我按照文档中的说明在我的应用中添加了 Firebase 云消息功能。它似乎工作正常，但在前台接收时应用程序崩溃，但在接收关闭时运行良好。
清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com. gumangan. uecficenterslist">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<service
android:name=".MyFirebaseMessagingService"
android:enabled="true"
android:exported="false">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<!-- Set custom default icon. This is used when no icon is set for incoming notification messages.
<meta-data
android:name="com.google.firebase.messaging.default_notification_icon"
android:resource="@drawable/ic_menu_camera" />
<!-- Set color used with incoming notification messages. This is used when no color is set for the incoming
notification message.
<meta-data
android:name="com.google.firebase.messaging.default_notification_color"
android:resource="@color/colorAccent" />
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
tools:replace="android:theme" />
<activity
android:name=".MenuActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".CentersActivity"
android:label="@string/title_activity_hymns"
android:launchMode="singleTop"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data
android:name="android.app.searchable"
android:resource="@xml/searchable" />
</activity>
<activity
android:name=".CentersDetailActivity"
android:parentActivityName=".CentersActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.gumangan.uecficenterslist.CentersActivity" />
</activity>
<activity
android:name=".YouTubeActivity"
android:label="@string/title_activity_web"
android:theme="@style/AppTheme.NoActionBar"></activity>
<activity
android:name=".AboutActivity"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".AffiliateActivity"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".TermsActivity"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".WarningActivity"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".ShareActivity"
android:label="@string/title_activity_share"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".SupportActivity"
android:label="@string/title_activity_support"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".SubmitActivity"
android:label="@string/title_activity_submit"
android:theme="@style/AppTheme.NoActionBar">
</activity>
</application>
</manifest>
依赖
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'io.fabric'
android {
/* TODO: Don't forget to change versionCode and versionName when updating for final building */
compileSdkVersion 28
defaultConfig {
applicationId "com. gumangan. uecficenterslist"
minSdkVersion 16
targetSdkVersion 28
versionCode 8
versionName "1.7"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
vectorDrawables.useSupportLibrary = true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.android.support:customtabs:28.0.0'
implementation 'com.android.support:support-core-utils:28.0.0'
implementation 'com.intuit.sdp:sdp-android:1.0.5'
implementation 'com.intuit.ssp:ssp-android:1.0.5'
implementation 'com.google.android.gms:play-services-ads:17.2.1'
implementation 'com.google.firebase:firebase-core:16.0.9'
implementation 'com.google.firebase:firebase-ads:17.2.1'
implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
implementation 'com.google.firebase:firebase-messaging:18.0.0'
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'
}
apply plugin: 'com.google.gms.google-services'
MyFirebaseMessagingService.kt
package com.gumangan.uecficenterslist
import android.util.Log
import com.google.firebase.messaging.FirebaseMessagingService
import com.google.firebase.messaging.RemoteMessage
import com.gumangan.uecficenterslist.CentersActivity.Companion.TAG
class MyFirebaseMessagingService : FirebaseMessagingService() {
override fun onMessageReceived(remoteMessage: RemoteMessage?) {
// ...
// TODO(developer): Handle FCM messages here.
// Not getting messages here? See why this may be:
Log.d(TAG, "From: ${remoteMessage?.from}")
// Check if message contains a data payload.
remoteMessage?.data?.isNotEmpty()?.let {
Log.d(TAG, "Message data payload: " + remoteMessage.data)
if (/* Check if data needs to be processed by long running job */ true) {
// For long-running tasks (10 seconds or more) use WorkManager.
scheduleJob()
} else {
// Handle message within 10 seconds
handleNow()
}
}
// Check if message contains a notification payload.
remoteMessage?.notification?.let {
Log.d(TAG, "Message Notification Body: ${it.body}")
}
// Also if you intend on generating your own notifications as a result of a received FCM
// message, here is where that should be initiated. See sendNotification method below.
}
private fun handleNow(): Any {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
private fun scheduleJob(): Any {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
/**
* Called if InstanceID token is updated. This may occur if the security of
* the previous token had been compromised. Note that this is called when the InstanceID token
* is initially generated so this is where you would retrieve the token.
*/
override fun onNewToken(token: String?) {
Log.d(TAG, "Refreshed token: $token")
// If you want to send messages to this application instance or
// manage this apps subscriptions on the server side, send the
// Instance ID token to your app server.
sendRegistrationToServer(token)
}
private fun sendRegistrationToServer(token: String?) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
}
好吧，该应用程序在杀死和后台时接收通知，但在前台接收通知时崩溃。
V/FA: Connection attempt already in progress
E/AndroidRuntime: FATAL EXCEPTION: Firebase-MyFirebaseMessagingService
Process: com.gumangan.uecficenterslist, PID: 15201
kotlin.NotImplementedError: An operation is not implemented: not implemented
at com.gumangan.uecficenterslist.MyFirebaseMessagingService.scheduleJob(MyFirebaseMessagingService.kt:44)
at com.gumangan.uecficenterslist.MyFirebaseMessagingService.onMessageReceived(MyFirebaseMessagingService.kt:23)
at com.google.firebase.messaging.FirebaseMessagingService.zzd(Unknown Source)
at com.google.firebase.iid.zzb.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source)
at java.lang.Thread.run(Thread.java:761)
只需删除
TODO("not implemented")
TODO(...) 是 Kotlin 函数，它总是抛出 NotImplementError。如果您想使用 TODO 标记某些内容但不抛出异常 - 只需将 TODO 与注释一起使用：
希望这有帮助!!
根据 Mohit 的答案，删除 TODO(...) 并从函数声明中删除返回类型 ：Any。
例如，替换下面的函数，
private fun scheduleJob(): Any {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
跟
private fun scheduleJob() {
// TODO : "not implemented"
}