Develop Reference

How to get information when some one change the value in edittext in android Studio

As I have the next button and webview which is attached with the webview. And My website refreshes with the value upgradation, But when someone types the value in the text field app web view doesn't reload. So please help me to reload my webview when the value is changed or typed new value thank you.
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.util.Base64;
import android.view.View;
import android.view.WindowManager;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class phy_btn extends AppCompatActivity {
TextView justme;
EditText data;
Button btn, next;
String half;
String i, nuller;
public static String Extra_name = "1";
WebView webView;
NetworkChangeListener networkChangeListener = new NetworkChangeListener();
#Override
protected void onStart() {
IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(networkChangeListener, filter);
super.onStart();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_btn);
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(R.layout.toolbar_title);
// justme = findViewById(R.id.nit);
query quu = new query(this);
data = findViewById(R.id.enter);
btn=findViewById(R.id.previous);
next= findViewById(R.id.next);
i = "1";
webView =findViewById(R.id.web);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setSupportZoom(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setSupportZoom(true);
webView.setKeepScreenOn(true);
webView.setWebViewClient(new WebViewClient());
webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webView.getSettings().setAppCacheEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("Practical");
getSupportActionBar().setSubtitle("Physical Botany");
enter code here
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
quu.linkker( new query.VolleyCallback(){
#Override
public void linkker(String date, String numer, String answer1, String imag1) {
i = data.getText().toString();
int value = Integer.parseInt(i);
value++;
String nepali = Integer.toString(value);
half = date.split(".app/")[0];
String killer = half+".app/btnphy/"+nepali+".html";
data.setText(nepali);
webView.loadUrl(killer);
}
});
}
});
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
quu.linkker( new query.VolleyCallback(){
#Override
public void linkker(String date, String numer, String answer1, String imag1) {
i = data.getText().toString();
int value = Integer.parseInt(i);
value--;
String nepali = Integer.toString(value);
half = date.split(".app/")[0];
String killer = half+".app/btnphy/"+nepali+".html";
data.setText(nepali);
webView.loadUrl(killer);
if (i != "1") {
webView.loadUrl(killer);
}
}
});
}
});
quu.linkker( new query.VolleyCallback(){
#Override
public void linkker(String date, String numer, String answer1, String imag1) {
half = date.split(".app/")[0];
String killer = half+".app/btnphy/"+i+".html";
// justme.setText(killer);
if (i != "1") {
webView.loadUrl(killer);
}
webView.loadUrl(killer);
}
});
}
}

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.

android webview SAML error

Is there a permission or config that needs to be used if a site uses SAML in an android webview?
I'm getting the error:
opensaml::FatalProfileException at (http://example.com/SAML2/POST)
Error from identity provider: Status:
urn:oasis:names:tc:SAML:2.0:status:Responder Sub-Status
urn:oasis:names:tc:SAML:2.0:status:AuthnFailed
My permissions look like:
My activity code looks like:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Context c = this.getApplicationContext();
setContentView(R.layout.activity_main);
WebView webView = (WebView) findViewById(R.id.webview);
webView.setFocusable(true);
webView.setFocusableInTouchMode(true);
webView.getSettings().setJavaScriptEnabled(true);
//webView.getSettings().setPluginsEnabled(true);
webView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return false;
}
});
webView.loadUrl("http://example.com");
}

If http://example.com is the IDP and your mobile application is starting the SAML authentication. Your mobile phone must provide a SAML AuthenRequest. I cant se that you do this in your code.
It is quite uncommon to do SAML authentication from a mobile phone. Generally Oauth is the better choice here.

