无法在Android Studio 2.3.3中解析“com.google.firebase:firebase messaging:11.0.4”

我也遇到了同样的问题,我通过更新两件事来解决它

1. Google play服务

简先生,请点击下面的链接,它清楚地表明->

https://firebase.google.com/docs/android/setup#Prerequisites

先决条件-

• Google Repository中的Google Play services SDK,可在Android SDK管理器中获得
• Android Studio的最新版本,1.5或更高版本

Google Play服务和Google Repository 在SDK管理器中

打开Android studio>转到文件(>);设置(>);外观和行为;系统设置>Android SDK>SDK工具>使现代化

Google Play服务

2- 谷歌知识库 在下面

正如Dileep在文档中提到的,您需要安装Google Play Services 11.0.4或更高版本。

然后是Android SDK(在左侧菜单上)

这为我解决了问题。

Firebase 它会自动将编译依赖项添加到项目中。我也这么做了,解决了我的问题。

应该是这样的:

dependencies {
    classpath 'com.android.tools.build:gradle:3.1.1'

    classpath 'com.google.gms:google-services:3.1.1' // ADD this
}

附录:(11.8.0)

implementation 'com.google.firebase:firebase-messaging:11.8.0' // ADD this

如果上述任何解决方案不起作用,Un-Tick Offline Gradle Build将解决此问题

顶层 build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.1.1"
        classpath 'com.google.gms:google-services:4.3.4'
    }
}    
allprojects {
    repositories {
        google()
        jcenter()
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

应用程序级别

plugins {
    id 'com.android.application'
    id 'com.google.gms.google-services'
}
//Top code is same as= apply plugin: 'com.android.application'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.0"

    defaultConfig {
        applicationId "com.gc.pushnotificationssampleapp2"
        minSdkVersion 24
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

    //Start of unique libs for this project:
    implementation 'com.google.firebase:firebase-messaging:20.0.1'
}

确保你的应用程序已在Firebase中注册。所以你应该有一个 google-services.json

"client_info": {
  "mobilesdk_app_id": "1:551460864994:android:c0310a960a3afb06df2fbb",
  "android_client_info": {
    "package_name": "com.gc.pushnotificationssampleapp2"
  }

<uses-permission android:name="android.permission.INTERNET"></uses-permission>
. . . 
<service
    android:name=".FirebaseMessagingService">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT"/>
    </intent-filter>
</service>

Gradle版本、firebase服务版本和google play服务版本在使用时应相同。例如,你不能在firebase core 16.x中使用gradle 2.x。

Android Studio在文件构建中暗示了这一点。项目的梯度

加载项渐变

 Dependencies{
    
     // for the Firebase
        implementation platform('com.google.firebase:firebase-bom:26.5.0')
        implementation 'com.google.firebase:firebase-core:16.0.1'
        implementation 'com.google.firebase:firebase-messaging:20.1.3'
         implementation 'com.google.firebase:firebase-analytics:17.2.3'
    
    
    
    }
    
    apply plugin: 'com.google.gms.google-services'

和加载项清单

 <application>

     <service android:name=".util.FirebaseMessageReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>


    </application>

这是自定义布局

    package com.---------.app.util;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.widget.RemoteViews;

import androidx.core.app.NotificationCompat;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.pisel.app.MainActivity;
import com.pisel.app.R;

public class FirebaseMessageReceiver
        extends FirebaseMessagingService {

    // Override onMessageReceived() method to extract the
    // title and
    // body from the message passed in FCM
    @Override
    public void
    onMessageReceived(RemoteMessage remoteMessage) {
        // First case when notifications are received via
        // data event
        // Here, 'title' and 'message' are the assumed names
        // of JSON
        // attributes. Since here we do not have any data
        // payload, This section is commented out. It is
        // here only for reference purposes.
        /*if(remoteMessage.getData().size()>0){
            showNotification(remoteMessage.getData().get("title"),
                          remoteMessage.getData().get("message"));
        }*/

        // Second case when notification payload is
        // received.
        if (remoteMessage.getNotification() != null) {
            // Since the notification is received directly from
            // FCM, the title and the body can be fetched
            // directly as below.
            showNotification(
                    remoteMessage.getNotification().getTitle(),
                    remoteMessage.getNotification().getBody());
        }
    }

