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when we click on link the webview not show any content

when we use this url ("https://premium.mysirg.com/learn/beginners-web-development") in webview the webview not show any content or when we click on link from website the page not loaded by webview and show blank white screen and when we load this url in browser it work fine and show all content but webView not show any content how to solve this problem please help.
webView = view.findViewById(R.id.webView);
webView.loadUrl("https://premium.mysirg.com/learn/beginners-web-development");
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setBuiltInZoomControls(true);
webView.setWebViewClient(new WebViewClient() {
#Override public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
}
#Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}
});
webView.setWebChromeClient(new WebChromeClient(){
});

It is working for me. I will share the source code here for your use.
import android.app.Activity;
import android.os.Bundle;
import android.webkit.DownloadListener;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
WebView webview;
String LoginUrl = "https://premium.mysirg.com/learn/beginners-web-development";
private static String TAG = "WebView";
private static final int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 124;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webview = findViewById(R.id.webview);
webview.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
/*#Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
// super.onReceivedSslError(view, handler, error);
handler.proceed();
}*/
});
webview.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
}
});
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setSupportZoom(false);
webview.getSettings().setAllowFileAccess(true);
webview.getSettings().setAllowUniversalAccessFromFileURLs(true);
webview.getSettings().setUseWideViewPort(false);
webview.getSettings().setLoadWithOverviewMode(false);
webview.setVerticalScrollBarEnabled(false);
webview.setHorizontalScrollBarEnabled(false);
webview.getSettings().setAppCacheEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setSupportMultipleWindows(false);
webview.getSettings().setDomStorageEnabled(true);
// webview.getSettings().setUserAgentString("Mozilla");
// webview.getSettings().setUserAgentString("Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.1");
webview.getSettings().setUserAgentString(WebSettings.getDefaultUserAgent(this));
webview.loadUrl(LoginUrl);
}
#Override
public void onBackPressed() {
// super.onBackPressed();
if(webview.canGoBack())
webview.goBack();
else
finish();
}
}

How can I remove Header and Footer to all web pages when using Android WebView in Java?

I'm using Android Webview to display a web page inside my application, I'm using Java. I'm not a very experienced programmer. My website is made with WordPress. In my Android App I would like to programmatically remove Header and Footer of all pages displayed in my app through the Android Webview.
If I check the ID of the header in my website, the ID is: #meanmenu
So I can remove it with CSS like so:
#meanmenu {
display: none;
}
The Footer does not have an ID or Class but I can remove it with CSS like below:
footer {
display: none;
}
How can I remove both the Header and Footer automatically when the pages load in my Webview?
Below is part of my Java code for the Webview:
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
public class RentalsActivity extends AppCompatActivity {
/** Called when the activity is first created. */
WebView web;
ProgressBar progressBar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rentals);
web = (WebView) findViewById(R.id.webView);
progressBar = (ProgressBar) findViewById(R.id.progressBar1);
web.setWebViewClient(new myWebClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl("https://www.sample.com/pages");
}
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);
}
}

Cannot get webviewer to work

I want users of my app to click on an image, if they do so, a new activity must be loaded. This activity then shows a predetermined webpage. But when adding the webviewer widget, it doesn't work.
Activity name = activity_webbrowser_inno.xml
Actual webviewer widget name = webview_inno (in a constraint layout)
Java name = activity_webbrowser_inno
In the XML file:
<WebView
android:id="#+id/webview_inno"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
In the activity_webbrowser_inno.java file:
package eu.inno.inno
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebView;
public class activity_webbrowser_inno extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_webbrowser_inno);
}
WebView webview_inno = (WebView) findViewById(R.id.webview_inno);
webview_inno.loadUrl("http://www.inno.eu")
ERROR in red on the loadUrl. On hover: cannot resolve symbol 'loadUrl'.
I know there are other threads about this, but following their steps didn't seem to work. Or I couldn't understand them. This is my first project.

