
   08-23 17:29:22.742    5255-5255/? D/AndroidRuntime﹕ Calling main entry com.android.commands.am.Am
   08-23 17:29:22.743    1219-1369/system_process I/ActivityManager﹕ Force stopping com.example.smittal.gcmserver appid=10066 user=0: from pid 5255
   08-23 17:29:22.749    5255-5255/? D/AndroidRuntime﹕ Shutting down VM
   08-23 17:29:22.749    5255-5258/? I/art﹕ Debugger is no longer active
   08-23 17:29:22.750    5255-5264/? E/art﹕ Thread attaching while runtime is shutting down: Binder_1
   08-23 17:29:22.750    5255-5264/? I/AndroidRuntime﹕ NOTE: attach of thread 'Binder_1' failed

Juan David Vega Rodriguez · Answer 1 · 2015-08-23T09:10:35.577

0

I am not sure what is your error but if you want to check how I used to register device on the GCM Server you can check this code:

https://bitbucket.org/siani/connect2/src/b40d73d80ae308fb14e7fc28fd3331408591b1a4/SimpleLauncher/app/src/main/java/es/juandavidvega/conect2app/launcher/LoginActivity.java?at=master

And you can also check how I use GCM library to send the messages

https://bitbucket.org/siani/connect2/src/b40d73d80ae308fb14e7fc28fd3331408591b1a4/connect2Server/DeviceServer/src/es/juandavidvega/connect2/server/device/sender/DataSenderService.java?at=master

edited Aug 23 '15 at 09:10

answered Aug 23 '15 at 08:54

Juan David Vega Rodriguez

3
3

I have edited my question with my error logs. Is there anything wrong with the way I have written my server? I try to run the server, but it crashes with the above errors. – Somya Aug 23 '15 at 12:04
I have googled it and I found this http://stackoverflow.com/questions/22629568/couldnt-load-memtrack-module-logcat-error apparently could be related with you emulator or device or something similar, follow the link instructions – Juan David Vega Rodriguez Aug 23 '15 at 12:25

Android: GCM Java server keeps shutting down

1 Answers1