I have app's MainActivity like this, and this app can't download file with webview
Anybody knows how to fix the download problem?
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Android.Webkit;
namespace REC
{
[Activity(Label = "APPNAME", MainLauncher = true, Icon = "#drawable/rec512", ConfigurationChanges = Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
public class MainActivity : Activity
{
private WebView mWebView;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
RequestWindowFeature(WindowFeatures.NoTitle);
SetContentView(Resource.Layout.Main);
mWebView = FindViewById<WebView>(Resource.Id.webview);
mWebView.Settings.SetRenderPriority(WebSettings.RenderPriority.High);
mWebView.Settings.JavaScriptEnabled = true;
mWebView.LoadUrl("http://www.APPname.com");
mWebView.SetWebViewClient(new WebViewClient());
// mWebView.SetDownloadListener(new MyDownloadListener()
}
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest request = (WebRequest)base.GetWebRequest(address);
// Perform any customizations on the request.
// This version of WebClient always preauthenticates.
request.PreAuthenticate = true;
return request;
}
class MonkeyWebChromeClient : WebChromeClient
{
public override bool OnJsAlert(WebView view, string url, string message, JsResult result)
{
return base.OnJsAlert(view, url, message, result);
}
public override Boolean OnJsConfirm(WebView view, String url, String message, JsResult result)
{
return base.OnJsConfirm(view, url, message, result);
}
public override Boolean OnJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result)
{
return base.OnJsPrompt(view, url, message, defaultValue, result);
}
}
public override bool OnKeyDown(Keycode keyCode, KeyEvent e)
{
if (keyCode == Keycode.Back && mWebView.CanGoBack())
{
mWebView.GoBack();
return true;
}
return base.OnKeyDown(keyCode, e);
}
}
public class WebClient : WebViewClient
{
public override bool ShouldOverrideUrlLoading(WebView view, string url)
{
//return base.ShouldOverrideUrlLoading(view, url);
view.LoadUrl(url);
return true;
}
internal object GetWebRequest(Uri address)
{
throw new NotImplementedException();
}
}
}
You did not implement webview download listener,please refer to the following code :
public class MainActivity : Activity
{
WebView wv1;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView (Resource.Layout.Main);
wv1 = FindViewById<WebView>(Resource.Id.webView1);
wv1.SetDownloadListener(new MyDownloadListerner(this));
wv1.LoadUrl("https://notepad-plus-plus.org/download/v7.3.2.html");
}
class MyDownloadListerner : Java.Lang.Object, IDownloadListener
{
Context cont;
public MyDownloadListerner(Context context)
{
cont = context;
}
public void OnDownloadStart(string url, string userAgent, string contentDisposition, string mimetype, long contentLength)
{
Android.Net.Uri uri = Android.Net.Uri.Parse(url);
Intent intent = new Intent(Intent.ActionView,uri);
cont.StartActivity(intent);
}
}
}
Note: This method is start another browser to download, you can also create a new thread to download file at the OnDownloadStart function.
screen shot:
Please follow the following code
public class WebViewFragment extends KaROFragment {
private WebView mWebView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_webview, container, false);
try {
mWebView = (WebView) view.findViewById(R.id.webView);
mWebView.setWebViewClient(new myWebClient());
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setUseWideViewPort(true);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.getSettings().setPluginState(WebSettings.PluginState.ON);
mWebView.getSettings().setSupportZoom(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.loadUrl("https://www.google.com/");
} catch (Exception e) {
e.getStackTrace();
}
return view;
}
public class myWebClient 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);
}
}
public void downloadAndPrintDocument(WebView webView, String title) {
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
PrintManager printManager = (PrintManager) mContext.getSystemService(Context.PRINT_SERVICE);
//noinspection deprecation
PrintDocumentAdapter printDocumentAdapter = webView.createPrintDocumentAdapter();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
printDocumentAdapter = webView.createPrintDocumentAdapter(title);
String documentName = title;
PrintJob printJob = printManager.print(documentName, printDocumentAdapter, new PrintAttributes.Builder().build());
List<PrintJob> printJobs = printManager.getPrintJobs();
printJobs.add(printJob);
} else {
// mContext.showToast(mContext.getString(R.string.mytools_printing_not_supported), 1);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Related
When I try with the phone browser it opens the app. but not inside of the app webview.
