Your website convert to web app profassional app with android studio.

August 11, 2023

First Create Project And Packeg name

2nd copy this code and paste main xml

activity main xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    tools:context=".MainActivity">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/swipeRefreshLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <WebView
            android:id="@+id/webView"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    <com.airbnb.lottie.LottieAnimationView
        android:id="@+id/progress_loading"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:layout_centerInParent="true"
        android:visibility="gone"
        app:lottie_autoPlay="true"
        app:lottie_loop="true"
        app:lottie_rawRes="@raw/loading" />

    <LinearLayout
        android:id="@+id/No_Internet"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="gone"
        >
        <include layout="@layout/no_internet"/>
    </LinearLayout>

</RelativeLayout>

and mainactivity java copy this code and past

mainactivity.java

package com.bongoacademy.webview_pro;

import androidx.appcompat.app.AppCompatActivity;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;

import android.app.Activity;
import android.content.ClipData;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.view.View;
import android.webkit.CookieManager;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.airbnb.lottie.LottieAnimationView;
import com.bongoacademy.webview_pro.controller.MyControl;
import com.bongoacademy.webview_pro.controller.MyMethods;
import com.bongoacademy.webview_pro.helper.MyHelper;
import com.bongoacademy.webview_pro.helper.ChromeClient;
import com.bongoacademy.webview_pro.helper.HelloWebViewClient;
import com.bongoacademy.webview_pro.helper.MyWebDownloader;
import com.bongoacademy.webview_pro.network.NetworkStateReceiver;

import java.io.ByteArrayOutputStream;

public class MainActivity<AdRequest> extends AppCompatActivity implements NetworkStateReceiver.NetworkStateReceiverListener {


    WebView webView;

    SwipeRefreshLayout swipeRefreshLayout;
    LottieAnimationView progress_loading;
    LinearLayout no_Internet;
    TextView nonetTitle, nonetDescription;

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



        // For Internet
        MyMethods.startNetworkBroadcastReceiver(this);

        // variable initialize
        webView = findViewById(R.id.webView);
        swipeRefreshLayout = findViewById(R.id.swipeRefreshLayout);
        progress_loading = findViewById(R.id.progress_loading);
        no_Internet = findViewById(R.id.No_Internet);
        nonetTitle = findViewById(R.id.nonetTitle);
        nonetDescription = findViewById(R.id.nonetDescription);

        webView.getSettings().setUserAgentString(MyControl.USER_AGENT);
        webView.getSettings().setLoadsImagesAutomatically(true);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setAllowFileAccess(true);
        webView.getSettings().setLoadWithOverviewMode(true);
        webView.getSettings().setUseWideViewPort(true);
        webView.setWebChromeClient(new ChromeClient(MainActivity.this));
        webView.setWebViewClient(new HelloWebViewClient(MainActivity.this));
        webView.getSettings().setDomStorageEnabled(true);

        //web settings
        WebSettings webSettings = webView.getSettings();
        webSettings.setMediaPlaybackRequiresUserGesture(false);
        webSettings.setAllowContentAccess(true);
        webSettings.setDomStorageEnabled(true);

        webSettings.setSaveFormData(true);
        webSettings.setRenderPriority(WebSettings.RenderPriority.HIGH);
        webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
        webSettings.setUseWideViewPort(true);
        webSettings.setEnableSmoothTransition(true);

        webView.getSettings().setBlockNetworkLoads(false);
        webView.getSettings().setMediaPlaybackRequiresUserGesture(false);
        webView.getSettings().setDomStorageEnabled(true);

        webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
        webView.clearCache(true);
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);


        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            webView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        }



        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            webView.setWebContentsDebuggingEnabled(true);
        }

        // Enable Cookies
        CookieManager.getInstance().setAcceptCookie(true);
        if (android.os.Build.VERSION.SDK_INT >= 21) {
            CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true);
        }




        // HelloWebViewClient
        new HelloWebViewClient(new MyHelper() {
            @Override
            public void loading() {

            }

            @Override
            public void finishLoading() {

            }

            @Override
            public void webGoBack() {
                webView.goBack();
            }

            @Override
            public void webLoadUrl(String url) {
                webView.loadUrl(url);
            }

            @Override
            public void errorLoading() {
                if(MyControl.NETWORK_AVAILABLE){
                    //We have internet but something went wrong -- Show the error page
                    no_Internet.setVisibility(View.VISIBLE);
                    nonetTitle.setText("Website Load Failed");
                    nonetDescription.setText("Error Reason:\n"+MyControl.LOAD_ERROR_REASON);
                }


