Java Code Examples for com.google.firebase.FirebaseApp#getInstance()

@Test
public void testFirebaseInitProvider() throws Exception {
  ProviderInfo providerInfo = new ProviderInfo();
  providerInfo.authority = "com.google.android.gms.tests.common.firebaseinitprovider";
  firebaseInitProvider.attachInfo(targetContext, providerInfo);
  try {
    FirebaseApp.getInstance();
    fail();
  } catch (Exception expected) {
  }

  // Now we set an app explicitly.
  FirebaseOptions firebaseOptions =
      new FirebaseOptions.Builder()
          .setApiKey(GOOGLE_API_KEY)
          .setApplicationId(GOOGLE_APP_ID)
          .build();
  FirebaseApp firebaseApp = FirebaseApp.initializeApp(targetContext, firebaseOptions);

  assertEquals(firebaseApp, FirebaseApp.getInstance());
}
 

private FirebaseInAppMessagingDisplay buildFirebaseInAppMessagingUI(
    ComponentContainer container) {
  FirebaseApp firebaseApp = FirebaseApp.getInstance();
  FirebaseInAppMessaging headless = container.get(FirebaseInAppMessaging.class);
  Application firebaseApplication = (Application) firebaseApp.getApplicationContext();

  UniversalComponent universalComponent =
      DaggerUniversalComponent.builder()
          .applicationModule(new ApplicationModule(firebaseApplication))
          .build();
  AppComponent instance =
      DaggerAppComponent.builder()
          .universalComponent(universalComponent)
          .headlessInAppMessagingModule(new HeadlessInAppMessagingModule(headless))
          .build();

  FirebaseInAppMessagingDisplay firebaseInAppMessagingDisplay =
      instance.providesFirebaseInAppMessagingUI();
  firebaseApplication.registerActivityLifecycleCallbacks(firebaseInAppMessagingDisplay);
  return firebaseInAppMessagingDisplay;
}
 

/**
 * Gets the default FirebaseDatabase instance.
 *
 * @return A FirebaseDatabase instance.
 */
@NonNull
public static FirebaseDatabase getInstance() {
  FirebaseApp instance = FirebaseApp.getInstance();
  if (instance == null) {
    throw new DatabaseException("You must call FirebaseApp.initialize() first.");
  }
  return getInstance(instance, instance.getOptions().getDatabaseUrl());
}
 

public static FirebaseApp getAppInstance(Context context) {
    try {
        return FirebaseApp.getInstance(APP_NAME);
    } catch (IllegalStateException e) {
        return initializeApp(context);
    }
}
 

private static FirebaseApp getApp(String appName) {
  FirebaseApp app;
  try {
    app = FirebaseApp.getInstance(appName);
    return app;
  } catch (Exception e) {
    return null;
  }
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // [START firebase_options]
    // Manually configure Firebase Options. The following fields are REQUIRED:
    //   - Project ID
    //   - App ID
    //   - API Key
    FirebaseOptions options = new FirebaseOptions.Builder()
            .setProjectId("my-firebase-project")
            .setApplicationId("1:27992087142:android:ce3b6448250083d1")
            .setApiKey("AIzaSyADUe90ULnQDuGShD9W23RDP0xmeDc6Mvw")
            // setDatabaseURL(...)
            // setStorageBucket(...)
            .build();
    // [END firebase_options]

    // [START firebase_secondary]
    // Initialize with secondary app
    FirebaseApp.initializeApp(this /* Context */, options, "secondary");

    // Retrieve secondary FirebaseApp
    FirebaseApp secondary = FirebaseApp.getInstance("secondary");
    // [END firebase_secondary]
}
 

private FireBase() {
    app = FirebaseApp.getInstance();
    auth = FirebaseAuth.getInstance(app);

    /*
    FirebaseDatabase fdb = FirebaseDatabase.getInstance(app);
    fdb.setPersistenceEnabled(true);
    database = fdb.getReference();
    */

