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Android: add support for headless js tasks

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Summary: Provide a base `HeadlessJsTaskService` class that can be extended to run JS in headless mode in response to some event. Added `HeadlessJsTaskEventListener` for modules that are interested in background lifecycle events, and `HeadlessJsTaskContext` that basically extends `ReactContext` without touching it. The react instance is shared with the rest of the app (e.g. activities) through the `ReactNativeHost`.

Reviewed By: astreet

Differential Revision: D3225753

fbshipit-source-id: 2c5e7679636f31e0e7842d8a67aeb95baf47c563
This commit is contained in:
Felix Oghina
2016-09-29 03:58:33 -07:00
committed by Facebook Github Bot
parent 542ab8643e
commit 3080b8d26c
14 changed files with 650 additions and 31 deletions
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ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java
+9 -2
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@@ -12,9 +12,9 @@ package com.facebook.react.bridge;
import javax.annotation.Nullable;
import java.lang.ref.WeakReference;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArraySet;
import android.app.Activity;
import android.content.Context;
@@ -47,6 +47,8 @@ public class ReactContext extends ContextWrapper {
private final CopyOnWriteArraySet<ActivityEventListener> mActivityEventListeners =
new CopyOnWriteArraySet<>();
private LifecycleState mLifecycleState = LifecycleState.BEFORE_CREATE;
private @Nullable CatalystInstance mCatalystInstance;
private @Nullable LayoutInflater mInflater;
private @Nullable MessageQueueThread mUiMessageQueueThread;
@@ -54,7 +56,6 @@ public class ReactContext extends ContextWrapper {
private @Nullable MessageQueueThread mJSMessageQueueThread;
private @Nullable NativeModuleCallExceptionHandler mNativeModuleCallExceptionHandler;
private @Nullable WeakReference<Activity> mCurrentActivity;
private LifecycleState mLifecycleState = LifecycleState.BEFORE_RESUME;
public ReactContext(Context base) {
super(base);
@@ -145,6 +146,10 @@ public class ReactContext extends ContextWrapper {
return mCatalystInstance != null && !mCatalystInstance.isDestroyed();
}
public LifecycleState getLifecycleState() {
return mLifecycleState;
}
public void addLifecycleEventListener(final LifecycleEventListener listener) {
mLifecycleEventListeners.add(listener);
if (hasActiveCatalystInstance()) {
@@ -197,6 +202,7 @@ public class ReactContext extends ContextWrapper {
*/
public void onHostResume(@Nullable Activity activity) {
UiThreadUtil.assertOnUiThread();
mLifecycleState = LifecycleState.RESUMED;
mCurrentActivity = new WeakReference(activity);
mLifecycleState = LifecycleState.RESUMED;
for (LifecycleEventListener listener : mLifecycleEventListeners) {
@@ -228,6 +234,7 @@ public class ReactContext extends ContextWrapper {
*/
public void onHostDestroy() {
UiThreadUtil.assertOnUiThread();
mLifecycleState = LifecycleState.BEFORE_CREATE;
for (LifecycleEventListener listener : mLifecycleEventListeners) {
listener.onHostDestroy();
}