Can anyone please tell me how to take screenshot and save it to the folder programmatically in windows phone 7.I don't want to save images in the MediaLibrary(),but i want to save it into the folder which is in the root directory of the application
This code will help you to take screenshot against an AppBar button click action. However you have to modify the code to save screenshot into root folder of the Application. The following links will help you.
Save into local storage
Data for Windows Phone
private void ApplicationBarScreenshotButton_Click(object sender, EventArgs e)
{
var fileName = String.Format("MyImage_{0:}.jpg", DateTime.Now.Ticks);
WriteableBitmap bmpCurrentScreenImage = new WriteableBitmap((int)this.ActualWidth, (int)this.ActualHeight);
bmpCurrentScreenImage.Render(LayoutRoot, new MatrixTransform());
bmpCurrentScreenImage.Invalidate();
SaveToMediaLibrary(bmpCurrentScreenImage, fileName, 100);
MessageBox.Show("Captured image " + fileName + " Saved Sucessfully", "WP Capture Screen", MessageBoxButton.OK);
currentFileName = fileName;
}
public void SaveToMediaLibrary(WriteableBitmap bitmap, string name, int quality)
{
using (var stream = new MemoryStream())
{
// Save the picture to the Windows Phone media library.
bitmap.SaveJpeg(stream, bitmap.PixelWidth, bitmap.PixelHeight, 0, quality);
stream.Seek(0, SeekOrigin.Begin);
// Use Above link to store file into Root folder.
//new MediaLibrary().SavePicture(name, stream);
}
}
Related
I am currently developing an app that uses the sqlite-net database. I am trying to copy/export the database to my SD Card. When I run the code I get a System.NullRefrenceException: 'Object reference not set to an instance of an object.'
I have tried several solutions but I always get the same exception. The issues occurs at the System.IO.File.WriteAllBytes(fileCopyName, bytes); Please help.
private void CopyDBButton_Clicked(object sender, EventArgs e)
{
var basePath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
var finalPath = Path.Combine(basePath, "Mydatabase");
CopyDatabase(finalPath);
}
public static void CopyDatabase(string databasePath)
{
var bytes = System.IO.File.ReadAllBytes(databasePath);
var fileCopyName = string.Format("/sdcard/Database_{0:dd-MM-yyyy_HH-mm-ss-tt}.db", System.DateTime.Now);
System.IO.File.WriteAllBytes(fileCopyName, bytes);
}
Did you add the two permissions listed below in your manifest file?
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
If you have confirmed that the above permissions are correctly being added, please try the code to export data from the app storage onto your SD Card:
private void Button_Clicked(object sender, EventArgs e)
{
string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "TodoSQLite.db3");
var bytes = File.ReadAllBytes(path);
var fileCopyName = string.Format("/sdcard/Database_{0:dd-MM-yyyy_HH-mm-ss-tt}.db", DateTime.Now);
File.WriteAllBytes(fileCopyName, bytes);
}
The issue was the path address. I fixed it by checking for the directory first to see if it exists, then I copy the database to the directory in a new/existing file. The issue I have now is that the file saves to phone but not the SD card, but I am just happy that the backup file is finally saving.
Below is the code is used to fix the issue:
private void CopyDBButton_Clicked(object sender, EventArgs e)
{
//Used to find the database in the special folder
string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Mydatabase");
//Used to locate the SD Card path
string path1 = Path.Combine("/sdcard/", Android.OS.Environment.DirectoryDownloads);
//Used to save the Database to a byte array
var bytes = File.ReadAllBytes(path);
//Used to check if the directory exists
if (!Directory.Exists(path1))
{
//Directory.CreateDirectory(filePathDir);
Console.WriteLine("Doesnt Exist");
}
else
{
Console.WriteLine("Does Exist");
//Used to create the name of the new Database backup file
var fileCopyName = string.Format(path1 + "/Database_{0:dd-MM-yyyy_HH-mm-ss-tt}.db", DateTime.Now);
//Write to the new database backup file
File.WriteAllBytes(fileCopyName, bytes);
}
}
I've looked at and tested extensively as this post. Below is the code for a screenshot button on PCL.
async void OnScreenshotButtonClicked(object sender, EventArgs args) {
var imageSender = (Image)sender;
var ScreenShot = DependencyService.Get<IScreenshotManager>().CaptureAsync();
await DisplayAlert("Image Saved", "The image has been saved to your device's picture album.", "OK");
}
So my question is how to turn byte[] into an image and save it to a device... For the life of me, I cannot figure out a way to save the image to the device. Any help would be greatly appreciated!!! Thanks!
