java – Android google ads错误(null引用?)
作者:互联网
我实际上在最后24小时陷入此错误仍然无法找到解决方案
错误描述:
11-06 18:53:37.745: E/AndroidRuntime(1698): Caused by:
java.lang.NullPointerException: Attempt to invoke virtual method ‘void
com.google.android.gms.ads.AdView.loadAd(com.google.android.gms.ads.AdRequest)’
on a null object reference
这是一些xml布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background_pattern"
android:orientation="vertical" >
.
.
.
.
.
<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
ads:adSize="SMART_BANNER"
ads:adUnitId="ca-app-pub-xxxxxxx/xxxxxxxx" />
<TextView
android:id="@+id/tv_05"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
mainActivity.java中的oncreate方法:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AdView adview = (AdView) this.findViewById(R.id.adView);
// Request for Ads
AdRequest adRequest = new AdRequest.Builder()
// Add a test device to show Test Ads
.addTestDevice(AdRequest.DEVICE_ID_EMULATOR).addTestDevice("")
.build();
adview.loadAd(adRequest);
// Prepare the Interstitial Ad
interstitial = new InterstitialAd(mainActivity.this);
// Insert the Ad Unit ID
interstitial.setAdUnitId(AppConstants.Interstitial_Id);
// Load ads into Interstitial Ads
interstitial.loadAd(adRequest);
.....
我在这里看不到任何错误我检查了所有导入库一切正常
请帮帮我,我的时间不多了:/
解决方法:
它失败了,因为它没有在您的布局中找到具有id adView的元素.
确保上面显示的XML文件实际上是activity_main.xml.
并做一个干净的构建.
标签:java,android,admob,adview 来源: https://codeday.me/bug/20190528/1168622.html