foursquare authorize url is not loading in android webview - foursquare

My login webview is not loading in android.But months ago it was fine.
I also wrote a project for accessing foursquare from android.
https://github.com/goutomroy/DroidSquare/blob/master/README.md
When I am trying to load webview, I found message :
"The connection to the server was unsuccessful"
Where is my fault ?
#SuppressLint("SetJavaScriptEnabled")
private void setUpWebView() {
String URL_LOGIN = "https://foursquare.com/oauth2/authenticate?"
+ "client_id="+ FoursquareConstants.CLIENT_ID
+ "&response_type=code"
+ "&display=touch"
+ "&redirect_uri=" + FoursquareConstants.URL_CALLBACK;
CookieSyncManager.createInstance(activity);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.acceptCookie();
cookieManager.removeAllCookie();
webView = new WebView(getContext());
WebSettings settings = webView.getSettings();
settings.setJavaScriptEnabled(true);
settings.setDomStorageEnabled(true);
settings.setLoadWithOverviewMode(true);
settings.setUseWideViewPort(true);
settings.setBuiltInZoomControls(true);
settings.setPluginState(PluginState.ON);
webView.setVerticalScrollBarEnabled(true);
webView.setHorizontalScrollBarEnabled(true);
webView.setWebViewClient(new FoursquareWebViewClient());
webView.loadUrl(URL_LOGIN);
setContentView(webView);
}
class FoursquareWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false;
}
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Log.d("onReceivedError", errorCode +" : "+description+ " : " + failingUrl);
super.onReceivedError(view, errorCode, description, failingUrl);
dismissProgressDialog();
LoginDialog.this.dismiss();
responseHandler.onError(description);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Log.d("onPageStarted", url);
super.onPageStarted(view, url, favicon);
if(flag)
return;
else if (url.startsWith(FoursquareConstants.URL_CALLBACK)) {
flag = true;
String urls[] = url.split("=");
responseHandler.onSuccess(urls[1]);
LoginDialog.this.dismiss();
return;
}
else
showOrUpdateProgressDialog("Loading...");
}
#Override
public void onPageFinished(WebView view, String url) {
Log.d("onPageFinished", url);
super.onPageFinished(view, url);
dismissProgressDialog();
}
#Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
Log.d("onReceivedSslError", "error");
handler.proceed(); // Ignore SSL certificate errors
}
}

You should check for the internet permission at manifest file
<manifest xlmns:android...>
...
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
</manifest>

Related

SQL Server - Login failed for user (Android Studio)

I have written code using JDBC to create registration page in Android Studio. I create database in SQL Server 2019. In addition I tried to connect from the code to MSSQL database and insert values, but while I run the app I'm getting the error:
login failed for user.
I have examined many options that can cause this error and I fixed them. For example: The server authentication is SQL Server authentication,the TCP option at the server is enabled, I have the relevant permissions of the user, also I check the if the firewall is the cause for this error. However, I continue to receive the error.
The connection class:
public class ConnectionClass {
public static String ip= "***.***.*.*:1433"; //
public static String user_name ="****";
public static String password = "****";
public static String database = "tests";
}
The Registeration class:
EditText email;
EditText password;
EditText confirmPassword;
Button sign_up;
EditText name;
Connection connection1;
Statement statement;
TextView status;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sign_up_parent);
email = (EditText) findViewById(R.id.editTextTextEmailAddress2);
password = (EditText) findViewById(R.id.editTextTextPassword);
confirmPassword = (EditText) findViewById(R.id.editTextTextPassword2);
sign_up = (Button) findViewById(R.id.button);
name = (EditText) findViewById(R.id.editTextTextPassword3);
status = (TextView) findViewById(R.id.status);
sign_up.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new ParentSignUp.registerUser().execute("");
}
});
}
public class registerUser extends AsyncTask<String, String, String>{
String z ="";
Boolean isSuccess = false;
public registerUser() {
super();
}
#Override
protected void onPreExecute() {
status.setText("Sending Data to Database");
}
#Override
protected void onPostExecute(String s) {
name.setText("");
email.setText("");
password.setText("");
confirmPassword.setText("");
}
#Override
protected String doInBackground(String... strings) {
try {
connection1 = connection_class(ConnectionClass.user_name.toString(), ConnectionClass.password.toString(),
ConnectionClass.database.toString(), ConnectionClass.ip.toString());
if (connection1 == null) {
z = "Check Internet Connection";
}
else {
String sql = "INSERT INTO test (name,password, email) VALUES ('example', 'example', 'example')";
statement = connection1.createStatement();
statement.executeUpdate(sql);
}
}
catch (Exception e) {
isSuccess = false;
z = e.getMessage();
}
return null;
}
}
#SuppressLint("NewApi")
public Connection connection_class (String user, String password, String database, String server) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Connection connection = null;
String connectionUrl = null;
try{
Class.forName("net.sourceforge.jtds.jdbc.Driver");
connectionUrl = "jdbc:jtds:sqlserver://" + server + "/" + database + ";user=" + user + ";"+"password=" + password + ";";
connection = DriverManager.getConnection(connectionUrl);
}catch (Exception e){
Log.e("SQL Connection Error : ", e.getMessage());
}
return connection;
}

