Improve Documentation for RNN Installation (#8042)

* Converted a MainActivity and MainApplication to kotlin.
Refined installation documentation

* Added swift documentation

* Fixes after PR

Author: gosha212

lib/android/app/src/main/java/com/reactnativenavigation/NavigationApplication.java

@@ -4,6 +4,7 @@
 
 import com.facebook.react.ReactApplication;
 import com.facebook.react.ReactNativeHost;
+import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint;
 import com.facebook.react.soloader.OpenSourceMergedSoMapping;
 import com.facebook.soloader.SoLoader;
 import com.reactnativenavigation.react.ReactGateway;
@@ -40,6 +41,9 @@ public void onCreate() {
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
+
+        DefaultNewArchitectureEntryPoint.load();
+
         reactGateway = createReactGateway();
 	}
 

playground/android/app/build.gradle

@@ -1,5 +1,6 @@
 apply plugin: "com.android.application"
 apply plugin: "com.facebook.react"
+apply plugin: 'org.jetbrains.kotlin.android'
 
 react {
     root = file("../../../")
@@ -48,6 +49,9 @@ android {
             signingConfig signingConfigs.release
         }
     }
+    kotlinOptions {
+        jvmTarget = '17'
+    }
 }
 
 dependencies {
@@ -59,6 +63,7 @@ dependencies {
     implementation project(':react-native-fast-image')
 
     implementation project(':react-native-navigation')
+    implementation 'androidx.core:core-ktx:1.16.0'
 
     androidTestImplementation('com.wix:detox:+') { transitive = true }
     androidTestImplementation 'junit:junit:4.12'

playground/android/app/src/main/java/com/reactnativenavigation/playground/MainActivity.java

@@ -0,0 +1,18 @@
+package com.reactnativenavigation.playground
+
+import android.os.Bundle
+import android.widget.ImageView
+import com.reactnativenavigation.NavigationActivity
+
+class MainActivity : NavigationActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setSplashLayout()
+    }
+
+    private fun setSplashLayout() {
+        val img = ImageView(this)
+        img.setImageDrawable(getDrawable(R.drawable.ic_android))
+        setContentView(img)
+    }
+}

playground/android/app/src/main/java/com/reactnativenavigation/playground/MainActivity.kt

@@ -0,0 +1,46 @@
+package com.reactnativenavigation.playground
+
+import com.facebook.react.PackageList
+import com.facebook.react.ReactHost
+import com.facebook.react.ReactNativeHost
+import com.facebook.react.ReactPackage
+import com.facebook.react.defaults.DefaultReactHost.getDefaultReactHost
+import com.reactnativenavigation.NavigationApplication
+import com.reactnativenavigation.RNNToggles
+import com.reactnativenavigation.react.NavigationPackage
+import com.reactnativenavigation.react.NavigationReactNativeHost
+
+class MainApplication : NavigationApplication(mapOf(
+        RNNToggles.TOP_BAR_COLOR_ANIMATION__PUSH to true,
+        RNNToggles.TOP_BAR_COLOR_ANIMATION__TABS to true
+)) {
+    override val reactNativeHost: ReactNativeHost = object : NavigationReactNativeHost(this) {
+        override fun getJSMainModuleName(): String {
+            return "index"
+        }
+
+        override fun getUseDeveloperSupport(): Boolean {
+            return BuildConfig.DEBUG
+        }
+
+        public override fun getPackages(): List<ReactPackage> {
+            val packages = PackageList(this).packages
+            packages.add(NavigationPackage())
+            return packages
+        }
+
+        override val isHermesEnabled: Boolean
+            get() = BuildConfig.IS_HERMES_ENABLED
+
+        override val isNewArchEnabled: Boolean
+            get() = BuildConfig.IS_NEW_ARCHITECTURE_ENABLED
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+        registerExternalComponent("RNNCustomComponent", FragmentCreator())
+    }
+
+    override val reactHost: ReactHost
+        get() = getDefaultReactHost(this, reactNativeHost)
+}

playground/android/app/src/main/java/com/reactnativenavigation/playground/MainApplication.java

@@ -33,6 +33,7 @@ allprojects {
         flatDir {
             dirs "$rootProject.projectDir/libs"
         }
+        mavenCentral()
     }
 }