这是我的客户端代码。当我在应用程序内时，消息和通知工作正常，但当我不在应用程序内时，应用程序内的消息不会显示，但通知工作。有什么错误？提前谢谢
package com.example.androidgcmclient;
import android.os.Bundle;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gcm.GCMRegistrar;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
// Replace the xxx with the project id generated from the Google console when
// you defined a Google APIs project.
private static final String SENDER_ID = "my_sender_id";
// This tag is used in Log.x() calls
private static final String TAG = "MainActivity";
// This string will hold the lengthy registration id that comes
// from GCMRegistrar.register()
private String regId = "";
// These strings are hopefully self-explanatory
private String registrationStatus = "Not yet registered";
private String broadcastMessage = "No broadcast message";
// This intent filter will be set to filter on the string "GCM_RECEIVED_ACTION"
IntentFilter gcmFilter;
// textviews used to show the status of our app's registration, and the latest
// broadcast message.
TextView tvRegStatusResult;
TextView tvBroadcastMessage;
// This broadcastreceiver instance will receive messages broadcast
// with the action "GCM_RECEIVED_ACTION" via the gcmFilter
// A BroadcastReceiver must override the onReceive() event.
private BroadcastReceiver gcmReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
broadcastMessage = intent.getExtras().getString("gcm");
if (broadcastMessage != null) {
// display our received message
tvBroadcastMessage.setText(broadcastMessage);
Log.d(TAG, "message received");
}
}
};
// Reminder that the onCreate() method is not just called when an app is first opened,
// but, among other occasions, is called when the device changes orientation.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvBroadcastMessage = (TextView) findViewById(R.id.tv_message);
tvRegStatusResult = (TextView) findViewById(R.id.tv_reg_status_result);
// Create our IntentFilter, which will be used in conjunction with a
// broadcast receiver.
gcmFilter = new IntentFilter();
gcmFilter.addAction("GCM_RECEIVED_ACTION");
registerClient();
}
// This registerClient() method checks the current device, checks the
// manifest for the appropriate rights, and then retrieves a registration id
// from the GCM cloud. If there is no registration id, GCMRegistrar will
// register this device for the specified project, which will return a
// registration id.
public void registerClient() {
try {
// Check that the device supports GCM (should be in a try / catch)
GCMRegistrar.checkDevice(this);
// Check the manifest to be sure this app has all the required
// permissions.
GCMRegistrar.checkManifest(this);
// Get the existing registration id, if it exists.
regId = GCMRegistrar.getRegistrationId(this);
if (regId.equals("")) {
registrationStatus = "Registering...";
tvRegStatusResult.setText(registrationStatus);
// register this device for this project
GCMRegistrar.register(this, SENDER_ID);
regId = GCMRegistrar.getRegistrationId(this);
registrationStatus = "Registration Acquired";
// This is actually a dummy function. At this point, one
// would send the registration id, and other identifying
// information to your server, which should save the id
// for use when broadcasting messages.
sendRegistrationToServer();
} else {
registrationStatus = "Already registered "+GCMRegistrar.getRegistrationId(this);
/* GCMRegistrar.unregister(this); regId="";
Toast.makeText(getApplicationContext(), "Unregistered", Toast.LENGTH_LONG).show();*/
}
} catch (Exception e) {
e.printStackTrace();
registrationStatus = e.getMessage();
}
Log.d(TAG, registrationStatus);
tvRegStatusResult.setText(registrationStatus);
Toast.makeText(getApplicationContext(), "reg acq "+regId, Toast.LENGTH_LONG).show();
// This is part of our CHEAT. For this demo, you'll need to
// capture this registration id so it can be used in our demo web
// service.
Log.d(TAG, regId);
}
private void sendRegistrationToServer() {
// This is an empty placeholder for an asynchronous task to post the
// registration
// id and any other identifying information to your server.
}
// If the user changes the orientation of his phone, the current activity
// is destroyed, and then re-created. This means that our broadcast message
// will get wiped out during re-orientation.
