An android activity which demonstrates uploding of data using Broadcaster and Receiver model. This works even when the upload doesnot happen in the same class.

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<LinearLayout android:orientation="horizontal"
		android:layout_width="fill_parent" android:layout_height="wrap_content">
		<EditText android:id="@android:id/edit" android:layout_width="wrap_content"
			android:layout_height="wrap_content" android:layout_weight="1"
			android:text="12345" />
		<Button android:id="@android:id/button1" android:layout_width="wrap_content"
			android:layout_height="wrap_content" android:layout_weight="0"
			android:text="Upload" android:onClick="onClick" />
	</LinearLayout>
	<TextView android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="Progress" />
	<ProgressBar android:max="100" android:id="@android:id/progress" style="?android:attr/progressBarStyleHorizontal"
		android:layout_width="fill_parent" android:layout_height="wrap_content" />
	<TextView android:id="@android:id/text1" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="Upload status shows up here" />
</LinearLayout>

MainActivity.java

package com.webile.broadcasting;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {
	
	ProgressBar progressBar;
	TextView statusLabel;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        registerReceiver(new UploadBroadcastReceiver(), new IntentFilter(ACTION_FORM_UPLOAD));
        progressBar = (ProgressBar)findViewById(android.R.id.progress);
        statusLabel = (TextView) findViewById(android.R.id.text1);
    }
    
    public void onClick(View v) {
    	startUpload(12345);
    }
    private void startUpload(int formId) {
    	willStartUpload(formId);
    }
    
    /*
     * Broadcast form upload start
     */
    
    public static final String ACTION_FORM_UPLOAD = "form_upload";
    public static final String EXTRA_FORM_ID = "form_id";
    public static final String EXTRA_DOCUMENT_ID = "document_id";
    public static final String EXTRA_PERCENTAGE_DONE = "percentage_done";
    public static final String EXTRA_UPLOAD_STATUS = "upload_status";
    public static final String EXTRA_REASON = "fail_reason";
    public static final int STATUS_BEGIN = 0x1;
    public static final int STATUS_RUNNING = 0x2;
    public static final int STATUS_COMPLETE = 0x3;
    public static final int STATUS_CANCELLED = 0x4;
    
    private static final int TOTAL_DOCUMENTS = 10;
    
    private void willStartUpload(final int formId) {
    	//TODO: broadcast that we are uploading the form.
    	Intent intent = new Intent(ACTION_FORM_UPLOAD);
    	intent.putExtra(EXTRA_FORM_ID, formId);
    	intent.putExtra(EXTRA_UPLOAD_STATUS, STATUS_BEGIN);
    	intent.putExtra(EXTRA_PERCENTAGE_DONE, (int)0);
    	sendBroadcast(intent);
    	uploadDocument(formId, 1);
    }
    
    /**
     * A fake HTTP upload operation.
     * @param formId
     * @param documentId
     */
    private void uploadDocument(final int formId, final int documentId) {
    	//TODO: broadcast that the document is being uploaded.
    	Intent intent = new Intent(ACTION_FORM_UPLOAD);
    	intent.putExtra(EXTRA_FORM_ID, formId);
    	intent.putExtra(EXTRA_UPLOAD_STATUS, STATUS_RUNNING);
    	intent.putExtra(EXTRA_DOCUMENT_ID, documentId);
    	intent.putExtra(EXTRA_PERCENTAGE_DONE, (int)(100 * (documentId-1) / TOTAL_DOCUMENTS));
    	sendBroadcast(intent);
    	
    	//TODO: fake upload operation.
    	Handler handler = new Handler();
    	handler.postDelayed(new Runnable(){
    		public void run(){
    			doneUploadingDocument(formId, documentId);
    		}
    	}, 5000);
    }
    
    private void doneUploadingDocument(int formId, int documentId) {
    	Log.v("Upload", "Done uploading document: "+documentId);
    	//TODO: broadcast that the document is done uploading.
    	Intent intent = new Intent(ACTION_FORM_UPLOAD);
    	intent.putExtra(EXTRA_FORM_ID, formId);
    	intent.putExtra(EXTRA_DOCUMENT_ID, documentId);
    	intent.putExtra(EXTRA_UPLOAD_STATUS, STATUS_RUNNING);
    	intent.putExtra(EXTRA_PERCENTAGE_DONE, (int)(100 * documentId / TOTAL_DOCUMENTS));

    	sendBroadcast(intent);
    	
    	if(documentId <= TOTAL_DOCUMENTS) {
    		uploadDocument(formId, documentId + 1);
    	} else {
    		didCompleteUpload(formId);
    	}
    }
    
    private void didCompleteUpload(int formId) {
    	//TODO: broadcast that the form got completed.
    	Intent intent = new Intent(ACTION_FORM_UPLOAD);
    	intent.putExtra(EXTRA_FORM_ID, formId);
    	intent.putExtra(EXTRA_UPLOAD_STATUS, STATUS_COMPLETE);
    	intent.putExtra(EXTRA_PERCENTAGE_DONE, (int)100);
    	sendBroadcast(intent);
    }
    
    private class UploadBroadcastReceiver extends BroadcastReceiver {

    	private static final String TAG = "UploadBroadcastReceiver";
		@Override
		public void onReceive(Context context, Intent intent) {
			int formId = intent.getIntExtra(EXTRA_FORM_ID, -1);
			int formStatus = intent.getIntExtra(EXTRA_UPLOAD_STATUS, -1);
			int documentId = intent.getIntExtra(EXTRA_DOCUMENT_ID, -1);
			int percentageDone = intent.getIntExtra(EXTRA_PERCENTAGE_DONE, 1);
			Log.v(TAG, "OnReceive formId: "+formId+" document: "+documentId+" percentageDone: "+percentageDone);
			switch(formStatus) {
			case STATUS_BEGIN: 
				startedUpload(formId);
				break;
			case STATUS_RUNNING:
				uploadInProgress(formId,documentId, percentageDone);
				break;
			case STATUS_COMPLETE:
				doneWithUpload(formId);
				break;
			case STATUS_CANCELLED:
				break;
			}
		}
    	
		private void startedUpload(int formId) {
			progressBar.setProgress(0);
			String statusMessage = "Started uploading form #"+formId;
			statusLabel.setText(statusMessage);
		}
		
		private void uploadInProgress(int formId, int documentId, int percentage) {
			progressBar.setProgress(percentage);
			statusLabel.setText("Done uploading document "+documentId+" of form #"+formId);
		}
		
		private void doneWithUpload(int formId) {
			progressBar.setProgress(progressBar.getMax());
			String statusMessage = "Done uploading form #"+formId;
			statusLabel.setText(statusMessage);
		}
    }
}