I'm trying to use MoPub using AdMob mediation. I've followed all instructions at https://developers.google.com/admob/android/mediation/mopub.
Currently I use facebook, applovin, inmobi through admob mediation and all of them work well. I integrated MoPub several times but it always says manifest not found. The problem is in step 3 https://developers.google.com/admob/android/mediation/mopub#step_3_import_the_mopub_sdk_and_adapter.
Note: I'm using androidX.
when testing I see this. I used admob mediation test suite and found like this. 
Here is my app-level build.gradle
apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 30
buildToolsVersion '30.0.1'
defaultConfig {
applicationId 'com.theaccidentalmedico.sociology'
minSdkVersion 21
targetSdkVersion 30
versionCode 1
versionName "1.0.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
debug {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
release {
shrinkResources true
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
lintOptions {
disable 'MissingTranslation'
}
productFlavors {
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
repositories {
google()
jcenter()
maven {
url "https://s3.amazonaws.com/moat-sdk-builds"}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
androidTestImplementation('androidx.test.espresso:espresso-core:3.2.0', {
exclude group: 'com.android.support', module: 'support-annotations'
})
implementation 'com.google.firebase:firebase-analytics:17.4.4'
implementation 'com.google.android.gms:play-services-ads:19.2.0'
implementation 'com.google.ads.mediation:facebook:5.9.0.0'
implementation 'com.google.ads.mediation:mopub:5.13.1.0'
implementation 'com.codemybrainsout.rating:ratingdialog:1.0.8'
implementation 'com.google.ads.mediation:applovin:9.13.0.0'
implementation 'com.google.android.ads:mediation-test-suite:1.3.0'
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'com.google.android.material:material:1.1.0'
testImplementation 'junit:junit:4.13'
}
Here is my project level build.gradle.
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.6.4'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
classpath 'com.google.gms:google-services:4.3.3'
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
I'm using AndroidX. Here is my gradle.properties file
# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
android.enableJetifier=true
android.useAndroidX=true
org.gradle.jvmargs=-Xmx1536m
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true
In admob implementation guide no instruction is given to edit androidmanifest.xml file. Here's my androidmanifest.xml file.
<?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.theaccidentalmedico.sociology">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:networkSecurityConfig="@xml/network_security_config"
android:icon="@mipmap/ic_launcher_foreground"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppThemeDefault"
tools:targetApi="n">
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="ca-app-pub-8803330956819211~8267554096"/>
<activity
android:name="com.theaccidentalmedico.sociology.MainTabActivity"
android:configChanges="orientation|keyboardHidden|navigation|screenSize"
android:windowSoftInputMode="adjustPan|adjustResize"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.theaccidentalmedico.sociology.MainActivity"
android:configChanges="orientation|keyboardHidden|navigation|screenSize" />
<activity
android:name="com.theaccidentalmedico.sociology.MeaningActivity"
android:label="@string/title_meaning_activity" />
<activity android:name="com.theaccidentalmedico.sociology.FavoriteActivity" />
<activity android:name="com.theaccidentalmedico.sociology.SettingActivity" />
<activity android:name="com.theaccidentalmedico.sociology.HistoryActivity"/>
</application>
</manifest>
