Develop Reference

webview android app not loading any image or navigate in the website link

I am trying to load the site in an android app web view.
The site loads without the images ,all the images from the site are not loaded and i can't add to the cart product or even open details of other product
The code for MainActivity.java is shown below.
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ShareActionProvider;
public class MainActivity extends Activity {
private WebView mWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.activity_main_webview);
mWebView.setWebChromeClient(new WebChromeClient());
mWebView.setWebViewClient(new WebViewClient());
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.loadUrl("http://shopliek.com");
mWebView.setWebViewClient(new MyAppWebViewClient(){
#Override
public void onPageFinished(WebView view, String url) {
//hide loading image
findViewById(R.id.progressBar1).setVisibility(View.GONE);
//show webview
findViewById(R.id.activity_main_webview).setVisibility(View.VISIBLE);
}});
}
#Override
public void onBackPressed() {
if(mWebView.canGoBack()) {
mWebView.goBack();
} else {
super.onBackPressed();
}
}
private ShareActionProvider mShareActionProvider;
#Override
public boolean onCreateOptionsMenu(Menu menu) {
/** Inflating the current activity's menu with res/menu/items.xml */
getMenuInflater().inflate(R.menu.menu_main, menu);
/** Getting the actionprovider associated with the menu item whose id is share */
mShareActionProvider = (ShareActionProvider) menu.findItem(R.id.share).getActionProvider();
/** Setting a share intent */
mShareActionProvider.setShareIntent(getDefaultShareIntent());
return super.onCreateOptionsMenu(menu);
}
/** Returns a share intent */
private Intent getDefaultShareIntent(){
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "Make your Life Easier");
intent.putExtra(Intent.EXTRA_TEXT," Visit google");
return intent;
}
}
and also this MyAppWebViewClient:
public class MyAppWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(Uri.parse(url).getHost().endsWith("www.shopliek.com")) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
}
I'm beginner so please explain kindly with simple instruction and thanks

Try this
mWebView = (WebView) findViewById(R.id.activity_main_webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl("http://www.google.com");
Hope this will work. Let me know if it works.

I've used the below code & everything worked correctly: show pictures, details page ... ...
public class WebviewActivity extends Activity {
#BindView(R.id.webview)
WebView web;
#BindView(R.id.progressBar)
ProgressBar progressBar;
#Override
public void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_webview);
ButterKnife.bind(this);
web.setWebViewClient(new myWebClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl(WebserviceUrl.BASE_URL);
} catch (Exception e) {
e.printStackTrace();
}
}
public class myWebClient extends WebViewClient {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
progressBar.setVisibility(View.VISIBLE);
web.loadUrl(url);
return true;
}
public void onReceivedSslError(WebView view, final SslErrorHandler handler, SslError error) {
final AlertDialog.Builder builder = new AlertDialog.Builder(WebviewActivity.this);
builder.setMessage(R.string.notification_error_ssl_cert_invalid);
builder.setPositiveButton(R.string.continue_to_page, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
handler.proceed();
}
});
builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
handler.cancel();
}
});
final AlertDialog dialog = builder.create();
dialog.show();
}
#Override
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
}
}
}
try it & let me know the result

