My requirement is pick video from gallery less than 25MB and show in my layout in android App.
Please try the below line of code to get the every video limit
String[] projection = new String[] {
MediaStore.Video.Media._ID,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.DURATION,
MediaStore.Video.Media.SIZE
};
Cursor cursor = getApplicationContext().getContentResolver().query(
collection,
projection,
selection,
selectionArgs,
sortOrder
)
int sizeColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE);
while (cursor.moveToNext()) {
int size = cursor.getInt(sizeColumn);
videoList.add(new Video(contentUri, name, duration, size));
}
Another way of get this using when in case of intent or ur need
File file = new File(parent,"test.mp4" );
Uri uri=Uri.fromFile(file);
long lengthSize = file.length();
FileOutputStream fos = new FileOutputStream(file);
byte[] buf = new byte[1024];
int len;
while ((len = fis.read(buf)) > 0) {
fos.write(buf, 0, len);
}
lengthSize = file.length();
Related
I want to read a 50milion record from 15G txt file and write in to elastic search
if (file.Length > 0)
{
string wwroot = _he.WebRootPath;
string contentpath = _he.ContentRootPath;
string path = Path.Combine(wwroot, "file/" + foldername);
if (!Directory.Exists(path))
{
var rcheck = Directory.CreateDirectory(path);
}
var filename = file.FileName;
var filepath = Path.Combine(path, filename);
if (filepath.Any())
{
using (FileStream stream = new FileStream(Path.Combine(path, filename), FileMode.Create))
{
file.CopyTo(stream);
}
}
string[] lines = System.IO.File.ReadAllLines(filepath);
var Plist = new List<Person>();
int i = 0;
foreach (var line in lines)
{
var newperson = new Person();
string[] sub = line.Split(":");
newperson.PId = sub[1];
newperson.FirstName = sub[2];
newperson.LastName = sub[3];
newperson.Gender = sub[4];
Plist.Add(newperson);
}
return View();
I can read and upload file but when in want to add to list I get error and only read 16000 items and my application is shutdown.
You need to read the file using a buffer. With a proper reading logic based on a buffer, you'll be able to read a file of any size.
This line here:
System.IO.File.ReadAllLines(filepath);
Reads ALL the content of 15 GB file at once, and attempts to put it all into memory. I don't know how your code managed to get past that line without throwing an OutOfMemoryException (reading "only" 4.62 GB file ate 19.2 GB of my memory when debugging).
Instead, use a buffer of a single line:
using var streamReader = File.OpenText(bigFilePath);
var fileLine = string.Empty;
while ((fileLine = streamReader.ReadLine()) != null)
{
// Your string line reading logic.
}
You will most probably not be able to keep all the records in the memory (depending on memory available), also sending them one by one to Elasticsearch would be an opposite of efficiency... so, you'll need to find a middle ground between those limitations. I would suggest batching, that is, sending records in a fixed-size groups. The size is for you to pick, but note that it shouldn't be super large or minimal, otherwise the benefits of using batching will be smaller.
Full code:
static void Main()
{
string wwroot = _he.WebRootPath;
string contentpath = _he.ContentRootPath;
string path = Path.Combine(wwroot, "file/" + foldername);
var peopleListBatch = new List<Person>();
const int BatchSize = 1024;
using var streamReader = File.OpenText(path);
var fileLine = string.Empty;
while ((fileLine = streamReader.ReadLine()) != null)
{
var lineParts = fileLine.Split(":");
var newperson = new Person
{
PId = lineParts[1],
FirstName = lineParts[2],
LastName = lineParts[3],
Gender = lineParts[4],
};
peopleListBatch.Add(newperson);
// Add to Elastic, but only when batch is full.
if (peopleListBatch.Count == BatchSize)
{
AddPersonsToElasticSearch(peopleListBatch);
peopleListBatch.Clear();
}
}
// Add remaining people, if any.
if (peopleListBatch.Count > 0)
{
AddPersonsToElasticSearch(peopleListBatch);
peopleListBatch.Clear();
}
}
Inserting to Elasticsearch is another story, and I leave that task to you:
static void AddPersonsToElasticSearch(List<Person> people)
{
// TODO: Add your inserting logic here.
