I have developed a web app that displays a list of pdf documents hosted on a web server. This app is embedded in a webview app for android however when I load the app on my phone, selection of a pdf link does nothing. What am I doing wrong? Thanks
Heres the java code:
package com.hellowebview;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class HellowebviewActivity extends Activity {
/** Called when the activity is first created. */
private WebView mWebView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl("http://aipnz.webs.com");
mWebView.setWebViewClient(new HelloWebViewClient());
mWebView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView webview, String url)
{
webview.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack())
{
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
If you want to load pdf you can use Google docs to load it.
String googleDocs = "https://docs.google.com/viewer?url=";
String pdf_url = "http://kronox.org/documentacion/Hello.Android.new.pdf";
webView.loadUrl(googleDocs + pdf_url);
NOTE: You need android.permission.INTERNET in Manifest file
Just create an Intent in your shouldOverrideUrlLoading method:
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if ( urlIsPDF(url)){
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "application/pdf");
try{
view.getContext().startActivity(intent);
} catch (ActivityNotFoundException e) {
//user does not have a pdf viewer installed
}
} else {
webview.loadUrl(url);
}
return true;
}
And then whenever a user clicks a PDF link in a page within your webview, the file will open in an external PDF app.
webView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.endsWith(".pdf")) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "application/pdf");
try {
view.getContext().startActivity(intent);
} catch (ActivityNotFoundException e) {
//user does not have a pdf viewer installed
}
} else {
webView.loadUrl(url);
}
return true;
}
}
This is the solution I use:
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.endsWith(".pdf")){
String pdfUrl = googleDocs + url;
view.loadUrl(pdfUrl);
} else {
view.loadUrl(url);
}
return true;
}
with
private final String googleDocs = "https://docs.google.com/viewer?url=";
You have to override shouldOverrideUrlLoading method in WebClient. I use this approach with combination of intent and Google Docs as a backup:
/* You might want to move this string definition somewhere else */
final String googleDocs = "https://docs.google.com/viewer?url=";
WebView webView = new WebView(getContext());
//webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView webView, String url) {
if (url.endsWith(".pdf")) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "application/pdf");
/* Check if there is any application capable to process PDF file. */
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
} else {
/* If not, show PDF in Google Docs instead. */
view.loadUrl(googleDocs + url);
}
} else {
webView.loadUrl(url);
}
return true;
}
});
You might need to change passing the context and accessing startActivity method, but other than that it should run as it is.
Also note that since API 24, there are 2 shouldOverrideUrlLoading methods you can override. As it is stated here from #CommonsWare, it is OK to override deprecated method.
use loadurl another overloaded methods...and write internet permission
Sharing this answer as I tried all the above solutions but did not work for me, this is Kotlin code (not javascript)
myWebView.setWebViewClient(object:WebViewClient() {
override fun shouldOverrideUrlLoading(view:WebView, url:String):Boolean {
if (url.endsWith(".pdf"))
{
val intent = Intent(Intent.ACTION_VIEW)
intent.setDataAndType(android.net.Uri.parse(url), "application/pdf")
try
{
view.getContext().startActivity(intent)
}
catch (e:ActivityNotFoundException) {
//user does not have a pdf viewer installed
}
}
else
{
myWebView.loadUrl(url)
}
return true
}
})
Related
Trying to make WebView based app launcher/drawer for a kiosk application. Idea is you do not need to know Android to launch apps, just how to build intent links. Been through several iterations and answers and can't quite get this right. Target is Android 10.
Currently the intent test links work fine from Chrome, but fail to launch for the WebView. I believe the issue is with resolving the activity from the package manager?
