Convert your Website into Professional Android App Using Android Studio

Summary: Learn how to convert any website into a professional Android application using Android Studio. Get the complete step-by-step developer guide and source code download.

Convert your Website into Professional Android App Using Android Studio Source code Download Free.

1. 1. WebView Android App Code:
2. 2. Internet Connection Error:
3. 3. Back & Exit Feature:
4. 4. Swipe Down to Refresh:
5. 5. Screen Rotation:
6. How To Create Splash Screen In Android Studio Java Code
7. MainActivity. java last file if you have any error copy this code finally

1. WebView Android App Code:

Activity_Main.xml

<WebView
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:id="@+id/webView"
  android:layout_alignParentTop="true"
  android:layout_alignParentLeft="true"
  android:layout_alignParentStart="true"
  android:layout_alignParentBottom="true"
  android:layout_alignParentRight="true"
  android:layout_alignParentEnd="true"
  tools:ignore="MissingConstraints" />

MainActivity.java

import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

  String websiteURL = "https://coupon.technovedant.com/"; // sets web url
  private WebView webview;

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

    //Webview stuff
    webview = findViewById(R.id.webView);
    webview.getSettings().setJavaScriptEnabled(true);
    webview.getSettings().setDomStorageEnabled(true);
    webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
    webview.loadUrl(websiteURL);
    webview.setWebViewClient(new WebViewClientDemo());

  }

  private class WebViewClientDemo extends WebViewClient {
    @Override
    //Keep webview in app when clicking links
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
      view.loadUrl(url);
      return true;
    }
  }

}

AndroidManifest.xml

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

2. Internet Connection Error:

AndroidManifest.xml

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

MainActivity.java

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

  String websiteURL = "https://coupon.technovedant.com/"; // sets web url
  private WebView webview;

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

    if( ! CheckNetwork.isInternetAvailable(this)) //returns true if internet available
    {
      //if there is no internet do this
      setContentView(R.layout.activity_main);
      //Toast.makeText(this,"No Internet Connection, Chris",Toast.LENGTH_LONG).show();

      new AlertDialog.Builder(this) //alert the person knowing they are about to close
          .setTitle("No internet connection available")
          .setMessage("Please Check you're Mobile data or Wifi network.")
          .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
              finish();
            }
          })
          //.setNegativeButton("No", null)
          .show();

    }
    else
    {
      //Webview stuff
      webview = findViewById(R.id.webView);
      webview.getSettings().setJavaScriptEnabled(true);
      webview.getSettings().setDomStorageEnabled(true);
      webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
      webview.loadUrl(websiteURL);
      webview.setWebViewClient(new WebViewClientDemo());

    }
  }


  private class WebViewClientDemo extends WebViewClient {
    @Override
    //Keep webview in app when clicking links
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
      view.loadUrl(url);
      return true;
    }
  }


}

class CheckNetwork {

  private static final String TAG = CheckNetwork.class.getSimpleName();

  public static boolean isInternetAvailable(Context context)
  {
    NetworkInfo info = (NetworkInfo) ((ConnectivityManager)
        context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();

    if (info == null)
    {
      Log.d(TAG,"no internet connection");
      return false;
    }
    else
    {
      if(info.isConnected())
      {
        Log.d(TAG," internet connection available...");
        return true;
      }
      else
      {
        Log.d(TAG," internet connection");
        return true;
      }

    }
  }
}

3. Back & Exit Feature:

MainActivity.java

//set back button functionality
@Override
public void onBackPressed() { //if user presses the back button do this
  if (webview.isFocused() && webview.canGoBack()) { //check if in webview and the user can go back
    webview.goBack(); //go back in webview
  } else { //do this if the webview cannot go back any further

    new AlertDialog.Builder(this) //alert the person knowing they are about to close
        .setTitle("EXIT")
        .setMessage("Are you sure. You want to close this app?")
        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
            finish();
          }
        })
        .setNegativeButton("No", null)
        .show();
  }
}

4. Swipe Down to Refresh:

activity_main.xml

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

  <WebView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/webView"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true"
    tools:ignore="MissingConstraints" />

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

MainActivity.java

SwipeRefreshLayout mySwipeRefreshLayout;

//Swipe to refresh functionality
mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer);

mySwipeRefreshLayout.setOnRefreshListener(
    new SwipeRefreshLayout.OnRefreshListener() {
      @Override
      public void onRefresh() {
        webview.reload();
      }
    }
);

private class WebViewClientDemo extends WebViewClient {
  @Override
  //Keep webview in app when clicking links
  public boolean shouldOverrideUrlLoading(WebView view, String url) {
    view.loadUrl(url);
    return true;
  }
  @Override
  public void onPageFinished(WebView view, String url) {
    super.onPageFinished(view, url);
    mySwipeRefreshLayout.setRefreshing(false);
  }
}

5. Screen Rotation:

AndroidManifest.xml

android:screenOrientation="portrait">

How To Create Splash Screen In Android Studio Java Code

How To Create Splash Screen In Android Studio Java source Code download free

SplashActivity.java

  import androidx.appcompat.app.AppCompatActivity;


  import android.content.Intent;

  import android.os.Bundle;

  import android.view.Window;

  import android.view.WindowManager;


  public class SplashActivity extends AppCompatActivity {


    @Override

    protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);


