晚安！
我尝试将AdMob放入我的项目中，但它只适用于API级别21或22，当我更改API的预览时间少于21时，我有一个空指针异常，如果我尝试编译并安装在Android 2 3或Android 4 0的设备上，广告不会出现，并且调试时会抛出空指针异常。
我使用Android Studio 1 2 2更新了SDK包。
吼错误：
The following classes could not be instantiated:
-com.google.android.gms.ads.AdView
完全例外
java.lang.NullPointerException
at android.os.Handler.<init>(Handler.java:157)
at com.google.android.gms.ads.internal.util.client.zza.<clinit>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzk.<init>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzk.<clinit>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzy.<init>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzy.<init>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzy.<init>(Unknown Source)
at com.google.android.gms.ads.AdView.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:413)
at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:105)
at com.android.tools.idea.rendering.LayoutlibCallback.loadView(LayoutlibCallback.java:177)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:206)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:131)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:739)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:711)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:372)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:369)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:326)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:497)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:485)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:894)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:485)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:590)
at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:480)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Build Gradle应用文件
apply plugin: 'com.android.application'
android {
compileSdkVersion 22
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "br.com.cinova.procuradominio"
minSdkVersion 10
targetSdkVersion 22
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.0'
compile 'com.google.android.gms:play-services:7.5.0'
compile 'com.android.support:support-v4:22.2.0'
}
和Manifest应用程序标记
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:logo="@mipmap/ic_launcher"
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=".ActivityPrincipal"
android:configChanges="orientation"
android:icon="@drawable/icone"
android:label="@string/app_name"
android:screenOrientation="portrait" >
</activity>
<activity
android:name=".SplashScreenActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:logo="@mipmap/ic_launcher"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ResultadoActivity"
android:configChanges="orientation"
android:icon="@drawable/icone"
android:label="@string/title_activity_resultado"
android:screenOrientation="portrait" >
</activity>
<!-- Include the AdActivity configChanges and theme. -->
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="@android:style/Theme.Translucent" />
<activity
android:name=".ActivityConfiguracoes"
android:label="@string/title_activity_activity_configuracoes" >
</activity>
</application>
活动广告标记：
<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>
我尝试了几件事，但没有任何作用
有人有想法吗？
由于
答案 0 :(得分：0)
您看到的异常来自您的IntelliJ IDE（即Android Studio）的预览渲染。这绝不可能显示广告。
在真实设备或模拟器上测试。