I have a problem of client doesn't connect to the server. They are on the same port. I have the right IP address. I wrote a similar program in C# and it connects.
How can I solve it?
I have an Entry called "IpAd", where I write the IP address
private void Connect_Clicked(object sender, EventArgs e)
{
string[] ip = new string[3];
ip = IpAd.Text.Split('.');
for (int i = 0; i<=3;i++)
{
if (int.Parse(ip[i]) > 255 || int.Parse(ip[i]) < 0 || IpAd.Text == "")
{
Connected.Text = "Incorrect Ip";
Connected.TextColor = Color.Red;
return;
}
}
try
{
_sender = new TcpClient(IpAd.Text.ToString(), 11000);
Connected.Text = "Client Online";
Connected.TextColor = Color.Green;
stream = _sender.GetStream();
Connected.Text = "Connected";
Connected.TextColor = Color.Green;
Can_send = true;
}
catch (SocketException ee)
{
Console.WriteLine("SocketException: {0}", ee);
Connected.Text = "Socket Not Connected";
Connected.TextColor = Color.Red;
}
catch
{
Connected.Text = "Not Connected";
Connected.TextColor = Color.Red;
}
}
Related
I am facing this exception "Impossible to send packets" when i am pinging www.google.com in my windows mobile app code (.netcf c#). But, pinging with localhost(127.0.0.1) gives the success result.
How to get resolve from this problem?
Here is my code..
public bool PingTest()
{
int packet=32;
IPHostEntry hostEnt = Dns.GetHostEntry("www.google.com");
IPAddress ip = hostEnt.AddressList[0];
PingOptions options = new PingOptions();
options.Ttl = 128;
options.DontFragment = false;
//Debug.WriteLine("Ip address: " + ip.Address);
Byte[] pkt= new Byte[packet];
Ping ping = new Ping();
try
{
//const string adr = "216.58.197.78";
PingReply pingReply = ping.Send(ip, pkt, 1000, options);
if (pingReply.Status == IPStatus.Success)
{
return true;
}
else
{
return false;
}
}
catch (Exception ex)
{
Debug.WriteLine("The UnHandled Exception is: " + ex.Message);
return false;
}
}
I have an forms app where i need to pick "1 to many" images from the phone storage.
For this i use the dependency injection system.
My problem is the somewhere i get an Android.netUri that resolves to a file that do not exist... and to a file name that i have never seen before.
The kicker is that if i pick pictures that was takes within the last couple of hours this code works...
Im am at the end of my hoap, i really hope someone can point me to something that i'm doing wrong.
i start the Picker activity with:
[assembly: Dependency(typeof(ImagePickerService))]
namespace MyApp.Droid
{
public class ImagePickerService : Java.Lang.Object, IImagePickerService
{
public async Task OpenGallery()
{
try
{
var status = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Storage);
if (status != PermissionStatus.Granted)
{
if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Storage))
{
Toast.MakeText(CrossCurrentActivity.Current.Activity, "Need Storage permission to access to your photos.", ToastLength.Long).Show();
}
var results = await CrossPermissions.Current.RequestPermissionsAsync(new[] { Permission.Storage });
status = results[Permission.Storage];
}
if (status == PermissionStatus.Granted)
{
Toast.MakeText(CrossCurrentActivity.Current.Activity, "Pick max 20 images", ToastLength.Long).Show();
var imageIntent = new Intent(Intent.ActionPick);
imageIntent.SetType("image/*");
imageIntent.PutExtra(Intent.ExtraAllowMultiple, true);
imageIntent.SetAction(Intent.ActionPick);
CrossCurrentActivity.Current.Activity.StartActivityForResult(Intent.CreateChooser(imageIntent, "Pick pictures"), 100);
}
else if (status != PermissionStatus.Unknown)
{
Toast.MakeText(CrossCurrentActivity.Current.Activity, "Permission Denied. Can not continue, try again.", ToastLength.Long).Show();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
Toast.MakeText(CrossCurrentActivity.Current.Activity, "Error. Can not continue, try again.", ToastLength.Long).Show();
}
}
}
then in my MainActivity.cs i have the OnActivityResult
I have tried to use the ContentResolver.OpenInputStream to get the image bytes with no luck, so this is commented out atm.
