Question

我正在尝试使用GCM向我的Android应用添加通知。我开始遵循这个 tutorial并使用this example project作为参考。

我按照所有步骤创建了所有需要的类和服务，但我仍然没有收到任何通知。我正在检查Google Play服务，似乎在我的服务器上成功注册了我的设备。我将google-services.json文件添加到我的项目中，并将所有权限和库添加到项目中。

出了什么问题？
我忘了什么吗？我还需要做点什么吗？我现在很困惑。

AndroidManifest

权限

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE"/>
<permission android:name="com.manager_android.permission.C2D_MESSAGE" android:protectionLevel="signature"/>
<uses-permission android:name="com.manager_android.permission.C2D_MESSAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

接收者和服务

<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" />
            <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
            <category android:name="com.manager_android" />
            <!--here-->
        </intent-filter>
    </receiver>

    <service
        android:name=".Activities.GcmIntentService"
        android:exported="false" >
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        </intent-filter>
    </service>

    <service
        android:name=".Activities.TokenRefreshListenerService"
        android:exported="false">
        <intent-filter>
            <action android:name="com.google.android.gms.iid.InstanceID"/>
        </intent-filter>
    </service>

    <service android:name=".Activities.RegistrationService"
        android:exported="false">
    </service>

已添加到应用 build.gradle

compile 'com.google.android.gms:play-services-gcm:11.0.4'

apply plugin: 'com.google.gms.google-services'

添加到项目 build.gradle

classpath 'com.google.gms:google-services:3.1.0'

RegistrationService

public class RegistrationService extends IntentService {

public RegistrationService() {
    super("");
}

private final String TAG = "RegistrationInfo";

@Override
protected void onHandleIntent(@Nullable Intent intent) {
    registerDevice();
}

private void registerDevice() {
    InstanceID myID = InstanceID.getInstance(getApplicationContext());
    String registratonToken = "";
    try {
        registratonToken = myID.getToken(getString(R.string.gcm_defaultSenderId),
                GoogleCloudMessaging.INSTANCE_ID_SCOPE, null);
        log.d("Registration Token", registratonToken);
        Map<String, String> params = new HashMap<>();
        params.put("user_id", registratonToken);
        params.put("platform", "GCM");
        SaveSharedPreference.setToken(getApplicationContext(), registratonToken);

        //Register token on server
        Communication.post(getString(R.string.register_device_url), new RequestParams(params), new AsyncHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                Log.i(TAG, "Registration was successful");
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
                Log.i(TAG, "Registration failed.");
            }
        });
    } catch (IOException e) {
        Toast.makeText(getApplicationContext(), "Couldn't register device", Toast.LENGTH_SHORT).show();
        e.printStackTrace();
    }
}

TokenRefreshListenerService

public class TokenRefreshListenerService extends InstanceIDListenerService {

@Override
public void onTokenRefresh() {
    Intent i = new Intent(this, RegistrationService.class);
    startService(i);
}
}

GCMIntentService

public class GcmIntentService extends GcmListenerService {

private int testId = 1234;

@Override
public void onMessageReceived(String from, Bundle data) {
    String message = data.getString("message");
    sendNotification(message);
}

private void sendNotification(String message) {
    Intent intent = new Intent(this, MainScreenActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), testId, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.logo)
            .setContentTitle("GCM Message")
            .setContentText(message)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent)
            .setWhen(System.currentTimeMillis());

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(testId, notificationBuilder.build());
}
}

当用户登录注册设备时，我将RegistrationService作为服务启动。

Answer 1

此documentation可以帮助您了解通知。

通知是您向自己以外的用户显示的消息应用程序的正常用户界面。当您告诉系统发出通知时，它首先在通知区域中显示为图标。要查看详细信息通知，用户打开通知抽屉。这俩通知区域和通知抽屉是系统控制的用户可以随时查看的区域。

它还提供了您将要处理的每个主题的示例代码。

对于GCM，您可以参考this documentation。

Google Cloud Messaging（GCM）是一项支持开发人员的免费服务在服务器和客户端应用之间发送消息。这包括从服务器到客户端应用程序和上游消息的下游消息从客户端应用程序到服务器。

它将帮助您了解GCM的概念。它还提供sample开头。

Android应用未收到gcm通知

1 个答案: