Android Open Source - notify Background Service

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.example.notify;
//from  w  ww.  j a va 2s  . c  o m
import android.app.IntentService;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;

public class BackgroundService extends IntentService {
    public static MainActivity ma;
    public static AccessibilityListenerService aa;
    public static Boolean reading = false;
    public static Socket s;
    public static Uri host = Uri.parse("notify://null:0");
    public static DataInputStream dis;
    public static DataOutputStream dos;
    public IntentBroadcastReceiver ibr = new IntentBroadcastReceiver();
    private Boolean filterRegistered = false;

    public BackgroundService() {
        super("BackgroundService");
    }

    protected void onHandleIntent(Intent i) {
        if (BackgroundService.reading) {
            stopSelf();
            return;
        }

        Uri u = i.getData();
        BackgroundService.host = u;
        if (tryConnect(u)) {
            IntentFilter filter = new IntentFilter();
            filter.addAction("android.intent.action.BATTERY_CHANGED");
            registerReceiver(ibr, filter);
            filterRegistered = true;

            read();
        } else {
            BackgroundService.s = null;
            stopSelf();
        }
    }

    public void onDestroy() {
        super.onDestroy();
        if (filterRegistered) {
            unregisterReceiver(ibr);
        }
    }

    private boolean tryConnect(Uri host) {
        try {
            Integer port = 18081;
            if (host.getPort() != -1) {
                port = host.getPort();
            }
            if (BackgroundService.s == null) {
                BackgroundService.s = new Socket();
                BackgroundService.s.connect(new InetSocketAddress(host.getHost(), port), 4000);
            }
            BackgroundService.dos = new DataOutputStream(BackgroundService.s.getOutputStream());
            BackgroundService.dis = new DataInputStream(BackgroundService.s.getInputStream());
            OurUtils.sendMessageToActivity(EnumMessage.connection_succeeded);
            return true;
        } catch (Exception e) {
            OurUtils.sendMessageToActivity(EnumMessage.connection_failed, e.toString());
            return false;
        }
    }

    public void sendToServer(String s) {
        if (!BackgroundService.reading) {
            return;
        }
        try {
            BackgroundService.dos.writeBytes(s + "\r\n");
        } catch (Exception e) {
            OurUtils.sendMessageToActivity(EnumMessage.connection_died, e.toString());
        }
    }
    public void read() {
        if (BackgroundService.reading) {
            return;
        }
        BackgroundService.reading = true;
        String line;
        String error = "";
        while (BackgroundService.reading) {
            try {
                line = BackgroundService.dis.readLine().trim();
            } catch (Exception e) {
                if (BackgroundService.reading) {
                    error = e.toString();
                }
                break;
            }
            String[] linesplit = line.split(" ");
            if (linesplit[0].equals("PING") && linesplit.length > 1) {
                sendToServer("PONG " + linesplit[1]);
            }
        }
        BackgroundService.reading = false;
        if (!error.equals("")) {
            OurUtils.sendMessageToActivity(EnumMessage.connection_died, error);
        }
        BackgroundService.s = null;
        stopSelf();
    }
}
Java Source Code List
