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Show Loader To Open Url In WebView - Android Example

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WebView is a View that displays web pages.If want to display html as the part of your UI then you can use WebView in your APP.

 

In ths example : :

   1. Opening url in webview.
   2. Showing loader before page load.
   3. Click opened url any link and again open page in webview.

 

 

File : src/ShowWebView.java

 


package com.androidexample.webview;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class ShowWebView extends Activity {

	//private Button button;
	private WebView webView;
	public void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		setContentView(R.layout.show_web_view);
        
		//Get webview 
		webView = (WebView) findViewById(R.id.webView1);
		
		startWebView("http://www.androidexample.com/media/webview/login.html");
		
	}
	
	private void startWebView(String url) {
	    
		//Create new webview Client to show progress dialog
		//When opening a url or click on link
		
		webView.setWebViewClient(new WebViewClient() {      
	        ProgressDialog progressDialog;
	     
	        //If you will not use this method url links are opeen in new brower not in webview
	        public boolean shouldOverrideUrlLoading(WebView view, String url) {              
	            view.loadUrl(url);
	            return true;
	        }
	   
	        //Show loader on url load
	        public void onLoadResource (WebView view, String url) {
	            if (progressDialog == null) {
	                // in standard case YourActivity.this
	                progressDialog = new ProgressDialog(ShowWebView.this);
	                progressDialog.setMessage("Loading...");
	                progressDialog.show();
	            }
	        }
	        public void onPageFinished(WebView view, String url) {
	            try{
	            if (progressDialog.isShowing()) {
	                progressDialog.dismiss();
	                progressDialog = null;
	            }
	            }catch(Exception exception){
	                exception.printStackTrace();
	            }
	        }
	        
	    }); 
	     
	     // Javascript inabled on webview  
	    webView.getSettings().setJavaScriptEnabled(true); 
	    
	    // Other webview options
	    /*
	    webView.getSettings().setLoadWithOverviewMode(true);
	    webView.getSettings().setUseWideViewPort(true);
	    webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
	    webView.setScrollbarFadingEnabled(false);
	    webView.getSettings().setBuiltInZoomControls(true);
	    */
	    
	    /*
	     String summary = "<html><body>You scored <b>192</b> points.</body></html>";
         webview.loadData(summary, "text/html", null); 
	     */
	    
	    //Load url in webview
	    webView.loadUrl(url);
	     
	     
	}
	
	// Open previous opened link from history on webview when back button pressed
	
	@Override
    // Detect when the back button is pressed
    public void onBackPressed() {
        if(webView.canGoBack()) {
            webView.goBack();
        } else {
            // Let the system handle the back button
            super.onBackPressed();
        }
    }

}


 

File : show_web_view.xml

 

Define WebView in xml file.

 


<?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" >
      
   <WebView  
    android:id="@+id/webView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
/>       
</LinearLayout>

 

File : AndroidMainifest.xml

 

Use permission android.permission.INTERNET.

 


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.androidexample.webview"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="17" />

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        
        <activity
            android:label="@string/app_name"
            android:name=".ShowWebView" 
            android:theme="@android:style/Theme.NoTitleBar">
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 

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