I need to display the images from remote database.here I have a code to display images from local file.But I can't get it from remote server
C# code
DispatcherTimer timer = new DispatcherTimer();
List<string> files = new List<string>() { "http://technomindtech.com/1tele-pixel.com/ad/banner.jpg", "http://technomindtech.com/1tele-pixel.com/ad/logo_banner.jpg", "http://technomindtech.com/1tele-pixel.com/ad/images.jpeg" };
List<BitmapImage> images = new List<BitmapImage>();
int current = 0;
foreach (string file in files)
{
BitmapImage image = new BitmapImage(new Uri(file, UriKind.Relative));
images.Add(image);
}
timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(3);
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
void timer_Tick(object sender, EventArgs e)
{
Image1.Source = images[current];
current++;
if (current >= files.Count)
current = 0;
}
Xaml code
<Image x:Name="Image1" Stretch="Fill" Width="410" Grid.ColumnSpan="3" Margin="-8,0,-29,0" />
but it throws Uri exception it can't show the image
In your foreach block, when creating an image from the Uri, you are stating that the path is relative, but it is actually absolute. So, modifying the statement should work:
BitmapImage image = new BitmapImage(new Uri(file, UriKind.Absolute));
Related
Hello am new to Android studio
I have made recylerview for transaction details . I need to create pdf for this recylerview items.
Example: I have 24 cardviews in recylerview so need to create pdf with each page 4 cardviews only . So totally I need to get pdf as 6 pages .
How to do that . Thanks in advance.
This is sample image of my view
Am passing below code
recyclerView.measure(View.MeasureSpec.makeMeasureSpec(recyclerView.getWidth(),View.MeasureSpec.EXACTLY),View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED));
Bitmap bm=Bitmap.createBitmap(recyclerView.getWidth(),recyclerView.getMeasuredHeight(),Bitmap.Config.ARGB_8888);
String mpath2="/mnt/sdcard/mathanpaymentpdf";
File imageFile = new File(mpath2);
PDFHelper pdfHelper = new PDFHelper(imageFile,this);
pdfHelper.saveImageToPDF(recyclerView,bm,"mathan"+System.currentTimeMillis());
public class PDFHelper {
private File mFolder;
private File mFile;
private Context mContext;
public PDFHelper(File folder, Context context) {
this.mContext = context;
this.mFolder = folder;
if(!mFolder.exists())
mFolder.mkdirs();
}
public void saveImageToPDF(View title, Bitmap bitmap, String filename) {
mFile = new File(mFolder, filename + ".pdf");
if (!mFile.exists()) {
int height = title.getHeight() + bitmap.getHeight();
PdfDocument document = new PdfDocument();
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(bitmap.getWidth(), height, 1).create();
PdfDocument.Page page = document.startPage(pageInfo);
Canvas canvas = page.getCanvas();
title.draw(canvas);
canvas.drawBitmap(bitmap, null, new Rect(0, title.getHeight(), bitmap.getWidth(),bitmap.getHeight()), null);
document.finishPage(page);
try {
mFile.createNewFile();
OutputStream out = new FileOutputStream(mFile);
document.writeTo(out);
document.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
This am tried am getting pdf on a single page only
Just I need to split into multiple pages.
Note: I need code in java, not in kotlin
Am solved this by using itext library
implementation 'com.itextpdf:itextpdf:5.0.6'
Then call with RecylerView
public void generatePDF(RecyclerView view) {
RecyclerView.Adapter adapter = view.getAdapter();
int sie2=adapter.getItemCount();
if (sie2 == 0) {
Toast.makeText(this,"No Transactions",Toast.LENGTH_LONG).show();
}else{
Bitmap bigBitmap = null;
if (adapter != null) {
int size = adapter.getItemCount();
int height = 0;
Paint paint = new Paint();
int iHeight = 0;
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
// Use 1/8th of the available memory for this memory cache.
final int cacheSize = maxMemory / 8;
LruCache<String, Bitmap> bitmaCache = new LruCache<>(cacheSize);
for (int i = 0; i < size; i++) {
RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i));
adapter.onBindViewHolder(holder, i);
holder.itemView.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(), holder.itemView.getMeasuredHeight());
holder.itemView.setDrawingCacheEnabled(true);
holder.itemView.buildDrawingCache();
Bitmap drawingCache = holder.itemView.getDrawingCache();
if (drawingCache != null) {
bitmaCache.put(String.valueOf(i), drawingCache);
}
height += holder.itemView.getMeasuredHeight();
}
bigBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), height, Bitmap.Config.ARGB_8888);
Canvas bigCanvas = new Canvas(bigBitmap);
bigCanvas.drawColor(Color.WHITE);
Document document=new Document();
final File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS), "MAT"+System.currentTimeMillis()+".pdf");
try {
PdfWriter.getInstance(document, new FileOutputStream(file));
} catch (DocumentException | FileNotFoundException e) {
e.printStackTrace();
}
for (int i = 0; i < size; i++) {
try {
//Adding the content to the document
Bitmap bmp = bitmaCache.get(String.valueOf(i));
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
com.itextpdf.text.Image image= com.itextpdf.text.Image.getInstance(stream.toByteArray());
//Image image = Image.getInstance(stream.toByteArray());
float scaler = ((document.getPageSize().getWidth() - document.leftMargin()
- document.rightMargin() - 50) / image.getWidth()) * 100; // 0 means you have no indentation. If you have any, change it.