WebView Window Class
public class Window {
private Context context;
private View mView;
private WindowManager.LayoutParams mParams;
private WindowManager mWindowManager;
private LayoutInflater layoutInflater;
public Window(Context context){
this.context=context;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
mParams = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
}
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mView = layoutInflater.inflate(R.layout.popup_window, null);
mParams.gravity = Gravity.CENTER;
mWindowManager = (WindowManager)context.getSystemService(WINDOW_SERVICE);
//setup webview
WebView myWebView = (WebView) mView.findViewById(R.id.webview);
WebSettings webSettings = myWebView.getSettings();
myWebView.setBackgroundColor(Color.argb(1, 255, 255, 255));
webSettings.setJavaScriptEnabled(true);
//create webviewclient
myWebView.setWebViewClient(new WebViewClient() {
#SuppressWarnings("deprecation")
public boolean shouldOverrideUrlLoading(WebView view, String url) {
final Uri uri = Uri.parse(url);
return handleUri(view, uri);
}
#TargetApi(Build.VERSION_CODES.N)
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
final Uri uri = request.getUrl();
return handleUri(view, uri);
}
private boolean handleUri(WebView view, Uri uri) {
final String url = String.valueOf(uri);
if (url.startsWith("intent://")) {
try {
Context context = view.getContext();
Intent intent = Intent.parseUri(url, Intent.URI_INTENT_SCHEME);
//intent.addCategory(Intent.CATEGORY_BROWSABLE);
intent.addFlags(Intent.FLAG_ACTIVITY_REQUIRE_NON_BROWSER);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (intent != null) {
view.stopLoading();
PackageManager packageManager = context.getPackageManager();
ResolveInfo info = packageManager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
context.startActivity(intent);
if (info != null) {
context.startActivity(intent);
} else {
String fallbackUrl = intent.getStringExtra("browser_fallback_url");
view.loadUrl(fallbackUrl);
}
return true;
}
} catch (URISyntaxException e) {
Log.e(TAG, "Can't resolve intent://", e);
}
}
return false;
}
});
myWebView.loadUrl("file:///android_asset/index.html");
};
public void open() {
try {
if(mView.getWindowToken()==null) {
if(mView.getParent()==null) {
mWindowManager.addView(mView, mParams);
}
}
} catch (Exception e) {
Log.d("Error1",e.toString());
}
}
public void close() {
try {
((WindowManager)context.getSystemService(WINDOW_SERVICE)).removeView(mView);
mView.invalidate();
((ViewGroup)mView.getParent()).removeAllViews();
} catch (Exception e) {
Log.d("Error2",e.toString());
}
}
}
Barebones test HTML file
<!DOCTYPE html> <html>
<body>
<button>
Slack
</button>
<button>
Zoom
</button>
<button>
Zoom Room
</button>
</body> </html>
I am also not keen on checking for the existence of intents:// since Slack for example eschews that and instead wants you to use slack://open. Is there a documented way to emulate opening these kinds of links from a Webview like Chrome does?
So I am stuck on a issue with my webapp that runs inside a webview from android studio.
I want download like pdf file to be downloaded and opend in the native app on the phone. This work fine by using the download manager from android studio.
How ever I also have links that start with "mailto:" and "tel:" those links give me an error when I don't override the method "shouldOverrideUrlLoading" where I can check what kind of url it is. And then open the propper inten.
So when I combine the 2 the downloadmanager and the custom NavigationHandler that extends the WebViewClient, it doesn't work as expected.
For a better understanding of what is happening.
When I hit a button with a pdf file it downloads the file gives a toast message and opens the file with the native app on the phone. This is without overriding the "shouldOverrideURLLoading" and without my class that extends the WebViewClient.
When I also use my own NavigationHandler witch extends from WebViewClient,
my urls with "mailto:" and "tel:" open with native apps on the phone.
When I now hit a button with a pdf file it is opend in a browser to be downloaded. Witch I don't want. I have tried numerous things to solf the problem but until now without succes.
I run a website app inside of a WebViewClient.
P.S. sorry for the shitty code but it's new to me and haven't find my way jet in coding in Android Studio.
My NavigationHandler class
package nl.firejob.selector;
import android.content.Intent;
import android.net.Uri;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class NavigationHandler extends WebViewClient {
private static final String TEL_PREFIX = "tel:";
private static final String MAILTO_PREFIX = "mailto:";
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if ( url.startsWith( TEL_PREFIX ) ) {
// This is a tel link, which should be opened with the native thing.
