srcmini在本教程中, 我们在Android应用程序中实施Google AdMob插页式广告。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。
插页式广告是覆盖整个活动布局的全屏广告。该广告显示在活动的过渡点。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插页式广告。
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.google.android.gms:play-services-ads:17.0.0'
testImplementation 'junit:junit:4.12'
}activity_main.xml
将你的UI代码添加到activity_main.xml中。 Button组件用于加载广告。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="example.srcmini02.com.kotlininterstitialads.MainActivity">
<!-- view for AdMob Interstitial Ad -->
<TextView
android:id="@+id/app_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="@string/interstitial_ad_sample"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/load_ad_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/load_ad" />
</RelativeLayout>strings.xml
在string.xml文件中添加创建的广告单元ID。
<resources>
<string name="app_name">KotlinInterstitialAds</string>
<string name="action_settings">Settings</string>
<string name="interstitial_ad_sample">Interstitial Ad Sample</string>
<string name="load_ad">Load Ad</string>
<!-- -
This is an ad unit ID for an interstitial test ad. Replace with your own interstitial ad unit id.
-->
<string name="interstitial_ad_unit_id">ca-app-pub-3940256099942544/1033173712</string>
</resources>MainActivity.kt
在MainActivity.kt类中添加以下代码。要将广告加载到UI上, 请创建InterstitialAd实例, 然后在InterstitialAd interstitialAd.adUnitId = getString（R.string.interstitial_ad_unit_id）上初始化广告单元ID。
覆盖InterstitialAd监听器onAdLoaded(), onAdFailedToLoad(), onAdClosed。要在点击按钮时加载广告, 请创建AdRequest实例, 然后通过调用InterstitialAd !!。loadAd（AdRequest）加载广告。
package example.srcmini02.com.kotlininterstitialads
import com.google.android.gms.ads.AdListener
import com.google.android.gms.ads.AdRequest
import com.google.android.gms.ads.InterstitialAd
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.widget.Button
import android.widget.Toast
class MainActivity : AppCompatActivity() {
private var mLoadAdButton: Button? = null
private var mInterstitialAd: InterstitialAd? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Create the InterstitialAd and set the adUnitId (defined in values/strings.xml).
mInterstitialAd = newInterstitialAd()
loadInterstitial()
// Create the load ad button, tries to show an interstitial when clicked.
mLoadAdButton = findViewById(R.id.load_ad_button) as Button
mLoadAdButton!!.isEnabled = false
mLoadAdButton!!.setOnClickListener {
showInterstitial()
}
}
private fun newInterstitialAd(): InterstitialAd {
val interstitialAd = InterstitialAd(this)
interstitialAd.adUnitId = getString(R.string.interstitial_ad_unit_id)
interstitialAd.adListener = object : AdListener() {
override fun onAdLoaded() {
mLoadAdButton!!.isEnabled = true
Toast.makeText(applicationContext, "Ad Loaded", Toast.LENGTH_SHORT).show()
}
override fun onAdFailedToLoad(errorCode: Int) {
mLoadAdButton!!.isEnabled = true
Toast.makeText(applicationContext, "Ad Failed To Load", Toast.LENGTH_SHORT).show()
}
override fun onAdClosed() {
// Proceed to the next level.
// goToNextLevel()
Toast.makeText(applicationContext, "Ad Closed", Toast.LENGTH_SHORT).show()
tryToLoadAdOnceAgain()
}
}
return interstitialAd
}
private fun loadInterstitial() {
// Disable the load ad button and load the ad.
mLoadAdButton!!.isEnabled = false
val adRequest = AdRequest.Builder().build()
mInterstitialAd!!.loadAd(adRequest)
}
private fun showInterstitial() {
// Show the ad if it is ready. Otherwise toast and reload the ad.
if (mInterstitialAd != null && mInterstitialAd!!.isLoaded) {
mInterstitialAd!!.show()
} else {
Toast.makeText(this, "Ad did not load", Toast.LENGTH_SHORT).show()
tryToLoadAdOnceAgain()
}
}
private fun tryToLoadAdOnceAgain() {
mInterstitialAd = newInterstitialAd()
loadInterstitial()
}
}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.kotlininterstitialads">
<!-- 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"> <!-- 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=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</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" />
<meta-data
android:name="com.google.android.gms.ads.AD_MANAGER_APP"
android:value="true"/>
</application>
</manifest>输出：
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