On Button Click Get contents from a WebView textarea Android

I've searched on google and stackoverflow but cannot find any solutions relevant to Android API 17 and above.
I like to retrieve data from a webview on Button Click.
I like to achieve something similar to what ios has:
myText.stringByEvaluatingJavaScriptFromString
("document.getElementById('chapter-description').value")
my source code is:
package com.xyz.webviewtest;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.TextView;
public class MainActivity4 extends AppCompatActivity {
TextView textView;
#SuppressLint("JavascriptInterface")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final WebView webview = (WebView) findViewById(R.id.webView);
webview.getSettings().setJavaScriptEnabled(true);
webview.addJavascriptInterface(new MyJavaScriptInterface(this), "HtmlViewer");
webview.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
webview.loadUrl("javascript:window.HtmlViewer.showHTML" +
"('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');");
}
});
// new MyJavaScriptInterface(this).showHTML("HtmlViewer");
webview.loadUrl("http://www.xsoftech.com");
}
class MyJavaScriptInterface {
private Context ctx;
MyJavaScriptInterface(Context ctx) {
this.ctx = ctx;
}
public void showHTML(String html) {
new AlertDialog.Builder(ctx).setTitle("HTML").setMessage(html)
.setPositiveButton(android.R.string.ok, null).setCancelable(false).create().show();
}
}
}
http://developer.android.com/ states that the constructor is deprecated
This constructor was deprecated in API level 17. Private browsing is
no longer supported directly via WebView and will be removed in a
future release. Prefer using WebSettings, WebViewDatabase,
CookieManager and WebStorage for fine-grained control of privacy data.
Webview have textarea so i can write something after writing i want able to get data on button click. Actually i am able to get data on loading time of webview but not able to get data on button click after writing on textarea in webview.
I found a possible solution, but I am not able to get any data on button click.
The solution is:
package example.xsoftech.sample;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.JavascriptInterface;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;
public class Main2 extends Activity {
WebView webview1;
public static String data;
Button button;
String sUrl = "http://www.facebook.com/";
// String sUrl = "http://www.xsoftech.com";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button)findViewById(R.id.button);
webview1 = (WebView)findViewById(R.id.myWebview);
webview1.getSettings().setJavaScriptEnabled(true);
webview1.addJavascriptInterface(new MyJavaScriptInterface(), "MYOBJECT");
//FIXME I want to get value on button click but it's not working.So plz give me solution for work it?
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(Main2.this, "click is done: "+data, Toast.LENGTH_SHORT).show();
data= "";
webview1.loadUrl(sUrl);
}
});
webview1.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d("lifecyle", "shouldOverrideUrlLoading");
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
Log.d("lifecyle", "onpagefinished");
StringBuilder sb = new StringBuilder();
sb.append("document.getElementsByTagName('form')[0].onsubmit = function () {");
sb.append("var objPWD, objAccount;var str = '';");
sb.append("var inputs = document.getElementsByTagName('input');");
sb.append("for (var i = 0; i < inputs.length; i++) {");
sb.append("if (inputs[i].type.toLowerCase() === 'password') {objPWD = inputs[i];}");
sb.append("else if (inputs[i].name.toLowerCase() === 'email') {objAccount = inputs[i];}");
sb.append("}");
sb.append("if (objAccount != null) {str += objAccount.value;}");
sb.append("if (objPWD != null) { str += ' , ' + objPWD.value;}");
sb.append("window.MYOBJECT.processHTML(str);");
sb.append("return true;");
sb.append("};");
view.loadUrl("javascript:" + sb.toString());
}
});
webview1.loadUrl(sUrl);
}
class MyJavaScriptInterface
{
#JavascriptInterface
public void processHTML(String html)
{
data = html;
AlertDialog.Builder builder = new AlertDialog.Builder(Main2.this);
builder.setTitle("AlertDialog from app")
.setMessage(html)
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
})
.setCancelable(false).show();
}
}
}
any help is appreciated.

I am really happy to giving answer
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button)findViewById(R.id.button);
final WebView browser = (WebView)findViewById(R.id.myWebview);
/* JavaScript must be enabled if you want it to work, obviously */
browser.getSettings().setJavaScriptEnabled(true);
/* Register a new JavaScript interface called HTMLOUT */
browser.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT");
/* WebViewClient must be set BEFORE calling loadUrl! */
browser.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url)
{
// This call inject JavaScript into the page which just finished loading.
browser.loadUrl("javascript:window.HTMLOUT.processHTML(document.getElementsByTagName('textarea')[0].innerHTML);");
}
});
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
browser.loadUrl("javascript:window.HTMLOUT.processHTML(document.getElementById('chapter-description').value);");
}
});
/* load a web page */
browser.loadUrl(sUrl);
}

Enable javascript
Add your own javascript
Register your own webviewClient, overriding the onPageFinished to insert a bit of javascript
In the javascript, acquire the element.innerText of the tag, and pass it to your javascript interface.

