CODEWITHSUNDEEP
javaandroidmultithreadingfile-uploadfor-loop
Nikhil Agrawal
Nikhil Agrawal

Reputation: 26538

Multiple file upload on web server through android app

Please can anyone provide me explanation in corresponding to method call stack

Hello there I am developing an android app in which I haver to upload some mp3 files on server

This is the the function given me to me for uploading the files

uploadToServer(String arg1, String arg2)

Now I have to send multiple upload request. I have two ArrayList of arg1 and arg2

So I am using an for loop for iterating ArrayList and sending uploading request.

So Now the problem is before first upload gets completed second starts automatically. I havent implemented threads. So why it is happening . According to call stacks concept until the first request gets over Second can.t be started. How come the second iteration of for loops gets started until the first gets finished.

Upvotes: 0

Views: 291

Answers (1)

ThaMe90
ThaMe90

Reputation: 4296

Just for completeness:

An asynchronous method will return before the action it starts completes. This is perfectly fine the method has done what it should have: start a background task that performs the action.

So in short, an asynchronous method is just an initiator for a separate (anonymous) thread that handles the action. When completed, it either fires off an event, or call a callback method (depending on the used programming language).

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Upvotes: 1

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