public class WebViewPayNowFragment extends Fragment implements AdvancedWebView.Listener {
private View rootView;
private AdvancedWebView mWebView;
private String link, tid;
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
System.out.println("asdajsda : "+url);
if (url != null && url.startsWith("ptcl://")) {
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
return true;
} else {
return false;
}
}
}
public WebViewPayNowFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle = this.getArguments();
if (bundle != null) {
link = bundle.getString(Constants.LINK, null);
tid = bundle.getString(Constants.TRANSACTION_ID, null);
System.out.println("asdiahsdhakjshdkah : " + link);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_web_view, container, false);
mWebView = rootView.findViewById(R.id.webview);
mWebView.setListener(getActivity(), this);
mWebView.setWebViewClient(new MyBrowser());
if (link != null) {
String postData = null;
try {
postData = "TransactionID=" + URLEncoder.encode(tid, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
mWebView.postUrl(link, postData.getBytes());
} else {
}
return rootView;
}
Here is my code inside the fragment.
I created a inner class extending WebViewClient. and set the setWebViewClient but im still having the problem.
Solution:
I encountered this situation myself. This is what I did:
First create a inner class and extend it with WebViewClient:
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
....
}
}
then:
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url != null && url.startsWith("ptcl://")) {
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
return true;
} else {
return false;
}
}
Lastly,
webView.setWebViewClient(new MyBrowser());
Try it, Hope it helps.
When I make a video full screen in WebView, the toolbar is not hidden. How can I hide it? Below you can see the codes I use.I'm using fragment and the navigation drawer menu.
When I make a video full screen in WebView, the toolbar is not hidden. How can I hide it? Below you can see the codes I use.I'm using fragment and the navigation drawer menu.
Full screen
public class searchWebFragment extends Fragment {
public searchWebFragment() {
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.searchwb, container, false);
final ProgressBar progressBar = (ProgressBar) v.findViewById(R.id.progressBarHome);
final WebView webView = (WebView) v.findViewById(R.id.wv_home);
final EditText araTxt = (EditText)v.findViewById(R.id.araTxt);
final Button araBtn = (Button)v.findViewById(R.id.araBtn);
final TextView uyariTxt = (TextView)v.findViewById(R.id.uyariTxt);
progressBar.setVisibility(View.INVISIBLE);
webView.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView webView, int i, String s, String d1) {
webView.loadUrl("file:///android_asset/error.html");
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.INVISIBLE);
}
});
webView.getSettings().setBuiltInZoomControls(true);
webView.setDownloadListener(new DownloadListener() {
#Override
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(
Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); //Notify client once download is completed!
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, url);
DownloadManager dm = (DownloadManager) getActivity().getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getActivity().getApplicationContext(), "Dosya İndiriliyor", //To notify the Client that the file is being downloaded
Toast.LENGTH_LONG).show();
}
});
webView.setVisibility(View.INVISIBLE);
araBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
webView.setVisibility(View.VISIBLE);
String aranacaksey = araTxt.getText().toString();
webView.getSettings().setDisplayZoomControls(false);
webView.getSettings().setAppCacheEnabled(false);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
String url = "http://www.ifsalar.16mb.com/?s=" + aranacaksey;
webView.loadUrl(url);
araTxt.setVisibility(View.INVISIBLE);
araBtn.setVisibility(View.INVISIBLE);
uyariTxt.setVisibility(View.INVISIBLE);
}
});
webView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
webView.setOnKeyListener(new View.OnKeyListener() {
#Override
public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (webView.canGoBack()) {
webView.goBack();
}
return true;
}
return false;
}
});
return v;
}
}
I would recommend you to try out the follow code and remove the listeners which are related to loading the contents of your WebView.
