Android - I want to show file upload progress to the user

Question

I upload photo to the server via the default HttpClient in Android SDK. I want to show progress in the user interface, is there a way to find out how much has been uploaded?

Answer 1

1) Be sure to perform your upload in a Service with its own thread.

2) To get the progress: Wrap your InputStream in this class, and use a a httpmime.jar library which has MultiPart support for HttpClient. I used a thread which checks the progress and updates the progressbar in the notification.

package com.hyves.android.service.upload;

import java.io.IOException;
import java.io.InputStream;

/**
 * This outputstream wraps an existing outputstream and provides 
 * callbacks after certain amount of bytes to a HttpCallback
 * 
 * @author tjerk
 */
public class ProgressNotifyingInputStream extends InputStream {
    private InputStream wrappedStream;
    private int count = 0;
    private int totalSize;

    /**
     * Creates a new notifying outputstream which wraps an existing one.
     * When you write to this stream the callback will be notified each time when
     * updateAfterNumberBytes is written.
     * 
     * @param stream the outputstream to be wrapped
     * @param totalSize the totalsize that will get written to the stream
     */
    public ProgressNotifyingInputStream(InputStream stream, int totalSize) {
        if(stream==null) {
            throw new NullPointerException();
        }
        if(totalSize == 0) {
            throw new IllegalArgumentException("totalSize argument cannot be zero");
        }
        this.wrappedStream = stream;
        this.totalSize = totalSize;
    }


    @Override
    public int read() throws IOException {
        count++;
        return wrappedStream.read();
    }

    /**
     * Get progress from 0 to 100
     * @return
     */
    public int getProgress() {
        return count * 100 / totalSize;
    }

}