android - 在 MyFirebaseInstanceIDService 的 onTokenRefresh 方法中始终获取 Null 值

Question

我在 onTokenRefresh 方法中获取 token 时遇到问题

以下是我的 list 文件

   <uses-permission android:name="android.permission.INTERNET" />
 <service
        android:name=".fcmService.MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>

    <service
        android:name=".fcmService.MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>

以下是我的MyFirebaseInstanceIDService

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {

private static final String TAG = MyFirebaseInstanceIDService.class.getSimpleName();

@Override
public void onTokenRefresh() {
String refreshedToken = FirebaseInstanceId.getInstance().getToken();

 Log.d(TAG, "@@ onTokenRefresh: " + refreshedToken);
    sendRegistrationToServer(refreshedToken);
    // Saving reg id to shared preferences
    storeRegIdInPref(refreshedToken);

}

我在启动画面中调用 MyFirebaseInstanceIDService 就像这样......

MyFirebaseInstanceIDService myFirebaseInstanceIdService = new MyFirebaseInstanceIDService();
                myFirebaseInstanceIdService.onTokenRefresh();

提前感谢您的帮助。

Answer 1

你不能像那样使用它的实例调用服务方法，因为它需要在工作线程上运行，

您必须启动服务并使用其他服务获取 token 。

只要当前 token 失效，FCM 就会调用 token 刷新，

通过扩展 IntentService 类创建另一个服务，

@Override
protected void onHandleIntent(Intent intent) {

    try {
        String token = FirebaseInstanceId.getInstance().getToken();
        Log.d(TAG, "Refreshed token: " + token);
        // [END get_token]
        sendRegistrationToServer(token);

        // Subscribe to topic channels

        // You should store a boolean that indicates whether the generated token has been
        // sent to your server. If the boolean is false, send the token to your server,
        // otherwise your server should have already received the token.
        // [END register_for_gcm]
    } catch (Exception e) {
        Log.e(TAG, "Failed to complete token refresh", e);
        // If an exception happens while fetching the new token or updating our registration data
        // on a third-party server, this ensures that we'll attempt the update at a later time.
    }
}

也可以通过onTokenRefresh()方法启动上述服务，避免代码重复。