You need to implement the method to load the website in your webview first.
private void loadWebsite() {
ConnectivityManager connectivityManager = (ConnectivityManager) getApplication().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager .getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnectedOrConnecting()) {
mWebView.loadUrl("yourURL");
} else {
mWebView.setVisibility(View.GONE);
}
}
From here, you need to implement 2 different class "Browser_Home" and "MyChrome". For testing purposes, just write it outside searchWebFragment and later on you can implement it as a separate java file. With only the Browser_Home class, the fullscreen button will be disabled. When MyChrome class is added, fullscreen button is enabled and toolbar should disappear as intended.
class Browser_home extends WebViewClient {
Browser_home() {
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public void onPageFinished(WebView view, String url) {
setTitle(view.getTitle());
progressBar.setVisibility(View.GONE);
super.onPageFinished(view, url);
}
}
private class MyChrome extends WebChromeClient {
private View mCustomView;
private WebChromeClient.CustomViewCallback mCustomViewCallback;
protected FrameLayout mFullscreenContainer;
private int mOriginalOrientation;
private int mOriginalSystemUiVisibility;
MyChrome() {}
public Bitmap getDefaultVideoPoster()
{
if (mCustomView == null) {
return null;
}
return BitmapFactory.decodeResource(getApplicationContext().getResources(), 2130837573);
}
public void onHideCustomView()
{
((FrameLayout)getWindow().getDecorView()).removeView(this.mCustomView);
this.mCustomView = null;
getWindow().getDecorView().setSystemUiVisibility(this.mOriginalSystemUiVisibility);
setRequestedOrientation(this.mOriginalOrientation);
this.mCustomViewCallback.onCustomViewHidden();
this.mCustomViewCallback = null;
}
public void onShowCustomView(View paramView, WebChromeClient.CustomViewCallback paramCustomViewCallback)
{
if (this.mCustomView != null)
{
onHideCustomView();
return;
}
this.mCustomView = paramView;
this.mOriginalSystemUiVisibility = getWindow().getDecorView().getSystemUiVisibility();
this.mOriginalOrientation = getRequestedOrientation();
this.mCustomViewCallback = paramCustomViewCallback;
((FrameLayout)getWindow().getDecorView()).addView(this.mCustomView, new FrameLayout.LayoutParams(-1, -1));
getWindow().getDecorView().setSystemUiVisibility(3846);
}
}
And finally, apply the following functions and attributes to your webview and give it another try. Remember to apply these within your OnCreate method:
mWebView.setWebViewClient(new Browser_home());
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAllowFileAccess(true);
webSettings.setAppCacheEnabled(true);
loadWebsite();
Let me know if this works and I can credit the corresponding person for the assistance with the code and classes.
create a folder row and copy the video on raw folder on resources and do the following steps,
On your XML file add VideoView,
<VideoView
android:id="#+id/vdoPlayer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"/>
On your .java class file do,
Uri uri = Uri.parse("android.resource://Your package name Here/" + R.raw.welcome_video);
vdoPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.setLooping(true);
}
});
vdoPlayer.setVideoURI(uri);
vdoPlayer.start();
I am loading some urls in my app using android WebView and all successful. But when i am trying to load this url:
http://dev.infibond.com/cloud/instagram?user_profile=https%3A%2F%2Fscontent.cdninstagram.com%2Ft51.2885-19%2Fs150x150%2F13534190_829691380497090_1099495058_a.jpg&user_name=infibondtest
But for some reason i am failing - "view.loadUrl(url);" in "shouldOverrideUrlLoading" doesn't show the page and doesn't load another url. just shows a white page.
The response code from the server is 304.