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
if (requestCode == OPENGALLERYCODE && resultCode == Result.Ok)
{
List<string> images = new List<string>();
if (data != null)
{
ClipData clipData = data.ClipData;
if (clipData != null)
{
for (int i = 0; i < clipData.ItemCount; i++)
{
ClipData.Item item = clipData.GetItemAt(i);
/*
var stream = ContentResolver.OpenInputStream(item.Uri); //This throws "FileNotFound"
byte[] byteArray;
using (var memoryStream = new MemoryStream())
{
stream.CopyTo(memoryStream);
byteArray = memoryStream.ToArray();
stream.Close();
stream = null;
}
stream = ContentResolver.OpenInputStream(item.Uri);
var exif = new ExifInterface(stream);
stream.Close();
*/
Android.Net.Uri uri = item.Uri;
var path = GetActualPathFromFile(uri);
if (path != null)
{
var tmpImgPath = RotateToOriginalDimention(path);
images.Add(tmpImgPath);
}
}
}
else
{
Android.Net.Uri uri = data.Data;
var path = GetActualPathFromFile(uri);
if (path != null)
{
var tmpImgPath = RotateToOriginalDimention(path);
images.Add(tmpImgPath);
}
}
MessagingCenter.Send<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelected", images);
}
}
}
And the GetActualPathFromFile (also in my MainActivity.cs)
The hole func is below but i hit this part of the code and get at "FileNotFound"
(...)
else if ("content".Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
{
var retval2 = getDataColumn(this, uri, null, null);
if (File.Exists(retval2)) //<----------------------- This returns "false"
{
return retval2;
}
else
{
throw new Exception("file not found " + retval2);
}
}
(...)
The Hole GetActualPathFromFile
private string GetActualPathFromFile(Android.Net.Uri uri)
{
bool isKitKat = Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Kitkat;
if (isKitKat && DocumentsContract.IsDocumentUri(this, uri))
{
// ExternalStorageProvider
if (isExternalStorageDocument(uri))
{
string docId = DocumentsContract.GetDocumentId(uri);
char[] chars = { ':' };
string[] split = docId.Split(chars);
string type = split[0];
if ("primary".Equals(type, StringComparison.OrdinalIgnoreCase))
{
var retval = Android.OS.Environment.ExternalStorageDirectory + "/" + split[1];
if (File.Exists(retval))
{
return retval;
}
else
{
throw new Exception("file not found " + retval);
}
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri))
{
string id = DocumentsContract.GetDocumentId(uri);
Android.Net.Uri contentUri = ContentUris.WithAppendedId(
Android.Net.Uri.Parse("content://downloads/public_downloads"), long.Parse(id));
//System.Diagnostics.Debug.WriteLine(contentUri.ToString());
var retval = getDataColumn(this, contentUri, null, null);
if (File.Exists(retval))
{
return retval;
}
else
{
throw new Exception("file not found " + retval);
}
}
// MediaProvider
else if (isMediaDocument(uri))
{
String docId = DocumentsContract.GetDocumentId(uri);
char[] chars = { ':' };
String[] split = docId.Split(chars);
String type = split[0];
Android.Net.Uri contentUri = null;
if ("image".Equals(type))
{
contentUri = MediaStore.Images.Media.ExternalContentUri;
}
else if ("video".Equals(type))
{
contentUri = MediaStore.Video.Media.ExternalContentUri;
}
else if ("audio".Equals(type))
{
contentUri = MediaStore.Audio.Media.ExternalContentUri;
}
String selection = "_id=?";
String[] selectionArgs = new String[]
{
split[1]
};
var retval = getDataColumn(this, contentUri, selection, selectionArgs);
