Do not use reflection to load Flipper on RN Tester

Summary:
I'm applying the same fix I applied to the Template.
This allows us to load Flipper without using reflection on RN Tester.

Changelog:
[Internal] [Changed] - Do not use reflection to load Flipper on RN Tester

Reviewed By: cipolleschi

Differential Revision: D38745404

fbshipit-source-id: c17fbd74df31441467e448f21c35171a7f2532ff

packages/rn-tester/android/app/src/main/java/com/facebook/react/uiapp/RNTesterApplication.java

@@ -8,11 +8,9 @@
 package com.facebook.react.uiapp;
 
 import android.app.Application;
-import android.content.Context;
 import androidx.annotation.NonNull;
 import com.facebook.fbreact.specs.SampleTurboModule;
 import com.facebook.react.ReactApplication;
-import com.facebook.react.ReactInstanceManager;
 import com.facebook.react.ReactNativeHost;
 import com.facebook.react.ReactPackage;
 import com.facebook.react.TurboReactPackage;
@@ -27,7 +25,6 @@ import com.facebook.react.uiapp.component.MyNativeViewManager;
 import com.facebook.react.uimanager.ViewManager;
 import com.facebook.react.views.text.ReactFontManager;
 import com.facebook.soloader.SoLoader;
-import java.lang.reflect.InvocationTargetException;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
@@ -126,42 +123,11 @@ public class RNTesterApplication extends Application implements ReactApplication
     super.onCreate();
     SoLoader.init(this, /* native exopackage */ false);
     SoLoader.loadLibrary(BuildConfig.DYNAMIC_LIBRARY_NAME);
-    initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
+    ReactNativeFlipper.initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
   }
 
   @Override
   public ReactNativeHost getReactNativeHost() {
     return mReactNativeHost;
   }
-
-  /**
-   * Loads Flipper in React Native templates. Call this in the onCreate method with something like
-   * initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
-   *
-   * @param context
-   * @param reactInstanceManager
-   */
-  private static void initializeFlipper(
-      final Context context, final ReactInstanceManager reactInstanceManager) {
-    if (BuildConfig.DEBUG) {
-      try {
-        /*
-         We use reflection here to pick up the class that initializes Flipper,
-        since Flipper library is not available in release mode
-        */
-        final Class<?> aClass = Class.forName("com.facebook.react.uiapp.ReactNativeFlipper");
-        aClass
-            .getMethod("initializeFlipper", Context.class, ReactInstanceManager.class)
-            .invoke(null, context, reactInstanceManager);
-      } catch (final ClassNotFoundException e) {
-        e.printStackTrace();
-      } catch (final NoSuchMethodException e) {
-        e.printStackTrace();
-      } catch (final IllegalAccessException e) {
-        e.printStackTrace();
-      } catch (final InvocationTargetException e) {
-        e.printStackTrace();
-      }
-    }
-  }
 };

packages/rn-tester/android/app/src/release/java/com/facebook/react/uiapp/ReactNativeFlipper.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.uiapp;
+
+import android.content.Context;
+import com.facebook.react.ReactInstanceManager;
+
+/**
+ * Class responsible of loading Flipper inside your React Native application. This is the release
+ * flavor of it so it's empty as we don't want to load Flipper.
+ */
+public class ReactNativeFlipper {
+  public static void initializeFlipper(Context context, ReactInstanceManager reactInstanceManager) {
+    // Do nothing as we don't want to initialize Flipper on Release.
+  }
+}