Before i am getting to this url, i am doing authentication with Instagram and sending the access token as a cookie.
public class CloudWebViewActivity extends ActivityBase {
public static final String TAG = "WebViewActivity";
private static final String WEB_VIEW_TOKEN = "token";
private static final String WEB_VIEW_TITLE = "title";
private static final String WEB_VIEW_URL = "url";
private ProgressBar mPbProgress;
private Toolbar mToolbar;
private String mTitle, mUrl;
public static void setInstance(Context context, String title, String url) {
Intent starter = new Intent(context, CloudWebViewActivity.class);
starter.putExtra(WEB_VIEW_TITLE, title);
starter.putExtra(WEB_VIEW_URL, url);
context.startActivity(starter);
}
// MARK: Lifecycle
protected void onCreate(Bundle savedInstanceState) {
mTitle = getIntent().getStringExtra(WEB_VIEW_TITLE);
mUrl = getIntent().getStringExtra(WEB_VIEW_URL);
super.onCreate(savedInstanceState);
AppInstance.sharedInstance().getBus().register(this);
}
#Override
protected void onResume() {
super.onResume();
AppInstance.sharedInstance().setSelf();
mToolbar.setTitle(mTitle);
mPbProgress.setVisibility(View.VISIBLE);
}
#Override
protected void onDestroy() {
super.onDestroy();
AppInstance.sharedInstance().getBus().unregister(this);
}
#SuppressLint("SetJavaScriptEnabled")
public void findViews() {
setContentView(R.layout.webview_activity);
mPbProgress = (ProgressBar) findViewById(R.id.pBProgress);
final WebView mWebView = (WebView) findViewById(R.id.webView);
if (mWebView != null) {
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setUseWideViewPort(true);
mWebView.setWebViewClient(webViewClient);
// Register a new JavaScript interface called HTMLOUT
mWebView.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT");
}
if (JavaUtils.isNotNullNotEmptyNotWhiteSpaceOnly(mUrl) && mWebView != null) {
String cookieString = WEB_VIEW_TOKEN + "=" + NetworkManager.instance().getToken();
CookieManager.getInstance().setCookie(mUrl, cookieString);
mWebView.loadUrl(mUrl);
} else {
InfiLogger.getInstance().logRemoteException(new RuntimeException("Cloud service: " + mTitle + " came with an empty/null url address"));
AndroidUtils.showToast(R.string.error_cant_load_url);
}
}
#Override
public Toolbar setToolbar() {
mToolbar = (Toolbar) findViewById(R.id.mToolbar);
if (mToolbar != null) {
mToolbar.setVisibility(View.VISIBLE);
}
return mToolbar;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
break;
}
return super.onOptionsItemSelected(item);
}
private void handleProgressBarVisibility(String url) {
if (url.contains("login") ||
url.contains("https://api.twitter.com/oauth/authorize?oauth_token=") ||
url.contains("https://vimeo.com/log_in") ||
url.contains(".jpg")) {
mPbProgress.setVisibility(View.GONE);
} else {
mPbProgress.setVisibility(View.VISIBLE);
}
}
private final WebViewClient webViewClient = new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
handleProgressBarVisibility(url);
String cookieString = WEB_VIEW_TOKEN + "=" + NetworkManager.instance().getToken();
CookieManager.getInstance().setCookie(mUrl, cookieString);
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, final String url) {
if (url.startsWith("http://dev.infibond.com/api/cloud/")) {
mPbProgress.setVisibility(View.GONE);
// This call inject JavaScript into the page which just finished loading.