}
I'm trying to save a xml document programmatically inside the Internal Storage of my Sony Android TV. I will also later on will need to accecss this file. Is it even possible to do and how should I approach this? Any suggestions or solutions?
Code:
public class xmlCreateFile {
Boolean finished = false;
String TAG = "xmlCreateFile";
public Boolean xmlCreate(){
try {
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
// root elements
Document doc = docBuilder.newDocument();
Element rootElement = doc.createElement("company");
doc.appendChild(rootElement);
// staff elements
Element staff = doc.createElement("Staff");
rootElement.appendChild(staff);
// set attribute to staff element
Attr attr = doc.createAttribute("id");
attr.setValue("1");
staff.setAttributeNode(attr);
// shorten way
// staff.setAttribute("id", "1");
// firstname elements
Element firstname = doc.createElement("firstname");
firstname.appendChild(doc.createTextNode("yong"));
staff.appendChild(firstname);
// lastname elements
Element lastname = doc.createElement("lastname");
lastname.appendChild(doc.createTextNode("mook kim"));
staff.appendChild(lastname);
// nickname elements
Element nickname = doc.createElement("nickname");
nickname.appendChild(doc.createTextNode("mkyong"));
staff.appendChild(nickname);
// salary elements
Element salary = doc.createElement("salary");
salary.appendChild(doc.createTextNode("100000"));
staff.appendChild(salary);
// write the content into xml file
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
StreamResult result = new StreamResult(path +"/file.xml");
Log.d(TAG,"Env: " + Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS));
//Output to console for testing
StreamResult result2 = new StreamResult(System.out);
// transformer.transform(source, result);
transformer.transform(source, result2);
finished = true;
} catch (ParserConfigurationException pce) {
pce.printStackTrace();
} catch (TransformerException tfe) {
tfe.printStackTrace();
}
return finished;
}
}
There are a number of ways to store data on a device. It seems like you only need this information to be visible to your app, so you can use the private Internal Storage APIs.
These APIs make it relatively easy to store and retrieve a file. Here's a short example.
// Save a file
String FILENAME = "textfile.txt";
String writeString = "hello world!";
FileOutputStream fos = getActivity().openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(writeString.getBytes());
fos.close();
// Read file
FileInputStream fis = getActivity().openFileInput(FILENAME);
StringBuilder builder = new StringBuilder();
int inputChar;
while((inputChar = fis.read()) != -1) {
builder.append((char) inputChar);
}
fis.close();
String readString = builder.toString();
PackageInstaller (https://developer.android.com/reference/android/content/pm/PackageInstaller.html) seems to have been added starting in API 21 (Lollipop), however I have not found any solid code examples on how to install an APK via this API. Any code help would be appreciated.
I’m investigating COSU/Kiosk apps for Android M Preview and was trying to implement the new feature "Silent install and uninstall of apps by Device Owner” (https://developer.android.com/preview/api-overview.html#afw) via the PackageInstaller API.
Found these, but not helpful: How to install/update/remove APK using "PackageInstaller" class in Android L?
What's "PackageInstaller" class on Lollipop, and how to use it?
Did not find any Android sample apps either.
Thanks in advance.
This is possible from Android 6.0 and up.
Make your app the Device owner.
Once your app gets the Device owner permission, we can install, uninstall and update silently without any user intervention.