Intent tel = new Intent( Intent.ACTION_DIAL, Uri.parse( url ) );
view.getContext().startActivity( tel );
return true;
} else if ( url.startsWith( MAILTO_PREFIX ) ) {
// This is a mail link, which should be opened with the other native thing.
Intent mail = new Intent(Intent.ACTION_SENDTO);
mail.setType("message/rfc822");
mail.setData(Uri.parse( url ));
view.getContext().startActivity( mail );
return true;
} else if ( Uri.parse(url).getHost().startsWith("myurl.com") ) {
// This is what we want to show in the app, so let the WebView handle it.
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse( url ) );
view.getContext().startActivity( intent );
return true;
}
}
My MainActivity Class
package nl.firejob.selector;
import android.Manifest;
import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.DownloadListener;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.Toast;
import java.io.File;
public class MainActivity extends AppCompatActivity {
private WebView mWebView;
private DownloadManager dm;
private Long myDownloadReference;
private BroadcastReceiver receiveDownloadComplete;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.webView);
// Allow webview to use javascript
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
// Stop local links/redirects from opening in browser instead of WebView
mWebView.setWebViewClient(new NavigationHandler() {
#Override
public void onPageFinished(WebView view, String url) {
// Show the webview
findViewById(R.id.webView).setVisibility(View.VISIBLE);
// Hide splashscreen objects
findViewById(R.id.imageLogo).setVisibility(View.GONE);
findViewById(R.id.textLogo).setVisibility(View.GONE);
}
});
mWebView.setDownloadListener(new DownloadListener() {
#Override
public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
if( haveStoragePermission()) {
Log.i("download url",url);
//for downloading directly through download manager
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.allowScanningByMediaScanner();
request.setVisibleInDownloadsUi(true);
request.setDescription("Doorvoerboek").setTitle("doorvoerboek.pdf");
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "doorvoerboek.pdf");
dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
myDownloadReference = dm.enqueue(request);
IntentFilter intentFilter = new IntentFilter( dm.ACTION_DOWNLOAD_COMPLETE);
receiveDownloadComplete = new BroadcastReceiver(){
#Override
public void onReceive(Context context, Intent intent) {
long reference = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
if (myDownloadReference == reference) {
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(reference);
Cursor cursor = dm.query(query);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
int status = cursor.getInt(columnIndex);
int fileNameIndex = cursor.getColumnIndex(DownloadManager.COLUMN_TITLE);
String saveFilePath = cursor.getString(fileNameIndex);
Log.i("filename",saveFilePath);
int columnReason = cursor.getColumnIndex(DownloadManager.COLUMN_REASON);
int reason = cursor.getInt(columnReason);
switch (status){
case DownloadManager.STATUS_SUCCESSFUL:
Toast.makeText(MainActivity.this, "Download Complete", Toast.LENGTH_LONG).show();
Log.i("dir", Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath() );
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath() +"/doorvoerboek.pdf");
Intent intentView = new Intent(Intent.ACTION_VIEW);
intentView.setDataAndType(Uri.fromFile(file),"application/pdf");
intentView.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intentView);
break;
}
}
}
};
registerReceiver(receiveDownloadComplete,intentFilter);
}
}
});
mWebView.loadUrl("http://myurl.com/");
}
public boolean haveStoragePermission() {
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
Log.e("Permission error","You have permission");
return true;
} else {
Log.e("Permission error","You have asked for permission");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
return false;
}
}
else { //you dont need to worry about these stuff below api level 23
Log.e("Permission error","You already have the permission");
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
//if Back key pressed and webview can navigate to previous page
mWebView.goBack();
// go back to previous page
return true;
}
else
{
finish();
// finish the activity
}
return super.onKeyDown(keyCode, event);
}
}
This code downloads any file.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webview = (WebView) findViewById(R.id.webView);
spinner = (ProgressBar) findViewById(R.id.progressBar1);
webview.setWebViewClient(new CustomWebViewClient());
webview.getSettings().setUseWideViewPort(true);
webview.getSettings().setLoadWithOverviewMode(true);
webview.getSettings().setBuiltInZoomControls(true);
webview.getSettings().setDisplayZoomControls(false);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setDomStorageEnabled(true);
webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
webview.loadUrl("http://www.website.com");
//Download file code stackoverflow.com
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);
DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getApplicationContext(), "downloading",
Toast.LENGTH_LONG).show();
}
});
// Download section of code
} // Close of onCreate
// mailto code stackoverflow.com
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if( url.startsWith("http:") || url.startsWith("https:") ) {
return false;
}
// Otherwise allow the OS to handle it
else if (url.startsWith("tel:")) {
Intent tel = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
startActivity(tel);
return true;
}
else if (url.startsWith("mailto:")) {
String body = "Enter your Question, Enquiry or Feedback below:\n\n";
Intent mail = new Intent(Intent.ACTION_SEND);
Intent intent = mail.setType("application/octet-stream");
MailTo recipient = MailTo.parse(url);
mail.putExtra(Intent.EXTRA_EMAIL, new String[]{recipient.getTo()});
mail.putExtra(Intent.EXTRA_SUBJECT, "Contact");
mail.putExtra(Intent.EXTRA_TEXT, body);
startActivity(mail);
return true;
}
return true;
}
}
// mailto section of code
I am a beginner in making android applications. I have made a web application in HTML which i want to be able to use in my application that I am making in android studio. I managed to make a simple web view in android studio which makes my web application work fine when i test it on my device. The only problem is that the web view handles all the URL´s inside my web application. The web application consists of tabs that directs me to different pages when i click on them which is what i want. But I have contact-buttons and different links that i want to be "released" from the web view. Lets take the contact button as an example. I have a Galaxy note which I am using to test my apps. When i open my application on my phone i see my Web application and i can navigate around. When i click the contact button, the web view handles the link and gives me a "page could not load" instead of opening the mail application on my phone. I also have buttons with links that I want to be able to open in an external browser on my phone. I hope you understand my problem and I am sorry for my bad english.
This is some of my code for the web view.
Mainactivity.java
public class MainActivity extends ActionBarActivity {
WebView browser;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
browser = (WebView) findViewById(R.id.wvwMain);
browser.getSettings().setJavaScriptEnabled(true);
browser.getSettings().setLoadWithOverviewMode(true);
browser.getSettings().setUseWideViewPort(true);
browser.setWebViewClient(new ourViewClient());
try {
browser.loadUrl("http://WebAppURL");
} catch (Exception e) {
e.printStackTrace();
}
}
OurViewClient.java
public class ourViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
Try this way implement your WebViewClient like
private class VideoWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
try{
System.out.println("url called:::" + url);
if (url.startsWith("tel:")) {
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
startActivity(intent);
} else if (url.startsWith("http:")
|| url.startsWith("https:")) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
} else if (url.startsWith("mailto:")) {
MailTo mt=MailTo.parse(url);
send_email(mt.getTo());
}
else {
return false;
}
}catch(Exception e){
e.printStackTrace();
}
return true;
}
}
and create send mail function like
public void send_email(String email_add) {
System.out.println("Email address::::" + email_add);
final Intent emailIntent = new Intent(
android.content.Intent.ACTION_SEND);
emailIntent.setType("plain/text");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
new String[] { email_add });
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "");
emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "");
yourActivity.this.startActivity(
Intent.createChooser(emailIntent, "Send mail..."));
}
My Code Working Good, just Remember the code line Sequence and placement.. Copy and paste code in your mainactivity.java file
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mywebView = findViewById(R.id.myview);
WebSettings webSettings = mywebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mywebView.loadUrl("http://yourwebsitename.com");
mywebView.setWebViewClient(new MyCustomWebViewClient());
}
class MyCustomWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("yourwebsitename.com")) {
//open url contents in webview
return false;
} else {
//here open external links in external browser or app
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
}
}
I make webview application. i want open both urls "rtsp://" and "market://" in default video player and play store.
