android studio firebase / cloud messaging

Question

每次我编译这两个错误时都会出现。 任何形式的帮助将不胜感激。

1. " 实现 'com.google.firebase：firebase-messaging：17.3.1' ">

2. " 错误： 包 com.google.android.gms.gcm 不存在 ">

以下是我的 gradle 和清单文件。

格拉德尔项目

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.4'
classpath 'com.google.gms:google-services:4.1.0'

// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
maven{
url "https://maven.google.com"
}
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}

应用格拉德尔

apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
applicationId "com.lrtapp.ardentmap"
minSdkVersion 16
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.firebase:firebase-messaging:17.3.1'
testImplementation 'junit:junit:4.12'
implementation 'com.google.firebase:firebase-core:16.0.3'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'me.biubiubiu.justifytext:library:1.1'
//Google Play Services
//implementation 'com.google.android.gms:play-services:11.4.0'
implementation 'com.google.android.gms:play-services-maps:15.0.1'
implementation 'com.google.android.gms:play-services-location:15.0.1'
}
apply plugin: 'com.google.gms.google-services'

清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.lrtapp.ardentmap">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@drawable/erlogo"
android:label="EaseRoute"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="AIzaSyALC_Pis5w391INiqcvnXO7dipxuMP0-JA" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MapActivity" />
<activity android:name=".About" />
<activity android:name=".Contact" />
<activity android:name=".Videos"></activity>
<service android:name=".FirebaseMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT"/>
</intent-filter>
</service>
<service android:name=".MyFirebaseIdService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
</intent-filter>
</service>

<meta-data
android:name="com.google.firebase.messaging.default_notification_color"
android:resource="@color/colorAccent"/>
</application>
</manifest>

提前感谢那些会提供帮助的人！！

Answer 1

1( 不确定您的错误是什么，但您的 Firebase 依赖项必须为同一版本。您使用 17.3.1 进行 firebase 消息传递，但 firebase-core 是 16.0.3。

2(您尚未在gradle中添加GCM依赖项：

implementation 'com.google.android.gms:play-services-gcm:15.0.1'

但最重要的是，为什么要在同一应用中实现 Firebase 消息传递和 GCM？谷歌强烈建议您不要这样做。此外，GCM将于2019年4月关闭。