Percentage of file downloaded java

Gallery sample program in Android. Date and Time sample program in Android. Reading a file sample program in Android. Solution to error: unable to open connection to server due to security error. Progress bar and downloading a file sample program in Android. Getting Started with Android. Android Emulator. I und. Perfect example and I have achieved my task.

How to download more than one files. Awesome code workings fro me thank you so much : View Tutorial By: Shripad at I was able to modify this to work perfectly. You should then keep a sum to which you add count on each iteration.

Then just show the ratio. Sotirios It will be appreciate if you provide sample code. Add a comment. Active Oldest Votes. Luca Guglielmi Luca Guglielmi 3 3 bronze badges. Thanks for mentioning this. Be carefull, not always the server can give you the file size. I got the direction : thanks — Qadir Hussain. Sign up or log in Sign up using Google. Sign up using Facebook. However when downloading binary files, the responseType property of the request object is set to blob.

Possible values of responseType property are empty string default , arraybuffer , blob , document , json , and text. For simply downloading binary files use blob as the response type. For complex cases where you need to download a file and then manipulate the file's bytes - for example if you are building a Javascript "PPT Viewer", set arraybuffer as the response type. Here is how you can use it:. Java NIO is an alternative package to handle networking and input-output operations in Java.

The main advantage that the Java NIO package offers is that it's non-blocking, and has channeling and buffering capabilities. When we use the Java IO library we work with streams that read data byte by byte.

However, the Java NIO package uses channels and buffers. The buffering and channeling capabilities allow the system to copy contents from a URL directly into the intended file without needing to save the bytes in application memory, which would be an intermediary step. The ability to work with channels boosts performance.

The downloaded contents will be transferred to a file on the local system via the corresponding file channel. After defining the file channel we will use the transferFrom method to copy the contents read from the readChannel object to the file destination using the writeChannel object. The transferFrom and transferTo methods are much more efficient than working with streams using a buffer. The transfer methods enable us to directly copy the contents of the file system cache to the file on the system.

Thus direct channeling restricts the number of context switches required and enhances the overall code performance. Now, in the following sections, we will be looking at ways to download files from a URL using third-party libraries instead of core Java functionality components. Now you may be thinking why would we use this when Java has its own set of libraries to handle IO operations.

However, Apache Commons IO overcomes the problem of code rewriting and helps avoid writing boilerplate code. In order to start using the Apache Commons IO library, you will need to download the jar files from the official website.

When you are done downloading the jar files, you need to add them to use them.