            }
        });




        // Handle WebLoading
        new ChromeClient(new MyHelper() {
            @Override
            public void loading() {
                progress_loading.setVisibility(View.VISIBLE);
            }

            @Override
            public void finishLoading() {
                progress_loading.setVisibility(View.GONE);
            }

            @Override
            public void webGoBack() {

            }

            @Override
            public void webLoadUrl(String url) {

            }

            @Override
            public void errorLoading() {

            }
        });




        // Handle Download Loading
        if (MyControl.isDownloading) {
            new MyWebDownloader(new MyHelper() {
                @Override
                public void loading() {
                }

                @Override
                public void finishLoading() {
                    progress_loading.setVisibility(View.GONE);
                }

                @Override
                public void webGoBack() {
                    webView.goBack();
                }

                @Override
                public void webLoadUrl(String url) {

                }

                @Override
                public void errorLoading() {

                }
            });

            MyWebDownloader.WebDownloader(webView, MainActivity.this);
        }

        // For Refresh in WebView
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                WebViewRefresh();
            }

        });


        webView.loadUrl(getString(R.string.Website_Link));


    } // OnCreate Method End Here ===================

    @Override
    public void networkAvailable() {
        MyControl.NETWORK_AVAILABLE = true;

        if (MyControl.FAILED_FOR_OTHER_REASON==false)
            no_Internet.setVisibility(View.GONE);
        else
        no_Internet.setVisibility(View.VISIBLE);
    }

    @Override
    public void networkUnavailable() {
        MyControl.NETWORK_AVAILABLE = false;
        no_Internet.setVisibility(View.VISIBLE);
        nonetTitle.setText("No Internet");
        nonetDescription.setText("Please Check Internet Connection and Try Again..");
    }

    @Override
    protected void onPause() {
        MyMethods.unregisterNetworkBroadcastReceiver(this);
        super.onPause();
    }

    @Override
    protected void onResume() {
        MyMethods.registerNetworkBroadcastReceiver(this);
        super.onResume();
    }

    //=================================================================

    private void WebViewRefresh() {
        if (!MyMethods.isConnected(MainActivity.this)) {
            swipeRefreshLayout.setVisibility(View.GONE);
            webView.setVisibility(View.GONE);
            no_Internet.setVisibility(View.VISIBLE);
        } else {
            swipeRefreshLayout.setVisibility(View.VISIBLE);
            webView.setVisibility(View.VISIBLE);
            swipeRefreshLayout.setRefreshing(true);
            no_Internet.setVisibility(View.GONE);
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    swipeRefreshLayout.setRefreshing(false);
                    webView.reload();
                }
            }, 2000);
        }

        swipeRefreshLayout.setColorSchemeColors(getResources().getColor(android.R.color.holo_blue_dark), getResources().getColor(android.R.color.holo_orange_dark), getResources().getColor(android.R.color.holo_green_dark), getResources().getColor(android.R.color.holo_red_dark));

    } // WebViewRefresh End Here ============





    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        if (Build.VERSION.SDK_INT >= 21) {
            Uri[] results = null;

            /*-- if file request cancelled; exited camera. we need to send null value to make future attempts workable --*/
            if (resultCode == Activity.RESULT_CANCELED) {
                MyControl.file_path.onReceiveValue(null);
                return;
            }

            /*-- continue if response is positive --*/
            if (resultCode == Activity.RESULT_OK) {
                if (null == MyControl.file_path) {
                    return;
                }
                ClipData clipData;
                String stringData;

                try {
                    clipData = intent.getClipData();
                    stringData = intent.getDataString();
                } catch (Exception e) {
                    clipData = null;
                    stringData = null;
                }
                if (clipData == null && stringData == null && MyControl.cam_file_data != null) {
                    results = new Uri[]{Uri.parse(MyControl.cam_file_data)};
                } else {
                    if (clipData != null) {
                        final int numSelectedFiles = clipData.getItemCount();
                        results = new Uri[numSelectedFiles];
                        for (int i = 0; i < clipData.getItemCount(); i++) {
                            results[i] = clipData.getItemAt(i).getUri();
                        }
                    } else {
                        try {
                            Bitmap cam_photo = (Bitmap) intent.getExtras().get("data");
                            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                            cam_photo.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
                            stringData = MediaStore.Images.Media.insertImage(this.getContentResolver(), cam_photo, null, null);
                        } catch (Exception ignored) {
                        }

