尝试从Firebase数据库中检索数据，一切正常，然后在几次请求之后我看到了奇怪的日志，而且没有数据被检索到，Firebase事件没有调用我在logcat中看到的网络。
这是完整的日志。我使用的是Firebase 11.0.2
07-14 10:22:58.933 2462-16349/com.google.android.gms V/FA-SVC: Logging event: origin=auto,name=session_start(_s),params=Bundle[{firebase_event_origin(_o)=auto, firebase_screen_class(_sc)=MainActivity, firebase_screen_id(_si)=-2277481415355967345}]
07-14 10:22:58.936 2462-16349/com.google.android.gms V/FA-SVC: Saving event, name, data size: session_start(_s), 53
07-14 10:22:58.936 2462-16349/com.google.android.gms V/FA-SVC: Event recorded: Event{appId='com.contentoffice', name='session_start(_s)', params=Bundle[{firebase_event_origin(_o)=auto, firebase_screen_class(_sc)=MainActivity, firebase_screen_id(_si)=-2277481415355967345}]}
07-14 10:22:58.938 2462-16349/com.google.android.gms V/FA-SVC: Upload scheduled in approximately ms: 456
07-14 10:22:58.939 2462-16349/com.google.android.gms V/FA-SVC: Cancelling job. JobID: 812057698
07-14 10:22:58.940 2462-16349/com.google.android.gms V/FA-SVC: Scheduling upload with DelayedRunnable
07-14 10:22:58.940 2462-16349/com.google.android.gms V/FA-SVC: Scheduling upload with AlarmManager
07-14 10:22:58.940 2462-16349/com.google.android.gms V/FA-SVC: Background event processing time, ms: 7
07-14 10:22:59.400 2462-16349/com.google.android.gms V/FA-SVC: Sending upload intent from DelayedRunnable
07-14 10:22:59.403 2462-2462/com.google.android.gms V/FA-SVC: Device receiver got: com.google.android.gms.measurement.UPLOAD
07-14 10:22:59.407 2462-2462/com.google.android.gms V/FA-SVC: Device PackageMeasurementService is starting up
07-14 10:22:59.408 2462-2462/com.google.android.gms V/FA-SVC: Device PackageMeasurementService called. startId, action: 1, com.google.android.gms.measurement.UPLOAD
07-14 10:22:59.410 2462-16349/com.google.android.gms D/FA-SVC: Uploading events. Elapsed time since last upload attempt (ms): 10015
07-14 10:22:59.411 2462-16349/com.google.android.gms V/FA-SVC: Fetching remote configuration: com.contentoffice
07-14 10:22:59.411 2462-16349/com.google.android.gms V/FA-SVC: Not stopping services. fetch, network, upload: true, false, false
07-14 10:22:59.537 2462-16349/com.google.android.gms V/FA-SVC: onConfigFetched. Response size: 0
07-14 10:22:59.539 2462-16349/com.google.android.gms V/FA-SVC: Successfully fetched config. Got network response. code, size: 304, 0
07-14 10:22:59.547 2462-16349/com.google.android.gms V/FA-SVC: Saving bundle, size: 458
07-14 10:22:59.547 2462-16349/com.google.android.gms D/FA-SVC: Uploading events. Elapsed time since last upload attempt (ms): 10147
07-14 10:22:59.550 2462-16349/com.google.android.gms V/FA-SVC: Uploading data. app, uncompressed size, data: com.contentoffice, 586,
batch {
bundle {
protocol_version: 1
platform: android
gmp_version: 11020
uploading_gmp_version: 11055
config_version: 1499088177858764
gmp_app_id: 1:338872414290:android:1cfea40718f29dbd
app_id: com.contentoffice
app_version: 1.0
app_version_major: 1
firebase_instance_id: cAtrMCzM1uc
dev_cert_hash: -3540713154163920889
app_store: manual_install
upload_timestamp_millis: 1499998979541
start_timestamp_millis: 1499998968774
end_timestamp_millis: 1499998978912
app_instance_id: 071025213b0f2723ab50b3f71036b979
resettable_device_id: c3085378-5d4c-4053-a8dd-99d8139c7b36
limited_ad_tracking: false
os_version: 7.1.1
device_model: Android SDK built for x86
user_default_language: en-us
time_zone_offset_minutes: 480
bundle_sequential_index: 1
