问题
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"))
来源：https://stackoverflow.com/questions/50460270/posting-multiple-images-to-instagram-using-intents