if (File.Exists(retval))
{
return retval;
}
else
{
throw new Exception("file not found " + retval);
}
}
}
// MediaStore (and general)
else if ("content".Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
{
// Return the remote address
if (isGooglePhotosUri(uri))
{
var retval = uri.LastPathSegment;
if (File.Exists(retval))
{
return retval;
}
else
{
throw new Exception("file not found " + retval);
}
}
var retval2 = getDataColumn(this, uri, null, null);
if (File.Exists(retval2))
{
return retval2;
}
else
{
throw new Exception("file not found " + retval2);
}
}
// File
else if ("file".Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
{
var retval = uri.Path;
if (File.Exists(retval))
{
return retval;
}
else
{
throw new Exception("file not found " + retval);
}
}
throw new Exception("file not found ");
}
public static String getDataColumn(Context context, Android.Net.Uri uri, String selection, String[] selectionArgs)
{
ICursor cursor = null;
String column = "_data";
String[] projection =
{
column
};
try
{
cursor = context.ContentResolver.Query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.MoveToFirst())
{
int index = cursor.GetColumnIndexOrThrow(column);
return cursor.GetString(index);
}
}
finally
{
if (cursor != null)
cursor.Close();
}
return null;
}
//Whether the Uri authority is ExternalStorageProvider.
public static bool isExternalStorageDocument(Android.Net.Uri uri)
{
return "com.android.externalstorage.documents".Equals(uri.Authority);
}
//Whether the Uri authority is DownloadsProvider.
public static bool isDownloadsDocument(Android.Net.Uri uri)
{
return "com.android.providers.downloads.documents".Equals(uri.Authority);
}
//Whether the Uri authority is MediaProvider.
public static bool isMediaDocument(Android.Net.Uri uri)
{
return "com.android.providers.media.documents".Equals(uri.Authority);
}
//Whether the Uri authority is Google Photos.
public static bool isGooglePhotosUri(Android.Net.Uri uri)
{
return "com.google.android.apps.photos.content".Equals(uri.Authority);
}
Found out that the real problem was that Google Photos App was not updating and was still showing images that were deleted.
After 2x reboot of the phone, Google Photos app finally updated.
So this looks more like a cache problem with Google Foto than a xamarin problem.
This is driving me crazy. I wrote a code quite a while ago that was working, and opened it again and it happens that I am not able to transfer my assets from the mobile to the wearable device.
public Bitmap loadBitmapFromAsset(Asset asset) {
if (asset == null) {
throw new IllegalArgumentException("Asset must be non-null");
}
// convert asset into a file descriptor and block until it's ready
Log.d(TAG, "api client" + mApiClient);
DataApi.GetFdForAssetResult result = Wearable.DataApi.getFdForAsset(mApiClient, asset).await();
if (result == null) {
Log.w(TAG, "getFdForAsset returned null");
return null;
}
if (result.getStatus().isSuccess()) {
Log.d(TAG, "success");
} else {
Log.d(TAG, result.getStatus().getStatusCode() + ":" + result.getStatus().getStatusMessage());
}
InputStream assetInputStream = result.getInputStream();
if (assetInputStream == null) {
Log.w(TAG, "Requested an unknown Asset.");
return null;
}
// decode the stream into a bitmap
return BitmapFactory.decodeStream(assetInputStream);
}
And this is the code from which I call the loadBitmapFrom Asset method.