i use this code. but problem is "market://" url open in play store correctly but rtsp link not open in default video player. error says page not found.
public class MainActivity extends Activity {
//private Button button;
private WebView webView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webView1);
startWebView("http://google.com");
this.webView.setWebViewClient(new WebViewClient());
this.webView.setDownloadListener(new DownloadListener()
{
public void onDownloadStart(String paramAnonymousString1, String paramAnonymousString2, String paramAnonymousString3, String paramAnonymousString4, long paramAnonymousLong)
{
Intent localIntent = new Intent("android.intent.action.VIEW", Uri.parse(paramAnonymousString1));
MainActivity.this.startActivity(localIntent);
}
});
this.webView.setWebViewClient(new WebViewClient()
{
public boolean shouldOverrideUrlLoading(WebView paramAnonymousWebView, String paramAnonymousString)
{
if (paramAnonymousString.startsWith("rtsp"))
{
Intent localIntent = new Intent("android.intent.action.VIEW", Uri.parse(paramAnonymousString));
MainActivity.this.startActivity(localIntent);
return true;
}
return super.shouldOverrideUrlLoading(paramAnonymousWebView, paramAnonymousString);
}
});
this.webView.setWebViewClient(new WebViewClient()
{
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getScheme().equals("market")) {
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
Activity host = (Activity) view.getContext();
host.startActivity(intent);
return true;
} catch (ActivityNotFoundException e) {
// Google Play app is not installed, you may want to open the app store link
Uri uri = Uri.parse(url);
view.loadUrl("http://play.google.com/store/apps/" + uri.getHost() + "?" + uri.getQuery());
return false;
}
}
return false;
}
});
}
This question already has answers here:
Save webview content for offline browsing?
(2 answers)
Closed 8 years ago.
How to show web page even if internet is not connected? And if internet is connected than website should be loaded on webview
..
I am new for android and i needed an app. i checked over internet and created app.
my dashboard code is :
public class Dashboard extends Activity {
public String BASE_URL = "http://mywebsite.com/";
public String DASHBOARD_URL = BASE_URL;
private JavascriptInterface jsInterface;
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dashboard);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
WebView engine = (WebView) findViewById(R.id.web_engine);
// Progress bar.
// With full screen app, window progress bar (FEATURE_PROGRESS) doesn't seem to show,
// so we use an explicitly created one.
final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressbar);
engine.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress)
{
progressBar.setProgress(progress);
}
});
engine.setWebViewClient(new FixedWebViewClient() {
public void onPageStarted(WebView view, String url, Bitmap favicon)
{
jsInterface.enablePreferencesMenu = false;
jsInterface.modalIsVisible = false;
jsInterface.urlForSharing = null;
progressBar.setVisibility(View.VISIBLE);
}
public void onPageFinished(WebView view, String url)
{
progressBar.setVisibility(View.GONE);
}
});
engine.getSettings().setJavaScriptEnabled(true);
jsInterface = new JavascriptInterface();
try {
ComponentName comp = new ComponentName(this, Dashboard.class);
PackageInfo pinfo = getPackageManager().getPackageInfo(comp.getPackageName(), 0);
jsInterface.versionCode = pinfo.versionCode;
} catch(android.content.pm.PackageManager.NameNotFoundException e) {
}
engine.addJavascriptInterface(jsInterface, "Title");
engine.loadUrl(BASE_URL);
}
private WebView getEngine() {
return (WebView) findViewById(R.id.web_engine);
}
public void onBackPressed() {
WebView engine = getEngine();
String url = engine.getUrl();
if (jsInterface.modalIsVisible) {
engine.loadUrl("javascript: android.hideModal();");
} else if (url != null && (
url.equals(BASE_URL) ||
url.equals(DASHBOARD_URL) ||
!engine.canGoBack())) {
// exit
super.onBackPressed();
} else {
// go back a page, like normal browser
engine.goBack();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
MenuItem prefs = menu.findItem(R.id.preferences_menuitem);
if (prefs != null) {
prefs.setVisible(jsInterface.enablePreferencesMenu);
}
super.onPrepareOptionsMenu(menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.dashboard_menuitem:
