I have two beacons and when this first beacon comes within 1 meter i fired first activity and when second beacon comes within 1 meter i fired second activity.

Now what i want is if first activity is fired once then application should not launch first activity again but the problem is that if i press back button from first activity then first activity again get launched if first beacon is in 1 meter and i am facing same problem for second beacon

My manifest file code is:

```
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.altbeacon.beaconreference"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="17"
        android:targetSdkVersion="21" />
    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>

    <application 
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" 
        android:name="org.altbeacon.beaconreference.MyApplicationName">

    <activity
            android:launchMode="singleInstance"  
            android:name="org.altbeacon.beaconreference.FirstActivity"
            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:launchMode="singleInstance"  
            android:name="org.altbeacon.beaconreference.SecondActivity"
            android:label="@string/app_name" >
            <intent-filter>
        <action android:name="org.altbeacon.beaconreference.SECONDACTIVITY" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity> 

    </application>

</manifest>

```

My application class code is :

```
import java.util.Collection;
import android.app.Application;
import android.content.Intent;
import android.os.RemoteException;
import android.util.Log;
import android.widget.Toast;
import org.altbeacon.beacon.powersave.BackgroundPowerSaver;
import org.altbeacon.beacon.startup.BootstrapNotifier;
import org.altbeacon.beacon.startup.RegionBootstrap;
import org.altbeacon.beacon.Beacon;
import org.altbeacon.beacon.BeaconManager;
import org.altbeacon.beacon.BeaconParser;
import org.altbeacon.beacon.RangeNotifier;
import org.altbeacon.beacon.Region;

public class MyApplicationName extends Application implements BootstrapNotifier, RangeNotifier {
    private static final String TAG = ".MyApplicationName";
    private RegionBootstrap regionBootstrap;
    private BeaconManager  mBeaconManager;
    private Region region;
    private Region mAllBeaconsRegion;
    private BackgroundPowerSaver mBackgroundPowerSaver;
    private RegionBootstrap mRegionBootstrap;
    private static final String ESTIMOTE_PROXIMITY_UUID = "XYZ";
    @Override
    public void onCreate() {    

        mAllBeaconsRegion = new Region("all beacons",null, null, null);     
        mBeaconManager = BeaconManager.getInstanceForApplication(this);
        mBackgroundPowerSaver = new BackgroundPowerSaver(this);             
        mRegionBootstrap = new RegionBootstrap(this, mAllBeaconsRegion);      
        // By default the AndroidBeaconLibrary will only find AltBeacons.  If you wish to make it
        // find a different type of beacon, you must specify the byte layout for that beacon's
        // advertisement with a line like below.  The example shows how to find a beacon with the
        // same byte layout as AltBeacon but with a beaconTypeCode of 0xaabb
        //        
        Log.d(TAG, " region.  starting ranging");        
        mBeaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));        
        mBeaconManager.setBackgroundScanPeriod(11000l);        
        mBeaconManager.setBackgroundBetweenScanPeriod(30000l);

    }

    @Override
    public void didDetermineStateForRegion(int arg0, Region arg1) {
        // Don't care
    }

    @Override
    public void didEnterRegion(Region arg0) {

        //mRegionBootstrap.disable();
        try {
            //mBeaconManager.startRangingBeaconsInRegion(region);
            mBeaconManager.startRangingBeaconsInRegion(mAllBeaconsRegion);

            mBeaconManager.setRangeNotifier(this);
        } catch (RemoteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }               
        //Toast.makeText(this, "didEnterRegion", Toast.LENGTH_LONG).show();
        //Toast.makeText(this, "didEnterRegion", Toast.LENGTH_LONG).show();
        Log.d(TAG, "Got a didEnterRegion call");
        // This call to disable will make it so the activity below only gets launched the first time a beacon is seen (until the next time the app is launched)
        // if you want the Activity to launch every single time beacons come into view, remove this call.  

    }

    @Override
    public void didExitRegion(Region arg0) {
        // Don't care
    }

    @Override
    public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {

        //mRegionBootstrap.disable();
        // TODO Auto-generated method stub

        if (beacons.size() > 0) {        
            for (Beacon beacon: beacons) {          
                String beconid=beacon.toString();               

                if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 20155 id3: 28577"))
                {
                    Log.d(TAG, "within 1 minute call");
                    Intent intent = new Intent(this, FirstActivity.class);
                    // IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
                    // created when a user launches the activity manually and it gets launched from here.
                      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                      this.startActivity(intent);                     
                } 

                if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 8128 id3: 59794"))
                {
                    Log.d(TAG, "within 1 minute call");
                    Intent intent = new Intent(this, SecondActivity.class);
                    // IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
                    // created when a user launches the activity manually and it gets launched from here.
                      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                      this.startActivity(intent);                     
                } 

            }

        }
    }        
}

```