public static boolean installPackage(Context context, InputStream in, String packageName)
throws IOException {
PackageInstaller packageInstaller = context.getPackageManager().getPackageInstaller();
PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(
PackageInstaller.SessionParams.MODE_FULL_INSTALL);
params.setAppPackageName(packageName);
// set params
int sessionId = packageInstaller.createSession(params);
PackageInstaller.Session session = packageInstaller.openSession(sessionId);
OutputStream out = session.openWrite("COSU", 0, -1);
byte[] buffer = new byte[65536];
int c;
while ((c = in.read(buffer)) != -1) {
out.write(buffer, 0, c);
}
session.fsync(out);
in.close();
out.close();
session.commit(createIntentSender(context, sessionId));
return true;
}
private static IntentSender createIntentSender(Context context, int sessionId) {
PendingIntent pendingIntent = PendingIntent.getBroadcast(
context,
sessionId,
new Intent(ACTION_INSTALL_COMPLETE),
0);
return pendingIntent.getIntentSender();
}
Uninstall:
String appPackage = "com.your.app.package";
Intent intent = new Intent(getActivity(), getActivity().getClass());
PendingIntent sender = PendingIntent.getActivity(getActivity(), 0, intent, 0);
PackageInstaller mPackageInstaller = getActivity().getPackageManager().getPackageInstaller();
mPackageInstaller.uninstall(appPackage, sender.getIntentSender());
Complete device owner demo app in this repo.
Figured it out, here's the code:
try
{
PackageInstaller pi = app.getPackageManager().getPackageInstaller();
int sessId = pi.createSession(new PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL));
PackageInstaller.Session session = pi.openSession(sessId);
// .. write updated APK file to out
long sizeBytes = 0;
final File file = new File(filepathApk);
if (file.isFile())
{
sizeBytes = file.length();
}
InputStream in = null;
OutputStream out = null;
in = new FileInputStream(filepathApk);
out = session.openWrite("my_app_session", 0, sizeBytes);
int total = 0;
byte[] buffer = new byte[65536];
int c;
while ((c = in.read(buffer)) != -1)
{
total += c;
out.write(buffer, 0, c);
}
session.fsync(out);
in.close();
out.close();
System.out.println("InstallApkViaPackageInstaller - Success: streamed apk " + total + " bytes");
// fake intent
Context app = this;
Intent intent = new Intent(app, AlarmReceiver.class);
PendingIntent alarmtest = PendingIntent.getBroadcast(app,
1337111117, intent, PendingIntent.FLAG_UPDATE_CURRENT);
session.commit(alarmtest.getIntentSender());
session.close();
}
catch (Exception ex)
{
ex.printStackTrace();
}
I have created a custom pipeline component which transforms a complex excel spreadsheet to XML. The transformation works fine and I can write out the data to check. However when I assign this data to the BodyPart.Data part of the inMsg or a new message I always get a routing failure. When I look at the message in the admin console it appears that the body contains binary data (I presume the original excel) rather than the XML I have assigned - see screen shot below. I have followed numerous tutorials and many different ways of doing this but always get the same result.
My current code is:
public Microsoft.BizTalk.Message.Interop.IBaseMessage Execute(Microsoft.BizTalk.Component.Interop.IPipelineContext pc, Microsoft.BizTalk.Message.Interop.IBaseMessage inmsg)
{
//make sure we have something
if (inmsg == null || inmsg.BodyPart == null || inmsg.BodyPart.Data == null)
{
throw new ArgumentNullException("inmsg");
}
IBaseMessagePart bodyPart = inmsg.BodyPart;
//create a temporary directory
const string tempDir = #"C:\test\excel";
if (!Directory.Exists(tempDir))
{
Directory.CreateDirectory(tempDir);
}
//get the input filename
string inputFileName = Convert.ToString(inmsg.Context.Read("ReceivedFileName", "http://schemas.microsoft.com/BizTalk/2003/file-properties"));
swTemp.WriteLine("inputFileName: " + inputFileName);
//set path to write excel file
string excelPath = tempDir + #"\" + Path.GetFileName(inputFileName);
swTemp.WriteLine("excelPath: " + excelPath);