}
 

private FirebaseApp getAppInstance(Context context) {
    try {
        return FirebaseApp.getInstance(FIREBASE_APP_NAME);
    } catch (IllegalStateException e) {
        return initializeApp(context);
    }
}
 

private FirebaseApp getScratchApp(FirebaseApp defaultApp) {
    try {
        return FirebaseApp.getInstance(firebaseAppName);
    } catch (IllegalStateException e) {
        return FirebaseApp.initializeApp(defaultApp.getApplicationContext(),
                defaultApp.getOptions(), firebaseAppName);
    }
}
 

private FirebaseAuth getScratchAuth(FlowParameters flowParameters) {
    // Use a different FirebaseApp so that the anonymous user state is not lost in our
    // original FirebaseAuth instance.
    if (mScratchAuth == null) {
        FirebaseApp app = FirebaseApp.getInstance(flowParameters.appName);
        mScratchAuth = FirebaseAuth.getInstance(getScratchApp(app));
    }
    return mScratchAuth;
}
 

/**
 * Gets a FirebaseDatabase instance for the specified URL.
 *
 * @param url The URL to the Firebase Database instance you want to access.
 * @return A FirebaseDatabase instance.
 */
@NonNull
public static FirebaseDatabase getInstance(@NonNull String url) {
  FirebaseApp instance = FirebaseApp.getInstance();
  if (instance == null) {
    throw new DatabaseException("You must call FirebaseApp.initialize() first.");
  }
  return getInstance(instance, url);
}
 

public static FirebaseApp testFirebaseApp() {
  try {
    return FirebaseApp.getInstance(FirebaseApp.DEFAULT_APP_NAME);
  } catch (IllegalStateException e) {
    return FirebaseApp.initializeApp(ApplicationProvider.getApplicationContext(), OPTIONS);
  }
}
 

@NonNull
public static FirebaseFirestore getInstance() {
  FirebaseApp app = FirebaseApp.getInstance();
  if (app == null) {
    throw new IllegalStateException("You must call FirebaseApp.initializeApp first.");
  }
  return getInstance(app, DatabaseId.DEFAULT_DATABASE_ID);
}
 

/** @hide */
public Builder(FirebaseDynamicLinksImpl firebaseDynamicLinks) {
  firebaseDynamicLinksImpl = firebaseDynamicLinks;
  builderParameters = new Bundle();
  if (FirebaseApp.getInstance() != null) {
    builderParameters.putString(
        KEY_API_KEY, FirebaseApp.getInstance().getOptions().getApiKey());
  }
  fdlParameters = new Bundle();
  builderParameters.putBundle(KEY_DYNAMIC_LINK_PARAMETERS, fdlParameters);
}
 

/**
 * Gets the singleton {@link FirebaseCrashlytics} instance.
 *
 * <p>The default {@link FirebaseApp} instance must be initialized before this function is called.
 * See <a
 * href="https://firebase.google.com/docs/reference/android/com/google/firebase/FirebaseApp">
 * FirebaseApp</a> for more information.
 */
@NonNull
public static FirebaseCrashlytics getInstance() {
  final FirebaseApp app = FirebaseApp.getInstance();
  final FirebaseCrashlytics instance = app.get(FirebaseCrashlytics.class);
  if (instance == null) {
    throw new NullPointerException("FirebaseCrashlytics component is not present.");
  }
  return instance;
}
 

public static FirebaseApp getFirebaseApp() {
    return FirebaseApp.getInstance(FIREBASE_NAME);
}
 

/**
 * Returns the {@link FirebaseSegmentation} initialized with the default {@link FirebaseApp}.
 *
 * @return a {@link FirebaseSegmentation} instance
 */
@NonNull
public static FirebaseSegmentation getInstance() {
  FirebaseApp defaultFirebaseApp = FirebaseApp.getInstance();
  return getInstance(defaultFirebaseApp);
}
 

public AppHttpClient() {
  this(FirebaseApp.getInstance());
}
 

private FirebaseAuth getAuth() {
    FirebaseApp app = FirebaseApp.getInstance(getArguments().appName);
    return FirebaseAuth.getInstance(app);
}
 

/**
 * Returns the {@link FirebaseInstallations} initialized with the default {@link FirebaseApp}.
 *
 * @return a {@link FirebaseInstallations} instance
 */
@NonNull
public static FirebaseInstallations getInstance() {
  FirebaseApp defaultFirebaseApp = FirebaseApp.getInstance();
  return getInstance(defaultFirebaseApp);
}