Download File using download manager and save file based on click

I have my download manager, and it work perfect if I try to download a file. But I have a problem.
I have 4 CardView in my activity and I set it onClickListener, so when I click one CardView it will download the file.
Here is the code to call the download function
cardviewR1 = findViewById(R.id.card_viewR1);
cardviewR1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
pDialogDL = new ProgressDialog(this);
pDialogDL.setMessage("A message");
pDialogDL.setIndeterminate(true);
pDialogDL.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialogDL.setCancelable(true);
final DownloadTask downloadTask = new DownloadTask(this);
downloadTask.execute(R1Holder);
pDialogDL.setOnCancelListener(new DialogInterface.OnCancelListener() {
#Override
public void onCancel(DialogInterface dialog) {
downloadTask.cancel(true);
}
});
}
});
and here is the download function
private class DownloadTask extends AsyncTask<String, Integer, String> {
private Context context;
private PowerManager.WakeLock mWakeLock;
public DownloadTask(Context context) {
this.context = context;
}
#Override
protected String doInBackground(String... sUrl) {
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
}
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
// download the file
input = connection.getInputStream();
output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"/"+getString(R.string.r1)+"_"+NameHolder+".zip");
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled()) {
input.close();
return null;
}
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
// take CPU lock to prevent CPU from going off if the user
// presses the power button during download
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
getClass().getName());
mWakeLock.acquire();
pDialogDL.show();
}
#Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
// if we get here, length is known, now set indeterminate to false
pDialogDL.setIndeterminate(false);
pDialogDL.setMax(100);
pDialogDL.setProgress(progress[0]);
}
#Override
protected void onPostExecute(String result) {
mWakeLock.release();
pDialogDL.dismiss();
if (result != null)
Toast.makeText(context, "Download error: " + result, Toast.LENGTH_LONG).show();
else
Toast.makeText(context, "File downloaded", Toast.LENGTH_SHORT).show();
}
}
The code work in my app, but the problem is, when I try to add second CardView which is like this
cardviewR2 = findViewById(R.id.card_viewR2);
cardviewR2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
pDialogDL = new ProgressDialog(this);
pDialogDL.setMessage("A message");
pDialogDL.setIndeterminate(true);
pDialogDL.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialogDL.setCancelable(true);
final DownloadTask downloadTask = new DownloadTask(this);
downloadTask.execute(R2Holder);
pDialogDL.setOnCancelListener(new DialogInterface.OnCancelListener() {
#Override
public void onCancel(DialogInterface dialog) {
downloadTask.cancel(true);
}
});
}
});
Yes it will download the second file, but it will overwrite the first file. I think the problem is right here
output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"/"+getString(R.string.r1)+"_"+NameHolder+".zip");
Anyone can help me with this code?
I need your help, Thanks
Fixed it by create a new Download Class separately in different file with activity, so the AsyncTask will be call again and again
thanks

Image capture with camera & upload to Firebase (Uri in onActivityResult() is null)