DataMap dataMap = DataMapItem.fromDataItem(event.getDataItem()).getDataMap();
ArrayList<DataMap> dataMaps = dataMap.getDataMapArrayList("dataMaps");
ArrayList<String> names = new ArrayList<>();
ArrayList<String> permalinks = new ArrayList<>();
ArrayList<Asset> images = new ArrayList<>();
for (int i = 0 ; i < dataMaps.size() ; i++) {
Log.d(TAG, dataMaps.get(i).getString("name"));
names.add(dataMaps.get(i).getString("name"));
permalinks.add(dataMaps.get(i).getString("permalink"));
images.add(dataMaps.get(i).getAsset("image"));
}
editor.putInt("my_selection_size", names.size());
for (int i=0; i <names.size() ; i++) {
editor.putString("my_selection_name_" + i, names.get(i));
editor.putString("my_selection_permalink_" + i, permalinks.get(i));
Log.d(TAG, "asset number " + i + " " + images.get(i));
Bitmap bitmap = loadBitmapFromAsset(images.get(i));
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
editor.putString("my_selection_image_" + i, encoded);
}
And on the mobile side :
private void sendData(PutDataMapRequest dataMap) {
PutDataRequest request = dataMap.asPutDataRequest();
request.setUrgent();
com.google.android.gms.common.api.PendingResult<DataApi.DataItemResult> pendingResult = Wearable.DataApi.putDataItem(mApiClient, request);
pendingResult.setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
#Override
public void onResult(DataApi.DataItemResult dataItemResult) {
com.orange.radio.horizon.tools.Log.d(TAG, "api client : " + mApiClient);
if (dataItemResult.getStatus().isSuccess()) {
com.orange.radio.horizon.tools.Log.d(TAG, "message successfully sent");
} else if (dataItemResult.getStatus().isInterrupted()) {
com.orange.radio.horizon.tools.Log.e(TAG, "couldn't send data to watch (interrupted)");
} else if (dataItemResult.getStatus().isCanceled()) {
com.orange.radio.horizon.tools.Log.e(TAG, "couldn't send data to watch (canceled)");
}
}
});
Log.d(TAG, "Sending data to android wear");
}
class ConfigTask extends AsyncTask<String, Void, String> {
ArrayList<WatchData> mitems;
int mType;
public ConfigTask(ArrayList<WatchData> items, int type)
{
mitems = items;
mType = type;
}
protected String doInBackground(String... str)
{
DataMap dataMap;
ArrayList<DataMap> dataMaps = new ArrayList<>();
Bitmap bitmap = null;
for (int i = 0 ; i < mitems.size() ; i++) {
dataMap = new DataMap();
URL url = null;
try {
url = new URL(mitems.get(i).mUrlSmallLogo);
Log.d(TAG, "url : " + url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch (IOException e) {
e.printStackTrace();
}
Asset asset = createAssetFromBitmap(bitmap);
dataMap.putAsset("image", asset);
dataMap.putString("name", mitems.get(i).mName);
dataMap.putString("permalink", mitems.get(i).mPermalink);
dataMaps.add(dataMap);
}
PutDataMapRequest request = null;
switch (mType) {
case 0 :
request = PutDataMapRequest.create(SELECTION_PATH);
break;
case 1 :
request = PutDataMapRequest.create(RADIOS_PATH);
break;
case 2 :
request = PutDataMapRequest.create(PODCASTS_PATH);
break;
}
request.getDataMap().putDataMapArrayList("dataMaps", dataMaps);
request.getDataMap().putString("", "" + System.currentTimeMillis()); //random data to refresh
Log.d(TAG, "last bitmap : " + bitmap);
Log.d(TAG, "===============================SENDING THE DATAMAP ARRAYLIST==================================");
sendData(request);
return "h";
}
protected void onPostExecute(String name)
{
}
}
When executing that code, I see the following error happening :
02-02 14:47:59.586 7585-7601/? D/WearMessageListenerService﹕ 4005:ASSET_UNAVAILABLE
I saw that related thread Why does Wearable.DataApi.getFdForAsset produce a result with status 4005 (Asset Unavailable)? but it didn't really help me
I recently had the same problem... I solved it by updating the Google play service, and adding the same signing configuration to both the app and the wearable module. If it doesn't work on the first build go to "invalidate caches / restart" in files and it should work.
