Step 1 : First you need to open Android Studio Software and Click on "Create New Project"
Step 2 :  After clicking on Create New Project , now select an empty activity !
Step 3 : now write your App Name and your App package name in the boxes below , remember your package name must be unique because your package name is your Application id ,after filling that boxes click on Finish button
Step 4 : Now delete all code's from your android studio activity_main.xml then copy and paste that all code below ,
Activity_Main.XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <WebView
        android:id="@+id/webView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true" />
    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />
</RelativeLayout>
Step 5 :  Now open MainActivity.java file on your Android studio Project and add all variables inside the class
public class MainActivity  extends AppCompatActivity{
//Variables paste here
} 
Variables
 private WebView mywebView;
 ProgressBar progressBar;
 String url = "https://google.com";
Step 6 :  now go to in your onCreate method and paste all code below,
MainActivity.java
mywebView = findViewById(R.id.webView);
        progressBar = findViewById(R.id.progressBar);
        mywebView.setWebViewClient(new notreWebView());
        mywebView.getSettings().setJavaScriptEnabled(true);
        mywebView.getSettings().setBuiltInZoomControls(true);
        mywebView.getSettings().setDisplayZoomControls(false);
        mywebView.loadUrl(url);
    }
    public class notreWebView extends WebViewClient {
        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
        }
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            progressBar.setVisibility(View.VISIBLE);
            view.loadUrl(url);
            return true;
        }
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            progressBar.setVisibility(View.GONE);
        }}
    @Override
    public void onBackPressed() {
        if (mywebView.canGoBack()) {
            mywebView.goBack();
        } else {
            super.onBackPressed();
        }
Step 7: To load your Website in your App you need to add internet permission in AndroidManifest.xml 
AndroidManifest.xml
 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Finally your App is now ready , now you can install / build your App 
