Develop Reference

Posting Multiple Images to Instagram using Intents

Instagram allows a single image or video to be uploaded programmatically from an Android app via Android Intents. I have been able to do this successfully. What I want to know is it possible for Instagram to handle multiple images using Intents? Not much to no information on this unfortunately. The following is my last attempt which opens Instagram briefly then closes with a toast message saying "Unable to load image".
Have tried both Intent.ACTION_SEND and Intent.ACTION_SEND_MULTIPLE
val fileUris = ArrayList<Uri>()
val newFile = File("/data/user/0/com.myapp.android/files/media/961087022.jpg")
val contentUri = getUriForFile(this, "com.myapp.fileprovider", newFile)
grantUriPermission("com.instagram.android", contentUri, FLAG_GRANT_READ_URI_PERMISSION)
fileUris.add(contentUri)
val newFile2 = File("/data/user/0/com.myapp.android/files/media/961146948.jpg")
val contentUri2 = getUriForFile(this, "com.myapp.fileprovider", newFile2)
grantUriPermission("com.instagram.android", contentUri2, FLAG_GRANT_READ_URI_PERMISSION)
fileUris.add(contentUri2)
val shareIntent = Intent(Intent.ACTION_SEND)
shareIntent.type = "image/*"
shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
shareIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, fileUris)
shareIntent.`package` = "com.instagram.android"
startActivity(Intent.createChooser(shareIntent, "Share to"))

I was looking on how to share multiple video files to instagram stories.. I couldn't find how to do it reading the facebook documentation.
Instead i set the intent to send multiple files and set the intent package to "com.instagram.android", and surprisingly it worked..
Intent share = new Intent(Intent.ACTION_SEND_MULTIPLE) ;
share.setType("video/*");
share.putExtra(Intent.EXTRA_SUBJECT, "abc");
share.putExtra(Intent.EXTRA_TITLE, "abcd");
ArrayList<Uri> files = new ArrayList<Uri>();
for (String path : filesToSend) {
File myFiles = new File(path);
Uri doneUri = FileProvider.getUriForFile(Objects.requireNonNull(getApplicationContext()),
BuildConfig.APPLICATION_ID + ".provider", myFiles);
files.add(doneUri);
}
share.setPackage("com.instagram.android");
share.putParcelableArrayListExtra(Intent.EXTRA_STREAM, files);
startActivity(share);
Hope, this helps!!

Xamarin Android Sharing Intent under Marshmallow

In my Application I try to share an Image with the Intent (Intent.ActionSend).
For the guaranteed Access I use a Fileprovider which creates the Uri to the file.
Under Android Nougat my code works but with Marshmallow not. It shows no errors but the Image is not sent to the recieving App.
The Output from VisualStudio also shows no errors or somthing like that.
I couldn't find any answer online so far. What is the problem with Marshmallow?
public void SendPhoto(IEnumerable<string> photos, string text)
{
var files = new List<Android.Net.Uri>();
//creates for every photo an own ContentURI
foreach (var path in photos)
{
var file = new Java.IO.File(path);
files.Add(FileProvider.GetUriForFile(Context, "com.testapp.fileprovider", file));
}
//Checks if Photolist are empty
if (!files.Any())
throw new Exception("Photos not found");
Intent intent = new Intent(Intent.ActionSend);
intent.SetFlags(ActivityFlags.GrantReadUriPermission);
intent.SetType("image/jpeg");
intent.PutExtra(Intent.ExtraSubject, "Subject");
intent.PutExtra(Intent.ExtraStream, files.First());
//creates the sharemessage
var shareMessage = files.Count == 1 ? "Send photo from TestApp" : "Send photos from TestApp";
//start Intent chooser
Context.StartActivity(Intent.CreateChooser(intent, shareMessage));
}

How to share folders via intent?

I have found this code for sharing image files via bluetooth/cloud storage/wifi. but how do i share the whole folder instead? here is my code-
private void shareImage() {
Intent share = new Intent(Intent.ACTION_SEND);
// If you want to share a png image only, you can do:
// setType("image/png"); OR for jpeg: setType("image/jpeg");
share.setType("image/*");
// Make sure you put example png image named myImage.png in your
// directory
String imagePath = Environment.getExternalStorageDirectory()
+ "/myImage.png";
File imageFileToShare = new File(imagePath);
Uri uri = Uri.fromFile(imageFileToShare);
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, "Share Image!"));
}

Use Intent.ACTION_SEND_MULTIPLE instead of Intent.ACTION_SEND.
Intent intent = new Intent();
intent.setAction(Intent.ACTION_SEND_MULTIPLE);
intent.putExtra(Intent.EXTRA_SUBJECT, "Here are some files.");
intent.setType("*/*"); /* allow any file type */
ArrayList<Uri> files = new ArrayList<Uri>();
for(String path : filesToSend /* List of the files you want to send */) {
File file = new File(path);
Uri uri = Uri.fromFile(file);
files.add(uri);
}
intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, files);
startActivity(intent);

Intent intent = new Intent();
intent.setAction(Intent.ACTION_SEND_MULTIPLE);
intent.putExtra(Intent.EXTRA_SUBJECT, "Here are some files.");
intent.setType("*/*"); /* allow any file type */
//Get all files in this particular location
File[] filesToSend = new File("/sdcard/myDocs").listFiles();
ArrayList<Uri> files = new ArrayList<Uri>();
for (File file : filesToSend) {
Uri uri = Uri.fromFile(file);
files.add(uri);
}
intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, files);
startActivity(intent);

Android - How do I open a file in another app via Intent?