In my app I need to download several images from a server. I use this code to get a byte array :
HttpConnection connection = null;
InputStream inputStream = null;
byte[] data = null;
try
{
//connection = (HttpConnection)Connector.open(url);
connection = (HttpConnection)Connector.open(url, Connector.READ_WRITE, true);
int responseCode = connection.getResponseCode();
if(responseCode == HttpConnection.HTTP_OK)
{
inputStream = connection.openInputStream();
data = IOUtilities.streamToBytes(inputStream);
inputStream.close();
}
connection.close();
return data;
}
catch(IOException e)
{
return null;
}
The url are formed with the suffix ";deviceSide=false;ConnectionType=MDS - public" (without spaces) and it is working perfectly well.
The problem is that with phones that do not have a sim card, we can't connect to the internet via the MDS server. So we changed to use the connection factory and let BB choose whatever he wants :
ConnectionFactory connFact = new ConnectionFactory();
ConnectionDescriptor connDesc;
connDesc = connFact.getConnection(url);
if (connDesc != null)
{
final HttpConnection httpConn;
httpConn = (HttpConnection)connDesc.getConnection();
try
{
httpConn.setRequestMethod(HttpConnection.GET);
final int iResponseCode = httpConn.getResponseCode();
if(iResponseCode == HttpConnection.HTTP_OK)
{
InputStream inputStream = null;
try{
inputStream = httpConn.openInputStream();
byte[] data = IOUtilities.streamToBytes(inputStream);
return data;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
finally{
try
{
inputStream.close();
} catch (IOException e)
{
e.printStackTrace();
return null;
}
}
}
}
catch (IOException e)
{
System.err.println("Caught IOException: " + e.getMessage());
}
}
return null;
The connection works because it select the good prefix (interface=wifi in our case), but this create another problem.
Some images are not well downloaded, some of them (not the sames at each try) are corrupted, but only when the phone use a wifi connection to get these images.
How can I avoid this problem ? What method to get a connection do I have to use ? Is it possible to check if the user have a sim card in orderto use MDS - public ?
Here is an example of a corrupted image :
error image http://nsa30.casimages.com/img/2012/06/28/120628033716123822.png
try this:
public static String buildURL(String url) {
String connParams = "";
if (WLANInfo.getWLANState() == WLANInfo.WLAN_STATE_CONNECTED) {
connParams = ";interface=wifi"; //Connected to a WiFi access point.
} else {
int coverageStatus = CoverageInfo.getCoverageStatus();
//
if ((coverageStatus & CoverageInfo.COVERAGE_BIS_B) == CoverageInfo.COVERAGE_BIS_B) {
connParams = ";deviceside=false;ConnectionType=mds-public";
} else if ((coverageStatus & CoverageInfo.COVERAGE_DIRECT) == CoverageInfo.COVERAGE_DIRECT) {
// Have network coverage and a WAP 2.0 service book record
ServiceRecord record = getWAP2ServiceRecord();
//
if (record != null) {
connParams = ";deviceside=true;ConnectionUID=" + record.getUid();
} else {
connParams = ";deviceside=true";
}
} else if ((coverageStatus & CoverageInfo.COVERAGE_MDS) == CoverageInfo.COVERAGE_MDS) {
// Have an MDS service book and network coverage
connParams = ";deviceside=false";
}
}
Log.d("connection param"+url+connParams);
//
return url+connParams;
}
private static ServiceRecord getWAP2ServiceRecord() {
String cid;
String uid;
ServiceBook sb = ServiceBook.getSB();
ServiceRecord[] records = sb.getRecords();
//
for (int i = records.length -1; i >= 0; i--) {
cid = records[i].getCid().toLowerCase();
uid = records[i].getUid().toLowerCase();
//
if (cid.indexOf("wptcp") != -1
&& records[i].getUid().toLowerCase().indexOf("wap2") !=-1
&& uid.indexOf("wifi") == -1
&& uid.indexOf("mms") == -1) {
return records[i];
}
}
//
return null;
}
What happens when you append interface=wifi? Can you run the network diagnostic tool attached to below kb article and run all tests with SIM removed
http://supportforums.blackberry.com/t5/Java-Development/What-Is-Network-API-alternative-for-legacy-OS/ta-p/614822
Please also note that when download large files over BES/MDS there are limits imposed by MDS. Please ensure you review the below kb article
http://supportforums.blackberry.com/t5/Java-Development/Download-large-files-using-the-BlackBerry-Mobile-Data-System/ta-p/44585
You can check to see if coverage is sufficient for BIS_B (MDS public) but that won't help you if you are trying to support SIM-less users. I wonder if the problem is in an incomparability between the connection on Wi-Fi and IOUtilities.streamToBytes(). Try coding as recommended in the API documents.