//write the excel file to a temporary folder
bodyPart = inmsg.BodyPart;
Stream inboundStream = bodyPart.GetOriginalDataStream();
Stream outFile = File.Create(excelPath);
inboundStream.CopyTo(outFile);
outFile.Close();
//process excel file to return XML
var spreadsheet = new SpreadSheet();
string strXmlOut = spreadsheet.ProcessWorkbook(excelPath);
//now build an XML doc to hold this data
XmlDocument xDoc = new XmlDocument();
xDoc.LoadXml(strXmlOut);
XmlDocument finalMsg = new XmlDocument();
XmlElement xEle;
xEle = finalMsg.CreateElement("ns0", "BizTalk_Test_Amey_Pipeline.textXML",
"http://tempuri.org/INT018_Workbook.xsd");
finalMsg.AppendChild(xEle);
finalMsg.FirstChild.InnerXml = xDoc.FirstChild.InnerXml;
//write xml to memory stream
swTemp.WriteLine("Write xml to memory stream");
MemoryStream streamXmlOut = new MemoryStream();
finalMsg.Save(streamXmlOut);
streamXmlOut.Position = 0;
inmsg.BodyPart.Data = streamXmlOut;
pc.ResourceTracker.AddResource(streamXmlOut);
return inmsg;
}
Here is a sample of writing the message back:
IBaseMessage Microsoft.BizTalk.Component.Interop.IComponent.Execute(IPipelineContext pContext, IBaseMessage pInMsg)
{
IBaseMessagePart bodyPart = pInMsg.BodyPart;
if (bodyPart != null)
{
using (Stream originalStrm = bodyPart.GetOriginalDataStream())
{
byte[] changedMessage = ConvertToBytes(ret);
using (Stream strm = new AsciiStream(originalStrm, changedMessage, resManager))
{
// Setup the custom stream to put it back in the message.
bodyPart.Data = strm;
pContext.ResourceTracker.AddResource(strm);
}
}
}
return pInMsg;
}
The AsciiStream used a method like this to read the stream:
override public int Read(byte[] buffer, int offset, int count)
{
int ret = 0;
int bytesRead = 0;
byte[] FixedData = this.changedBytes;
if (FixedData != null)
{
bytesRead = count > (FixedData.Length - overallOffset) ? FixedData.Length - overallOffset : count;
Array.Copy(FixedData, overallOffset, buffer, offset, bytesRead);
if (FixedData.Length == (bytesRead + overallOffset))
this.changedBytes = null;
// Increment the overall offset.
overallOffset += bytesRead;
offset += bytesRead;
count -= bytesRead;
ret += bytesRead;
}
return ret;
}
I would first of all add more logging to your component around the MemoryStream logic - maybe write the file out to the file system so you can make sure the Xml version is correct. You can also attach to the BizTalk process and step through the code for the component which makes debugging a lot easier.
I would try switching the use of MemoryStream to a more basic custom stream that writes the bytes for you. In the BizTalk SDK samples for pipeline components there are some examples for a custom stream. You would have to customize the stream sample so it just writes the stream. I can work on posting an example. So do the additional diagnostics above first.
Thanks,
hai
Any algorithm for comparing two images with any orientation? Can any one help?
Give me some link.
Thank you
Computer Vision/Computer Graphics Collaboration Techniques
Code to compare two images in c#
public bool doImagesMatch(ref Bitmap bmp1, ref Bitmap bmp2)
{
try
{
//create instance or System.Drawing.ImageConverter to convert
//each image to a byte array
ImageConverter converter = new ImageConverter();
//create 2 byte arrays, one for each image
byte[] imgBytes1 = new byte[1];
byte[] imgBytes2 = new byte[1];
//convert images to byte array
imgBytes1 = (byte[])converter.ConvertTo(bmp1, imgBytes2.GetType());
imgBytes2 = (byte[])converter.ConvertTo(bmp2, imgBytes1.GetType());
//now compute a hash for each image from the byte arrays
SHA256Managed sha = new SHA256Managed();
byte[] imgHash1 = sha.ComputeHash(imgBytes1);
byte[] imgHash2 = sha.ComputeHash(imgBytes2);
//now let's compare the hashes
for (int i = 0; i < imgHash1.Length && i < imgHash2.Length; i++)
{
//loops, found a non-match, exit the loop
//with a false value
if (!(imgHash1[i] == imgHash2[i]))
return false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return false;
}
//we made it this far so the images must match
return true;
}