react-native example: restore Android .java classes, remove Kotlin

Author: perf2711

examples/sdk/reactNative/android/app/build.gradle

@@ -1,5 +1,4 @@
 apply plugin: "com.android.application"
-apply plugin: "org.jetbrains.kotlin.android"
 apply plugin: "com.facebook.react"
 
 /**

examples/sdk/reactNative/android/app/src/main/java/com/reactnative/BacktraceDemoPackage.java

@@ -0,0 +1,27 @@
+package com.reactnative;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class BacktraceDemoPackage implements ReactPackage {
+  @Override
+  public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+    return Collections.emptyList();
+  }
+
+  @Override
+  public List<NativeModule> createNativeModules(
+      ReactApplicationContext reactContext) {
+    List<NativeModule> modules = new ArrayList<>();
+
+    modules.add(new ErrorGenerator(reactContext));
+
+    return modules;
+  }
+}

examples/sdk/reactNative/android/app/src/main/java/com/reactnative/ErrorGenerator.java

@@ -0,0 +1,41 @@
+package com.reactnative;
+
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+import android.util.Log;
+
+public class ErrorGenerator extends ReactContextBaseJavaModule {
+  ErrorGenerator(ReactApplicationContext context) {
+    super(context);
+  }
+
+  @Override
+  public String getName() {
+    return "ErrorGenerator";
+  }
+
+  @ReactMethod
+  public void test() {
+    Log.d("dupa", "biskupa");
+    return;
+  }
+
+  @ReactMethod
+  public void throwError() throws IOException {
+    readUserConfiguration();
+  }
+
+  private void readUserConfiguration() throws IOException {
+    // I know for sure this file is there (spoiler alert, it's not)
+    File mConfiguration = new File("configuration.json");
+    FileReader mConfigurationDataReader = new FileReader(mConfiguration);
+    char[] configurationDataBuffer = new char[255];
+    mConfigurationDataReader.read(configurationDataBuffer);
+  }
+}

examples/sdk/reactNative/android/app/src/main/java/com/reactnative/MainActivity.java

@@ -0,0 +1,32 @@
+package com.reactnative;
+
+import com.facebook.react.ReactActivity;
+import com.facebook.react.ReactActivityDelegate;
+import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint;
+import com.facebook.react.defaults.DefaultReactActivityDelegate;
+
+public class MainActivity extends ReactActivity {
+
+  /**
+   * Returns the name of the main component registered from JavaScript. This is used to schedule
+   * rendering of the component.
+   */
+  @Override
+  protected String getMainComponentName() {
+    return "reactNative";
+  }
+
+  /**
+   * Returns the instance of the {@link ReactActivityDelegate}. Here we use a util class {@link
+   * DefaultReactActivityDelegate} which allows you to easily enable Fabric and Concurrent React
+   * (aka React 18) with two boolean flags.
+   */
+  @Override
+  protected ReactActivityDelegate createReactActivityDelegate() {
+    return new DefaultReactActivityDelegate(
+        this,
+        getMainComponentName(),
+        // If you opted-in for the New Architecture, we enable the Fabric Renderer.
+        DefaultNewArchitectureEntryPoint.getFabricEnabled());
+  }
+}

examples/sdk/reactNative/android/app/src/main/java/com/reactnative/MainActivity.kt

@@ -0,0 +1,62 @@
+package com.reactnative;
+
+import android.app.Application;
+import com.facebook.react.PackageList;
+import com.facebook.react.ReactApplication;
+import com.facebook.react.ReactNativeHost;
+import com.facebook.react.ReactPackage;
+import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint;
+import com.facebook.react.defaults.DefaultReactNativeHost;
+import com.facebook.soloader.SoLoader;
+import java.util.List;
+
+public class MainApplication extends Application implements ReactApplication {
+
+  private final ReactNativeHost mReactNativeHost = new DefaultReactNativeHost(this) {
+    @Override
+    public boolean getUseDeveloperSupport() {
+      return BuildConfig.DEBUG;
+    }
+
+    @Override
+    protected List<ReactPackage> getPackages() {
+      @SuppressWarnings("UnnecessaryLocalVariable")
+      List<ReactPackage> packages = new PackageList(this).getPackages();
+      // Packages that cannot be autolinked yet can be added manually here, for
+      // example:
+      packages.add(new BacktraceDemoPackage());
+      return packages;
+    }
+
+    @Override
+    protected String getJSMainModuleName() {
+      return "index";
+    }
+
+    @Override
+    protected boolean isNewArchEnabled() {
+      return BuildConfig.IS_NEW_ARCHITECTURE_ENABLED;
+    }
+
+    @Override
+    protected Boolean isHermesEnabled() {
+      return BuildConfig.IS_HERMES_ENABLED;
+    }
+  };
+
+  @Override
+  public ReactNativeHost getReactNativeHost() {
+    return mReactNativeHost;
+  }
+
+  @Override
+  public void onCreate() {
+    super.onCreate();
+    SoLoader.init(this, /* native exopackage */ false);
+    if (BuildConfig.IS_NEW_ARCHITECTURE_ENABLED) {
+      // If you opted-in for the New Architecture, we load the native entry point for
+      // this app.
+      DefaultNewArchitectureEntryPoint.load();
+    }
+  }
+}

examples/sdk/reactNative/android/app/src/main/java/com/reactnative/MainApplication.java

@@ -5,7 +5,6 @@ buildscript {
         compileSdkVersion = 34
         targetSdkVersion = 34
         ndkVersion = "26.1.10909125"
-        kotlinVersion = "1.9.24"
     }
     repositories {
         google()
@@ -14,7 +13,6 @@ buildscript {
     dependencies {
         classpath("com.android.tools.build:gradle")
         classpath("com.facebook.react:react-native-gradle-plugin")
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin")
     }
 }