New GCM API Register Unknown Source Error
Solution 1
That's the error you are getting :
java.io.IOException: MAIN_THREAD
It means you are calling the register method from the main thread, which is not allowed. You should call it from another thread.
public static final String ERROR_MAIN_THREAD
GCM methods are blocking. You should not run them in the main thread or in broadcast receivers. Constant Value: "MAIN_THREAD"
Here's a code sample from the GCM documentation :
/**
* Registers the application with GCM servers asynchronously.
* <p>
* Stores the registration id, app versionCode, and expiration time in the
* application's shared preferences.
*/
private void registerBackground() {
new AsyncTask() {
@Override
protected String doInBackground(Void... params) {
String msg = "";
try {
if (gcm == null) {
gcm = GoogleCloudMessaging.getInstance(context);
}
regid = gcm.register(SENDER_ID);
msg = "Device registered, registration id=" + regid;
// You should send the registration ID to your server over HTTP,
// so it can use GCM/HTTP or CCS to send messages to your app.
// For this demo: we don't need to send it because the device
// will send upstream messages to a server that echo back the message
// using the 'from' address in the message.
// Save the regid - no need to register again.
setRegistrationId(context, regid);
} catch (IOException ex) {
msg = "Error :" + ex.getMessage();
}
return msg;
}
@Override
protected void onPostExecute(String msg) {
mDisplay.append(msg + "\n");
}
}.execute(null, null, null);
}
Solution 2
1.Just create the GCMHelper class to get the CGM ID.
public final class GCMHelper {
static GoogleCloudMessaging gcm = null;
static Context context= null;
public GCMHelper (Context context)
{
this.context= context;
}
public String GCMRegister (String SENDER_ID) throws Exception
{
String regid = "";
//Check if Play store services are available.
if(!checkPlayServices())
throw new Exception("Google Play Services not supported. Please install and configure Google Play Store.");
if (gcm == null) {
gcm = GoogleCloudMessaging.getInstance(context);
}
regid = gcm.register(SENDER_ID);
return regid;
}
private static boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(context);
if (resultCode != ConnectionResult.SUCCESS) {
return false;
}
return true;
}
}
2.Then create GetGCM() method in in Activity.
//**To avoid java.io.IOException: MAIN_THREAD**
private void GetGCM() {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
GCMHelper gcmRegistrationHelper = new GCMHelper (
getApplicationContext());
String gcmRegID = gcmRegistrationHelper.GCMRegister(SENDER_ID);
} catch (Exception bug) {
bug.printStackTrace();
}
}
});
thread.start();
}
3.Then call GetGCM() method wherever you want.
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MarcD
Computer Science Student and Intern at Koodoo Creative
Updated on September 15, 2022Comments
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MarcD over 1 year
I am currently building an application that uses the new Google Cloud Messaging system. I have a HTTP client server set up on a live environment to allow me to test through my mobile devices, but when ever I try to register with the GCM I keep getting a IOException that states that
gcm.register()
is receiving an Unknown Source stopping me from getting the Registration Id I need to allow my server send messages to my device.I have checked several times to see if my Sender Id is wrong and I have checked over my manifest as well to see if I have that wrong as well and I cannot seem to find the problem. Looking around also hasn't provided any answer to my problem.
Here is my Log:
07-18 11:34:25.487: W/System.err(3093): java.io.IOException: MAIN_THREAD 07-18 11:34:25.497: W/System.err(3093): at com.google.android.gms.gcm.GoogleCloudMessaging.register(Unknown Source) 07-18 11:34:25.497: W/System.err(3093): at koodoo.pushtest.MainActivity.onCreate(MainActivity.java:94) 07-18 11:34:25.497: W/System.err(3093): at android.app.Activity.performCreate(Activity.java:4492) 07-18 11:34:25.497: W/System.err(3093): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 07-18 11:34:25.497: W/System.err(3093): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 07-18 11:34:25.497: W/System.err(3093): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 07-18 11:34:25.497: W/System.err(3093): at android.app.ActivityThread.access$600(ActivityThread.java:123) 07-18 11:34:25.497: W/System.err(3093): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 07-18 11:34:25.497: W/System.err(3093): at android.os.Handler.dispatchMessage(Handler.java:99) 07-18 11:34:25.497: W/System.err(3093): at android.os.Looper.loop(Looper.java:137) 07-18 11:34:25.497: W/System.err(3093): at android.app.ActivityThread.main(ActivityThread.java:4424) 07-18 11:34:25.497: W/System.err(3093): at java.lang.reflect.Method.invokeNative(Native Method) 07-18 11:34:25.497: W/System.err(3093): at java.lang.reflect.Method.invoke(Method.java:511) 07-18 11:34:25.497: W/System.err(3093): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 07-18 11:34:25.497: W/System.err(3093): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 07-18 11:34:25.497: W/System.err(3093): at dalvik.system.NativeStart.main(Native Method)
Here is my Manifest:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="koodoo.pushtest" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <!-- GCM connects to Internet Services. --> <uses-permission android:name="android.permission.INTERNET" /> <!-- GCM requires a Google account. --> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <!-- Keeps the processor from sleeping when a message is received. --> <uses-permission android:name="android.permission.WAKE_LOCK" /> <!-- Creates a custom permission so only this app can receive its messages. --> <permission android:name="koodoo.pushtest.permission.C2D_MESSAGE" android:protectionLevel="signature" /> <uses-permission android:name="koodoo.pushtest.permission.C2D_MESSAGE" /> <!-- This app has permission to register and receive data message. --> <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /> <!-- Network State Permissions to detect Internet status --> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <!-- Permission to vibrate --> <uses-permission android:name="android.permission.VIBRATE" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="koodoo.pushtest.MainActivity" android:label="@string/app_name" > </activity> <receiver android:name="com.google.android.gcm.GCMBroadcastReceiver" android:permission="com.google.android.c2dm.permission.SEND" > <intent-filter> <!-- Receives the actual messages. --> <action android:name="com.google.android.c2dm.intent.RECEIVE" /> <!-- Receives the registration id. --> <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> <category android:name="koodoo.pushtest" /> </intent-filter> </receiver> <service android:name="com.google.android.gcm.GCMIntentService" /> <activity android:name="koodoo.pushtest.RegisterActivity" android:label="@string/title_activity_register" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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Ashish Dwivedi almost 10 yearsNot work for me, I create a demo from Android Document as you mention above, I create all code from developer site but still I got same IOException...