Advanced broadcasting

AndroidMainifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.webile.broadcasting"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity2"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="7" />
    <uses-permission android:name="android.permission.BROADCAST_STICKY" />

</manifest> 

FormUploader.java

package com.webile.broadcasting;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.util.Log;

public class FormUploader {

	private Context mContext;
	
	private static final String TAG = "FormUploader";

	private boolean shouldStop = false;

	public FormUploader(Context context) {
		this.mContext = context;
		mContext.registerReceiver(new BroadcastReceiver() {

			@Override
			public void onReceive(Context context, Intent intent) {
				// TODO Auto-generated method stub
				Log.v(TAG, "Trying to stop upload");
				shouldStop = true;
			}
		}, new IntentFilter(FormUploader.ACTION_STOP_UPLOAD));
	}

	public void uploadForm(int formId) {
		willStartUpload(formId);
	}

	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 = 250;
	private static final int FAKE_OPERATION_TIME = 200; //milli seconds.

	private static Intent stickyIntent;

	/*
	 * Broadcast form upload start
	 */
	private void willStartUpload(final int formId) {
		// TODO: broadcast that we are uploading the form.
		stickyIntent = new Intent(ACTION_FORM_UPLOAD);
		stickyIntent.putExtra(EXTRA_FORM_ID, formId);
		stickyIntent.putExtra(EXTRA_UPLOAD_STATUS, STATUS_BEGIN);
		stickyIntent.putExtra(EXTRA_PERCENTAGE_DONE, (int) 0);
		mContext.sendStickyBroadcast(stickyIntent);
		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) / TOTAL_DOCUMENTS));
//		mContext.sendBroadcast(intent);
		if (shouldStop) {
			//user wants to stop.
			stopUploadingFormId(formId);
		} else {
			// TODO: fake upload operation.
			Handler handler = new Handler();
			handler.postDelayed(new Runnable() {
				public void run() {
					doneUploadingDocument(formId, documentId);
				}
			}, FAKE_OPERATION_TIME);
		}
	}

	private void stopUploadingFormId(int formId) {
		Intent intent = new Intent(ACTION_FORM_UPLOAD);
		intent.putExtra(EXTRA_FORM_ID, formId);
		intent.putExtra(EXTRA_UPLOAD_STATUS, STATUS_CANCELLED);
		intent.putExtra(EXTRA_REASON, "User cancelled upload");
		mContext.sendBroadcast(intent);
		doCleanup();
	}
	
	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));

		mContext.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);
		mContext.sendBroadcast(intent);
		doCleanup();
	}

	private void doCleanup() {
		// TODO: remove the sticky intent.
		mContext.removeStickyBroadcast(stickyIntent);
	}

	public static final String ACTION_STOP_UPLOAD = "stop_upload";

}

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="startUpload" />
	</LinearLayout>
	<Button android:id="@android:id/button2" android:text="Stop current upload"
		android:layout_width="fill_parent" android:layout_height="wrap_content"
		android:enabled="false" android:onClick="stopUpload" />
	<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.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {

	ProgressBar progressBar;
	TextView statusLabel;
	Button stopButton;
	Button startButton;
	private static String TAG = "MainActivity";
	
	/** 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(
				FormUploader.ACTION_FORM_UPLOAD));
		progressBar = (ProgressBar) findViewById(android.R.id.progress);
		statusLabel = (TextView) findViewById(android.R.id.text1);
		stopButton = (Button)findViewById(android.R.id.button2);
		startButton = (Button)findViewById(android.R.id.button1);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if(super.onOptionsItemSelected(item)) return true;
		Intent intent = new Intent(this, MainActivity2.class);
		startActivity(intent);
		return true;
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		menu.add("The other activity");
		return true;
	}
	
	public void startUpload(View v) {
		new FormUploader(this).uploadForm(12345);
	}
	
	public void stopUpload(View v) {
		//TODO: send a broadcast asking the formuploader to stop itself.
		this.sendBroadcast(new Intent(FormUploader.ACTION_STOP_UPLOAD));
		Log.v(TAG,"Requesting for stop upload");
	}

	private class UploadBroadcastReceiver extends BroadcastReceiver {

		private static final String TAG = "UploadBroadcastReceiver";

		@Override
		public void onReceive(Context context, Intent intent) {
			int formId = intent.getIntExtra(FormUploader.EXTRA_FORM_ID, -1);
			int formStatus = intent.getIntExtra(
					FormUploader.EXTRA_UPLOAD_STATUS, -1);
			int documentId = intent.getIntExtra(FormUploader.EXTRA_DOCUMENT_ID,
					-1);
			int percentageDone = intent.getIntExtra(
					FormUploader.EXTRA_PERCENTAGE_DONE, 1);
			Log.v(TAG, "OnReceive formId: " + formId + " document: "
					+ documentId + " percentageDone: " + percentageDone);
			switch (formStatus) {
			case FormUploader.STATUS_BEGIN:
				startedUpload(formId);
				break;
			case FormUploader.STATUS_RUNNING:
				uploadInProgress(formId, documentId, percentageDone);
				break;
			case FormUploader.STATUS_COMPLETE:
				doneWithUpload(formId);
				break;
			case FormUploader.STATUS_CANCELLED:
				String reason = intent.getStringExtra(FormUploader.EXTRA_REASON);
				cancelledUpload(formId,reason);
				break;
			}
		}

		private void startedUpload(int formId) {
			progressBar.setProgress(0);
			String statusMessage = "Stop uploading #" + formId;
			stopButton.setText(statusMessage);
			stopButton.setEnabled(true);
			progressBar.setEnabled(true);
		}

		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);
			stopButton.setText("No running uploads");
			stopButton.setEnabled(false);
		}
		
		private void cancelledUpload(int formId, String reason) {
			statusLabel.setText(reason);
			stopButton.setText("No running uploads");
			stopButton.setEnabled(false);
			progressBar.setEnabled(false);
		}
	}
}

MainActivity2.java

package com.webile.broadcasting;

import android.view.Menu;

public class MainActivity2 extends MainActivity {

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		return false;
	}
}