Question

可能重复：
admob 6.2.1 nullpointer exception

如果我想在广告布局中添加广告横幅，则只会显示此错误。

java.lang.NullPointerException
Exception details are logged in Window > Show View > Error Log

java.lang.NullPointerException
    at com.google.ads.AdView.onMeasure(SourceFile:670)
    at android.view.View.measure(View.java:15513)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827)
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
    at android.view.View.measure(View.java:15513)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827)
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
    at android.view.View.measure(View.java:15513)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827)
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
    at android.view.View.measure(View.java:15513)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827)
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
    at android.view.View.measure(View.java:15513)

这是我的xml文件代码。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/bGoBack"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="GO BACK" />

    <Button
        android:id="@+id/bRefresh"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="40dp"
        android:text="REFRESH" />

    <Button
        android:id="@+id/bForward"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="48dp"
        android:text="GO FORWARD" />

    <WebView
        android:id="@+id/webView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="40dp" />

    <com.google.ads.AdView android:id="@+id/adView" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        ads:adSize="BANNER"
        ads:adUnitId="can't show my publisher id"
        ads:loadAdOnCreate="true"
    />


</LinearLayout>

如果我删除了负责显示xml文件中的广告的代码，则错误消失。

<com.google.ads.AdView android:id="@+id/adView" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            ads:adSize="BANNER"
            ads:adUnitId="can't show my publisher id"
            ads:loadAdOnCreate="true"
        />

我无法解决错误，我希望有经验的人可以指出问题所在。谢谢！

Answer 1

我遇到了这个问题，然后我从xml文件中删除了adview布局，并在那里放置了一个简单的线性布局，并通过我的activity中的代码动态附加了adview。它解决了这个问题。这段代码可以帮到你 -

AdView adView = new AdView(this, AdSize.BANNER, MY_AD_UNIT_ID);
LinearLayout layout = (LinearLayout)findViewById(R.id.mainLayout);//your linear layout
layout.addView(adView);// Add the adView to it
adView.loadAd(new AdRequest());

Android java.lang.NullPointerException错误

1 个答案: