Android – Load WebView with ProgressBar

Description:
Previously, i have published an article for Android – WebViewClient example where we have discussed about how to load URL inside the application instead of opening a native browser.

Now, just consider the case where we want to include progress bar to show loading process. At the same time we can either show ProgressDialog or include ProgressBar inside the XML layout.
– If we include ProgressBar then we have to make it INVISIBLE or GONE whenever page loading is finished
– And if we display ProgressDialog then we have to dismiss it whenever page loading is finished.
So in this tutorial, we are going to display ProgressBar. Just check the snap-2 where ProgressBar is invisible as we have made it invisible.

Output:

Note:
Before implementing this solution, make sure you have added INTERNET permission in your AndroidManifest.xml file.

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

Solution:
WebViewClientDemoActivity.java

package com.paresh.webviewclientdemo;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

/*
 * Demo of creating an application to open any URL inside the application and clicking on any link from that URl
should not open Native browser but  that URL should open in the same screen.

- Load WebView with progress bar
 */
public class WebViewClientDemoActivity extends Activity {
    /** Called when the activity is first created. */

 WebView web;
 ProgressBar progressBar;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        web = (WebView) findViewById(R.id.webview01);
        progressBar = (ProgressBar) findViewById(R.id.progressBar1);

        web.setWebViewClient(new myWebClient());
        web.getSettings().setJavaScriptEnabled(true);
        web.loadUrl("http://www.technotalkative.com");
    }

    public class myWebClient extends WebViewClient
    {
     @Override
     public void onPageStarted(WebView view, String url, Bitmap favicon) {
      // TODO Auto-generated method stub
      super.onPageStarted(view, url, favicon);
     }

     @Override
     public boolean shouldOverrideUrlLoading(WebView view, String url) {
      // TODO Auto-generated method stub

      view.loadUrl(url);
      return true;

     }

     @Override
     public void onPageFinished(WebView view, String url) {
      // TODO Auto-generated method stub
      super.onPageFinished(view, url);

      progressBar.setVisibility(View.GONE);
     }
    }

    // To handle "Back" key press event for WebView to go back to previous screen.
 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event)
 {
  if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {
   web.goBack();
   return true;
  }
  return super.onKeyDown(keyCode, event);
 }
}

main.xml

<!--?xml version="1.0" encoding="utf-8"?-->
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical">

   <textview android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="This is the demo of WebView Client" android:textsize="20sp" android:gravity="center_horizontal">
   </textview>

    <progressbar android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_gravity="center" android:id="@+id/progressBar1">   

   <webview android:id="@+id/webview01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_weight="1">
   </webview>
</progressbar></linearlayout>

Download Full source code from here: Android – Load WebView with ProgressBar.

Feedback and reviews are always welcome. Please

Reference: Android – Load WebView with ProgressBar from our JCG partner Paresh N. Mayani at the TechnoTalkative blog.