service_upload: true
user_property {
set_timestamp_millis: 1499998968774
name: first_open_time(_fot)
int_value: 1500001200000
}
user_property {
set_timestamp_millis: 1499998968774
name: first_open_after_install(_fi)
int_value: 1
}
event {
name: first_open(_f)
timestamp_millis: 1499998968774
previous_timestamp_millis: 0
param {
name: firebase_conversion(_c)
int_value: 1
}
param {
name: firebase_event_origin(_o)
string_value: auto
}
param {
name: _r
int_value: 1
}
param {
name: previous_first_open_count(_pfo)
int_value: 6
}
param {
name: system_app(_sys)
int_value: 0
}
param {
name: update_with_analytics(_uwa)
int_value: 0
}
param {
name: system_app_update(_sysu)
int_value: 0
}
}
event {
name: user_engagement(_e)
timestamp_millis: 1499998968774
previous_timestamp_millis: 0
param {
name: firebase_event_origin(_o)
string_value: auto
}
param {
name: engagement_time_msec(_et)
int_value: 1
}
}
event {
name: screen_view(_vs)
timestamp_millis: 1499998968911
previous_timestamp_millis: 0
param {
name: firebase_event_origin(_o)
string_value: auto
}
param {
name: firebase_screen_class(_sc)
string_value: MainActivity
}
param {
name: firebase_screen_id(_si)
int_value: -2277481415355967345
}
}
event {
name: session_start(_s)
timestamp_millis: 1499998978912
previous_timestamp_millis: 0
param {
name: firebase_event_origin(_o)
string_value: auto
}
param {
name: firebase_screen_class(_sc)
string_value: MainActivity
}
param {
name: firebase_screen_id(_si)
int_value: -2277481415355967345
}
}
}
}
07-14 10:22:59.550 2462-16349/com.google.android.gms V/FA-SVC: Not stopping services. fetch, network, upload: true, true, false
07-14 10:22:59.552 2462-16500/com.google.android.gms V/FA-SVC: Uploading data. size: 472
07-14 10:22:59.558 2462-16349/com.google.android.gms V/FA-SVC: Not stopping services. fetch, network, upload: false, true, false
07-14 10:22:59.662 2462-16349/com.google.android.gms V/FA-SVC: Upload scheduled in approximately ms: 3599994
07-14 10:22:59.664 2462-16349/com.google.android.gms V/FA-SVC: Cancelling job. JobID: 812057698
07-14 10:22:59.664 2462-16349/com.google.android.gms V/FA-SVC: Scheduling upload with AlarmManager
07-14 10:22:59.667 2462-16349/com.google.android.gms V/FA-SVC: Successful upload. Got network response. code, size: 204, 0
07-14 10:22:59.675 2462-16349/com.google.android.gms V/FA-SVC: Nothing to upload or uploading impossible
07-14 10:22:59.676 2462-16349/com.google.android.gms V/FA-SVC: Cancelling job. JobID: 812057698
07-14 10:22:59.677 2462-16349/com.google.android.gms V/FA-SVC: Stopping uploading service(s)
07-14 10:22:59.678 2462-16349/com.google.android.gms V/FA-SVC: Device PackageMeasurementService processed last upload request. StartId: 1
07-14 10:22:59.678 2462-2462/com.google.android.gms V/FA-SVC: Device PackageMeasurementService is shutting down
07-14 10:23:00.022 1792-2032/com.android.systemui D/EGL_emulation: eglMakeCurrent: 0x9fee93e0: ver 2 0 (tinfo 0x90f44540)
07-14 10:23:03.567 2170-15958/com.google.android.apps.nexuslauncher I/ClearcutLoggerApiImpl: disconnect managed GoogleApiClient
07-14 10:23:03.939 16294-16330/com.contentoffice V/FA: Inactivity, disconnecting from the service
以下是我要拨打Firebase的信息
val query = FirebaseDatabase.getInstance().reference.child("posts").child("collection").limitToLast(10)
答案 0 :(得分：0)
您是否将Google Play服务安装到您的模拟器？如果是，请重新启动模拟器和Android Studio而不是再试一次。有时候会出现这样的错误。
答案 1 :(得分：0)
这里似乎也报告了它的Firebase迁移问题：
https://github.com/firebase/firebase-android-sdk/issues/1944