      Window window = getWindow() ;


      window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

      setContentView(R.layout.activity_splash);




      Thread splashTread = new Thread(){


        @Override

        public void run() {

          try {

            sleep(3000);

            startActivity(new Intent(getApplicationContext(),MainActivity.class));

            finish();

          } catch (InterruptedException e) {

            e.printStackTrace();

          }


          super.run();

        }

      };


      splashTread.start();





    }


  }

activity_splash

  <?xml version="1.0" encoding="utf-8"?>

  <LinearLayout 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:orientation="vertical"

    tools:context=".SplashActivity">


    <ImageView

      android:layout_width="match_parent"

      android:layout_height="300dp"

      android:src="@drawable/logo"

      android:scaleType="centerCrop"

      android:padding="50dp"

      android:layout_marginTop="220dp"/>

    <ProgressBar

      android:layout_width="220dp"

      android:layout_height="10dp"

      android:layout_gravity="center_horizontal"

      style="?android:attr/progressBarStyleHorizontal"

      android:max="100"

      android:indeterminate="true"

      android:progress="0"

      android:layout_marginTop="100dp"


      />



  </LinearLayout>

AndroidManifest.xml

 <!-- SplashActivity should be launcher -->
    <activity
      android:name=".SplashActivity"
      android:exported="true"
      android:screenOrientation="portrait">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>

    <activity
      android:name=".MainActivity"
      android:exported="false"
      android:screenOrientation="portrait" />

MainActivity. java last file if you have any error copy this code finally

MainActivity.java

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;

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

public class MainActivity extends AppCompatActivity {

  String websiteURL = "https://youtube.com/technicalsangrah"; // sets web url
  private WebView webview;
  SwipeRefreshLayout mySwipeRefreshLayout;

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

    if( ! CheckNetwork.isInternetAvailable(this)) //returns true if internet available
    {
      //if there is no internet do this
      setContentView(R.layout.activity_main);
      //Toast.makeText(this,"No Internet Connection, Chris",Toast.LENGTH_LONG).show();

      new AlertDialog.Builder(this) //alert the person knowing they are about to close
          .setTitle("No internet connection available")
          .setMessage("Please Check you're Mobile data or Wifi network.")
          .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
              finish();
            }
          })
          //.setNegativeButton("No", null)
          .show();

    }
    else
    {
      //Webview stuff
      webview = findViewById(R.id.webView);
      webview.getSettings().setJavaScriptEnabled(true);
      webview.getSettings().setDomStorageEnabled(true);
      webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
      webview.loadUrl(websiteURL);
      webview.setWebViewClient(new WebViewClientDemo());

    }

    //Swipe to refresh functionality
    mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer);

    mySwipeRefreshLayout.setOnRefreshListener(
        new SwipeRefreshLayout.OnRefreshListener() {
          @Override
          public void onRefresh() {
            webview.reload();
          }
        }
    );

  }


  private class WebViewClientDemo extends WebViewClient {
    @Override
    //Keep webview in app when clicking links
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
      view.loadUrl(url);
      return true;
    }
    @Override
    public void onPageFinished(WebView view, String url) {
      super.onPageFinished(view, url);
      mySwipeRefreshLayout.setRefreshing(false);
    }
  }

  //set back button functionality
  @Override
  public void onBackPressed() { //if user presses the back button do this
    if (webview.isFocused() && webview.canGoBack()) { //check if in webview and the user can go back
      webview.goBack(); //go back in webview
    } else { //do this if the webview cannot go back any further

      new AlertDialog.Builder(this) //alert the person knowing they are about to close
          .setTitle("EXIT")
          .setMessage("Are you sure. You want to close this app?")
          .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
              finish();
            }
          })
          .setNegativeButton("No", null)
          .show();
    }
  }

}

class CheckNetwork {

  private static final String TAG = CheckNetwork.class.getSimpleName();

  public static boolean isInternetAvailable(Context context)
  {
    NetworkInfo info = (NetworkInfo) ((ConnectivityManager)
        context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();

    if (info == null)
    {
      Log.d(TAG,"no internet connection");
      return false;
    }
    else
    {
      if(info.isConnected())
      {
        Log.d(TAG," internet connection available...");
        return true;
      }
      else
      {
        Log.d(TAG," internet connection");
        return true;
      }

    }
  }
}

Convert your Website into Professional Android App Using Android Studio

Table of Contents

1. WebView Android App Code:

2. Internet Connection Error:

3. Back & Exit Feature:

4. Swipe Down to Refresh:

5. Screen Rotation:

How To Create Splash Screen In Android Studio Java Code

MainActivity. java last file if you have any error copy this code finally

AsheeshKG

Convert your Website into Professional Android App Using Android Studio

Table of Contents

1. WebView Android App Code:

2. Internet Connection Error:

3. Back & Exit Feature:

4. Swipe Down to Refresh:

5. Screen Rotation:

How To Create Splash Screen In Android Studio Java Code

MainActivity. java last file if you have any error copy this code finally

AsheeshKG

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