我正在尝试在我的应用程序中包含聊天功能。它发送和接收用户消息很好。但是，当我使用FCM通知时，当我打开用户聊天框向其他用户发送消息时，它一直崩溃。我使用了Retrofit2，它一直告诉我baseUrl有问题，但是我无法弄清楚。请帮助我。
我的摇篮：
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'com.google.android.material:material:1.0.0'
implementation "androidx.cardview:cardview:1.0.0"
implementation 'com.google.firebase:firebase-database:19.3.1'
implementation 'com.firebaseui:firebase-ui-firestore:6.2.1'
implementation 'com.google.firebase:firebase-storage:19.1.1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'com.google.firebase:firebase-auth:19.3.1'
implementation 'com.google.firebase:firebase-core:17.4.3'
implementation 'com.google.firebase:firebase-config:19.1.4'
implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
implementation 'com.google.firebase:firebase-messaging:20.2.1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}
我的服务：
<service android:name=".Notification.MyFirebaseMessaging"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT"/>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
</intent-filter>
</service>
我的FirebaseMessagingService：
public class MyFirebaseMessaging extends FirebaseMessagingService {
@Override
public void onNewToken(@NonNull String refreshToken) {
super.onNewToken(refreshToken);
FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
refreshToken = FirebaseInstanceId.getInstance().getToken();
if (firebaseUser != null){
updateToken(refreshToken);
}
}
private void updateToken(String refreshToken) {
FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Tokens");
Token token = new Token(refreshToken);
reference.child(firebaseUser.getUid()).setValue(token);
}
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
String sented = remoteMessage.getData().get("sented");
String user = remoteMessage.getData().get("user");
SharedPreferences preferences = getSharedPreferences("PREFS", MODE_PRIVATE);
String currentUser = preferences.getString("currentuser", "none");
FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
if (firebaseUser != null && sented.equals(firebaseUser.getUid())){
if (!currentUser.equals(user)) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
sendOreoNotification(remoteMessage);
} else {
sendNotification(remoteMessage);
}
}
}
}
private void sendOreoNotification(RemoteMessage remoteMessage){
String user = remoteMessage.getData().get("user");
String icon = remoteMessage.getData().get("icon");
String title = remoteMessage.getData().get("title");
String body = remoteMessage.getData().get("body");
RemoteMessage.Notification notification = remoteMessage.getNotification();
int j = Integer.parseInt(user.replaceAll("[\\D]", ""));
Intent intent = new Intent(this, Messaging.class);
Bundle bundle = new Bundle();
bundle.putString("chatID", user);
intent.putExtras(bundle);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, j, intent, PendingIntent.FLAG_ONE_SHOT);
Uri defaultSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
OreoNotification oreoNotification = new OreoNotification(this);
Notification.Builder builder = oreoNotification.getOreoNotification(title, body, pendingIntent,
defaultSound, icon);
int i = 0;
if (j > 0){
i = j;
}
oreoNotification.getManager().notify(i, builder.build());
}
private void sendNotification(RemoteMessage remoteMessage) {
String user = remoteMessage.getData().get("user");
String icon = remoteMessage.getData().get("icon");
String title = remoteMessage.getData().get("title");
String body = remoteMessage.getData().get("body");
RemoteMessage.Notification notification = remoteMessage.getNotification();
int j = Integer.parseInt(user.replaceAll("[\\D]", ""));
Intent intent = new Intent(this, Messaging.class);
Bundle bundle = new Bundle();
bundle.putString("chatID", user);
intent.putExtras(bundle);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, j, intent, PendingIntent.FLAG_ONE_SHOT);
Uri defaultSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
.setSmallIcon(Integer.parseInt(icon))
.setContentTitle(title)
.setContentText(body)
.setAutoCancel(true)
.setSound(defaultSound)
.setContentIntent(pendingIntent);
NotificationManager noti = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
int i = 0;
if (j > 0){
i = j;
}
noti.notify(i, builder.build());
}
}
我的客户班：
public class Client {
private static Retrofit retrofit = null;
public static Retrofit getClient(){
if (retrofit == null){
retrofit = new Retrofit.Builder()
.baseUrl("https://fcm.googleapis.com/")
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
我的消息发送方法：
private void sendMessage(String sender, final String receiver, String message){
DatabaseReference reference2 = FirebaseDatabase.getInstance().getReference();
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("sender", sender);
hashMap.put("receiver", receiver);
hashMap.put("message", message);
hashMap.put("isseen", false);
reference2.child("Chats").push().setValue(hashMap);
final String msg = message;
reference = FirebaseFirestore.getInstance().collection("Volunteers");
reference.document(fuser.getUid()).addSnapshotListener(this,new EventListener<DocumentSnapshot>() {
@Override
public void onEvent(@Nullable DocumentSnapshot documentSnapshot, @Nullable FirebaseFirestoreException e) {
if(e != null){
return;
}else if (documentSnapshot != null && documentSnapshot.exists()){
if(notify) {
sendNotification(receiver, documentSnapshot.getString("vol_name"), msg);
}
notify = false;
}
}
});
}
我的通知发送方法：
private void sendNotification(String receiver, final String username, final String message){
DatabaseReference tokens = FirebaseDatabase.getInstance().getReference("Tokens");
Query query = tokens.orderByKey().equalTo(receiver);
query.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
Token token = snapshot.getValue(Token.class);
Data data = new Data(fuser.getUid(), R.mipmap.ic_launcher, username+": "+message, "New Message",
chatID);
Sender sender = new Sender(data, token.getToken());
retrofit2.Call<MyResponse> responseBodyCall = apiService.sendNotification(sender);
responseBodyCall.enqueue(new Callback<MyResponse>() {
@Override
public void onResponse(Call<MyResponse> call, Response<MyResponse> response) {
if (response.code() == 200){
if (response.body().success != 1){
Toast.makeText(Messaging.this, "Failed!", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onFailure(Call<MyResponse> call, Throwable t) {
}
});
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
它在logcat中显示此错误：
2020-06-24 02:46:17.490 26478-26478/com.developer_ar.charity E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.developer_ar.charity, PID: 26478
java.lang.NoSuchMethodError: No static method metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite; in class Ljava/lang/invoke/LambdaMetafactory; or its super classes (declaration of 'java.lang.invoke.LambdaMetafactory' appears in /apex/com.android.runtime/javalib/core-oj.jar)
at okhttp3.internal.Util.<clinit>(Util.java:87)
at okhttp3.internal.Util.skipLeadingAsciiWhitespace(Util.java:321)
at okhttp3.HttpUrl$Builder.parse(HttpUrl.java:1313)
at okhttp3.HttpUrl.get(HttpUrl.java:917)
at retrofit2.Retrofit$Builder.baseUrl(Retrofit.java:506)
---> at com.developer_ar.charity.Notification.Client.getClient(Client.java:15)
---> at com.developer_ar.charity.Messaging.onCreate(Messaging.java:93)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
在这一行：
apiService = Client.getClient().create(APIService.class);
在这一行：
.baseUrl("https://fcm.googleapis.com/")