以下类找不到： - com.google.android.gms.ads.AdView

Question

我得到这个错误：

The following classes could not be found:
- com.google.android.gms.ads.AdView

我已经更新了谷歌Play服务37版和谷歌库到版本38

也在我的MainActivity类中我的OnCreate()方法中，我得到了Cannot resolve symbol 'MobileAds'错误。我知道这是由于缺少导入导致的，但我没有提供导入类。

MobileAds.initialize(getApplicationContext(), "ca-app-pub-3940256099942544~3347511713"); 

XML文件：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:ads="http://schemas.android.com/apk/lib/com.example.gateway.myapp" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:padding="5dp" 
    tools:context="com.example.gateway.myapp.Class" 
    android:orientation="vertical"> 
    <com.google.android.gms.ads.AdView 
     android:id="@+id/adView" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     ads:adSize="BANNER" 
     ads:adUnitId="@string/banner_ad_unit_id"> 
    </com.google.android.gms.ads.AdView> 
</LinearLayout> 

build.gradle（模块）：

apply plugin: 'com.android.application' 
android { 
    compileSdkVersion 23 
    buildToolsVersion "23.0.3" 

    defaultConfig { 
     applicationId "com.example.gateway.myapp" 
     minSdkVersion 9 
     targetSdkVersion 23 
     versionCode 1 
     versionName "1.0" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    testCompile 'junit:junit:4.12' 
    compile 'com.android.support:appcompat-v7:23.4.0' 
    compile 'com.android.support:design:23.4.0' 
    compile 'com.google.firebase:firebase-core:9.8.0' 
} 
apply plugin: 'com.google.gms.google-services' 

build.gradle（项目）：

// Top-level build file where you can add configuration options common to all sub-projects/modules. 

buildscript { 
    repositories { 
     jcenter() 
    } 
    dependencies { 
     classpath 'com.android.tools.build:gradle:2.2.2' 
     classpath 'com.google.gms:google-services:3.0.0' 
     // NOTE: Do not place your application dependencies here; they belong 
     // in the individual module build.gradle files 
    } 
} 

allprojects { 
    repositories { 
     jcenter() 
    } 
} 

task clean(type: Delete) { 
    delete rootProject.buildDir 
} 

Answer 1

在你gradle这个文件中添加com.google。火力：FI重订的广告

dependencies { 
     compile fileTree(dir: 'libs', include: ['*.jar']) 

     compile 'com.google.firebase:firebase-ads:9.8.0' 
    } 

谷歌更新（包括火力地堡和SDK）移动广告在现在Google Mobile Ads SDK

Answer 2

Admobs 火力地堡 SDK和谷歌移动广告由谷歌玩services.It交付的一部分，不再可用在独立的SDK中。

Reference link和Migrate from the Google project.