AdMob无法在真实设备上运行

我已经使用本指南在我的应用中显示AdMob Banner https://firebase.google.com/docs/admob/android/quick-start我的问题是AdMob Banner 广告只显示在我的测试设备上

但在真实设备上我没有看到任何内容我在gradle文件中的依赖关系是：

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

compile 'com.android.support:appcompat-v7:25.1.0'
compile 'com.android.support:design:25.1.0'
compile 'de.hdodenhof:circleimageview:1.3.0'
compile 'com.android.support:support-v4:25.1.0'

compile 'com.google.firebase:firebase-core:10.0.1'
compile 'com.google.firebase:firebase-ads:10.0.1'

compile 'com.google.android.gms:play-services:10.0.1'

compile 'com.android.support:multidex:1.0.1'
testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'

这是我的代码：

MobileAds.initialize(getContext(), "ca-app-pub-****");
AdRequest request = new AdRequest.Builder()
            .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
            .addTestDevice("4F8D70E24813A8C1CFF9B07A47A4F484")
            .setRequestAgent("android_studio:ad_template")
            .build();
    mAdView.loadAd(request);

这是我的xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.saffru.colombo.navigationdrawervideotutorial.MainFragment">

<!-- TODO: Update blank fragment layout -->

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="@string/l_apos_onomastico_di_oggi"
    android:id="@+id/textView2"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="100dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="@string/xxx"
    android:id="@+id/textView3"
    android:textColor="@color/verde1"
    android:layout_below="@+id/textView2"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="46dp" />

<com.google.android.gms.ads.AdView
    android:id="@+id/adView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_alignParentBottom="true"
    ads:adSize="BANNER"
    ads:adUnitId="ca-app-pub-****">
</com.google.android.gms.ads.AdView>


</RelativeLayout>

它不起作用 .

这是我的应用的截图

.

我的代码是

MobileAds.initialize(getContext(), "ca-app-pub-6864438797370510/3840785983");

AdView mAdView = (AdView) view.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);

在我的AdMob帐户中，我看到了

如果我添加.addTestDevice（“***”）我的logcat是

02-19 22:07:28.379 2762-2762/com.saffru.colombo.onomastici2 W/System: 
ClassLoader referenced unknown path: 
/data/user/0/com.google.android.gms/app_chimera/m/0000000e/n/armeabi-v7a
02-19 22:07:28.380 2762-2762/com.saffru.colombo.onomastici2 W/System: 
ClassLoader referenced unknown path: 
/data/user/0/com.google.android.gms/app_chimera/m/0000000e/n/armeabi
02-19 22:07:28.392 2762-2762/com.saffru.colombo.onomastici2 
I/FirebaseCrashApiImpl: FirebaseCrashApiImpl created by ClassLoader 
p[DexPathList[[zip file"
/data/data/com.google.android.gms/app_chimera/m/0000000e/
DynamiteModulesC_GmsCore_prodmnc_xxhdpi_release.apk"],
nativeLibraryDirectories[/data/user/0/com.google.android.gms/
app_chimera/m/0000000e/n/armeabi-v7a, 
/data/user/0/com.google.android.gms/app_chimera/m/0000000e/n/armeabi, 
/vendor/lib, /system/lib]]]
02-19 22:07:29.145 2762-2762/com.saffru.colombo.onomastici2 W/System: 
ClassLoader referenced unknown path: 
/data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi
02-19 22:07:29.230 2762-2878/com.saffru.colombo.onomastici2 W/System: 
ClassLoader referenced unknown path:
/data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi
02-19 22:07:29.295 2762-2888/com.saffru.colombo.onomastici2 D/OpenGLRenderer: 
Use EGL_SWAP_BEHAVIOR_PRESERVED: true