Artur-Sulej · November 29, 2015 12:55 · Nov 29, 2015
diff --git a/GcmUtil.java b/GcmUtil.java
@@ -0,0 +1,27 @@
+public class GcmUtil {
+
+    public static String getToken(Context context) throws IOException {
+        InstanceID instanceID = InstanceID.getInstance(context);
+        return instanceID.getToken(context.getString(R.string.gcm_defaultSenderId),
+                GoogleCloudMessaging.INSTANCE_ID_SCOPE, null);
+    }
+
+    public static String getTokenOnThread(final Context context) {
+        try {
+            return new AsyncTask<Void, Void, String>() {
+                @Override
+                protected String doInBackground(Void... params) {
+                    try {
+                        return getToken(context);
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                        return null;
+                    }
+                }
+            }.execute().get(30L, TimeUnit.SECONDS);
+        } catch (InterruptedException | TimeoutException | ExecutionException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+}