I did this based on https://github.com/maybeaustin/WebView-Developer-Browser :
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Build;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import com.webviewbrowser.R;
public class MainActivity extends Activity {
private long pageStartTime = 0;
private WebView wv;
private ImageButton newActivityBtn;
private EditText et;
private TextView pageLoadTime;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
wv = (WebView) findViewById(R.id.wv);
newActivityBtn = (ImageButton) findViewById(R.id.new_activity);
pageLoadTime = (TextView) findViewById(R.id.page_load_time);
et = (EditText) findViewById(R.id.et);
// setup edit text
et.setSelected(false);
if (getIntent().getStringExtra("url") != null) {
et.setText(getIntent().getStringExtra("url"));
} else {
et.setText("");
}
// setup wv
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
WebView.setWebContentsDebuggingEnabled(true);
}
wv.setWebChromeClient(new WebChromeClient());
wv.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
WebSettings settings = wv.getSettings();
settings.setAllowUniversalAccessFromFileURLs(true);
settings.setJavaScriptEnabled(true);
settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
settings.setAppCacheEnabled(false);
settings.setDomStorageEnabled(true);
wv.setWebViewClient(new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
et.setText(url);
pageStartTime = System.currentTimeMillis();
pageLoadTime.setText("0ms");
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if (pageStartTime == 0) {
} else {
long loadTime = (System.currentTimeMillis() - pageStartTime);
pageLoadTime.setText(String.format("%sms", loadTime));
System.out.println(String.format("page load time: %sms", loadTime));
}
}
});
handleLoadUrl();
// setup events
newActivityBtn.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
newActivityBtn.setColorFilter(getResources().getColor(android.R.color.holo_blue_dark));
return false;
} else if (event.getAction() == MotionEvent.ACTION_UP) {
newActivityBtn.setColorFilter(null);
return false;
}
return false;
}
});
newActivityBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity.class);
intent.putExtra("url", et.getText().toString());
startActivity(intent);
}
});
et.setOnKeyListener(new View.OnKeyListener() {
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER) {
handleLoadUrl();
return true;
} else {
return false;
}
}
});
}
private void handleLoadUrl() {
String url = et.getText().toString();
if (url.startsWith("http://")) {
} else if (url.startsWith("https://")) {
} else {
url = String.format("http://%s", url);
}
wv.loadUrl(url);
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(et.getWindowToken(), 0);
}
}

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();
}
}

Shouldoverrideurlloading method in android

I am running into trouble in shouldoverrideurlloading method, wherein the URL being overridden is not being shown. Instead, a blank white screen is coming up, and Logcat shows no errors. I have provided code below . WHere am I making a mistake? Please advise
package com.example.webviewkm;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.View;
import android.webkit.HttpAuthHandler;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.net.http.SslError;
import android.webkit.SslErrorHandler;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = (WebView) findViewById(R.id.MyWebView);
webView.setInitialScale(67);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webView.setVerticalScrollBarEnabled(false);
webView.setHorizontalScrollBarEnabled(false);
webView.setWebViewClient(new WebViewClient() {
#Override
public void onReceivedLoginRequest(WebView view, String realm,
String account, String args) {
System.err.println(realm);
System.err.println(account);
System.out.println(args); }
#Override
public void onReceivedError( WebView view, int errorCode, String description, String failingUrl ) {
Toast.makeText(view.getContext(), "Unknown Error", Toast.LENGTH_LONG).show();
System.err.println(errorCode + " - " + description + "-" + failingUrl);
}
#Override
public void onReceivedSslError( WebView view, SslErrorHandler handler, SslError error ) {
System.err.println("SSL ERROR");
handler.proceed();
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Intent intent = new Intent(MainActivity.this, MainActivity.class);
intent.putExtra("url", url);
startActivity(intent);
return true;
}
#Override
public void onReceivedHttpAuthRequest(WebView view, final HttpAuthHandler handler, final String host,
String realm) {
System.err.println("HTTP auth request");
final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
if (handler.useHttpAuthUsernamePassword()) {
if (preferences.contains("username")) {
handler.proceed(preferences.getString("username", null), preferences.getString("password", null));
return;
}
}
new Dialog(MainActivity.this){
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(host);
setContentView(R.layout.credentials);
final EditText userName = (EditText) findViewById(R.id.UserName);
final EditText password = (EditText) findViewById(R.id.Password);
userName.setText(preferences.getString("username", ""));
password.setText(preferences.getString("password", ""));
Button button = (Button) findViewById(R.id.GoButton);
button.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
String userName2 = userName.getText().toString();
String password2 = password.getText().toString();
Editor edit = preferences.edit();
edit.putString("username", userName2);
edit.putString("password", password2);
edit.commit();
handler.proceed(userName2, password2);
dismiss();
}});
}
}.show();
}
});
String url;
if (getIntent().hasExtra("url")) {
url = getIntent().getStringExtra("url");
} else {
url = "https://kee.mahindrasatyam.com/_layouts/mobile/mobilesearch.aspx";
}
webView.loadUrl(url);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
Intent intent = new Intent(MainActivity.this, MainActivity.class);
startActivity(intent);
return true;
}
}

In your Code pasted below in the method shouldOverrideUrlLoading,
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Intent intent = new Intent(MainActivity.this, MainActivity.class);
intent.putExtra("url", url);
startActivity(intent);
return true;
}
You are just Starting the same Activity and you are passing the url as intent extra ,this will not load the url in webview neither it will give you an error , and if you are intending to load the url in the webview use
webView.loadUrl(url) in shouldOverrideUrlLoading method.