I'm trying to open a file using another app, i.e. opening a .jpg with Gallery, .pdf with Acrobat, etc.
The problem I'm having with this is when I try to open the file in the app, it only opens the chosen app instead of opening the file within the app. I tried following Android open pdf file via Intent but I must be missing something.
public String get_mime_type(String url) {
String ext = MimeTypeMap.getFileExtensionFromUrl(url);
String mime = null;
if (ext != null) {
mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(ext);
}
return mime;
}
public void open_file(String filename) {
File file = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS), filename);
// Get URI and MIME type of file
Uri uri = Uri.fromFile(file).normalizeScheme();
String mime = get_mime_type(uri.toString());
// Open file with user selected app
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
intent.setType(mime);
context.startActivity(Intent.createChooser(intent, "Open file with"));
}
As far as I can tell, it returns the right URI and MIME type:
URI: file:///storage/emulated/0/Download/Katamari-ringtone-985279.mp3
MIME: audio/mpeg

Posting my changes here in case it can help someone else. I ended up changing the download location to an internal folder and adding a content provider.
public void open_file(String filename) {
File path = new File(getFilesDir(), "dl");
File file = new File(path, filename);
// Get URI and MIME type of file
Uri uri = FileProvider.getUriForFile(this, App.PACKAGE_NAME + ".fileprovider", file);
String mime = getContentResolver().getType(uri);
// Open file with user selected app
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(uri, mime);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
}

I used this piece of code and it worked perfectly fine on android 6 and below not tested on the higher version
public void openFile(final String fileName){
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File(android.os.Environment.getExternalStorageDirectory()
.getAbsolutePath()+ File.separator+"/Folder/"+fileName));
intent.setDataAndType(uri, "audio/mpeg");
startActivity(intent);
}

How to open an excel file in android

I have downloaded the excel file to sdcard. want to open the file in my app and process it.
Is there any way or any intent to open an excel file in android. I

Use the below mentioned code and try:
File file = new File(Environment.getExternalStorageDirectory()+ "/filepath/" + filename);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/vnd.ms-excel");
startActivity(intent);

Use this piece of code which can be used to open arbitrary file (not only Excel).
General idea is to get based on file mime type which Intent can handle it and then start those Intent. For sure it may happen that system doesn't have any intents to handle it or may have several Intents. Anyway here's general direction:
Get mime type for given filename
public String getMimeType(String filename)
{
String extension = FileUtils.getExtension(filename);
// Let's check the official map first. Webkit has a nice extension-to-MIME map.
// Be sure to remove the first character from the extension, which is the "." character.
if (extension.length() > 0)
{
String webkitMimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension.substring(1));
if (webkitMimeType != null)
return webkitMimeType;
}
return "*/*";
}
Then get default intent which will handle given mime type
public Intent getDefaultViewIntent(Uri uri)
{
PackageManager pm = this.getPackageManager();
Intent intent = new Intent(Intent.ACTION_VIEW);
// Let's probe the intent exactly in the same way as the VIEW action
String name=(new File(uri.getPath())).getName();
intent.setDataAndType(uri, this.getMimeType(name));
final List<ResolveInfo> lri = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
if(lri.size() > 0)
return intent;
return null;
}
And as final step just start Intent returned by getDefaultViewIntent()

Try this:
public void ouvrir(View view) {
String csvFile = "myData.xls";
File yourDir = new File(Environment.getExternalStorageDirectory()+ "/CHETEHOUNA/" + csvFile);
String davUrl = "ms-excel:ofv|u|" + yourDir.toString();
Uri uri = Uri.parse(davUrl);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}

Uri path = Uri.fromFile(file);
Intent excelIntent = new Intent(Intent.ACTION_VIEW);
excelIntent.setDataAndType(path , "application/vnd.ms-excel");
excelIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(excelIntent);
} catch (ActivityNotFoundException e) {
Toast.makeText(EmptyBlindDocumentShow.this,"No Application available to viewExcel", Toast.LENGTH_SHORT).show();
}

Can you elaborate?
If you want to read excel file from SD card using File, here is the code
File root = Environment.getExternalStorageDirectory();
File excelFile = new File(root, "filename.xlsx");