android - AdRequest.Builder 无法解析为类型

Question

我正在将 AdMob 整合到我的应用中。我已经按照开发人员页面中的步骤进行操作。然而 AdRequest.Builder() 被标上了红色下划线，它说:

AdRequest cannot be resolved to a type

和

AdRequest.Builder cannot be resolved to a type.

可能是什么问题？

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


public class FireRoomActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fire_room);

        // Look up the AdView as a resource and load a request.
        AdView adView = (AdView)this.findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();   
        adView.loadAd(adRequest);
    }

我在 xml 中显示了 admob:

<com.google.android.gms.ads.AdView android:id="@+id/adView"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     ads:adUnitId="bla bla"
                     ads:adSize="BANNER"/>

Answer 1

您的代码是 Admob SDK (Google Play) 的混合代码和 Android (6.4.1 and earlier SDKs)

使用

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

AdRequest adRequest = new AdRequest.Builder().build();

和

<com.google.android.gms.ads.AdView android:id="@+id/adView"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     ads:adUnitId="bla bla"
                     ads:adSize="BANNER"/>

如果您使用 Admob SDK (Google Play)

或者使用

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

AdRequest adRequest = new AdRequest();

和

<com.google.ads.AdView android:id="@+id/adView"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     ads:adUnitId="bla bla"
                     ads:adSize="BANNER"/>

如果你使用早期的SDK

对于 Admob SDK (Google Play) 不要忘记更改 namespace

xmlns:ads="http://schemas.android.com/apk/res-auto"