得到广告回应。错误代码：1

我正在设备中测试我的应用程序，它在调试logcat中显示错误，这是什么错误以及如何解决此错误？

I am testing my application in device it is showing the error in debug logcat what is this error and how to solve this?

错误是

There was a problem getting an ad response. ErrorCode: 1

我的xml代码是

<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"
    android:background="@color/accent_material_light"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"

     >
      <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="@string/banner_ad_unit_id">
    </com.google.android.gms.ads.AdView>

我显示广告的代码是

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

在清单文件中添加代码。代码运行正常，但广告没有显示在我的设备上对其进行测试

and in manifest file I am adding.the code is working fine but the ads are not displaying I am testing it on my device

<application
        android:allowBackup="true"
        android:icon="@drawable/icon"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
         <!--This meta-data tag is required to use Google Play Services.-->
        <meta-data android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
<activity android:name="com.google.android.gms.ads.AdActivity"
                android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
                android:theme="@android:style/Theme.Translucent" />