Add dev bundle download listener on Android

Summary:
This exposes a way to listen to JS bundle download events when creating a ReactInstanceManager. This can be used to display a custom native UI while the JS bundle is loading. It is a pretty specific use case but Expo will need this to display loading progress on the app loading splash screen.

**Test plan**
Tested by adding a listener to the ReactInstanceManager in the Expo app and checked that it gets called when the bundle is loading.
Closes https://github.com/facebook/react-native/pull/12984

Reviewed By: devknoll

Differential Revision: D4797638

Pulled By: hramos

fbshipit-source-id: 04d7cd4071535670c1bcb121566748e495197c80

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManager.java

@@ -53,6 +53,7 @@ import com.facebook.react.common.annotations.VisibleForTesting;
 import com.facebook.react.devsupport.DevSupportManagerFactory;
 import com.facebook.react.devsupport.ReactInstanceDevCommandsHandler;
 import com.facebook.react.devsupport.RedBoxHandler;
+import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.DevSupportManager;
 import com.facebook.react.devsupport.interfaces.PackagerStatusCallback;
 import com.facebook.react.modules.appregistry.AppRegistry;
@@ -221,6 +222,7 @@ public class ReactInstanceManager {
     @Nullable RedBoxHandler redBoxHandler,
     boolean lazyNativeModulesEnabled,
     boolean lazyViewManagersEnabled,
+    @Nullable DevBundleDownloadListener devBundleDownloadListener,
     boolean setupReactContextInBackgroundEnabled,
     boolean useSeparateUIBackgroundThread,
     int minNumShakes) {
@@ -242,6 +244,7 @@ public class ReactInstanceManager {
         mJSMainModuleName,
         useDeveloperSupport,
         redBoxHandler,
+        devBundleDownloadListener,
         minNumShakes);
     mBridgeIdleDebugListener = bridgeIdleDebugListener;
     mLifecycleState = initialLifecycleState;

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManagerBuilder.java

@@ -15,6 +15,7 @@ import com.facebook.react.bridge.NativeModuleCallExceptionHandler;
 import com.facebook.react.bridge.NotThreadSafeBridgeIdleDebugListener;
 import com.facebook.react.bridge.JSBundleLoader;
 import com.facebook.react.common.LifecycleState;
+import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.DevSupportManager;
 import com.facebook.react.devsupport.RedBoxHandler;
 import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
@@ -42,6 +43,7 @@ public class ReactInstanceManagerBuilder {
   protected @Nullable RedBoxHandler mRedBoxHandler;
   protected boolean mLazyNativeModulesEnabled;
   protected boolean mLazyViewManagersEnabled;
+  protected @Nullable DevBundleDownloadListener mDevBundleDownloadListener;
   protected boolean mSetupReactContextInBackground;
   protected boolean mUseSeparateUIBackgroundThread;
   protected int mMinNumShakes = 1;
@@ -189,6 +191,11 @@ public class ReactInstanceManagerBuilder {
     return this;
   }
 
+  public ReactInstanceManagerBuilder setDevBundleDownloadListener(@Nullable DevBundleDownloadListener listener) {
+    mDevBundleDownloadListener = listener;
+    return this;
+  }
+
   public ReactInstanceManagerBuilder setSetupReactContextInBackgroundEnabled(
     boolean setupReactContextInBackground) {
     mSetupReactContextInBackground = setupReactContextInBackground;
@@ -252,6 +259,7 @@ public class ReactInstanceManagerBuilder {
       mRedBoxHandler,
       mLazyNativeModulesEnabled,
       mLazyViewManagersEnabled,
+      mDevBundleDownloadListener,
       mSetupReactContextInBackground,
       mUseSeparateUIBackgroundThread,
       mMinNumShakes);

ReactAndroid/src/main/java/com/facebook/react/devsupport/BundleDownloader.java

@@ -20,6 +20,7 @@ import java.util.regex.Pattern;
 import com.facebook.common.logging.FLog;
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.common.ReactConstants;
+import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.common.DebugServerException;
 
 import org.json.JSONException;
@@ -36,12 +37,6 @@ import okio.Okio;
 import okio.Sink;
 
 public class BundleDownloader {
-  public interface DownloadCallback {
-    void onSuccess();
-    void onProgress(@Nullable String status, @Nullable Integer done, @Nullable Integer total);
-    void onFailure(Exception cause);
-  }
-
   private final OkHttpClient mClient;
 
   private @Nullable Call mDownloadBundleFromURLCall;
@@ -51,7 +46,7 @@ public class BundleDownloader {
   }
 
   public void downloadBundleFromURL(
-      final DownloadCallback callback,
+      final DevBundleDownloadListener callback,
       final File outputFile,
       final String bundleURL) {
     final Request request = new Request.Builder()
@@ -156,7 +151,7 @@ public class BundleDownloader {
       int statusCode,
       BufferedSource body,
       File outputFile,
-      DownloadCallback callback) throws IOException {
+      DevBundleDownloadListener callback) throws IOException {
     // Check for server errors. If the server error has the expected form, fail with more info.
     if (statusCode != 200) {
       String bodyString = body.readUtf8();

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevServerHelper.java

@@ -28,6 +28,7 @@ import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.bridge.UiThreadUtil;
 import com.facebook.react.common.ReactConstants;
 import com.facebook.react.common.network.OkHttpCallUtil;
+import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.PackagerStatusCallback;
 import com.facebook.react.devsupport.interfaces.StackFrame;
 import com.facebook.react.modules.systeminfo.AndroidInfoHelpers;