view.loadUrl("javascript:window.HTMLOUT.processHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');");
}
}
#Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
AndroidUtils.showToast(error.getDescription());
} else {
AndroidUtils.showToast(R.string.gen_Something_went_wrong);
}
mPbProgress.setVisibility(View.INVISIBLE);
}
};
// An instance of this class will be registered as a JavaScript interface
class MyJavaScriptInterface {
#JavascriptInterface
#SuppressWarnings("unused")
public void processHTML(String html) {
// process the html as needed by the app
InfiLogger.d("infi", "html: " + html);
if (html.contains("code")) {
final boolean success;
if (html.contains("\"code\":200")) {
AndroidUtils.showToast(AndroidUtils.getString(R.string.cloud_sync_start) + mTitle);
success = true;
} else {
AndroidUtils.showToast(AndroidUtils.getString(R.string.gen_Something_went_wrong));
success = false;
}
AppInstance.sharedInstance().getBus().post(new CloudConnectionStateChangedBusEvent(mTitle, success));
finish();
}
}
}
}
I am not 100% sure, but it seems like you have a lot of small errors. I think the one in question is here:
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
handleProgressBarVisibility(url);
String cookieString = WEB_VIEW_TOKEN + "=" +
NetworkManager.instance().getToken();
CookieManager.getInstance().setCookie(mUrl, cookieString);
view.loadUrl(url);
return true;
}
The view.loadUrl(url) seems very wrong to me. I think you may need to change this to something like:
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("dev.infibond.com")) {
return false;
}
// otherwise, they are leaving the site, so open a new
// browser instead
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
And remove the guts of what you did here. Most of it is findViews() and should not be repeated anyway. I'm guessing this is what you meant to do with
handleProgressBarVisibility(url) in the WebViewClient but I'm not really sure:
#Override
public void onLoadResource(WebView view, String url) {
handleProgressBarVisibility(url);
}
To create a webView recently I was using webViewClient. mWebView.setWebViewClient(new WebViewClient());
But I need to implement a progress bar. When user clicks a link, this progress bar will be visible. After page complete, progressbar will be hidden and webView will be visible. Regarding to this and this, So I added a WebChromeClient. But it loads first URL, but when I click a button inside my web page, a dialog opens and asks to open URL with which application.
I read that I should override shouldOverrideUrlLoading() method. but I get an error that "shouldOverrideUrlLoading" can't be overriden for WebChromeClient.
I would be happy if you can give an example that has progressbar and webView, also opens new URLs inside the same webView.
public class WebActivity extends Activity {
WebView mWebView;
ProgressBar mProgress;
Context mContext;
ProgressBar mProgressBar;
#Override
public void onCreate(Bundle savedInstanceState) {
this.mContext = getApplicationContext();
super.onCreate(savedInstanceState);
setContentView(R.layout.web);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.setWebChromeClient(new myWebChromeClient());
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setUserAgentString("myApp");
mProgressBar = (ProgressBar) findViewById(R.id.webProgressBar);
mProgressBar.setMax(100);
}
public class myWebChromeClient extends WebChromeClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return false;
}
#Override
public void onProgressChanged(WebView view, int newProgress) {
//WebActivity.this.setValue(newProgress);
super.onProgressChanged(view, newProgress);
}
}
}
try with this code
webView = (WebView) view.findViewById(R.id.transcationwebview);
progressdialog = ProgressDialog.show(mContext, "",
mContext.getString(R.string.please_wait));
progressdialog.setCancelable(true);
progressdialog.setOnCancelListener(new OnCancelListener() {
#Override
public void onCancel(DialogInterface dialog) {
webView.stopLoading();
// webView.clearView();
}
});
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new MyChromeClient());
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// TODO Auto-generated method stub
view.loadUrl(url);
return super.shouldOverrideUrlLoading(view, url);
}
#Override
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
if (progressdialog != null && progressdialog.isShowing()) {
progressdialog.dismiss();
} else {
}
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
#Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// TODO Auto-generated method stub
super.onReceivedError(view, errorCode, description, failingUrl);
}
});
webView.loadUrl("url");
webView.getSettings().setBuiltInZoomControls(true);
public class MyChromeClient extends WebChromeClient {
#Override
public void onProgressChanged(WebView view, int newProgress) {
try {
if (progressdialog.isShowing()) {
progressdialog.setMessage(getString(R.string.loading)
+ newProgress + " %");
} else {
/*
* webView.stopLoading(); webView.clearView();
*/
}
} catch (Throwable e) {
e.printStackTrace();
}
}
}
you can extends WebViewClient instead of WebChromeClient and override the onPageStarted to show the ProgressBar and dismiss it in onPageReceived
I made some changes in the Activity.