So I've got a problem, previously mentioned in the question I've asked: Uploading image (ACTION_IMAGE_CAPTURE) to Firebase storage
I've searched for the issue a bit more, and applied the Android Studio documentation: https://developer.android.com/training/camera/photobasics.html#TaskPhotoView
So, before you read the code, I basically want to say what is needed: I just want to capture a photo with camera and upload it directly to Firebase storage. To do that I need the Uri to contain the picture I just took (Uri.getLastPathSegment()), however I still couldn't succeed doing this.
So now, this is what my code look like (only related parts):
AndroidManifest.xml:
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths"></meta-data>
</provider>
I have the res/xml/file_paths.xml:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="my_images" path="Android/data/com.serjardovic.firebasesandbox/files/Pictures" />
</paths>
and finaly the MainActivity.java:
public class MainActivity extends AppCompatActivity {
private Button b_gallery, b_capture;
private ImageView iv_image;
private StorageReference storage;
private static final int GALLERY_INTENT = 2;
private static final int CAMERA_REQUEST_CODE = 1;
private ProgressDialog progressDialog;
String mCurrentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File...
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, CAMERA_REQUEST_CODE);
}
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
storage = FirebaseStorage.getInstance().getReference();
b_gallery = (Button) findViewById(R.id.b_gallery);
b_capture = (Button) findViewById(R.id.b_capture);
iv_image = (ImageView) findViewById(R.id.iv_image);
progressDialog = new ProgressDialog(this);
b_capture.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
dispatchTakePictureIntent();
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK){
progressDialog.setMessage("Uploading...");
progressDialog.show();
Uri uri = data.getData();
StorageReference filepath = storage.child("Photos").child(uri.getLastPathSegment());
filepath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
#Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Toast.makeText(MainActivity.this, "Upload Successful!", Toast.LENGTH_SHORT).show();
progressDialog.dismiss();
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(MainActivity.this, "Upload Failed!", Toast.LENGTH_SHORT).show();
}
});
}
}
}
Need a solution! Still, the app crashes after I take the picture and press the confirm button and I get the following crash report:
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.serjardovic.firebasesandbox/com.serjardovic.firebasesandbox.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.net.Uri android.content.Intent.getData()' on a null object reference
Try changing mCurrentPhotoPath = image.getAbsolutePath(); to mCurrentPhotoPath = "file:" + image.getAbsolutePath();.
I didnt spot any other differences from my code, which has worked.
So the answer is simple, thanks to #wilkas help in the comments. I just forgot to add the photoURI into filepath.putFile(photoURI), it was just filepath.putFile(uri), so the addition of code simply did nothing until I notices this. Hope this Q&A will help someone else with a similar problem!