Like Jason mentioned in the comments you can extend your code in the platform project by adding a File.WriteAllBytes(); line and save your file from right there.
Or you can decouple it and create another DependencyService. For instance create the IScreenshotService like: DependencyService.Get<IScreenshotService>().SaveScreenshot("MyScreenshot123", ScreenShot);
And create implementations like this:
PCL
public interface IScreenshotService
{
SaveScreenshot(string filename, byte[] imageBytes);`
}
iOS
[assembly: Xamarin.Forms.Dependency(typeof(ScreenshotService_iOS))]
namespace YourApp.iOS
{
public class ScreenshotService_iOS: IScreenshotService
{
public void SaveScreenshot(string filename, byte[] imageBytes)
{
var screenshot = new UIImage(NSData.FromArray(imageBytes));
screenshot.SaveToPhotosAlbum((image, error) =>
{
// Catch any error here
if(error != null)
Console.WriteLine(error.ToString());
// If you want you can access the image here from the image parameter
});
}
}
}
Android
[assembly: Xamarin.Forms.Dependency(typeof(Picture_Droid))]
namespace YourApp.Droid
{
public class ScreenshotService_Android : IScreenshotService
{
public void SaveScreenshot(string filename, byte[] imageBytes)
{
var dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDcim);
var pictures = dir.AbsolutePath;
// You might want to add a unique id like GUID or timestamp to the filename, else you could be overwriting an older image
string filePath = System.IO.Path.Combine(pictures, filename);
try
{
// Write the image
File.WriteAllBytes(filePath, imageData);
// With this we add the image to the image library on the device
var mediaScanIntent = new Intent(Intent.ActionMediaScannerScanFile);
mediaScanIntent.SetData(Uri.FromFile(new File(filePath)));
Xamarin.Forms.Forms.Context.SendBroadcast(mediaScanIntent);
}
catch(Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
}
Don't forget to add the appropriate permissions on the Android app (probably WRITE_EXTERNAL_STORAGE is enough)
Lastly you could look at third-party libraries like Splat for example.
I am working on a chat app:
If the user taps on an image, it will show in full size. The following method is called:
Handle_Tapped():
void Handle_Tapped(object sender, System.EventArgs e)
{
try
{
Image image = sender as Image;
string filePath = String.Empty;
filePath = image.Source as FileImageSource;
Eva3Toolkit.CommonUtils.openImage(filePath);
}
catch (Exception ex)
{
throw ex;
}
}
Which calls (depending on the OS):
openImage() in Android:
public void openImage(string filePath)
{
Intent sendIntent = new Intent(Intent.ActionView);
sendIntent.SetDataAndType(Android.Net.Uri.Parse("file:" + filePath), "image/*");
Forms.Context.StartActivity(Intent.CreateChooser(sendIntent, "Bild öffnen..."));
}
openImage() in iOS:
public void openImage(string filePath)
{
var firstController = ((UIApplicationDelegate)(UIApplication.SharedApplication.Delegate)).Window.RootViewController.ChildViewControllers[0].ChildViewControllers[1].ChildViewControllers[0];
var navcontroller = firstController as UINavigationController;
var docIC = UIDocumentInteractionController.FromUrl(new NSUrl(filePath, true));
docIC.Delegate = new DocInteractionC(navcontroller);
docIC.PresentPreview(true);
}
Now I want to create a method openImage() in UWP, but I don't know know. I know that I will most likely have to work with the image as a StorageFile instead of the path because only a StorageFile grants me permission to open the image.
