在 Android 中設定 ARCore 工作階段

設定 ARCore 工作階段,為您的應用程式打造 AR 體驗。

什麼是工作階段?

所有 AR 程序,例如動作追蹤 透過 ARCore 技術瞭解環境知識,以及估算亮度 會很有幫助Session 是 ARCore 的主要進入點 也能使用 Google Cloud CLI 或 Compute Engine API可管理 AR 系統狀態並處理工作階段生命週期 應用程式,建立、設定、開始或停止工作階段。最重要的是 應用程式即可接收允許存取相機圖片的影格 姿勢。

這個工作階段可用於設定下列功能:

確認 ARCore 已安裝且為最新版本

建立 Session 前,請確認 ARCore 已安裝且為最新版本。如果 未安裝 ARCore,工作階段建立失敗,且後續安裝也失敗 或升級 ARCore。

JavaKotlin
// 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.
 
}
}
// 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.
   
}
 
}
}

建立工作階段

在 ARCore 中建立並設定工作階段。

JavaKotlin
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);
}
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)
}

關閉工作階段

Session 擁有大量的原生堆積記憶體。未明確指定 關閉工作階段可能會導致應用程式超出原生記憶體容量,因而當機。時間 不再需要 AR 工作階段,請呼叫 將於 close()釋出 再複習一下,機構節點 是所有 Google Cloud Platform 資源的根節點如果應用程式含有單一支援 AR 的活動,請呼叫 close() 來自活動的 onDestroy() 方法

JavaKotlin
// Release native heap memory used by an ARCore session.
session
.close();
// Release native heap memory used by an ARCore session.
session
.close()

後續步驟