How to get gmail attachment into local device store with intent filter - xamarin.forms

Question

In my application i want to open gmail attachment with my application, i used intent filter for that,
I am getting URI and i want to use that and copy that attachment to my local device and want to display that with my application .
url = {content://com.google.android.gm.sapi/abc#gmail.com/message_attachment_external/%23thread-f%3A1610966348228029097/%23msg-f%3A1610966348228029097/0.1?account_type=com.google&mimeType=application%2Foctet-stream&rendition=1}
After a days of research and implementation, Here is a final solution for gmail attachment file , to view and down load in our application.
[IntentFilter(new string[] { Intent.ActionView }, Categories = new string[] { Intent.CategoryDefault, Intent.CategoryBrowsable }, DataScheme = "content", DataMimeType = "application/octet-stream")]
Stream inputsTream = resolver.OpenInputStream(url);
fs = File.Create(fileName);
byte[] buffer = new byte[32768];
int count;
int offset = 0;
while ((count = inputsTream.Read(buffer, offset, buffer.Length)) > 0)
{
fs.Write(buffer, 0, count);
}
fs.Close();
inputsTream.Close();

Answer 1

private fun deepLinkAcceptor(){
var ins: InputStream? = null
var os: FileOutputStream? = null
var fullPath: String? = null
var file: File;
try {
val action = intent.action
if (Intent.ACTION_VIEW != action) {
return
}
val uri = intent.data
val scheme = uri!!.scheme
var name: String? = null
if (scheme == "content") {
val cursor = contentResolver.query(
uri!!, arrayOf(
MediaStore.MediaColumns.DISPLAY_NAME
), null, null, null
)
cursor!!.moveToFirst()
val nameIndex = cursor!!.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME)
if (nameIndex >= 0) {
name = cursor!!.getString(nameIndex)
}
} else {
return
}
if (name == null) {
return
}
val n = name.lastIndexOf(".")
val fileName: String
val fileExt: String
if (n == -1) {
return
} else {
fileName = name.substring(0, n)
fileExt = name.substring(n)
}
// create full path to where the file is to go, including name/ext
fullPath = ""
val filenm = fileName + fileExt
file = File(cacheDir, filenm)
ins = contentResolver.openInputStream(uri!!)
os = FileOutputStream(file.getPath())
val buffer = ByteArray(4096)
var count: Int
while (ins!!.read(buffer).also { count = it } > 0) {
os!!.write(buffer, 0, count)
}
os!!.close()
ins!!.close()
println("===onfile path: " + file.getAbsolutePath())
println("===onFile name: " + file.readText())
} catch (e: Exception) {
if (ins != null) {
try {
ins.close()
} catch (e1: Exception) {
}
}
if (os != null) {
try {
os.close()
} catch (e1: Exception) {
}
}
if (fullPath != null) {
val f = File(fullPath)
f.delete()
}
}
}