                        results = new Uri[]{Uri.parse(stringData)};
                    }
                }
            }

            MyControl.file_path.onReceiveValue(results);
            MyControl.file_path = null;
        } else {
            if (requestCode == MyControl.file_req_code) {
                if (null == MyControl.file_data) return;
                Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
                MyControl.file_data.onReceiveValue(result);
                MyControl.file_data = null;
            }
        }

    } // onActivityResult End Here =============

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }




    private static final int TIME_INTERVAL = 2000; // # milliseconds, desired
    private long mBackPressed;

    // When user click bakpress button this method is called
    @Override
    public void onBackPressed() {

        // When landing in home screen
        if (!webView.canGoBack()) {

            if (mBackPressed + TIME_INTERVAL > System.currentTimeMillis()) {
                finishAndRemoveTask();
            } else {
                Toast.makeText(getBaseContext(), "Press again to exit",
                        Toast.LENGTH_SHORT).show();
            }

            mBackPressed = System.currentTimeMillis();

        } else{
            webView.goBack();
        }


    } // end of onBackpressed method

    //#############################################################################################







} // Public Class End Here ==========================

splash screen xml copy this code and create splash.xml and copy past code.

activity splash.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    tools:context=".SplashScreen"
    >

    <ImageView
        android:id="@+id/splash_logo"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_centerInParent="true"
        android:src="@mipmap/ic_launcher"
        android:padding="12dp"
        />

    <TextView
        android:id="@+id/splash_name"
        android:layout_below="@id/splash_logo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/app_name"
        android:gravity="center"
        android:textColor="@android:color/black"
        android:textSize="20sp"
        android:fontFamily="@font/kalpurush"
        android:textStyle="bold"
        />

</RelativeLayout>

splashscreen.java

package com.bongoacademy.webview_pro;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class SplashScreen extends AppCompatActivity {

    Animation Splash_top,Splash_bottom;
    ImageView splash_logo;
    TextView splash_name;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash_screen);

        splash_logo = findViewById(R.id.splash_logo);
        splash_name = findViewById(R.id.splash_name);

        Splash_top = AnimationUtils.loadAnimation(this, R.anim.top_anim);
        Splash_bottom = AnimationUtils.loadAnimation(this, R.anim.bottom_anim);

        splash_logo.setAnimation(Splash_top);
        splash_name.setAnimation(Splash_bottom);


        //For Splash Screen
        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                //Code here

                Intent myIntent = new Intent(SplashScreen.this, MainActivity.class);
                startActivity(myIntent);
                finish();

            }
        },3000);


    } // OnCreate Method End Here =================


} // Public Class End Here ========================

no internet.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layoutDialogContainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFFFFF"
    >


    <LinearLayout
        android:id="@+id/relativeLayout"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="60dp"
        android:layout_marginEnd="30dp"
        android:orientation="vertical"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:padding="5dp"
        >

        <TextView

            android:paddingTop="40dp"
            android:paddingBottom="20dp"
            android:paddingRight="5dp"
            android:paddingLeft="5dp"
            android:id="@+id/nonetTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/exit_title_bg"
            android:gravity="center"
            android:text="No Internet"
            android:textColor="#B0000000"
            android:textSize="18sp"
            android:textStyle="bold"
            />


        <TextView
            android:id="@+id/nonetDescription"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="12dp"
            android:layout_marginRight="5dp"
            android:layout_marginBottom="12dp"
            android:gravity="center"
            android:paddingBottom="12dp"
            android:text="Please Check Internet Connection and Try Again.."
            android:textColor="#99000000"
            android:textSize="14sp"
            android:textStyle="normal"
            />




    </LinearLayout>










    <ImageView
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:src="@drawable/ic_lancher"
        app:layout_constraintBottom_toTopOf="@+id/relativeLayout"
        app:layout_constraintEnd_toEndOf="@+id/relativeLayout"
        app:layout_constraintStart_toStartOf="@+id/relativeLayout"
        app:layout_constraintTop_toTopOf="@+id/relativeLayout"
        />


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:background="#4F000000"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toBottomOf="@id/relativeLayout"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="0dp"
        >


        <!-- 2D Game offline -->
        <com.lionzxy.trex_offline.TRexOfflineView
            android:id="@+id/trexOffline"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            />


    </LinearLayout>








</androidx.constraintlayout.widget.ConstraintLayout>

comming soon...

source code

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