<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="le.random.package.sms2db" >

    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.READ_SMS" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <receiver android:name=".SMSLog">
            <intent-filter>
                <action android:name="android.provider.Telephony.SMS_RECEIVED" />
            </intent-filter>
        </receiver>

        <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>
    </application>

</manifest>
	

//imports etc..

public class SMSLog extends BroadcastReceiver {

    private SharedPreferences preferences;

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub

        if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")){
            Bundle bundle = intent.getExtras();
            SmsMessage[] msgs = null;
            String msg_from;
            String msg_body;
            if (bundle != null){
                try{
                    Object[] pdus = (Object[]) bundle.get("pdus");
                    msgs = new SmsMessage[pdus.length];
                    for(int i=0; i<msgs.length; i++){
						msgs[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);

                        msg_from = msgs[i].getOriginatingAddress();
                        String msg_body = msgs[i].getMessageBody();

                        //or break the message body by whitespaces and look for code?
                        String arrayString[] = msg_body.split("\\s+"); // you can now iterate over this as well

                        //or just check in the message for a word
                        if(msg_body.toLowerCase().contains("SomeWordToLookFor".toLowerCase())) {
                            //Valid message, now send it to DB maybe? or just log it for now
                            String tolog = "Log: ["+getreadabledate()+"] New Message: "+msg_body+" - "+msg_from+"\n";
                            Log.d("Got",tolog);
                        }
                        else {
                            //Useless message, ignore it
                            Log.e("Got : ","Invalid message. Must ignore it. ->"+ msg_body);
                            return;
                        }
                    }
                }
                catch(Exception e) {
                    Log.d("Exception caught",e.getMessage());
                }
            }
        }
    }

    /**
     * Method to convert current long type timestamp to human readable format - Easter egg ;)
     */
	public String getreadabledate() {
        long milles = System.currentTimeMillis();
        SimpleDateFormat df = new SimpleDateFormat("MMM dd yyyy HH:mm", Locale.getDefault());
        Date resultdate = new Date(milles);
        return df.format(resultdate);
    }
}
	

public class MainActivity extends AppCompatActivity {

    private Button startbtn, stopbtn;
    private int NOTIFICATION = 81237;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        startbtn = (Button) findViewById(R.id.connbtn);
        stopbtn = (Button) findViewById(R.id.disconnbtn);
	}

	/**
	 * Handling the button clicks
	 */
	public void connect(final View v) {
        startbtn.setVisibility(View.INVISIBLE);
        enableBroadcastReceiver(v);
        stopbtn.setVisibility(View.VISIBLE);
    }
    public void disconnect(final View v) {
        stopbtn.setVisibility(View.INVISIBLE);
        disableBroadcastReceiver(v);
        startbtn.setVisibility(View.VISIBLE);
    }

    /**
     * This method enables the Broadcast receiver registered in the AndroidManifest file.
     *
     * @param view
     */
    public void enableBroadcastReceiver(View view) {

        ComponentName receiver = new ComponentName(this, SMSLog.class); //created SMSLog class above!
        PackageManager pm = this.getPackageManager();

        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
        Toast.makeText(this, "Enabled logging", Toast.LENGTH_SHORT).show();

        //Let us also show a notification
        Notification notification = new Notification.Builder(getApplicationContext())
                .setContentTitle("SMS Logger Running")
                .setContentText("Status: Logging..")
                .setSmallIcon(R.drawable.ic_notif)
                .build();
        notification.flags |= Notification.FLAG_NO_CLEAR | Notification.FLAG_ONGOING_EVENT;
        NotificationManager notifier = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
        notifier.notify(NOTIFICATION, notification);
    }

    /**
     * This method disables the Broadcast receiver registered in the AndroidManifest file.
     *
     * @param view
     */
    public void disableBroadcastReceiver(View view) {
        ComponentName receiver = new ComponentName(this, SMSLog.class);
        PackageManager pm = this.getPackageManager();
        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                PackageManager.DONT_KILL_APP);
        Toast.makeText(this, "Disabled logging", Toast.LENGTH_SHORT).show();
        ((NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE)).cancel(NOTIFICATION);
    }
}