error: Can't resolve symbol 'AdRequest' and 'AdView'

Question

我正在尝试添加来自 AdMob 的横幅广告。

dependencies {
        .......
        compile 'com.google.firebase:firebase-ads:9.6.0'
    }

...

apply plugin: 'com.google.gms.google-services'

已验证应用级别 build.gradle

<string name="banner_ad_unit_id">ca-app-pub-MY_ID</string>

将我的广告单元 ID 添加到 strings.xml

<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>

将我的广告放置在相对布局中还将 xmlns:ads="http://schemas.android.com/apk/res-auto" 添加到我的 relativelayout

在MainActivity.java

import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;

public class MainActivity extends ActionBarActivity {

...

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    MobileAds.initialize(getApplicationContext(), "ca-app-pub-MY_ID");

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

尽管如此，我已经导入了 import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.AdView; 仍然无法解决 AdRequest 和 AdView 错误。

我也试过清理项目并再次下载 gradles。

Answer 1

解决了问题

go to File > Project Structure > Dependencies

add google-play-services and google-play-ads

Answer 2

转到文件 > 项目结构> 广告 > 并启用 Admob 中显示的复选框。单击确定按钮它对我有用.........

Answer 3

将 gradle 上 play-services-ads 的版本号更改为广告设置页面（文件->项目结构->广告）中的相同版本号。就这样我的android工作室终于解决了AdRequest和AdView.

Answer 4

导入上面这一行导入 com.google.android.gms.ads.InterstitialAd

error: Can't resolve symbol 'AdRequest' and 'AdView'

error: Can't resolve symbol 'AdRequest' and 'AdView'

android

admob

firebase