image.scalePercent(scaler);
image.setAlignment(com.itextpdf.text.Image.ALIGN_CENTER | com.itextpdf.text.Image.ALIGN_TOP);
if (!document.isOpen()) {
document.open();
}
document.add(image);
} catch (Exception ex) {
Log.e("TAG-ORDER PRINT ERROR", ex.getMessage());
}
}
if (document.isOpen()) {
document.close();
}
// Set on UI Thread
runOnUiThread(new Runnable() {
#Override
public void run() {
android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(MainActivityAdminMain.this);
builder.setTitle("Success")
.setMessage("PDF File Generated Successfully.")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton("Open", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// dialog.dismiss();
Intent target = new Intent(Intent.ACTION_VIEW);
target.setDataAndType(Uri.fromFile(file), "application/pdf");
target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
Intent intent56 = Intent.createChooser(target, "Open File");
try {
startActivity(intent56);
} catch (ActivityNotFoundException e) {
Toast.makeText(MainActivityAdminMain.this,"No PDF Viewer Installed.",Toast.LENGTH_LONG).show();
}
}
}).show();
}
});
}}
}
100% working.. This helps to anyone needs
I am using below code in asp.net webapi for audio streaming to allow android application to call api and play songs.
public class AudioController : ApiController
{
ITrackRepository _TrackRepo = new TrackRepository();
public AudioController()
{
}
public HttpResponseMessage Get(int id)
{
var trackd = _TrackRepo.GetPlayfilepath(id);
string filename = System.Web.HttpContext.Current.Server.MapPath(trackd.Select(x => x.FilePath).FirstOrDefault());
var audio = new AudioStream(filename);
string fileExtension = System.IO.Path.GetExtension(filename);
var response = Request.CreateResponse();
response.Content = new PushStreamContent(audio.WriteToStream, new MediaTypeHeaderValue("audio/" + fileExtension));
return response;
}
}
public class AudioStream
{
private readonly string _filename;
public AudioStream(string filename)
{
_filename = filename;
}
public async void WriteToStream(Stream outputStream, HttpContent content, TransportContext context)
{
try
{
var buffer = new byte[65536];
using (var video = File.Open(_filename, FileMode.Open, FileAccess.Read))
{
var length = (int)video.Length;
var bytesRead = 1;
while (length > 0 && bytesRead > 0)
{
bytesRead = video.Read(buffer, 0, Math.Min(length, buffer.Length));
await outputStream.WriteAsync(buffer, 0, bytesRead);
length -= bytesRead;
}
}
}
catch (HttpException ex)
{
return;
}
finally
{
outputStream.Close();
}
}
}
I am able to play song, i tested it with vlc (stream) and its working fine, Issue is when i try to play same song in parallel in another player its giving me below error
The process cannot access the file because it is being used by another
process.
I completely understand error, but i am not able to find any satisfactory solution.
one solution is to create a copy of song before play/stream and delete it on completion but i don't think that is a good solution.
please suggest.
I'm not at a computer with visual studio on it at the moment, but look at this overload for File.Open
Try changing this line:
using (var video = File.Open(_filename, FileMode.Open, FileAccess.Read))
to
using (var video = File.Open(_filename, FileMode.Open, FileAccess.Read, FileShare.Read))
See if that helps.
I am creating a project in which I want to compress image so that it can be uploaded easily on windows azure and later can be retrieved easily from windows azure to my application.So can you please help me with how can I do that. I am using BitmapImage right now . Follwoing is the code which I am using to upload image to azure
void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(e.ChosenPhoto);
WriteableBitmap wb = new WriteableBitmap(bitmap);
using (MemoryStream stream = new MemoryStream())
{
wb.SaveJpeg(stream, wb.PixelWidth, wb.PixelHeight, 0, 0);
AzureStorage storage = new AzureStorage();
storage.Account = **azure account**;
storage.BlobEndPoint = **azure end point**;
storage.Key = **azure key**;
string fileName = uid;
bool error = false;
if (!error)
{
storage.PutBlob("workerimages", fileName, imageBytes, error);
}
else
{
MessageBox.Show("Error uploading the new image.");
}
}
}
}
Be care using the WriteableBitmap as you may run out of memory if resizing a lot of images. If you only have a few, then pass the size you want saved to the SaveJpeg method. Also make sure you use a value higher than 0 for the quality (last param of SaveJpeg)
var width = wb.PixelWidth/4;
var height = wb.PixelHeight/4;
using (MemoryStream stream = new MemoryStream())
{
wb.SaveJpeg(stream, width, height, 0, 100);
...
