Project with Native Code Required
This API only works in projects made with
or in those made with
expo init or Create React Native App which have since ejected. For
more information about ejecting, please see
the guide on
the Create React Native App repository.
AppRegistry is the JS entry point to running all React Native apps. App root components should register themselves with
AppRegistry.registerComponent, then the native system can load the bundle for the app and then actually run the app when it's ready by invoking
To "stop" an application when a view should be destroyed, call
AppRegistry.unmountApplicationComponentAtRootTag with the tag that was passed into
runApplication. These should always be used as a pair.
AppRegistry should be required early in the
require sequence to make sure the JS execution environment is setup before other modules are required.
static registerComponent(appKey, componentProvider, section?)
static registerRunnable(appKey, run)
static registerSection(appKey, component)
static runApplication(appKey, appParameters)
static registerHeadlessTask(taskKey, taskProvider)
Register a headless task. A headless task is a bit of code that runs without a UI. @param taskKey the key associated with this task @param taskProvider a promise returning function that takes some data passed from the native side as the only argument; when the promise is resolved or rejected the native side is notified of this event and it may decide to destroy the JS context.
static registerCancellableHeadlessTask(taskKey, taskProvider, taskCancelProvider)
Register a headless task which can be cancelled. A headless task is a bit of code that runs without a UI. @param taskKey the key associated with this task @param taskProvider a promise returning function that takes some data passed from the native side as the only argument; when the promise is resolved or rejected the native side is notified of this event and it may decide to destroy the JS context. @param taskCancelProvider a void returning function that takes no arguments; when a cancellation is requested, the function being executed by taskProvider should wrap up and return ASAP.
static startHeadlessTask(taskId, taskKey, data)
Only called from native code. Starts a headless task.
@param taskId the native id for this task instance to keep track of its execution @param taskKey the key for the task to start @param data the data to pass to the task
static cancelHeadlessTask(taskId, taskKey)
Only called from native code. Cancels a headless task.
@param taskId the native id for this task instance that was used when startHeadlessTask was called @param taskKey the key for the task that was used when startHeadlessTask was called