Android で ARCore セッションを構成する
コレクションでコンテンツを整理
必要に応じて、コンテンツの保存と分類を行います。
アプリの AR エクスペリエンスを構築する ARCore セッションを設定します。
セッションとは
モーション トラッキングなど、すべての AR プロセス
環境の理解と照明の推定は、ARCore 内で行われます。
あります。Session
は ARCore へのメインのエントリ ポイントです。
APIAR システムの状態を管理し、セッションのライフサイクルを処理するため、
セッションを作成、構成、開始、停止する。最も重要なのは
アプリがカメラ画像へのアクセスを可能にするフレームを受信し、
デバイスのポーズ。
このセッションを使用すると、次の機能を構成できます。
ARCore がインストールされ、最新の状態であることを確認する
Session
を作成する前に、ARCore がインストールされ、最新の状態であることを確認してください。条件
ARCore がインストールされていないため、セッションの作成に失敗し、その後のインストールが行われる
またはアップグレードするには、アプリの再起動が必要です。
Java
// Verify that ARCore is installed and using the current version.
private boolean isARCoreSupportedAndUpToDate() {
ArCoreApk.Availability availability = ArCoreApk.getInstance().checkAvailability(this);
switch (availability) {
case SUPPORTED_INSTALLED:
return true;
case SUPPORTED_APK_TOO_OLD:
case SUPPORTED_NOT_INSTALLED:
try {
// Request ARCore installation or update if needed.
ArCoreApk.InstallStatus installStatus = ArCoreApk.getInstance().requestInstall(this, true);
switch (installStatus) {
case INSTALL_REQUESTED:
Log.i(TAG, "ARCore installation requested.");
return false;
case INSTALLED:
return true;
}
} catch (UnavailableException e) {
Log.e(TAG, "ARCore not installed", e);
}
return false;
case UNSUPPORTED_DEVICE_NOT_CAPABLE:
// This device is not supported for AR.
return false;
case UNKNOWN_CHECKING:
// ARCore is checking the availability with a remote query.
// This function should be called again after waiting 200 ms to determine the query result.
case UNKNOWN_ERROR:
case UNKNOWN_TIMED_OUT:
// There was an error checking for AR availability. This may be due to the device being offline.
// Handle the error appropriately.
}
}
Kotlin
// Verify that ARCore is installed and using the current version.
fun isARCoreSupportedAndUpToDate(): Boolean {
return when (ArCoreApk.getInstance().checkAvailability(this)) {
Availability.SUPPORTED_INSTALLED -> true
Availability.SUPPORTED_APK_TOO_OLD, Availability.SUPPORTED_NOT_INSTALLED -> {
try {
// Request ARCore installation or update if needed.
when (ArCoreApk.getInstance().requestInstall(this, true)) {
InstallStatus.INSTALL_REQUESTED -> {
Log.i(TAG, "ARCore installation requested.")
false
}
InstallStatus.INSTALLED -> true
}
} catch (e: UnavailableException) {
Log.e(TAG, "ARCore not installed", e)
false
}
}
Availability.UNSUPPORTED_DEVICE_NOT_CAPABLE ->
// This device is not supported for AR.
false
Availability.UNKNOWN_CHECKING -> {
// ARCore is checking the availability with a remote query.
// This function should be called again after waiting 200 ms to determine the query result.
}
Availability.UNKNOWN_ERROR, Availability.UNKNOWN_TIMED_OUT -> {
// There was an error checking for AR availability. This may be due to the device being offline.
// Handle the error appropriately.
}
}
}
セッションを作成する
ARCore でセッションを作成して構成する。
Java
public void createSession() {
// Create a new ARCore session.
session = new Session(this);
// Create a session config.
Config config = new Config(session);
// Do feature-specific operations here, such as enabling depth or turning on
// support for Augmented Faces.