    // Method to get the custom Design for the display of
    // notification.
    private RemoteViews getCustomDesign(String title,
                                        String message) {
        RemoteViews remoteViews = new RemoteViews(
                getApplicationContext().getPackageName(),
                R.layout.notification);
        remoteViews.setTextViewText(R.id.title, title);
        remoteViews.setTextViewText(R.id.message, message);
        remoteViews.setImageViewResource(R.id.icon,
                R.drawable.flag_belarus);
        return remoteViews;
    }

    // Method to display the notifications
    public void showNotification(String title,
                                 String message) {
        // Pass the intent to switch to the MainActivity
        Intent intent
                = new Intent(this, MainActivity.class);
        // Assign channel ID
        String channel_id = "notification_channel";
        // Here FLAG_ACTIVITY_CLEAR_TOP flag is set to clear
        // the activities present in the activity stack,
        // on the top of the Activity that is to be launched
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        // Pass the intent to PendingIntent to start the
        // next Activity
        PendingIntent pendingIntent
                = PendingIntent.getActivity(
                this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        // Create a Builder object using NotificationCompat
        // class. This will allow control over all the flags
        NotificationCompat.Builder builder
                = new NotificationCompat
                .Builder(getApplicationContext(),
                channel_id)
                .setSmallIcon(R.drawable.flag_india)
                .setAutoCancel(true)
                .setVibrate(new long[]{1000, 1000, 1000,
                        1000, 1000})
                .setOnlyAlertOnce(true)
                .setContentIntent(pendingIntent);

        // A customized design for the notification can be
        // set only for Android versions 4.1 and above. Thus
        // condition for the same is checked here.
        if (Build.VERSION.SDK_INT
                >= Build.VERSION_CODES.JELLY_BEAN) {
            builder = builder.setContent(
                    getCustomDesign(title, message));
        } // If Android Version is lower than Jelly Beans,
        // customized layout cannot be used and thus the
        // layout is set as follows
        else {
            builder = builder.setContentTitle(title)
                    .setContentText(message)
                    .setSmallIcon(R.drawable.flag_british_indian_ocean_territory);
        }
        // Create an object of NotificationManager class to
        // notify the
        // user of events that happen in the background.
        NotificationManager notificationManager
                = (NotificationManager) getSystemService(
                Context.NOTIFICATION_SERVICE);
        // Check if the Android Version is greater than Oreo
        if (Build.VERSION.SDK_INT
                >= Build.VERSION_CODES.O) {
            NotificationChannel notificationChannel
                    = new NotificationChannel(
                    channel_id, "web_app",
                    NotificationManager.IMPORTANCE_HIGH);
            notificationManager.createNotificationChannel(
                    notificationChannel);
        }

        notificationManager.notify(0, builder.build());
    }
}

创建通知设计布局

  <!-- Parent Layout of ImageView -->
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <!--Image to be displayed beside the notification text-->
        <ImageView
            android:id="@+id/icon"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:padding="5dp"
            android:src="@drawable/flag_benin" />
    </LinearLayout>

    <!-- Parent layout for holding the Title and the Body-->
    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical"
        android:padding="5dp">

        <!-- TextView for Title -->
        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Title"
            android:textColor="#000"
            android:textStyle="bold" />

        <!-- TextView for Body -->
        <TextView
            android:id="@+id/message"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Message"
            android:textSize="15sp" />

    </LinearLayout>

</LinearLayout>

适用于使用firebase bom的用户

implementation platform('com.google.firebase:firebase-bom:29.0.1')
// Firebase Cloud Messaging (Java)
    implementation 'com.google.firebase:firebase-messaging'

    // Firebase Cloud Messaging (Kotlin)
    implementation 'com.google.firebase:firebase-messaging-ktx'

    // For an optimal experience using FCM, add the Firebase SDK
    // for Google Analytics. This is recommended, but not required.
    implementation 'com.google.firebase:firebase-analytics'

我也有同样的问题。后来发现我完全是从firebase文档中复制了这一行。

应该是这样的

classpath 'com.google.gms:google-services:3.1.1'

带小写字母“c”。

愚蠢的错误,但很容易被忽视。

我也有同样的问题,我只是把版本从 11.0.4 到 10.0.1 错误消失了。试试看,可能会有帮助。