private void uiBind() {
webView = (WebView) findViewById(R.id.web_view);
webView.setWebViewClient(new FileWebView());
webView.getSettings().setLoadsImagesAutomatically(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAllowFileAccess(true);
if (mode == Constant.PDF_FILE) {
webView.loadUrl("http://docs.google.com/gview?embedded=true&url="
+ "http://www.5gamericas.org/files/2714/1471/2645/4G_Americas_Recommendations_on_5G_Requirements_and_Solutions_10_14_2014-FINALx.pdf");
} else if (mode == Constant.DOC_FILE) {
webView.loadUrl("http://docs.google.com/gview?embedded=true&url="
+ "http://ijsetr.com/uploads/4256135G%20Mobile%20Wireless%20Technology.docx");
} else if (mode == Constant.EXCEL_FILE) {
webView.loadUrl("http://docs.google.com/gview?embedded=true&url="
+ "http://download.microsoft.com/download/1/4/E/14EDED28-6C58-4055-A65C-23B4DA81C4DE/Financial%20Sample.xlsx");
}
}
public class FileWebView extends WebViewClient {
#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);
}
}

Progress Bar only loads first time. On second page it does not show

Hello i have java code where progressBar Loads just for first time only.
second time when surfing inner pages it does not shows at all.
package ext.packagename.apk;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
WebView web;
ProgressBar progressBar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.activity_main);
OneSignal.startInit(this).init();
web = (WebView) findViewById(R.id.activity_main_webview);
progressBar = (ProgressBar) findViewById(R.id.progressBar1);
//open in webview
//web.setWebViewClient(new myWebClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl("http://example1.com");
// opening in browser instead of WebView
web.setWebViewClient(new MyAppWebViewClient());
}
public class MyAppWebViewClient extends WebViewClient
{
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(Uri.parse(url).getHost().endsWith("exmaple1.com") || Uri.parse(url).getHost().endsWith("example2.com") || Uri.parse(url).getHost().endsWith("example3.com") ) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
#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;
} else {
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setTitle("Alert")
.setMessage("exit?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.setNegativeButton("No", null)
.show();
}
return super.onKeyDown(keyCode, event);
}
}
Progressbar is loading very fine at first time when main page loads. after that it disappear.

Use
progressBar.setVisibility(View.VISIBLE);
in onPageStarted method

Android Application Web View Back Button

I have a web application that works well but I cannot get the back button to function in the web view. Please see code:
package com.example;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.view.KeyEvent;
public class extends Activity
{
final Activity activity = this;
WebView WebView;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
WebView webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setUseWideViewPort(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress)
{
activity.setTitle("Loading...");
activity.setProgress(progress * 100);
if(progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
{
// Handle the error
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url);
return true;
}
});
webView.loadUrl("http://www.example.com");
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (WebView != null && (keyCode == KeyEvent.KEYCODE_BACK) && WebView.canGoBack()) {
WebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
The application runs but when the back button is pressed it still exits the application. I am also wanting to add the ability to use a html mailto tag with the application. Any help would be appreciated. Thank you.

Edit:
Include a null check to see if WebView is null before invoking methods on it.
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (WebView != null && (keyCode == KeyEvent.KEYCODE_BACK) && WebView.canGoBack()) {
WebView.goBack();
return true;
}

Your code seems correct to me. What is the exact behavior you are hoping to achieve from the back button?
What currently happens when you run the application and press the back button?
Edit, Oh I see what is happening.
You are trying to override onKeyDown() inside your onCreate(). onKeyDown() and onCreate() are both methods of Activity, thus you cannot declare one inside the other.
Try your code like this:
package com.example;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.view.KeyEvent;
public class DealJargon extends Activity {
final Activity activity = this;
WebView WebView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
WebView webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setUseWideViewPort(true);
webView.loadUrl("http://www.example.com");
}
WebView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress){
activity.setTitle("Loading...");
activity.setProgress(progress * 100);
if(progress == 100)
activity.setTitle(R.string.app_name);
}
});
WebView.setWebViewClient(new WebViewClient() {
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){
// Handle the error
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url){
view.loadUrl(url);
return true;
}
});
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && WebView.canGoBack()) {
WebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
Edit 2: Anytime you get some kind of compile error that has something to do with a brace it is likely that you are trying to declare a method inside the declaration of another method. Or something similar.