I did appreciate your help for my previous question , and i was wondering how to read data from an URI,using web service(let's assume it's the same data).
Here's the url link:
http://www.google.com/ig/api?weather=paris
I tryied with this code but it didn't work:
public MainPage()
{
InitializeComponent();
WebClient wc = new WebClient();
wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(download_string_complete);
wc.DownloadStringAsync(new Uri("http://www.google.com/ig/api?weather=hammamet", UriKind.Absolute));
}
public void download_string_complete(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
ListBoxItem areaItem = null;
StringReader stream = new StringReader(e.Result);
XmlReader reader = XmlReader.Create(stream);
string day = String.Empty;
string low = String.Empty;
string high = String.Empty;
string condition = String.Empty;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (reader.Name=="forecast_conditions")
{
WeatherElement welement = new WeatherElement();
switch (reader.Name)
{
case ("day_of_week"):
{
day = reader.ReadElementContentAsString();
areaItem = new ListBoxItem();
areaItem.Content = day;
friendsBox.Items.Add(day);
} break;
case ("low"):
{
low = reader.ReadElementContentAsString();
areaItem = new ListBoxItem();
areaItem.Content = low;
friendsBox.Items.Add(low);
} break;
case ("high"):
{
high = reader.ReadElementContentAsString();
areaItem = new ListBoxItem();
areaItem.Content = high;
friendsBox.Items.Add(high);
} break;
case ("condition"):
{
condition = reader.ReadElementContentAsString();
areaItem = new ListBoxItem();
areaItem.Content = condition;
friendsBox.Items.Add(condition);
} break;
}
}
}
}
}
}
void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
StringReader stream = new StringReader(e.Result);
XmlReader reader = XmlReader.Create(stream);
string Day = String.Empty;
string Low = String.Empty;
string High = String.Empty;
string ImageUri = String.Empty;
string Condition = String.Empty;
reader.MoveToContent();
while (reader.Read())
{
switch (reader.Name)
{
case ("day_of_week"):
{
listBox1.Items.Add(new ListBoxItem()
{
Content = reader.GetAttribute("data")
});
Day = Content.ToString();
} break;
case ("low"):
{
listBox1.Items.Add(new ListBoxItem()
{
Content = reader.GetAttribute("data")
});
Low = Content.ToString();
} break;
case ("high"):
{
listBox1.Items.Add(new ListBoxItem()
{
Content = reader.GetAttribute("data")
});
High = Content.ToString();
} break;
case ("icon"):
{
listBox1.Items.Add(new ListBoxItem()
{
Content = reader.GetAttribute("data")
});
Image wkpinImage = new Image();
wkpinImage.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("http://www.google.com" + Content, UriKind.Absolute));
wkpinImage.Opacity = 0.8;
wkpinImage.Stretch = System.Windows.Media.Stretch.None;
} break;
case ("condition"):
{
listBox1.Items.Add(new ListBoxItem()
{
Content = reader.GetAttribute("data")
});
Condition = Content.ToString();
} break;
case("weather"):
break;
}
}
reader.Close();
}
}