I am trying to get GCM
working in my app (to notify users when our hours change, or when we have any promos going on), but I keep getting the error Cannot resolve symbol 'GoogleCloudMessaging'
when trying to use the Google Cloud Messaging API.
I am using the newly released Android studio IDE to code this.
Here is my GcmBroadcastReciever.java code :
import android.R;
import android.app.Activity;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class GcmBroadcastReceiver extends BroadcastReceiver
{
static final String TAG = "GCMDemo";
public static final int NOTIFICATION_ID = 1;
private NotificationManager mNotificationManager;
Context ctx;
GoogleCloudMessaging gcm; // I get the error here
@Override
public void onReceive(Context context, Intent intent) {
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(context); //error
ctx = context;
String messageType = gcm.getMessageType(intent); //cannot resolve method here
if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR.equals(messageType)) { //error
sendNotification("Send error: " + intent.getExtras().toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED.equals(messageType)) { //error
sendNotification("Deleted messages on server: " +
intent.getExtras().toString());
} else {
sendNotification("Received: " + intent.getExtras().toString());
}
setResultCode(Activity.RESULT_OK);
}
// Put the GCM message into a notification and post it.
private void sendNotification(String msg) {
mNotificationManager = (NotificationManager)
ctx.getSystemService(Context.NOTIFICATION_SERVICE);
PendingIntent contentIntent = PendingIntent.getActivity(ctx, 0,
new Intent(ctx, Activity.class), 0);
Toast.makeText(ctx, msg, Toast.LENGTH_SHORT).show();
}
}
The sections below guide you through the process of setting up a GCM implementation. Before you start, make sure to set up the Google Play Services SDK. You need this SDK to use the GoogleCloudMessaging methods. Strictly speaking, the only thing you absolutely need this API for is upstream (device-to-cloud) messaging, but it also offers a streamlined registration API that is recommended.
Did you set up the Google Play Services SDK?
You have to :
<android-sdk>/extras/google/google_play_services/libproject/google-play-services_lib/
library project in your Android project.To install the Google Play services SDK for development:
1. Launch the SDK Manager. - From Eclipse (with ADT), select Window > Android SDK Manager. - On Windows, double-click the SDK Manager.exe file at the root of the Android SDK directory. - On Mac or Linux, open a terminal and navigate to the tools/ directory in the Android SDK, then execute android sdk. 2. Install the Google Play services SDK. Scroll to the bottom of the package list, expand Extras, select Google Play services, and install it. The Google Play services SDK is saved in your Android SDK environment at <android-sdk>/extras/google/google_play_services/. 3. Install a compatible version of the Google APIs platform. If you want to test your app on the emulator, expand the directory for Android 4.2.2 (API 17) or a higher version, select Google APIs, and install it. Then create a new AVD with Google APIs as the platform target. Note: Only Android 4.2.2 and higher versions of the Google APIs platform include Google Play services.