// Configure the session.
session.configure(config);
}
Kotlin
fun createSession() {
// Create a new ARCore session.
session = Session(this)
// Create a session config.
val config = Config(session)
// Do feature-specific operations here, such as enabling depth or turning on
// support for Augmented Faces.
// Configure the session.
session.configure(config)
}
セッションを閉じる
Session
は、大量のネイティブ ヒープメモリを所有しています。明示的な
セッションを閉じると、アプリがネイティブ メモリを使い果たしてクラッシュする可能性があります。日時
AR セッションが不要になったら、
close()
リリース
説明します。アプリに AR 対応アクティビティが 1 つ含まれている場合は、close()
を呼び出します。
アクティビティの onDestroy()
メソッドから呼び出す。
Java
// Release native heap memory used by an ARCore session.
session.close();
Kotlin
// Release native heap memory used by an ARCore session.
session.close()
次のステップ
特に記載のない限り、このページのコンテンツはクリエイティブ・コモンズの表示 4.0 ライセンスにより使用許諾されます。コードサンプルは Apache 2.0 ライセンスにより使用許諾されます。詳しくは、Google Developers サイトのポリシーをご覧ください。Java は Oracle および関連会社の登録商標です。
最終更新日 2025-07-26 UTC。
[null,null,["最終更新日 2025-07-26 UTC。"],[[["\u003cp\u003eARCore sessions manage all AR processes like motion tracking and environmental understanding, and are accessed via the \u003ccode\u003eSession\u003c/code\u003e object.\u003c/p\u003e\n"],["\u003cp\u003eBefore creating an ARCore session, ensure ARCore is installed and up-to-date on the device to prevent session creation failures.\u003c/p\u003e\n"],["\u003cp\u003eTo configure features like lighting estimation or cloud anchors, utilize the \u003ccode\u003eConfig\u003c/code\u003e object and apply it to the session.\u003c/p\u003e\n"],["\u003cp\u003eTo prevent memory leaks and crashes, explicitly close the session using \u003ccode\u003esession.close()\u003c/code\u003e when it's no longer needed, such as in the activity's \u003ccode\u003eonDestroy()\u003c/code\u003e method.\u003c/p\u003e\n"]]],[],null,["# Configure an ARCore session in Android\n\nConfigure an ARCore session to build AR experiences for your app.\n\nWhat is a session?\n------------------\n\nAll [AR processes](/ar/discover/concepts), such as motion tracking,\nenvironmental understanding, and lighting estimation, happen inside an ARCore\nsession. [`Session`](/ar/reference/java/com/google/ar/core/Session) is the main entry point to the ARCore\nAPI. It manages the AR system state and handles the session lifecycle, allowing\nthe app to create, configure, start, or stop a session. Most importantly, it\nenables the app to receive frames that allow access to the camera image and\ndevice pose.\n\nThe session can be used to configure the following features:\n\n- [Lighting Estimation](/ar/develop/lighting-estimation)\n- [Cloud Anchors](/ar/develop/cloud-anchors)\n- [Augmented Images](/ar/develop/augmented-images)\n- [Augmented Faces](/ar/develop/augmented-faces)\n- [Depth API](/ar/develop/depth)\n- [Instant Placement](/ar/develop/instant-placement)\n- [ARCore Geospatial API](/ar/develop/geospatial)\n\nVerify that ARCore is installed and up to date\n----------------------------------------------\n\nBefore creating a `Session`, verify that ARCore is installed and up to date. If\nARCore isn't installed, session creation fails and any subsequent installation\nor upgrade of ARCore requires an app restart. \n\n### Java\n\n // Verify that ARCore is installed and using the current version.\n private boolean isARCoreSupportedAndUpToDate() {\n ArCoreApk.Availability availability = ArCoreApk.getInstance().checkAvailability(this);\n switch (availability) {\n case SUPPORTED_INSTALLED:\n return true;\n\n case SUPPORTED_APK_TOO_OLD:\n case SUPPORTED_NOT_INSTALLED:\n try {\n // Request ARCore installation or update if needed.