火力基地".MyFirebaseInstanceIDService"和".java.MyFirebaseMessagingService"的未解析类

Question

我正试图将Firebase和FCM导入我的android应用程序，但我得到了

firebase".MyFirebaseInstanceIDService"的未解析类firebase".java.MyFirebaseMessagingService"的未解析包

是一个"错误"。当然，这并没有阻止我的应用程序运行或构建，但我根本无法在任何类中调用onTokenRefresh。所以，我相信这个问题使我无法使用Firebase。

这是我的应用程序构建；

apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.northlandcaps.crisis_response"
minSdkVersion 21
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
android {
lintOptions {
checkReleaseBuilds false
// Or, if you prefer, you can continue to check for errors in release builds,
// but continue the build even when errors are found:
abortOnError false
}
}
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation 'com.google.firebase:firebase-core:16.0.5'
implementation fileTree(dir: 'libs', include: ['*.jar'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support:mediarouter-v7:28.0.0'
implementation 'com.android.volley:volley:1.1.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'
implementation 'com.google.firebase:firebase-messaging:17.3.4'
}
apply plugin: 'com.google.gms.google-services'

问题的屏幕截图

Answer 1

这两个类应该是这样的：

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
private static final String TAG = "MyFirebaseIIDService";
@Override
public void onTokenRefresh() {
super.onTokenRefresh();
String refreshedToken = FirebaseInstanceId.getInstance().getToken();
Log.d(TAG, "Refreshed token: " + refreshedToken);
sendRegistrationToServer(refreshedToken);
}
private void sendRegistrationToServer(String token) {
// Add custom implementation, as needed.
}
}

和：

public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
RemoteMessage.Notification notification = remoteMessage.getNotification();
Map<String, String> data = remoteMessage.getData();
sendNotification(notification, data);
}
private void sendNotification(RemoteMessage.Notification notification, Map<String, String> data) {
//Send notification
}
}