getEngine().loadUrl(DASHBOARD_URL);
return true;
case R.id.refresh_menuitem:
getEngine().reload();
return true;
case R.id.preferences_menuitem:
getEngine().loadUrl("javascript: android.showPreferences()");
return true;
case R.id.contact_menuitem:
AboutBox.Show(Dashboard.this);
return true;
case R.id.share_url_menuitem:
final String url = (jsInterface.urlForSharing != null
? jsInterface.urlForSharing
: getEngine().getUrl());
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("text/plain");
i.putExtra(Intent.EXTRA_SUBJECT, "Android URL");
i.putExtra(Intent.EXTRA_TEXT, url);
startActivity(Intent.createChooser(i, "Share"));
default:
return super.onOptionsItemSelected(item);
}
}
private class FixedWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith(BASE_URL) || url.startsWith("javascript:")) {
// handle by the WebView
return false;
} else if (url.startsWith("mailto:")) {
MailTo mt = MailTo.parse(url);
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("message/rfc822");
i.putExtra(Intent.EXTRA_EMAIL, new String[]{mt.getTo()});
i.putExtra(Intent.EXTRA_SUBJECT, mt.getSubject());
i.putExtra(Intent.EXTRA_CC, mt.getCc());
i.putExtra(Intent.EXTRA_TEXT, mt.getBody());
view.getContext().startActivity(i);
view.reload();
return true;
} else {
// Use external browser for anything not on this site
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(i);
return true;
}
}
}
// The methods of JavascriptInterface are called from javascript.
// The attributes are accessed from the Dashboard class.
// This is deliberately a dumb container class to stop possible
// security issues of javascript controlling Java app.
final class JavascriptInterface {
public boolean enablePreferencesMenu = false;
public boolean modalIsVisible = false;
public int versionCode = 0;
public String urlForSharing = null;
public void setEnablePreferencesMenu() {
enablePreferencesMenu = true;
}
public void setModalIsVisible(boolean visible) {
modalIsVisible = visible;
}
// This is useful for allowing the web site to be able to detect
// old app versions and prompt the user to upgrade.
public int getVersionCode() {
return versionCode;
}
public void setUrlForSharing(String url) {
urlForSharing = url;
}
}
}
Where should i edit to show no network connected message if device is not connected to internet???
First you need to check whether or not internet is connected to your device, you can check internet connection with below method
public static boolean checkNetworkConnection(Context _context){
ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null)
{
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED)
{
return true;
}
}
return false;
}
This method will return either true[If internet is connected] or false[if not connected]
Based on that true or false value you can decide whether to display html page or web page
Now Question is if you want to display webpage from your local folder than you can do it like this
You can load local html file as below
WebView lWebView = (WebView)findViewById(R.id.webView);
File lFile = new File(Environment.getExternalStorageDirectory() + "<FOLDER_PATH_TO_FILE>/<FILE_NAME>");
lWebView.loadUrl("file:///" + lFile.getAbsolutePath());
And if you want to display cahed html page than you need to do some R & D task for that.
Now if internet is connected than you can use below method to display web page on webview
wbb = (WebView) findViewById(R.id.webView_tobe_loaded);
WebSettings wbset=wbb.getSettings();
wbset.setJavaScriptEnabled(true);
wbb.setWebViewClient(new MyWebViewClient());
String url="http://www.google.com";
System.out.println(getdeviceid());
wbb.getSettings().setJavaScriptEnabled(true);
wbb.loadUrl(url);
I hope you understood all the explanation
You can check for internet connection using this:
ConnectivityManager cm =
(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null &&
activeNetwork.isConnectedOrConnecting();
more info here: http://developer.android.com/training/monitoring-device-state/connectivity-monitoring.html
And to show HTML without load it from the internet:
webview.loadData("<b>Connection not availeable</b>", "text/html", null);
more info: http://developer.android.com/reference/android/webkit/WebView.html#loadData(java.lang.String,java.lang.String, java.lang.String)