Bắt đầu sử dụng tiện ích IMA Exoplayer

apply plugin: 'com.android.application'

android {
    namespace 'com.google.ads.interactivemedia.v3.samples.exoplayerexample'
    compileSdk 36

    // Java 17 required by Gradle 8+
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }

    defaultConfig {
        applicationId "com.google.ads.interactivemedia.v3.samples.exoplayerexample"
        minSdkVersion 21
        targetSdkVersion 36
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

repositories {
    google()
    mavenCentral()
}

dependencies {
    def media3_version = "1.8.0"
    implementation "androidx.media3:media3-ui:$media3_version"
    implementation "androidx.media3:media3-exoplayer:$media3_version"

    // The library adds the IMA ExoPlayer integration for ads.
    implementation "androidx.media3:media3-exoplayer-ima:$media3_version"

    implementation 'androidx.multidex:multidex:2.0.1'
}
build.gradle

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MyActivity"
    tools:ignore="MergeRootFrame">

    <androidx.media3.ui.PlayerView
        android:id="@+id/player_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <!-- UI element for viewing SDK event log -->
    <TextView
        android:id="@+id/logText"
        android:gravity="bottom"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:maxLines="100"
        android:scrollbars="vertical"
        android:textSize="@dimen/font_size">
    </TextView>

</LinearLayout>
activity_my.xml

import static android.os.Build.VERSION.SDK_INT;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.widget.TextView;
import androidx.media3.common.MediaItem;
import androidx.media3.datasource.DataSource;
import androidx.media3.datasource.DefaultDataSource;
import androidx.media3.exoplayer.ExoPlayer;
import androidx.media3.exoplayer.ima.ImaAdsLoader;
import androidx.media3.exoplayer.source.DefaultMediaSourceFactory;
import androidx.media3.exoplayer.source.MediaSource;
import androidx.media3.ui.PlayerView;
import androidx.multidex.MultiDex;
import com.google.ads.interactivemedia.v3.api.AdEvent;
import com.google.ads.interactivemedia.v3.api.ImaSdkFactory;
import com.google.ads.interactivemedia.v3.api.ImaSdkSettings;
MyActivity.java

/** Main Activity. */
@SuppressLint("UnsafeOptInUsageError")
/* @SuppressLint is needed for new media3 APIs. */
public class MyActivity extends Activity {

  private static final String SAMPLE_VIDEO_URL =
      "https://storage.googleapis.com/gvabox/media/samples/stock.mp4";
  private static final String SAMPLE_VAST_TAG_URL =
      "https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/"
          + "single_ad_samples&sz=640x480&cust_params=sample_ct%3Dlinear&ciu_szs=300x250%2C728x90"
          + "&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&correlator=";
  private static final String LOG_TAG = "ImaExoPlayerExample";

  private PlayerView playerView;
  private TextView logText;
  private ExoPlayer player;
  private ImaAdsLoader adsLoader;
  private ImaSdkSettings imaSdkSettings;
MyActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_my);
  MultiDex.install(this);

  // Initialize the IMA SDK as early as possible when the app starts. If your app already
  // overrides Application.onCreate(), call this method inside the onCreate() method.
  // https://developer.android.com/topic/performance/vitals/launch-time#app-creation
  ImaSdkFactory.getInstance().initialize(this, getImaSdkSettings());

  playerView = findViewById(R.id.player_view);

  // Create an AdsLoader.
  adsLoader =
      new ImaAdsLoader.Builder(/* context= */ this)
          .setAdEventListener(buildAdEventListener())
          .setImaSdkSettings(getImaSdkSettings())
          .build();
}
MyActivity.java

public AdEvent.AdEventListener buildAdEventListener() {
  logText = findViewById(R.id.logText);
  logText.setMovementMethod(new ScrollingMovementMethod());

  return event -> {
    AdEvent.AdEventType eventType = event.getType();
    if (eventType == AdEvent.AdEventType.AD_PROGRESS) {
      return;
    }
    String log = "IMA event: " + eventType;
    if (logText != null) {
      logText.append(log + "\n");
    }
    Log.i(LOG_TAG, log);
  };
}
MyActivity.java

private ImaSdkSettings getImaSdkSettings() {
  if (imaSdkSettings == null) {
    imaSdkSettings = ImaSdkFactory.getInstance().createImaSdkSettings();
    // Set any IMA SDK settings here.
  }
  return imaSdkSettings;
}
MyActivity.java

private void releasePlayer() {
  adsLoader.setPlayer(null);
  playerView.setPlayer(null);
  player.release();
  player = null;
}

private void initializePlayer() {
  // Set up the factory for media sources, passing the ads loader and ad view providers.
  DataSource.Factory dataSourceFactory = new DefaultDataSource.Factory(this);

  MediaSource.Factory mediaSourceFactory =
      new DefaultMediaSourceFactory(dataSourceFactory)
          .setLocalAdInsertionComponents(unusedAdTagUri -> adsLoader, playerView);

  // Create an ExoPlayer and set it as the player for content and ads.
  player = new ExoPlayer.Builder(this).setMediaSourceFactory(mediaSourceFactory).build();
  playerView.setPlayer(player);
  adsLoader.setPlayer(player);

  // Create the MediaItem to play, specifying the content URI and ad tag URI.
  Uri contentUri = Uri.parse(SAMPLE_VIDEO_URL);
  Uri adTagUri = Uri.parse(SAMPLE_VAST_TAG_URL);
  MediaItem mediaItem =
      new MediaItem.Builder()
          .setUri(contentUri)
          .setAdsConfiguration(new MediaItem.AdsConfiguration.Builder(adTagUri).build())
          .build();

  // Prepare the content and ad to be played with the SimpleExoPlayer.
  player.setMediaItem(mediaItem);
  player.prepare();

  // Set PlayWhenReady. If true, content and ads will autoplay.
  player.setPlayWhenReady(false);
}
MyActivity.java

@Override
public void onStart() {
  super.onStart();
  if (SDK_INT > 23) {
    initializePlayer();
    if (playerView != null) {
      playerView.onResume();
    }
  }
}

@Override
public void onResume() {
  super.onResume();
  if (SDK_INT <= 23 || player == null) {
    initializePlayer();
    if (playerView != null) {
      playerView.onResume();
    }
  }
}

@Override
public void onPause() {
  super.onPause();
  if (SDK_INT <= 23) {
    if (playerView != null) {
      playerView.onPause();
    }
    releasePlayer();
  }
}

@Override
public void onStop() {
  super.onStop();
  if (SDK_INT > 23) {
    if (playerView != null) {
      playerView.onPause();
    }
    releasePlayer();
  }
}

@Override
protected void onDestroy() {
  adsLoader.release();

  super.onDestroy();
}
MyActivity.java