public class

FirebaseApp

extends Object
java.lang.Object
   ↳ com.google.firebase.FirebaseApp

Class Overview

The entry point of Firebase SDKs. It holds common configuration and state for Firebase APIs. Most applications don't need to directly interact with FirebaseApp.

Firebase APIs use the default FirebaseApp by default, unless a different one is explicitly passed to the API via FirebaseFoo.getInstance(firebaseApp).

initializeApp(FirebaseOptions) initializes the default app instance. This method should be invoked at startup.

Summary

Constants
String DEFAULT_APP_NAME
Public Methods
void delete()
Deletes the FirebaseApp and all its data.
boolean equals(Object o)
static List<FirebaseApp> getApps()
Returns a list of all FirebaseApps.
static FirebaseApp getInstance(String name)
Returns the instance identified by the unique name, or throws if it does not exist.
static FirebaseApp getInstance()
Returns the default (first initialized) instance of the FirebaseApp.
String getName()
Returns the unique name of this app.
FirebaseOptions getOptions()
Returns the specified FirebaseOptions.
int hashCode()
static FirebaseApp initializeApp(String name)
Initializes a named FirebaseApp instance using Google Application Default Credentials.
static FirebaseApp initializeApp(FirebaseOptions options, String name)
Initializes a named FirebaseApp instance using the given options.
static FirebaseApp initializeApp()
Initializes the default FirebaseApp instance using Google Application Default Credentials.
static FirebaseApp initializeApp(FirebaseOptions options)
Initializes the default FirebaseApp instance using the given options.
String toString()
[Expand]
Inherited Methods
From class java.lang.Object

Constants

public static final String DEFAULT_APP_NAME

Constant Value: "[DEFAULT]"

Public Methods

public void delete ()

Deletes the FirebaseApp and all its data. All calls to this FirebaseApp instance will throw once it has been called.

A no-op if delete was called before.

public boolean equals (Object o)

public static List<FirebaseApp> getApps ()

Returns a list of all FirebaseApps.

public static FirebaseApp getInstance (String name)

Returns the instance identified by the unique name, or throws if it does not exist.

Parameters
name represents the name of the FirebaseApp instance.
Returns
Throws
IllegalStateException if the FirebaseApp was not initialized, either via initializeApp(FirebaseOptions, String) or getApps().

public static FirebaseApp getInstance ()

Returns the default (first initialized) instance of the FirebaseApp.

Throws
IllegalStateException if the default app was not initialized.

public String getName ()

Returns the unique name of this app.

public FirebaseOptions getOptions ()

Returns the specified FirebaseOptions.

public int hashCode ()

public static FirebaseApp initializeApp (String name)

Initializes a named FirebaseApp instance using Google Application Default Credentials. Loads additional FirebaseOptions from the environment in the same way as the initializeApp() method.

Throws
IllegalStateException if an app with the same name has already been initialized.
IllegalArgumentException if an error occurs while loading options from the environment.

public static FirebaseApp initializeApp (FirebaseOptions options, String name)

Initializes a named FirebaseApp instance using the given options.

Parameters
options represents the global FirebaseOptions
name unique name for the app. It is an error to initialize an app with an already existing name. Starting and ending whitespace characters in the name are ignored (trimmed).
Returns
Throws
IllegalStateException if an app with the same name has already been initialized.

public static FirebaseApp initializeApp ()

Initializes the default FirebaseApp instance using Google Application Default Credentials. Also attempts to load additional FirebaseOptions from the environment by looking up the FIREBASE_CONFIG environment variable. If the value of the variable starts with '{', it is parsed as a JSON object. Otherwise it is treated as a file name and the JSON content is read from the corresponding file.

Throws
IllegalStateException if the default app has already been initialized.
IllegalArgumentException if an error occurs while loading options from the environment.

public static FirebaseApp initializeApp (FirebaseOptions options)

Initializes the default FirebaseApp instance using the given options.

Throws
IllegalStateException if the default app has already been initialized.

public String toString ()