Back out "[react-native][PR] Android - Add a ReactFragment"

Summary: Original commit changeset: b50b708cde45

Reviewed By: mdvacca

Differential Revision: D14792438

fbshipit-source-id: c5e0b5f7663fe70110f73ae94a6fa99388f87ae3

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

@@ -15,9 +15,10 @@ import android.view.KeyEvent;
 
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.bridge.Callback;
+import com.facebook.react.devsupport.DoubleTapReloadRecognizer;
+import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
 import com.facebook.react.modules.core.PermissionListener;
 
-import com.facebook.react.uimanager.RootView;
 import javax.annotation.Nullable;
 
 /**
@@ -30,10 +31,10 @@ public class ReactActivityDelegate {
   private final @Nullable Activity mActivity;
   private final @Nullable String mMainComponentName;
 
+  private @Nullable ReactRootView mReactRootView;
+  private @Nullable DoubleTapReloadRecognizer mDoubleTapReloadRecognizer;
   private @Nullable PermissionListener mPermissionListener;
   private @Nullable Callback mPermissionsCallback;
-  private ReactDelegate mReactDelegate;
-
 
   @Deprecated
   public ReactActivityDelegate(Activity activity, @Nullable String mainComponentName) {
@@ -51,7 +52,7 @@ public class ReactActivityDelegate {
   }
 
   protected ReactRootView createRootView() {
-    return mReactDelegate.createRootView();
+    return new ReactRootView(getContext());
   }
 
   /**
@@ -66,7 +67,7 @@ public class ReactActivityDelegate {
   }
 
   public ReactInstanceManager getReactInstanceManager() {
-    return mReactDelegate.getReactInstanceManager();
+    return getReactNativeHost().getReactInstanceManager();
   }
 
   public String getMainComponentName() {
@@ -75,24 +76,36 @@ public class ReactActivityDelegate {
 
   protected void onCreate(Bundle savedInstanceState) {
     String mainComponentName = getMainComponentName();
-    mReactDelegate = new ReactDelegate(getPlainActivity(), getReactNativeHost(), mainComponentName, getLaunchOptions());
-    if (mMainComponentName != null) {
-      mReactDelegate.loadApp();
-      getPlainActivity().setContentView(mReactDelegate.getReactRootView());
+    if (mainComponentName != null) {
+      loadApp(mainComponentName);
     }
+    mDoubleTapReloadRecognizer = new DoubleTapReloadRecognizer();
   }
 
   protected void loadApp(String appKey) {
-    mReactDelegate.loadApp(appKey);
-    getPlainActivity().setContentView(mReactDelegate.getReactRootView());
+    if (mReactRootView != null) {
+      throw new IllegalStateException("Cannot loadApp while app is already running.");
+    }
+    mReactRootView = createRootView();
+    mReactRootView.startReactApplication(
+      getReactNativeHost().getReactInstanceManager(),
+      appKey,
+      getLaunchOptions());
+    getPlainActivity().setContentView(mReactRootView);
   }
 
   protected void onPause() {
-    mReactDelegate.onHostPause();
+    if (getReactNativeHost().hasInstance()) {
+      getReactNativeHost().getReactInstanceManager().onHostPause(getPlainActivity());
+    }
   }
 
   protected void onResume() {
-    mReactDelegate.onHostResume();
+    if (getReactNativeHost().hasInstance()) {
+      getReactNativeHost().getReactInstanceManager().onHostResume(
+        getPlainActivity(),
+        (DefaultHardwareBackBtnHandler) getPlainActivity());
+    }
 
     if (mPermissionsCallback != null) {
       mPermissionsCallback.invoke();
@@ -101,11 +114,20 @@ public class ReactActivityDelegate {
   }
 
   protected void onDestroy() {
-    mReactDelegate.onHostDestroy();
+    if (mReactRootView != null) {
+      mReactRootView.unmountReactApplication();
+      mReactRootView = null;
+    }
+    if (getReactNativeHost().hasInstance()) {
+      getReactNativeHost().getReactInstanceManager().onHostDestroy(getPlainActivity());
+    }
   }
 
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
-    mReactDelegate.onActivityResult(requestCode, resultCode, data, true);
+    if (getReactNativeHost().hasInstance()) {
+      getReactNativeHost().getReactInstanceManager()
+        .onActivityResult(getPlainActivity(), requestCode, resultCode, data);
+    }
   }
 
   public boolean onKeyDown(int keyCode, KeyEvent event) {
@@ -119,7 +141,19 @@ public class ReactActivityDelegate {
   }
 
   public boolean onKeyUp(int keyCode, KeyEvent event) {
-    return mReactDelegate.shouldShowDevMenuOrReload(keyCode, event);
+    if (getReactNativeHost().hasInstance() && getReactNativeHost().getUseDeveloperSupport()) {
+      if (keyCode == KeyEvent.KEYCODE_MENU) {
+        getReactNativeHost().getReactInstanceManager().showDevOptionsDialog();
+        return true;
+      }
+      boolean didDoubleTapR = Assertions.assertNotNull(mDoubleTapReloadRecognizer)
+        .didDoubleTapR(keyCode, getPlainActivity().getCurrentFocus());
+      if (didDoubleTapR) {
+        getReactNativeHost().getReactInstanceManager().getDevSupportManager().handleReloadJS();
+        return true;
+      }
+    }
+    return false;
   }
 
   public boolean onKeyLongPress(int keyCode, KeyEvent event) {
@@ -133,7 +167,11 @@ public class ReactActivityDelegate {
   }
 
   public boolean onBackPressed() {
-    return mReactDelegate.onBackPressed();
+    if (getReactNativeHost().hasInstance()) {
+      getReactNativeHost().getReactInstanceManager().onBackPressed();
+      return true;
+    }
+    return false;
   }
 
   public boolean onNewIntent(Intent intent) {