use WebViewClient instead of WebChromeClient
and also use ProgressDialog instead of ProgressBar
public class WebActivity extends Activity {
WebView mWebView;
Context mContext;
ProgressDialog mProgressBar;
private static final int DIALOG2_KEY = 1;
#Override
public void onCreate(Bundle savedInstanceState) {
this.mContext = getApplicationContext();
super.onCreate(savedInstanceState);
setContentView(R.layout.web);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.setWebViewClient(new MyWebChromeClient());
mWebView.getSettings().setBuiltInZoomControls(true);
showDialog(DIALOG2_KEY); }
#Override
protected void onResume() {
super.onResume();
mWebView.loadUrl("YOUR_URL");
}
private final class MyWebChromeClient extends WebViewClient {
#Override
public void onPageFinished(WebView view, String url) {
dismissDialog(DIALOG2_KEY);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("file")) {
return false;
} else{
view.loadUrl(url);
return true;
}
}
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id)
{
case DIALOG2_KEY:
{
mProgressBar.setMessage("Loading");
mProgressBar.setIndeterminate(true);
mProgressBar.setCancelable(false);
return mProgressBar;
}
}
return null;
}
}
Hope this help you
I want to get a return value from Javascript in Android. I can do it with the iPhone, but I can't with Android. I used loadUrl, but it returned void instead of an object. Can anybody help me?
Same as Keith but shorter answer
webView.addJavascriptInterface(this, "android");
webView.loadUrl("javascript:android.onData(functionThatReturnsSomething)");
And implement the function
#JavascriptInterface
public void onData(String value) {
//.. do something with the data
}
Don't forget to remove the onData from proguard list (if you have enabled proguard)
Here's a hack on how you can accomplish it:
Add this Client to your WebView:
final class MyWebChromeClient extends WebChromeClient {
#Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d("LogTag", message);
result.confirm();
return true;
}
}
Now in your javascript call do:
webView.loadUrl("javascript:alert(functionThatReturnsSomething)");
Now in the onJsAlert call "message" will contain the returned value.
Use addJavascriptInterface() to add a Java object to the Javascript environment. Have your Javascript call a method on that Java object to supply its "return value".
Here's what I came up with today. It's thread-safe, reasonably efficient, and allows for synchronous Javascript execution from Java for an Android WebView.
Works in Android 2.2 and up. (Requires commons-lang because I need my code snippets passed to eval() as a Javascript string. You could remove this dependency by wrapping the code not in quotation marks, but in function(){})
First, add this to your Javascript file:
function evalJsForAndroid(evalJs_index, jsString) {
var evalJs_result = "";
try {
evalJs_result = ""+eval(jsString);
} catch (e) {
console.log(e);
}
androidInterface.processReturnValue(evalJs_index, evalJs_result);
}
Then, add this to your Android activity:
private Handler handler = new Handler();
private final AtomicInteger evalJsIndex = new AtomicInteger(0);
private final Map<Integer, String> jsReturnValues = new HashMap<Integer, String>();
private final Object jsReturnValueLock = new Object();
private WebView webView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
webView = (WebView) findViewById(R.id.webView);
webView.addJavascriptInterface(new MyJavascriptInterface(this), "androidInterface");
}
public String evalJs(final String js) {
final int index = evalJsIndex.incrementAndGet();
handler.post(new Runnable() {
public void run() {
webView.loadUrl("javascript:evalJsForAndroid(" + index + ", " +
"\"" + StringEscapeUtils.escapeEcmaScript(js) + "\")");
}
});
return waitForJsReturnValue(index, 10000);
}
private String waitForJsReturnValue(int index, int waitMs) {
long start = System.currentTimeMillis();
while (true) {
long elapsed = System.currentTimeMillis() - start;
if (elapsed > waitMs)
break;
synchronized (jsReturnValueLock) {
String value = jsReturnValues.remove(index);
if (value != null)
return value;
long toWait = waitMs - (System.currentTimeMillis() - start);
if (toWait > 0)
try {
jsReturnValueLock.wait(toWait);
} catch (InterruptedException e) {
break;
}
else
break;
}
}
Log.e("MyActivity", "Giving up; waited " + (waitMs/1000) + "sec for return value " + index);
return "";
}
private void processJsReturnValue(int index, String value) {
synchronized (jsReturnValueLock) {
jsReturnValues.put(index, value);
jsReturnValueLock.notifyAll();
}
}
private static class MyJavascriptInterface {
private MyActivity activity;
public MyJavascriptInterface(MyActivity activity) {
this.activity = activity;
}
// this annotation is required in Jelly Bean and later:
#JavascriptInterface
public void processReturnValue(int index, String value) {
activity.processJsReturnValue(index, value);
}
}
On API 19+, the best way to do this is to call evaluateJavascript on your WebView:
webView.evaluateJavascript("foo.bar()", new ValueCallback<String>() {
#Override public void onReceiveValue(String value) {
// value is the result returned by the Javascript as JSON
}
});
Related answer with more detail: https://stackoverflow.com/a/20377857
The solution that #Felix Khazin suggested works, but there is one key point missing.