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSupportManagerFactory.java

@@ -15,6 +15,7 @@ import java.lang.reflect.Constructor;
 
 import android.content.Context;
 
+import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.DevSupportManager;
 
 /**
@@ -41,6 +42,7 @@ public class DevSupportManagerFactory {
       packagerPathForJSBundleName,
       enableOnCreate,
       null,
+      null,
       minNumShakes);
   }
 
@@ -50,6 +52,7 @@ public class DevSupportManagerFactory {
     @Nullable String packagerPathForJSBundleName,
     boolean enableOnCreate,
     @Nullable RedBoxHandler redBoxHandler,
+    @Nullable DevBundleDownloadListener devBundleDownloadListener,
     int minNumShakes) {
     if (!enableOnCreate) {
       return new DisabledDevSupportManager();
@@ -72,6 +75,7 @@ public class DevSupportManagerFactory {
           String.class,
           boolean.class,
           RedBoxHandler.class,
+          DevBundleDownloadListener.class,
           int.class);
       return (DevSupportManager) constructor.newInstance(
         applicationContext,
@@ -79,6 +83,7 @@ public class DevSupportManagerFactory {
         packagerPathForJSBundleName,
         true,
         redBoxHandler,
+        devBundleDownloadListener,
         minNumShakes);
     } catch (Exception e) {
       throw new RuntimeException(

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSupportManagerImpl.java

@@ -52,6 +52,7 @@ import com.facebook.react.common.ReactConstants;
 import com.facebook.react.common.ShakeDetector;
 import com.facebook.react.common.futures.SimpleSettableFuture;
 import com.facebook.react.devsupport.DevServerHelper.PackagerCommandListener;
+import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.DevOptionHandler;
 import com.facebook.react.devsupport.interfaces.DevSupportManager;
 import com.facebook.react.devsupport.interfaces.PackagerStatusCallback;
@@ -133,6 +134,7 @@ public class DevSupportManagerImpl implements
   private @Nullable StackFrame[] mLastErrorStack;
   private int mLastErrorCookie = 0;
   private @Nullable ErrorType mLastErrorType;
+  private @Nullable DevBundleDownloadListener mBundleDownloadListener;
 
   private static class JscProfileTask extends AsyncTask<String, Void, Void> {
     private static final MediaType JSON =
@@ -179,6 +181,7 @@ public class DevSupportManagerImpl implements
       packagerPathForJSBundleName,
       enableOnCreate,
       null,
+      null,
       minNumShakes);
   }
 
@@ -188,12 +191,14 @@ public class DevSupportManagerImpl implements
       @Nullable String packagerPathForJSBundleName,
       boolean enableOnCreate,
       @Nullable RedBoxHandler redBoxHandler,
+      @Nullable DevBundleDownloadListener devBundleDownloadListener,
       int minNumShakes) {
     mReactInstanceCommandsHandler = reactInstanceCommandsHandler;
     mApplicationContext = applicationContext;
     mJSAppBundleName = packagerPathForJSBundleName;
     mDevSettings = new DevInternalSettings(applicationContext, this);
     mDevServerHelper = new DevServerHelper(mDevSettings);
+    mBundleDownloadListener = devBundleDownloadListener;
 
     // Prepare shake gesture detector (will be started/stopped from #reload)
     mShakeDetector = new ShakeDetector(new ShakeDetector.ShakeListener() {
@@ -827,11 +832,14 @@ public class DevSupportManagerImpl implements
     mDevLoadingViewVisible = true;
 
     mDevServerHelper.getBundleDownloader().downloadBundleFromURL(
-        new BundleDownloader.DownloadCallback() {
+        new DevBundleDownloadListener() {
           @Override
           public void onSuccess() {
             mDevLoadingViewController.hide();
             mDevLoadingViewVisible = false;
+            if (mBundleDownloadListener != null) {
+              mBundleDownloadListener.onSuccess();
+            }
             UiThreadUtil.runOnUiThread(
                 new Runnable() {
                   @Override
@@ -844,12 +852,18 @@ public class DevSupportManagerImpl implements
           @Override
           public void onProgress(@Nullable final String status, @Nullable final Integer done, @Nullable final Integer total) {
             mDevLoadingViewController.updateProgress(status, done, total);
+            if (mBundleDownloadListener != null) {
+              mBundleDownloadListener.onProgress(status, done, total);
+            }
           }
 
           @Override
           public void onFailure(final Exception cause) {
             mDevLoadingViewController.hide();
             mDevLoadingViewVisible = false;
+            if (mBundleDownloadListener != null) {
+              mBundleDownloadListener.onFailure(cause);
+            }
             FLog.e(ReactConstants.TAG, "Unable to download JS bundle", cause);
             UiThreadUtil.runOnUiThread(
                 new Runnable() {

ReactAndroid/src/main/java/com/facebook/react/devsupport/interfaces/DevBundleDownloadListener.java

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package com.facebook.react.devsupport.interfaces;
+
+import javax.annotation.Nullable;
+
+public interface DevBundleDownloadListener {
+  void onSuccess();
+  void onProgress(@Nullable String status, @Nullable Integer done, @Nullable Integer total);
+  void onFailure(Exception cause);
+}