Is there a way to open the image in full size in UWP? I highly prefer to not create a new view for this.
A Launcher can open a file with the program that is assigned to the file:
public async void openImageAsync(string filePath)
{
StorageFile storageFile = await StorageFile.GetFileFromPathAsync(filePath);
await Launcher.LaunchFileAsync(storageFile);
}
For my situation it's working that I use filePath because the files are in a local folder.
The output looks like this:
This may sound very simple but I've lost a lot of time looking for answer
In my Windows phone 8 app I use the PhotoChooserTask to let the user choose the photo, and i get the path of the photo by using
string FileName = e.OriginalFileName;
where e is the PhotoResult argument of the Task. , let's say: FileName=
"C:\Data\SharedData\Comms\Unistore\data\18\k\2000000a00000018700b.dat" (selected from the cloud) or
"D:\Pictures\Camera Roll\WP_20140110_10_40_42_1_Smart.jpg" (from camera roll)
I want to save that string path and open it up and show the image again when the users reopen the app. But I cannot find a method to convert those string into Image data (BitmapImage or Stream)
Any idea?
private void PhotoChooserTaskCompleted(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
var image = new BitmapImage();
image.SetSource(e.ChosenPhoto);
SaveImageAsync(image);
}
}
public async void SaveImageAsync(BitmapImage image)
{
await Task.Run(SaveImage(image));
}
public async Task SaveImage(BitmapImage image)
{
IStorageFolder folder = await ApplicationData.Current.LocalFolder
.CreateFolderAsync("Images", CreationCollisionOption.OpenIfExists);
IStorageFile file = await folder.CreateFileAsync(
imageFileName, CreationCollisionOption.ReplaceExisting);
using (Stream stream = await file.OpenStreamForWriteAsync())
{
var wrBitmap = new WriteableBitmap(image);
wrBitmap.SaveJpeg(stream, image.PixelWidth, image.PixelHeight, 100, 100);
}
}
At Windows Phone 8.1 you can try "StorageFolder.GetFolderFromPathAsync" static method (if this API is available at your app flavor) and then get a stream for a necessary file from that folder.
I have a Mango WP7.5 app that uses a local SqlCe database. I would like to add a LiveTile update that shows info taken from the local DB based on current day and month.
All the samples that I've found update the background by downloading remote images from servers but I would simply need to make a local database query and show a string in my tile.
Can I do it? How?
Yes, you can. You have to
generate an image containing your textual information
save this image to isolated storage and
access it via isostore URI.
Here is code showing how to do this (it updates the Application Tile):
// set properties of the Application Tile
private void button1_Click(object sender, RoutedEventArgs e)
{
// Application Tile is always the first Tile, even if it is not pinned to Start
ShellTile TileToFind = ShellTile.ActiveTiles.First();
// Application Tile should always be found
if (TileToFind != null)
{
// create bitmap to write text to
WriteableBitmap wbmp = new WriteableBitmap(173, 173);
TextBlock text = new TextBlock() { FontSize = (double)Resources["PhoneFontSizeExtraLarge"], Foreground = new SolidColorBrush(Colors.White) };
// your text from database goes here:
text.Text = "Hello\nWorld";
wbmp.Render(text, new TranslateTransform() { Y = 20 });
wbmp.Invalidate();
// save image to isolated storage
using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
{
// use of "/Shared/ShellContent/" folder is mandatory!
using (IsolatedStorageFileStream imageStream = new IsolatedStorageFileStream("/Shared/ShellContent/MyImage.jpg", System.IO.FileMode.Create, isf))
{
wbmp.SaveJpeg(imageStream, wbmp.PixelWidth, wbmp.PixelHeight, 0, 100);
}
}
StandardTileData NewTileData = new StandardTileData
{
Title = "Title",
// reference saved image via isostore URI
BackgroundImage = new Uri("isostore:/Shared/ShellContent/MyImage.jpg", UriKind.Absolute),
};
// update the Application Tile
TileToFind.Update(NewTileData);
}
}