...
}
You can also use the JpegRenderer from the Nokia Imaging SDK to resize an image.
var width = wb.PixelWidth/4;
var height = wb.PixelHeight/4;
using (var imageProvider = new StreamImageSource(e.ChosenPhoto))
{
IFilterEffect effect = new FilterEffect(imageProvider);
// Get the resize dimensions
Windows.Foundation.Size desiredSize = new Windows.Foundation.Size(width, height);
using (var renderer = new JpegRenderer(effect))
{
renderer.OutputOption = OutputOption.PreserveAspectRatio;
// set the new size of the image
renderer.Size = desiredSize;
IBuffer buffer = await renderer.RenderAsync();
return buffer;
}
}
I'm having a Windows 8 app which is working pretty well and now I want to write the same app for Windows Phone 8, but I'm only getting a black image and not the right image.
This is my code for uploading the image file
if ((_fileType == ".jpg" || _fileType == ".png" || _fileType == ".jpeg") && _fileSize < 3500000)
{
byte[] myPicArray = ConvertToBytes(_bmpFile);
HttpClient httpClient = new HttpClient();
httpClient.BaseAddress = new Uri(MYURI);
MultipartFormDataContent form = new MultipartFormDataContent();
HttpContent content = new ByteArrayContent(myPicArray);
form.Add(content, "media", _randomStringFileName + _fileType);
HttpResponseMessage response = await httpClient.PostAsync("upload.php", form);
}
and this is the code for converting my image to a byte array
private byte[] ConvertToBytes(BitmapImage bitmapImage)
{
using (MemoryStream ms = new MemoryStream())
{
WriteableBitmap btmMap = new WriteableBitmap
(bitmapImage.PixelWidth, bitmapImage.PixelHeight);
// write an image into the stream
Extensions.SaveJpeg(btmMap, ms,
bitmapImage.PixelWidth, bitmapImage.PixelHeight, 0, 100);
return ms.ToArray();
}
}
Has anybody an idea why I'm only getting a black image and not the right image? The image was selected by the PhotoChooseTask.
The PhotoChooseTask already gives you the Stream, so you'll just need to use that instead (You can't use the BitMap yet because it's still busy writing it to the device and generating thumbnails, etc)
PhotoResult photoResult = e as PhotoResult;
MemoryStream memoryStream = new MemoryStream();
photoResult.ChosenPhoto.CopyTo(memoryStream);
byte[] myPicArray = memoryStream.ToArray();
On button click event or on Link button click, I want to download document from sharepoint document library and save it to the user's local disk.
Plz help me on this,If you have any code sample then please share
The problem with outputting a direct link to the file, is that for some content types it may just open in the browser window. If that is not the desired outcome, and you want to force the save file dialog, you'll need to write an ASP/PHP page that you could pass a filename to via the querystring. This page could then read the file and set some headers on the response to indicate that the content-disposition is and attachment.
For ASP.net, if you create a simple aspx page called download.aspx, add the following code into it, then put this file on a server somewhere you can download files by calling this page like this:
http://yourserveraddress/download.aspx?path=http://yoursharepointserver/pathtodoclibrary/file.ext
protected void Page_Load(object sender, EventArgs e)
{
string path = "";
string fileName = "";
path = Request.QueryString["path"];
if (path != null && path.Length > 0)
{
int lastIndex = path.LastIndexOf("/");
fileName = path.Substring(lastIndex + 1, (path.Length - lastIndex - 1));
byte[] data;
data = GetDataFromURL(path);
Response.Clear();
Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);
Response.BinaryWrite(data);
Response.Flush();
}
}
protected byte[] GetDataFromURL(string url)
{
WebRequest request = WebRequest.Create(url);
byte[] result;
byte[] buffer = new byte[4096];
//uncomment this line if you need to be authenticated to get to the files on SP
//request.Credentials = new NetworkCredential("username", "password", "domain");
using (WebResponse response = request.GetResponse())
{
using (Stream responseStream = response.GetResponseStream())
{
using (MemoryStream ms = new MemoryStream())
{
int count = 0;
do
{
count = responseStream.Read(buffer, 0, buffer.Length);
ms.Write(buffer, 0, count);
} while (count != 0);
result = ms.ToArray();
}
}
}
return result;
}
I'd create a LinkButton and set the URL to the document's url programmatically.