I'll provide a detailed step-by-step guide to converting a website into an Android app using Android Studio, covering all the requested features. Below is an overview of the steps involved:

Steps to Convert a Website into an Android App Using Android Studio

1. Set Up Android Studio
2. Create a New Android Project
3. Modify Manifest Permissions
4. Add a WebView to Load the Website
5. Implement a Splash Screen
6. Add a Progress Bar
7. Enable Offline Support
8. Implement Push Notifications
9. Customize Navigation Bar & Status Bar
10. Prepare for Publishing on Google Play
11. Build & Release the APK/AAB

Step 1: Set Up Android Studio

1. Download and install Android Studio.
2. Ensure you have the latest SDK and necessary dependencies installed.

Step 2: Create a New Android Project

1. Open Android Studio → Click on "New Project".

2. Select "Empty Activity" and click Next.

3. Enter:

   • App Name: Your App Name
   • Package Name: com.yourdomain.app
   • Save Location: Choose your folder location
   • Language: Java/Kotlin
   • Minimum SDK: Choose at least API 21 (Lollipop)

4. Click Finish to create the project.

Step 3: Modify Manifest Permissions

Edit the AndroidManifest.xml file (Location: app/src/main/AndroidManifest.xml) to add necessary permissions:

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

Inside the <application> tag, add:

<usesCleartextTraffic="true"/>
<activity android:name=".MainActivity"
    android:theme="@style/Theme.AppCompat.Light.NoActionBar">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

Step 4: Add a WebView to Load the Website

1. Open res/layout/activity_main.xml (Location: app/src/main/res/layout/activity_main.xml).
2. Replace existing content with:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:visibility="gone"/>

    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

3. Open MainActivity.java (Location: app/src/main/java/com/yourdomain/app/MainActivity.java).
4. Modify the file as follows:

package com.yourdomain.app;

import android.annotation.SuppressLint;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceRequest;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    private WebView webView;
    private ProgressBar progressBar;

    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        webView = findViewById(R.id.webView);
        progressBar = findViewById(R.id.progressBar);

        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setDomStorageEnabled(true);
        webView.getSettings().setLoadWithOverviewMode(true);
        webView.getSettings().setUseWideViewPort(true);
        webView.getSettings().setSupportZoom(true);
        webView.setWebChromeClient(new WebChromeClient());

        webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                progressBar.setVisibility(View.VISIBLE);
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                progressBar.setVisibility(View.GONE);
            }
        });

        webView.loadUrl("https://yourwebsite.com");
    }
}

Step 5: Implement a Splash Screen

1. Open res/values/styles.xml (Location: app/src/main/res/values/styles.xml) and add:

<style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:background">@drawable/splash_screen</item>
</style>

2. Create a new SplashActivity.java (Location: app/src/main/java/com/yourdomain/app/SplashActivity.java):

package com.yourdomain.app;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import androidx.appcompat.app.AppCompatActivity;

public class SplashActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        new Handler().postDelayed(() -> {
            startActivity(new Intent(SplashActivity.this, MainActivity.class));
            finish();
        }, 3000);
    }
}

3. Update AndroidManifest.xml:

<activity android:name=".SplashActivity"
    android:theme="@style/SplashTheme">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

Step 6: Enable Offline Support

Modify MainActivity.java:

webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);

Step 7: Implement Push Notifications

1. Use Firebase Cloud Messaging (FCM).
2. Follow the Firebase setup at Firebase Console.
3. Add Firebase dependencies in build.gradle (Module: app).
4. Implement Firebase Messaging Service.

Step 8: Customize Navigation Bar & Status Bar

In styles.xml:

<item name="android:navigationBarColor">#000000</item>
<item name="android:statusBarColor">#FFFFFF</item>

Modify MainActivity.java:

getWindow().setNavigationBarColor(Color.BLACK);
getWindow().setStatusBarColor(Color.WHITE);

Step 9: Publish Your App

1. Generate a signed APK/AAB in Android Studio.
2. Follow the Play Store submission process.

Folder Locations in Android Studio

• Java Code: app/src/main/java/com/yourdomain/app/
• Layouts: app/src/main/res/layout/
• Manifest File: app/src/main/AndroidManifest.xml
• Drawable (Icons/Images): app/src/main/res/drawable/
• Styles & Themes: app/src/main/res/values/styles.xml

This guide provides a complete step-by-step approach to converting a website into an Android app with key features like splash screens, progress bars, offline support, and push notifications. Would you like additional customization?