Simpe Android WebView - MainActivity.java

MainActivity.java

package com.webview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;


public class MainActivity extends AppCompatActivity {

    //Define URL
    private static final String URL = "http://updatesepati.blogspot.com/";
    //Define WebView
    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        webView = (WebView)findViewById(R.id.webView); //get webView
        webView.setWebViewClient(new WebViewClient()); //set webView client
        WebSettings webSettings = webView.getSettings();// initiate webView settings
        webSettings.setJavaScriptEnabled(true); //allow webView perform javascript
        webSettings.setBuiltInZoomControls(true); //show zoom control
        webView.loadUrl(URL); //load URL
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_exit) {
            //close app when click Close setting menu
            finishApp();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * Handle Back Navigation Button
     * @param keyCode
     * @param event
     * @return
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

        if(keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) {
            //back to previous url
            webView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    /**
     * Method to close App
     */
    private void finishApp() {
        finish();
        moveTaskToBack(true);
    }
}