// So, we save the broadcastmessage during an onSaveInstanceState()
// event, which is called prior to the destruction of the activity.
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putString("BroadcastMessage", broadcastMessage);
}
// When an activity is re-created, the os generates an onRestoreInstanceState()
// event, passing it a bundle that contains any values that you may have put
// in during onSaveInstanceState()
// We can use this mechanism to re-display our last broadcast message.
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
broadcastMessage = savedInstanceState.getString("BroadcastMessage");
tvBroadcastMessage.setText(broadcastMessage);
}
// If our activity is paused, it is important to UN-register any
// broadcast receivers.
@Override
protected void onPause() {
unregisterReceiver(gcmReceiver);
super.onPause();
}
// When an activity is resumed, be sure to register any
// broadcast receivers with the appropriate intent
@Override
protected void onResume() {
super.onResume();
registerReceiver(gcmReceiver, gcmFilter);
}
// There are no menus for this demo app. This is just
// boilerplate code.
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
// NOTE the call to GCMRegistrar.onDestroy()
@Override
public void onDestroy() {
GCMRegistrar.onDestroy(this);
super.onDestroy();
}
}
和 GCMIntentService 类
package com.example.androidgcmclient;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import android.support.v4.app.NotificationCompat.Builder;
import com.google.android.gcm.GCMBaseIntentService;
public class GCMIntentService extends GCMBaseIntentService {
private static final String SENDER_ID = "my_sender_id";
private static final String TAG = "GCMIntentService";
public GCMIntentService()
{
super(SENDER_ID);
Log.d(TAG, "GCMIntentService init");
}
@Override
protected void onError(Context ctx, String sError) {
// TODO Auto-generated method stub
Log.d(TAG, "Error: " + sError);
Log.d(getClass().getSimpleName(), "onError: " + sError);
}
@Override
protected void onMessage(Context context, Intent intent) {
Log.d(TAG, "Message Received");
String message = intent.getStringExtra("message");
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
android.app.Notification notification = new android.app.Notification(
R.drawable.ic_launcher, message,
System.currentTimeMillis());
Intent notificationIntent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
notification.setLatestEventInfo(context,
"Webexpenses Claim Report", message, pendingIntent);
notificationManager.notify(10001, notification);
sendGCMIntent(context, message);
Log.d(getClass().getSimpleName(), "Message Received");
}
private void sendGCMIntent(Context ctx, String message) {
Intent broadcastIntent = new Intent();
broadcastIntent.setAction("GCM_RECEIVED_ACTION");
broadcastIntent.putExtra("gcm", message);
ctx.sendBroadcast(broadcastIntent);
}
@Override
protected void onRegistered(Context ctx, String regId) {
// TODO Auto-generated method stub
// send regId to your server
Log.d(TAG, regId);
Log.d(getClass().getSimpleName(), "onRegistered: " + regId);
Toast.makeText(this, regId, Toast.LENGTH_LONG).show();
}
@Override
protected void onUnregistered(Context ctx, String regId) {
// TODO Auto-generated method stub
// send notification to your server to remove that regId
Log.d(getClass().getSimpleName(), "onUnregistered: " + regId);
}
@Override
protected boolean onRecoverableError(Context ctxt, String errorMsg) {
Log.d(getClass().getSimpleName(), "onRecoverableError: " + errorMsg);
return(true);
}
}
Android 清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidgcmclient"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<permission
android:name="com.example.androidgcmclient.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.androidgcmclient.permission.C2D_MESSAGE" />
<!-- receives GCM messages -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<!-- GCM connects to Google services -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- GCM requires a Google account -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.READ_OWNER_DATA" />
<!-- wake the processor if a GCM message is received -->
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.androidgcmclient.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="com.google.android.gcm.GCMBroadcastReceiver" android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.example.androidgcmclient" />
</intent-filter>
</receiver>
<service
android:name=".GCMIntentService">
</service>
</application>
</manifest>