private void setupReactContext(ReactApplicationContext reactContext) {
Systrace.beginSection(TRACE_TAG_REACT_JAVA_BRIDGE, "setupReactContext");
UiThreadUtil.assertOnUiThread();
Assertions.assertCondition(mCurrentReactContext == null);
mCurrentReactContext = Assertions.assertNotNull(reactContext);
CatalystInstance catalystInstance =
Assertions.assertNotNull(reactContext.getCatalystInstance());
catalystInstance.initialize();
mDevSupportManager.onNewReactContextCreated(reactContext);
mMemoryPressureRouter.addMemoryPressureListener(catalystInstance);
moveReactContextToCurrentLifecycleState();
for (ReactRootView rootView : mAttachedRootViews) {
attachMeasuredRootViewToInstance(rootView, catalystInstance);
}
ReactInstanceEventListener[] listeners =
new ReactInstanceEventListener[mReactInstanceEventListeners.size()];
listeners = mReactInstanceEventListeners.toArray(listeners);
for (ReactInstanceEventListener listener : listeners) {
listener.onReactContextInitialized(reactContext);
}
Systrace.endSection(TRACE_TAG_REACT_JAVA_BRIDGE);
}
@Override
public void destroy() {
UiThreadUtil.assertOnUiThread();
if (mUseDeveloperSupport) {
mDevSupportManager.setDevSupportEnabled(false);
}
moveToBeforeCreateLifecycleState();
if (mReactContextInitAsyncTask != null) {
mReactContextInitAsyncTask.cancel(true);
}
mMemoryPressureRouter.destroy(mApplicationContext);
if (mCurrentReactContext != null) {
mCurrentReactContext.destroy();
mCurrentReactContext = null;
mHasStartedCreatingInitialContext = false;
}
mCurrentActivity = null;
ResourceDrawableIdHelper.getInstance().clear();
}
/**
* Detach given {@param rootView} from current catalyst instance. It's safe to call this method
* multiple times on the same {@param rootView} - in that case view will be detached with the
* first call.
*/
@Override
public void detachRootView(ReactRootView rootView) {
UiThreadUtil.assertOnUiThread();
if (mAttachedRootViews.remove(rootView)) {
if (mCurrentReactContext != null && mCurrentReactContext.hasActiveCatalystInstance()) {
detachViewFromInstance(rootView, mCurrentReactContext.getCatalystInstance());
}
}
}
/**
* Attach given {@param rootView} to a catalyst instance manager and start JS application using JS
* module provided by {@link ReactRootView#getJSModuleName}. If the react context is currently
* being (re)-created, or if react context has not been created yet, the JS application associated
* with the provided root view will be started asynchronously, i.e this method won't block. This
* view will then be tracked by this manager and in case of catalyst instance restart it will be
* re-attached.
*/
@Override
public void attachMeasuredRootView(ReactRootView rootView) {
UiThreadUtil.assertOnUiThread();
mAttachedRootViews.add(rootView);
// If react context is being created in the background, JS application will be started
// automatically when creation completes, as root view is part of the attached root view list.
if (mReactContextInitAsyncTask == null && mCurrentReactContext != null) {
attachMeasuredRootViewToInstance(rootView, mCurrentReactContext.getCatalystInstance());
}
}
@Override
public void onHostDestroy() {
UiThreadUtil.assertOnUiThread();
if (mUseDeveloperSupport) {
mDevSupportManager.setDevSupportEnabled(false);
}
moveToBeforeCreateLifecycleState();
mCurrentActivity = null;
}
private void tearDownReactContext(ReactContext reactContext) {
UiThreadUtil.assertOnUiThread();
if (mLifecycleState == LifecycleState.RESUMED) {
reactContext.onHostPause();
}
for (ReactRootView rootView : mAttachedRootViews) {
detachViewFromInstance(rootView, reactContext.getCatalystInstance());
}
reactContext.destroy();
mDevSupportManager.onReactInstanceDestroyed(reactContext);
mMemoryPressureRouter.removeMemoryPressureListener(reactContext.getCatalystInstance());
}
/**
* Use this method when the activity resumes to enable invoking the back button directly from JS.
*
* <p>This method retains an instance to provided mDefaultBackButtonImpl. Thus it's important to
* pass from the activity instance that owns this particular instance of {@link
* XReactInstanceManagerImpl}, so that once this instance receive {@link #onHostDestroy} event it
* will clear the reference to that defaultBackButtonImpl.
*
* @param defaultBackButtonImpl a {@link DefaultHardwareBackBtnHandler} from an Activity that owns
* this instance of {@link XReactInstanceManagerImpl}.