Xamarin QLPreviewController + NavigationPage broken on iOS 10

After updating the device to iOS 10, QLPreviewController stopped to display correctly the documents. It shows the white screen.
I have extracted the sample scenario from the app.
It contains single page with two buttons that should load two different documents:
<?xml version="1.0" encoding="utf-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:QuickLookIOS10Test"
x:Class="QuickLookIOS10Test.QuickLookIOS10TestPage">
<StackLayout Orientation="Vertical">
<Button Text="Load first doc" Clicked="OnLoadFirstClicked"/>
<Button Text="Load second doc" Clicked="OnLoadSecondClicked"/>
<Button Text="Navigate forward" Clicked="OnForwardClicked"/>
<local:QLDocumentView
x:Name="DocumentView"
BackgroundColor="Silver"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"/>
</StackLayout>
</ContentPage>
where:
public class QLDocumentView : View
{
public static readonly BindableProperty FilePathProperty =
BindableProperty.Create(nameof(FilePath), typeof(string), typeof(QLDocumentView), null);
public string FilePath
{
get { return (string)GetValue(FilePathProperty); }
set { SetValue(FilePathProperty, value); }
}
}
There is a custom renderer involved:
public class QLDocumentViewRenderer : ViewRenderer<QLDocumentView, UIView>
{
private QLPreviewController controller;
public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
//This is a fix to prevent incorrect scaling after rotating from portrait to landscape.
//No idea why does this work :( Bug #101639
return new SizeRequest(Size.Zero, Size.Zero);
}
protected override void OnElementChanged(ElementChangedEventArgs<QLDocumentView> e)
{
base.OnElementChanged(e);
if (Control == null)
{
controller = new QLPreviewController();
SetNativeControl(controller.View);
}
RefreshView();
}
protected override void OnElementPropertyChanged(object sender,
System.ComponentModel.PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == QLDocumentView.FilePathProperty.PropertyName)
{
RefreshView();
}
}
private void RefreshView()
{
DisposeDataSource();
if (Element?.FilePath != null)
{
controller.DataSource = new DocumentQLPreviewControllerDataSource(Element.FilePath);
}
controller.ReloadData();
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing)
{
DisposeDataSource();
DisposeController();
}
}
private void DisposeDataSource()
{
var dataSource = controller.DataSource;
controller.DataSource = null;
dataSource?.Dispose();
}
private void DisposeController()
{
controller?.Dispose();
controller = null;
}
private class DocumentQLPreviewControllerDataSource : QLPreviewControllerDataSource
{
private readonly string fileName;
public DocumentQLPreviewControllerDataSource(string fileName)
{
this.fileName = fileName;
}
public override nint PreviewItemCount(QLPreviewController controller)
{
return 1;
}
public override IQLPreviewItem GetPreviewItem(QLPreviewController controller, nint index)
{
NSUrl url = NSUrl.FromFilename(fileName);
return new QlItem(url);
}
private sealed class QlItem : QLPreviewItem
{
private readonly NSUrl itemUrl;
public QlItem(NSUrl uri)
{
itemUrl = uri;
}
public override string ItemTitle { get { return string.Empty; } }
public override NSUrl ItemUrl { get { return itemUrl; } }
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing)
{
this.itemUrl?.Dispose();
}
}
}
}
}
If the application setups the main page like below:
MainPage = new NavigationPage(new QuickLookIOS10TestPage());
it does work on iOS 9.3 but not on iOS 10. If I remove NavigationPage:
MainPage = new QuickLookIOS10TestPage();
it works on both iOS versions.
The code behind for button clicks just sets the FilePath property of the control.
Sample app demonstrating the problem
Xamarin Forms 2.3.2.127
Xamarin Studio 6.1.1 (build 15)
I've faced with the same problem. It looks like something was changed or even broken in QuickLook in iOS10, but the solution is quite simple:
public class PdfViewerControlRenderer : ViewRenderer<PdfViewerControl, UIView>
{
private readonly bool IsOniOS10;
private UIViewController _controller;
private QLPreviewController _qlPreviewController;
public PdfViewerControlRenderer()
{
IsOniOS10 = UIDevice.CurrentDevice.CheckSystemVersion(10, 0);
}
protected override void OnElementChanged(ElementChangedEventArgs<PdfViewerControl> e)
{
if (e.NewElement != null)
{
_controller = new UIViewController();
_qlPreviewController = new QLPreviewController();
//...
// Set QuickLook datasource here
//...
if (!IsOniOS10)
{
_controller.AddChildViewController(_qlPreviewController);
_controller.View.AddSubview(_qlPreviewController.View);
_qlPreviewController.DidMoveToParentViewController(_controller);
}
SetNativeControl(_controller.View);
}
}
public override void LayoutSubviews()
{
base.LayoutSubviews();
_controller.View.Frame = Bounds;
_controller.View.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
_qlPreviewController.View.Frame = Bounds;
if (IsOniOS10)
{
_controller.View.AddSubview(_qlPreviewController.View);
_qlPreviewController.DidMoveToParentViewController(_controller);
}
}
}
Result:

Android app - using AsyncTask - stops opening a URL in WebView, it is opened by the default browser if I call another URL

