ScattActivity.java

package me.arpith.dmucscom;

import android.database.Cursor;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.os.RemoteException;
import android.provider.BaseColumns;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class ScattActivity extends ScatterFriend {
	public static final String TAG = ScattActivity.class.getSimpleName();
	private EditText writeTweetView;
	private String[] devices = {};
	private boolean abort = false;

	String UserName = "Arpith";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		getActionBar().setBackgroundDrawable(new ColorDrawable(Color.BLACK));
		
		writeTweetView = (EditText) findViewById(R.id.writeTweet);
		ListView tweetList = (ListView) findViewById(R.id.tweetList);

		String[] proj = new String[] { BaseColumns._ID, Constant.AUTHORID,
				Constant.AUTHOR, Constant.MES, Constant.DATETIME };

		showNumofMem();

		Cursor c = managedQuery(Constant.TWEET_CONTENT_URI, proj, null, null,
				null);
		SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
				R.layout.tweetitem, c, new String[] { Constant.AUTHOR,
						Constant.DATETIME, Constant.MES }, new int[] {
						R.id.tweetAuthor, R.id.tweetTimeStamp, R.id.tweetMes });
		tweetList.setAdapter(adapter);

		Cursor tweets = getContentResolver().query(Constant.TWEET_CONTENT_URI,
				proj, null, null, null);
		if (tweets.getCount() == 0)
			insertToDB("Disaster Recovery",
					"You may now start chatting with people around you..");
	}

	public void writeTweet(View v) {
		String myTweet = writeTweetView.getText().toString();
		if (!myTweet.equals("")) {
			boolean insert = insertToDB(UserName, myTweet);
			if (insert)
				writeTweetView.setText("");
		}
		try {
			// All messages to be sent out must be separated with "|" between
			// units
			// A tweet is composed of three units(identifier+name+content)

			myTweet = TWEET + "|" + UserName + "|" + myTweet;
			devices = beddernetService.getDevices(applicationIdentifier);

			beddernetService.sendMulticast(devices, null, myTweet.getBytes(),
					applicationIdentifier);

		} catch (RemoteException e) {
			Log.e(TAG, "unable to get peer devices, are you out of network?");
		}
	}

	@Override
	public void onDestroy() {
		super.onDestroy();
		abort = true;
	}

	public void showNumofMem() {
		new Thread(new Runnable() {
			@Override
			public void run() {
				Log.d(TAG, "updating number of members");
				while (!abort) {
					try {
						if (beddernetService != null)
							devices = beddernetService
									.getDevices(applicationIdentifier);
					} catch (RemoteException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}
					runOnUiThread(new Runnable() {
						@Override
						public void run() {
							// numOfMembers.setText(devices.length+" ");
							writeTweetView.setHint("Number of devices: "
									+ devices.length);
						}
					});
					try {
						Thread.sleep(3000);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}
		}).start();
	}

}