Parse正在关闭，我找到了一些可以发送推送的服务。我希望使用GCM。我从github得到了一个例子并在android studio中创建了一个新项目并添加了这段代码。当我启动应用程序时，在控制台中我有
GCM Registration Token: dRmYwe49H4U:APA91bEECX4BfFbiRD7Ike9SHeunVqRim5T_F5YNmojInf-loo4GOxlVZfVlXcWCay2jbnFHEeo3QtoXIB418sxqyAtUBHH_bKO3snBmLemNE42L-6q61GqF5bnABt0Vcpy1Pm2rqTSN
我认为这是成功的，应用程序以gcm订阅。然后我使用service并尝试向设备发送一些推送消息。在服务中它显示Success但在设备中没有收到推送消息。并且不知道它为什么不起作用。
清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<permission android:name="com.example.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.permission.C2D_MESSAGE" />
<!-- [START gcm_permission] -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<!-- [END gcm_permission] -->
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:name="android.support.multidex.MultiDexApplication"
android:theme="@style/AppTheme">
<activity
android:name=".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>
<!-- [START gcm_receiver] -->
<receiver
android:name="com.google.android.gms.gcm.GcmReceiver"
android:exported="true"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="gcm.play.android.samples.com.gcmquickstart" />
</intent-filter>
</receiver>
<!-- [END gcm_receiver] -->
<!-- [START gcm_listener] -->
<service
android:name=".MyGcmListenerService"
android:exported="false" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
</intent-filter>
</service>
<!-- [END gcm_listener] -->
<!-- [START instanceId_listener] -->
<service
android:name=".MyInstanceIDListenerService"
android:exported="false">
<intent-filter>
<action android:name="com.google.android.gms.iid.InstanceID"/>
</intent-filter>
</service>
<!-- [END instanceId_listener] -->
<service
android:name=".RegistrationIntentService"
android:exported="false">
</service>
</application>
</manifest>
MainActivity
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
private static final String TAG = "RegIntentService";
private BroadcastReceiver mRegistrationBroadcastReceiver;
private ProgressBar mRegistrationProgressBar;
private TextView mInformationTextView;
GoogleCloudMessaging gcm;
String regid;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRegistrationProgressBar = (ProgressBar) findViewById(R.id.registrationProgressBar);
mRegistrationBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
mRegistrationProgressBar.setVisibility(ProgressBar.GONE);
SharedPreferences sharedPreferences =
PreferenceManager.getDefaultSharedPreferences(context);
boolean sentToken = sharedPreferences
.getBoolean(QuickstartPreferences.SENT_TOKEN_TO_SERVER, false);
if (sentToken) {
mInformationTextView.setText(getString(R.string.gcm_send_message));
} else {
mInformationTextView.setText(getString(R.string.token_error_message));
}
}
};
mInformationTextView = (TextView) findViewById(R.id.informationTextView);
if (checkPlayServices()) {
// Start IntentService to register this application with GCM.
Intent intent = new Intent(this, RegistrationIntentService.class);
startService(intent);
}
}
@Override
protected void onResume() {
super.onResume();
LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
new IntentFilter(QuickstartPreferences.REGISTRATION_COMPLETE));
}
@Override
protected void onPause() {
super.onPause();
LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
super.onPause();
}
/**
* Check the device to make sure it has the Google Play Services APK. If
* it doesn't, display a dialog that allows users to download the APK from
* the Google Play Store or enable it in the device's system settings.
*/
private boolean checkPlayServices() {
GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (apiAvailability.isUserResolvableError(resultCode)) {
apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
.show();
} else {
Log.i(TAG, "This device is not supported.");
finish();
}
return false;
}
return true;
}
MyGcmListenerService
private static final String TAG = "RegIntentService";
@Override
public void onMessageReceived(String from, Bundle data) {
String message = data.getString("message");
Log.e(TAG, "From: " + from);
Log.e(TAG, "Message: " + message);
if (from.startsWith("/topics/")) {
// message received from some topic.
} else {
// normal downstream message.
}
sendNotification(message);
}
private void sendNotification(String message) {
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.common_google_signin_btn_icon_dark)
.setContentTitle("GCM Message")
.setContentText(message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}
MyInstanceIDListenerService
@Override
public void onTokenRefresh() {
// Fetch updated Instance ID token and notify our app's server of any changes (if applicable).
Intent intent = new Intent(this, RegistrationIntentService.class);
startService(intent);
}
QuickstartPreferences
public static final String SENT_TOKEN_TO_SERVER = "37106xxxxxx";
public static final String REGISTRATION_COMPLETE = "registrationComplete";
RegistrationIntentService
private static final String TAG = "RegIntentService";
private static final String[] TOPICS = {"global"};
public RegistrationIntentService() {
super(TAG);
}
@Override
protected void onHandleIntent(Intent intent) {
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
try {
InstanceID instanceID = InstanceID.getInstance(this);
String token = instanceID.getToken(getString(R.string.google_app_id),
GoogleCloudMessaging.INSTANCE_ID_SCOPE, null);
// [END get_token]
Log.e(TAG, "GCM Registration Token: " + token);
// TODO: Implement this method to send any registration to your app's servers.
sendRegistrationToServer(token);
// Subscribe to topic channels
subscribeTopics(token);
sharedPreferences.edit().putBoolean(QuickstartPreferences.SENT_TOKEN_TO_SERVER, true).apply();
Log.e(TAG, "sharedPreferences");
} catch (Exception e) {
Log.e(TAG, "Failed to complete token refresh", e);
sharedPreferences.edit().putBoolean(QuickstartPreferences.SENT_TOKEN_TO_SERVER, false).apply();
}
Intent registrationComplete = new Intent(QuickstartPreferences.REGISTRATION_COMPLETE);
LocalBroadcastManager.getInstance(this).sendBroadcast(registrationComplete);
}
private void sendRegistrationToServer(String token) {
}
private void subscribeTopics(String token) throws IOException {
GcmPubSub pubSub = GcmPubSub.getInstance(this);
for (String topic : TOPICS) {
pubSub.subscribe(token, "/topics/" + topic, null);
}
}
答案 0 :(得分：3)
我刚刚编写了一个配方，其中包含设置构建脚本，Android Manifest和代码的分步说明。查看第4（最后）食谱： 使用Google Cloud Messaging推送通知 https://www.packtpub.com/books/content/practical-how-recipes-android
我还编写了一个基于Android的GCM测试程序，虽然它可能与您链接的功能相同。
答案 1 :(得分：1)
有时，设备无法接收推送消息，因为其Google Play服务应用未正确安装。这对于GCM至关重要，因为手机上的每个应用，从同步和API访问到推送通知，都通过Google Play服务。阅读this article，您就可以查看并下载最新版本的Google Play服务。
基于Google documentation，即使应用服务器向GCM发布消息并收回消息ID，也不意味着该消息已经传递给设备。它只意味着它被接受交付。邮件被接受后会发生什么情况取决于很多因素。
另外，请确保您正确地从Google收到set your SENDER ID，并确保您的设备正确registered with GCM service。