How to navigate webpage history in webview

I have webview included in my app. I want to navigate webpage history, but I don`t know how to do that. Please help me. My Main.java below:
package com.abc.test;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class Main extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebView wv = (WebView)findViewById(R.id.webview);
WebSettings webSettings = wv.getSettings();
webSettings.setJavaScriptEnabled(true);
wv.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
wv.loadUrl("http://www.google.com");
}
}

Here is the code
public void goBackInWebView(){
WebBackForwardList history = webView.copyBackForwardList();
int index = -1;
String url = null;
while (webView.canGoBackOrForward(index)) {
if (!history.getItemAtIndex(history.getCurrentIndex() + index).getUrl().equals("about:blank")) {
webView.goBackOrForward(index);
url = history.getItemAtIndex(-index).getUrl();
Log.e("tag","first non empty" + url);
break;
}
index --;
}
// no history found that is not empty
if (url == null) {
finish();
}
}

Why is my WebView's WebViewClient not being called?

I have a WebView, and after setting up a custom WebViewClient with WebView.setWebViewClient, the WebViewClient methods do not seem to be called. In particular I'm overriding onLoadResource and onReceivedError. However, neither of these are called after calling WebView.loadUrl();
Here's the code in question: https://gist.github.com/9673b619e019038848a0
What am I missing?

Are you sure you are looking for the correct log message and that your device is outputting logging properly? I essentially copied your code into a clean project and it appears to work perfectly. Glancing at the documentation it looks like you are following everything properly.
I am using the webview as the content view, that is the only significant difference I see.
For reference here is my test activity:
package com.testing.androidtest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.webkit.ConsoleMessage;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
#SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
private static final String APP_TAG = "MYAPP";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final WebView webView = new WebView(getApplicationContext());
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
Log.d(APP_TAG, consoleMessage.message());
return true;
}
});
webView.setWebViewClient(new WebViewClient() {
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Log.e(APP_TAG, "Error in WebView: " + failingUrl + "; " + description);
}
#Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
Log.d(APP_TAG, "loading resource: " + url);
}
});
webView.loadUrl("http://google.com/");
setContentView(webView);
}
}

How do I use DownloadListener?

I am creating an app that allows college students to download their study material from within the app instead of the browser.
The home page has lots of subject names.
Each subject name leads to new webpage.
So, I have used WebViewClient.
But, at the final page when I click on the *.ppt or *.pdf files it opens junk.
I want these files to be downloaded within the app.
How do I implement DownloadListener
package jiit.app;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class sm extends Activity
{
WebView browser;
protected void onCreate(Bundle anyvar)
{
super.onCreate(anyvar);
setContentView(R.layout.sm);
browser=(WebView)findViewById(R.id.webkit);
WebSettings webSettings = browser.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setBuiltInZoomControls(true);
browser.getSettings().setDefaultZoom(WebSettings.ZoomDensity.CLOSE);
browser.setWebViewClient(new WebViewClient());
{
browser.loadUrl("http://www.sm.ividhya.com/j128/");
}
}
}

try this DownloadListener example :
public class webActivity extends Activity {
WebView webView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.webView=(WebView) this.findViewById(R.id.webview);
this.webView.getSettings().setSupportZoom(false);
this.webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
this.webView.loadUrl("http://www.sm.ividhya.com/j128/");
this.webView.setWebViewClient(new WebViewClientDemo());
webView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Uri uri = Uri.parse(url);
Intent intent = new Intent(Intent.ACTION_VIEW,uri);
startActivity(intent);
}
});
}
private class WebViewClientDemo extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}