*/
@Override
public void onHostResume(Activity activity, DefaultHardwareBackBtnHandler defaultBackButtonImpl) {
UiThreadUtil.assertOnUiThread();
mDefaultBackButtonImpl = defaultBackButtonImpl;
if (mUseDeveloperSupport) {
mDevSupportManager.setDevSupportEnabled(true);
}
mCurrentActivity = activity;
moveToResumedLifecycleState(false);
}
@Override
public void onHostPause() {
UiThreadUtil.assertOnUiThread();
mDefaultBackButtonImpl = null;
if (mUseDeveloperSupport) {
mDevSupportManager.setDevSupportEnabled(false);
}
moveToBeforeResumeLifecycleState();
mCurrentActivity = null;
}
/**
* This method will give JS the opportunity to consume the back button event. If JS does not
* consume the event, mDefaultBackButtonImpl will be invoked at the end of the round trip to JS.
*/
@Override
public void onBackPressed() {
UiThreadUtil.assertOnUiThread();
ReactContext reactContext = mCurrentReactContext;
if (mCurrentReactContext == null) {
// Invoke without round trip to JS.
FLog.w(ReactConstants.TAG, "Instance detached from instance manager");
invokeDefaultOnBackPressed();
} else {
DeviceEventManagerModule deviceEventManagerModule =
Assertions.assertNotNull(reactContext).getNativeModule(DeviceEventManagerModule.class);
deviceEventManagerModule.emitHardwareBackPressed();
}
}
private void recreateReactContextInBackground(
JavaScriptExecutor.Factory jsExecutorFactory, JSBundleLoader jsBundleLoader) {
UiThreadUtil.assertOnUiThread();
ReactContextInitParams initParams =
new ReactContextInitParams(jsExecutorFactory, jsBundleLoader);
if (mReactContextInitAsyncTask == null) {
// No background task to create react context is currently running, create and execute one.
mReactContextInitAsyncTask = new ReactContextInitAsyncTask();
mReactContextInitAsyncTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, initParams);
} else {
// Background task is currently running, queue up most recent init params to recreate context
// once task completes.
mPendingReactContextInitParams = initParams;
}
}
private void attachMeasuredRootViewToInstance(
ReactRootView rootView, CatalystInstance catalystInstance) {
Systrace.beginSection(TRACE_TAG_REACT_JAVA_BRIDGE, "attachMeasuredRootViewToInstance");
UiThreadUtil.assertOnUiThread();
// Reset view content as it's going to be populated by the application content from JS
rootView.removeAllViews();
rootView.setId(View.NO_ID);
UIManagerModule uiManagerModule = catalystInstance.getNativeModule(UIManagerModule.class);
int rootTag = uiManagerModule.addMeasuredRootView(rootView);
@Nullable Bundle launchOptions = rootView.getLaunchOptions();
WritableMap initialProps = Arguments.makeNativeMap(launchOptions);
String jsAppModuleName = rootView.getJSModuleName();
WritableNativeMap appParams = new WritableNativeMap();
appParams.putDouble("rootTag", rootTag);
appParams.putMap("initialProps", initialProps);
catalystInstance.getJSModule(AppRegistry.class).runApplication(jsAppModuleName, appParams);
Systrace.endSection(TRACE_TAG_REACT_JAVA_BRIDGE);
}
private void recreateReactContextInBackgroundInner() {
UiThreadUtil.assertOnUiThread();
if (mUseDeveloperSupport && mJSMainModuleName != null) {
final DeveloperSettings devSettings = mDevSupportManager.getDevSettings();
// If remote JS debugging is enabled, load from dev server.
if (mDevSupportManager.hasUpToDateJSBundleInCache()
&& !devSettings.isRemoteJSDebugEnabled()) {
// If there is a up-to-date bundle downloaded from server,
// with remote JS debugging disabled, always use that.
onJSBundleLoadedFromServer();
} else if (mBundleLoader == null) {
mDevSupportManager.handleReloadJS();
} else {
mDevSupportManager.isPackagerRunning(
new DevServerHelper.PackagerStatusCallback() {
@Override
public void onPackagerStatusFetched(final boolean packagerIsRunning) {
UiThreadUtil.runOnUiThread(
new Runnable() {
@Override
public void run() {
if (packagerIsRunning) {
mDevSupportManager.handleReloadJS();
} else {
// If dev server is down, disable the remote JS debugging.
devSettings.setRemoteJSDebugEnabled(false);
recreateReactContextInBackgroundFromBundleLoader();
}
}
});
}
});
}
return;
}
recreateReactContextInBackgroundFromBundleLoader();
}
private void detachViewFromInstance(ReactRootView rootView, CatalystInstance catalystInstance) {
UiThreadUtil.assertOnUiThread();
catalystInstance
.getJSModule(AppRegistry.class)
.unmountApplicationComponentAtRootTag(rootView.getId());
}
@Override
public void showDevOptionsDialog() {
UiThreadUtil.assertOnUiThread();
mDevSupportManager.showDevOptionsDialog();
}
private void invokeDefaultOnBackPressed() {
UiThreadUtil.assertOnUiThread();
if (mDefaultBackButtonImpl != null) {
mDefaultBackButtonImpl.invokeDefaultOnBackPressed();
}
}