\n ArCoreApk.InstallStatus installStatus = ArCoreApk.getInstance().requestInstall(this, true);\n switch (installStatus) {\n case INSTALL_REQUESTED:\n Log.i(TAG, \"ARCore installation requested.\");\n return false;\n case INSTALLED:\n return true;\n }\n } catch (UnavailableException e) {\n Log.e(TAG, \"ARCore not installed\", e);\n }\n return false;\n\n case UNSUPPORTED_DEVICE_NOT_CAPABLE:\n // This device is not supported for AR.\n return false;\n\n case UNKNOWN_CHECKING:\n // ARCore is checking the availability with a remote query.\n // This function should be called again after waiting 200 ms to determine the query result.\n case UNKNOWN_ERROR:\n case UNKNOWN_TIMED_OUT:\n // There was an error checking for AR availability. This may be due to the device being offline.\n // Handle the error appropriately.\n }\n }\n\n### Kotlin\n\n // Verify that ARCore is installed and using the current version.\n fun isARCoreSupportedAndUpToDate(): Boolean {\n return when (ArCoreApk.getInstance().checkAvailability(this)) {\n Availability.SUPPORTED_INSTALLED -\u003e true\n Availability.SUPPORTED_APK_TOO_OLD, Availability.SUPPORTED_NOT_INSTALLED -\u003e {\n try {\n // Request ARCore installation or update if needed.\n when (ArCoreApk.getInstance().requestInstall(this, true)) {\n InstallStatus.INSTALL_REQUESTED -\u003e {\n Log.i(TAG, \"ARCore installation requested.\")\n false\n }\n InstallStatus.INSTALLED -\u003e true\n }\n } catch (e: UnavailableException) {\n Log.e(TAG, \"ARCore not installed\", e)\n false\n }\n }\n\n Availability.UNSUPPORTED_DEVICE_NOT_CAPABLE -\u003e\n // This device is not supported for AR.\n false\n\n Availability.UNKNOWN_CHECKING -\u003e {\n // ARCore is checking the availability with a remote query.\n // This function should be called again after waiting 200 ms to determine the query result.\n }\n Availability.UNKNOWN_ERROR, Availability.UNKNOWN_TIMED_OUT -\u003e {\n // There was an error checking for AR availability. This may be due to the device being offline.\n // Handle the error appropriately.\n }\n }\n }\n\nCreate a session\n----------------\n\nCreate and configure a session in ARCore. \n\n### Java\n\n public void createSession() {\n // Create a new ARCore session.\n session = new Session(this);\n\n // Create a session config.\n Config config = new Config(session);\n\n // Do feature-specific operations here, such as enabling depth or turning on\n // support for Augmented Faces.\n\n // Configure the session.\n session.configure(config);\n }\n\n### Kotlin\n\n fun createSession() {\n // Create a new ARCore session.\n session = Session(this)\n\n // Create a session config.\n val config = Config(session)\n\n // Do feature-specific operations here, such as enabling depth or turning on\n // support for Augmented Faces.\n\n // Configure the session.\n session.configure(config)\n }\n\nClose a session\n---------------\n\n`Session` owns a significant amount of native heap memory. Failure to explicitly\nclose the session may cause your app to run out of native memory and crash. When\nthe AR session is no longer needed, call\n[`close()`](/ar/reference/java/com/google/ar/core/Session#close()) to release\nresources. If your app contains a single AR-enabled activity, call `close()`\nfrom the activity's `onDestroy()` method. \n\n### Java\n\n // Release native heap memory used by an ARCore session.\n session.close();\n\n### Kotlin\n\n // Release native heap memory used by an ARCore session.\n session.close()\n\nNext steps\n----------\n\n- [ARCore quickstart for Android](/ar/develop/java/quickstart)"]]