Menggunakan WebView di Android Studio

Pada postingan kali ini saya akan berbagi tentang cara penggunaan webview di android studio, webview ini digunakan untuk menampilkan halaman website yang kita panggil dari program android.

ok langsung saja buka android studionya dan buat project baru (pilih yang empty activity).

setelah membuat project tambahkan permission di AndroidManifest

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

Kemudian tambahkan webview di activity_main.xml, berikut design layout activity_main.xml :

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

<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/swipe_refresh"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <WebView

        android:id="@+id/web_view"

        android:layout_width="match_parent"

        android:layout_height="match_parent" />

</android.support.v4.widget.SwipeRefreshLayout>

MainActivty.Java

import android.content.DialogInterface;

import android.content.Intent;

import android.graphics.Bitmap;

import android.net.Uri;

import android.net.http.SslError;

import android.support.v4.widget.SwipeRefreshLayout;

import android.support.v7.app.AlertDialog;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.View;

import android.webkit.SslErrorHandler;

import android.webkit.WebChromeClient;

import android.webkit.WebResourceError;

import android.webkit.WebResourceRequest;

import android.webkit.WebSettings;

import android.webkit.WebView;

import android.webkit.WebViewClient;

import android.widget.Toast;

import java.security.NoSuchProviderException;

public class MainActivity extends AppCompatActivity  implements SwipeRefreshLayout.OnRefreshListener {

    SwipeRefreshLayout swipeRefreshLayout;

    WebView webView;

    WebSettings webSettings;

    String URL = "https://husnulmshare.blogspot.com/";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        try{

            swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh);

            webView = (WebView) findViewById(R.id.web_view);

            swipeRefreshLayout.setOnRefreshListener(this);

            webSettings = webView.getSettings();

            webSettings.setJavaScriptEnabled(true); // Untuk mengaktifkan javascript

            webSettings.getUseWideViewPort();

            webView.setWebChromeClient(new WebChromeClient() {

                @Override

                public void onProgressChanged(WebView view, int newProgress) {

                    // Menampilkan loading ketika webview proses load halaman

                    swipeRefreshLayout.setRefreshing(false);

                }

            });

            webView.setWebViewClient(new WebViewClient(){

                // Ketika webview error atau selesai load page loading akan dismiss

                @Override

                public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {

                    swipeRefreshLayout.setRefreshing(false);

                }

                @Override

                public void onPageFinished(WebView view, String url) {

                    swipeRefreshLayout.setRefreshing(false);

                }

            });

            webView.setWebViewClient(new SSLTolerentWebViewClient());

            webView.loadUrl(URL);

        }catch (Exception e){

            Toast.makeText(this, "Error "+e.getMessage().toString(), Toast.LENGTH_SHORT).show();

        }

    }

    @Override

    public void onRefresh() {

        // Untuk refresh webview dengan swipe

        webView.reload();

    }

    @Override

    public void onBackPressed() {

        // Jika Webview bisa di back maka backward page sebelumnya

        if (webView.canGoBack()) {

            webView.goBack();

        } else {

            finish();

            System.exit(0);

        }

    }

    private class SSLTolerentWebViewClient extends WebViewClient {

        public void onReceivedSslError(WebView view, final SslErrorHandler handler, SslError error) {

            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);

            AlertDialog alertDialog = builder.create();

            String message = "SSL Certificate error.";

            switch (error.getPrimaryError()) {

                case SslError.SSL_UNTRUSTED:

                    message = "The certificate authority is not trusted.";

                    break;

                case SslError.SSL_EXPIRED:

                    message = "The certificate has expired.";

                    break;

                case SslError.SSL_IDMISMATCH:

                    message = "The certificate Hostname mismatch.";

                    break;

                case SslError.SSL_NOTYETVALID:

                    message = "The certificate is not yet valid.";

                    break;

            }

            message += " Do you want to continue anyway?";

            alertDialog.setTitle("SSL Certificate Error");

            alertDialog.setMessage(message);

            alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {

                @Override

                public void onClick(DialogInterface dialog, int which) {

                    // Ignore SSL certificate errors

                    handler.proceed();

                }

            });

            alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {

                @Override

                public void onClick(DialogInterface dialog, int which) {

                   handler.cancel();

               }

            });

            alertDialog.show();

        }

    }

}

Jika sudah jalankan programnya, :D

Happy sharing, Happy Coding

Semoga bermanfaat :D