The javascript call should be made after the web page in the WebView is loaded. Add this WebViewClient to the WebView, along with the WebChromeClient.
Full Example:
#Override
public void onCreate(Bundle savedInstanceState) {
...
WebView webView = (WebView) findViewById(R.id.web_view);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new MyWebViewClient());
webView.setWebChromeClient(new MyWebChromeClient());
webView.loadUrl("http://example.com");
}
private class MyWebViewClient extends WebViewClient {
#Override
public void onPageFinished (WebView view, String url){
view.loadUrl("javascript:alert(functionThatReturnsSomething())");
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false;
}
}
private class MyWebChromeClient extends WebChromeClient {
#Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d("LogTag", message);
result.confirm();
return true;
}
}
As an alternative variant that uses a custom scheme to communicate Android native code <-> HTML/JS code. for example MRAID uses this technic[About]
MainActivity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
WebView.setWebContentsDebuggingEnabled(true);
}
final WebView webview = new CustomWebView(this);
setContentView(webview);
webview.loadUrl("file:///android_asset/customPage.html");
webview.postDelayed(new Runnable() {
#Override
public void run() {
//Android -> JS
webview.loadUrl("javascript:showToast()");
}
}, 1000);
}
}
CustomWebView
public class CustomWebView extends WebView {
public CustomWebView(Context context) {
super(context);
setup();
}
#SuppressLint("SetJavaScriptEnabled")
private void setup() {
setWebViewClient(new AdWebViewClient());
getSettings().setJavaScriptEnabled(true);
}
private class AdWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("customschema://")) {
//parse uri
Toast.makeText(CustomWebView.this.getContext(), "event was received", Toast.LENGTH_SHORT).show();
return true;
}
return false;
}
}
}
customPage.html (located in the assets folded)
<!DOCTYPE html>
<html>
<head>
<title>JavaScript View</title>
<script type="text/javascript">
<!--JS -> Android-->
function showToast() {
window.location = "customschema://goto/";
}
</script>
</head>
<body>
</body>
</html>
You can do it like this:
[Activity(Label = "#string/app_name", Theme = "#style/AppTheme", MainLauncher = true)]
public class MainActivity : AppCompatActivity
{
public WebView web_view;
public static TextView textView;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
Window.AddFlags(WindowManagerFlags.Fullscreen);
Window.ClearFlags(WindowManagerFlags.ForceNotFullscreen);
// Set our view from the "main" layout resource
SetContentView (Resource.Layout.main);
web_view = FindViewById<WebView>(Resource.Id.webView);
textView = FindViewById<TextView>(Resource.Id.textView);
web_view.Settings.JavaScriptEnabled = true;
web_view.SetWebViewClient(new SMOSWebViewClient());
web_view.LoadUrl("https://stns.egyptair.com");
}
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
{
Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
public class SMOSWebViewClient : WebViewClient
{
public override bool ShouldOverrideUrlLoading(WebView view, IWebResourceRequest request)
{
view.LoadUrl(request.Url.ToString());
return false;
}
public override void OnPageFinished(WebView view, string url)
{
view.EvaluateJavascript("document.getElementsByClassName('notf')[0].innerHTML;", new JavascriptResult());
}
}
public class JavascriptResult : Java.Lang.Object, IValueCallback
{
public string Result;
public void OnReceiveValue(Java.Lang.Object result)
{
string json = ((Java.Lang.String)result).ToString();
Result = json;
MainActivity.textView.Text = Result.Replace("\"", string.Empty);
}
}