I'm beginning to develop in android using the material from http://developer.android.com.
I took one of their examples and modified it, so that my application can connect to a webpage. It works well when it is opened but if I click on an actionBar item which should open another page the new page isn't opened in the WebView, but it's launched the default browser.
I tried in many way to understand how to avoid that, but my little experience didn't allow me to fixe the problem.
Can you help me?
Many thanks.
Nino
public class MainActivity extends Activity {
public static final String WIFI = "Wi-Fi";
public static final String ANY = "Any";
public static String PAGINA ="http://www.kibao.org/simu/wap.php?lng=";
public static String BASE ="http://www.kibao.org";
public static String ATTUALE ="";
public static String lng = "";
final Context context = this;
private static boolean wifiConnected = false;
private static boolean mobileConnected = false;
public static boolean refreshDisplay = true;
public static String sPref = null;
public static String pagina = "";
private NetworkReceiver receiver = new NetworkReceiver();
#Override
public void onCreate(Bundle savedInstanceState) {
lng = getResources().getString(R.string.lng);
IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
receiver = new NetworkReceiver();
this.registerReceiver(receiver, filter);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
#Override
public void onStart() {
super.onStart();
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
sPref = sharedPrefs.getString("listPref", "Wi-Fi");
updateConnectedFlags();
if (refreshDisplay) {
ATTUALE=PAGINA.concat(lng);
loadPage(ATTUALE);
}
}
#Override
public void onDestroy() {
super.onStop();
String ciao = getResources().getString(R.string.ciao);
show_toast(ciao);
if (receiver != null) {
this.unregisterReceiver(receiver);
}
}
private void updateConnectedFlags() {
ConnectivityManager connMgr =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeInfo = connMgr.getActiveNetworkInfo();
if (activeInfo != null && activeInfo.isConnected()) {
wifiConnected = activeInfo.getType() == ConnectivityManager.TYPE_WIFI;
mobileConnected = activeInfo.getType() == ConnectivityManager.TYPE_MOBILE;
} else {
wifiConnected = false;
mobileConnected = false;
}
}
private void loadPage(String pgUrl) {
if (((sPref.equals(ANY)) && (wifiConnected || mobileConnected))
|| ((sPref.equals(WIFI)) && (wifiConnected))) {
new DownloadWebpageTask().execute(pgUrl);
} else {
showErrorPage();
}
}
// Displays an error if the app is unable to load content.
private void showErrorPage() {
....
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.items, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.menu1:
if (refreshDisplay) {
ATTUALE=BASE.concat("/partite.php?lng=");
ATTUALE=ATTUALE.concat(lng);
loadPage(ATTUALE);
}
return true;
....
default:
return super.onOptionsItemSelected(item);
}
}
private InputStream downloadUrl(String urlString) throws IOException {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
InputStream stream = conn.getInputStream();
return stream;
}
public class NetworkReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager connMgr =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (WIFI.equals(sPref) && networkInfo != null
&& networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
refreshDisplay = true;
Toast.makeText(context, R.string.wifi_connected, Toast.LENGTH_SHORT).show();
} else if (ANY.equals(sPref) && networkInfo != null) {
refreshDisplay = true;
} else {
refreshDisplay = false;
Toast.makeText(context, R.string.lost_connection, Toast.LENGTH_SHORT).show();
}
}
}
private class DownloadWebpageTask extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... urls) {
try {
return loadWebpageFromNetwork(urls[0]);
} catch (IOException e) {
return getResources().getString(R.string.connection_error);
}
}
#Override
protected void onPostExecute(String result) {
setContentView(R.layout.main);
WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.loadUrl(ATTUALE);
}
}
private String loadWebpageFromNetwork(String urlString) throws IOException {
InputStream stream = null;
try {
stream = downloadUrl(urlString);
pagina = getStringFromInputStream(stream);
} finally {
if (stream != null) {
stream.close();
}
}
return pagina;
}
private static String getStringFromInputStream(InputStream is) {
BufferedReader br = null;
StringBuilder sb = new StringBuilder();
String line;
try {
br = new BufferedReader(new InputStreamReader(is));
while ((line = br.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
........
}
This DownloadWebpageTask tries to "download" a webpage into a string, using a webview. This is not the correct way to do it. You are using the wrong tutorial. Don't use AsyncTasks for this. Start all over, using this:
http://developer.android.com/reference/android/webkit/WebView.html
or
http://www.mkyong.com/android/android-webview-example/
Simply call webview.loadUrl(url) again with a different url if you want to load a different page. It's as simple as that.
I've found another solution that works. I added the line
myWebView.setWebViewClient(new WebViewClient());
in the onPostExecute:
protected void onPostExecute(String result) {
setContentView(R.layout.main);
WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new WebViewClient());
myWebView.loadUrl(ATTUALE);
}
Thanks, Frank.
PS I've tried to add a comment to the last Frank's post, but I didn't succeed!

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