在本教程中, 我们在Android应用程序中实施Google AdMob标语广告。要将Google AdMob放置在Android应用程序中, 我们需要创建Google广告单元ID。有关创建Google AdMod帐户和生成广告单元ID的完整参考, 请参见Android Google AdMob。
横幅广告是矩形文字或图像广告, 在活动布局中占据一小部分。要在Android应用程序中实现Google AdMob, 请选择Google AdMob广告活动, 然后将广告格式类型选择为横幅。此活动将添加默认的必需库依赖项, “广告视图”显示, Internet权限以及其他必需的代码。
我们还可以将Google AdMob广告放置在其他活动(例如空白活动)上。
在build.gradle文件中添加Google广告依赖项“ com.google.android.gms:play-services-ads:17.0.0”:
build.gradle
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.android.gms:play-services-ads:17.0.0'
testImplementation 'junit:junit:4.12'
}
activity_main.xml
在我们要在其中展示广告的布局上添加Google Ads视图。在这里, 我们已经添加了activity_main.xml文件。
要显示横幅广告, 我们需要将com.google.android.gms.ads.AdView元素添加到XML布局中。横幅广告与屏幕底部对齐。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="example.srcmini02.com.kotlinbannerads.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="215dp"
android:text="@string/banner_ad_sample"
android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"/>
<!-- view for AdMob Banner Ad -->
<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
ads:adSize="BANNER"
ads:adUnitId="@string/banner_ad_unit_id" />
</RelativeLayout>
strings.xml
在string.xml文件中添加创建的广告单元ID。
<resources>
<string name="app_name">Kotlin Banner Ads</string>
<string name="banner_ad_sample">Banner Ad Sample</string>
<!-- -
This is an ad unit ID for a banner test ad. Replace with your own banner ad unit id.
-->
<string name="banner_ad_unit_id">ca-app-pub-3940256099942544/6300978111</string>
<!-- <string name="title_activity_banner">BannerActivity</string>-->
</resources>
MainActivity.kt
在MainActivity.kt类中添加以下代码。要在用户界面上加载广告, 请创建AdRequest实例, 然后通过调用AdView.loadAd(AdRequest)在AdView中加载广告。
覆盖AdView监听器onAdFailedToLoad(), onAdLoaded(), onAdOpened(), onAdClicked(), onAdClosed()等。
package example.srcmini02.com.kotlinbannerads
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Toast
import com.google.android.gms.ads.AdListener
import com.google.android.gms.ads.AdRequest
import com.google.android.gms.ads.AdView
class MainActivity : AppCompatActivity() {
lateinit var adView : AdView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Load an ad into the AdMob banner view.
adView = findViewById<View>(R.id.adView) as AdView
val adRequest = AdRequest.Builder().build()
adView.loadAd(adRequest)
adView.adListener = object : AdListener(){
override fun onAdFailedToLoad(p0: Int) {
super.onAdFailedToLoad(p0)
val toastMessage: String = "ad fail to load"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
override fun onAdLoaded() {
super.onAdLoaded()
val toastMessage: String = "ad loaded"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
override fun onAdOpened() {
super.onAdOpened()
val toastMessage: String = "ad is open"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
override fun onAdClicked() {
super.onAdClicked()
val toastMessage: String = "ad is clicked"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
override fun onAdClosed() {
super.onAdClosed()
val toastMessage: String = "ad is closed"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
override fun onAdImpression() {
super.onAdImpression()
val toastMessage: String = "ad impression"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
override fun onAdLeftApplication() {
super.onAdLeftApplication()
val toastMessage: String = "ad left application"
Toast.makeText(applicationContext, toastMessage.toString(), Toast.LENGTH_LONG).show()
}
}
}
override fun onPause() {
if (adView!=null) {
adView.pause();
}
super.onPause()
}
override fun onResume() {
super.onResume()
if (adView != null) {
adView.resume();
}
}
override fun onDestroy() {
if (adView != null) {
adView.destroy();
}
super.onDestroy();
}
}
注意:如果你遇到异常java.lang.RuntimeException:无法获取提供程序com.google.android.gms.ads.MobileAdsInitProvider:java.lang.IllegalStateException:然后添加
<meta-data
android:name="com.google.android.gms.ads.AD_MANAGER_APP"
android:value="true"/>
在AndroidManifest文件中。
AndroidManifest.xml
在AndroidManifest.xml文件中添加以下代码
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="example.srcmini02.com.kotlinbannerads">
<!-- Include required permissions for Google Mobile Ads to run. -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- 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" />
<meta-data
android:name="com.google.android.gms.ads.AD_MANAGER_APP"
android:value="true"/>
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="@android:style/Theme.Translucent" />
</application>
</manifest>
输出:
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