Estimote SDK: Building a beacon Android app ---- 2/3

since: 2016/07/20
update: 2016/07/20
reference:
1. Beacon Tech Overview - Estimote Developer

Part 2: Background monitoring
 
A. Add a beacon manager
    1. 新增一個 MyApplication Java Class:
        > 點選 MainActivity class 所屬的套件 > 滑鼠右鍵 > New
        > Java Class

      > Name: MyApplication
      > Kind: Class
      > OK

     > 結果:

    2. 開啟 MyApplication.java 修改如下:
package myhome.airport;

import android.app.Application;
import com.estimote.sdk.BeaconManager;

//public class MyApplication {
public class MyApplication extends Application {

    private BeaconManager beaconManager;

    @Override
    public void onCreate() {
        super.onCreate();

        beaconManager = new BeaconManager(getApplicationContext());
    }
}

    3. 在 AndroidManifest.xml 裡, 宣告此類別:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="myhome.airport">

    <application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

-----------------------------------------------------------------------------------------------

B. Start monitoring
     1. 開啟 MyApplication.java 修改如下:

package myhome.airport;

import android.app.Application;
import com.estimote.sdk.BeaconManager;
import com.estimote.sdk.Region;

import java.util.UUID;

//public class MyApplication {
public class MyApplication extends Application {

    private BeaconManager beaconManager;

    @Override
    public void onCreate() {
        super.onCreate();

        beaconManager = new BeaconManager(getApplicationContext());

        beaconManager.connect(new BeaconManager.ServiceReadyCallback() {

            @Override
            public void onServiceReady() {

                // Monitor: UUID, major, minor
                /*
                beaconManager.startMonitoring(new Region(
                        "monitored region",
                        UUID.fromString("FDA50693-A4E2-4FB1-AFCF-C6EB07647825"),
                        0, 5));
                */

                // Monitor: UUID, major
                /*
                beaconManager.startMonitoring(new Region(
                        "monitored region",
                        UUID.fromString("FDA50693-A4E2-4FB1-AFCF-C6EB07647825"),
                        0, null));
                */

                // Monitor: UUID
                beaconManager.startMonitoring(new Region(
                        "monitored region",
                        UUID.fromString("FDA50693-A4E2-4FB1-AFCF-C6EB07647825"),
                        null, null));
            }
        });
    }
}

-----------------------------------------------------------------------------------------------

C. Show an "enter / exit" notification
     1. add a helper method to the MyApplication class:
         // 開啟 MyApplication.java 修改如下:

package myhome.airport;

import android.app.Application;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;

import com.estimote.sdk.BeaconManager;
import com.estimote.sdk.Region;

import java.util.UUID;

//public class MyApplication {
public class MyApplication extends Application {
....

    // show Notification
    public void showNotification(String title, String message) {

        Intent notifyIntent = new Intent(this, MainActivity.class);
        notifyIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivities(this, 0,
                new Intent[] { notifyIntent }, PendingIntent.FLAG_UPDATE_CURRENT);

        Notification notification = new Notification.Builder(this)
                .setSmallIcon(android.R.drawable.ic_dialog_info)
                .setContentTitle(title)
                .setContentText(message)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .build();
        notification.defaults |= Notification.DEFAULT_SOUND;
       
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1, notification);
    }

}

     2. 開啟 MyApplication.java 修改如下:
package myhome.airport;

import android.app.Application;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;

import com.estimote.sdk.Beacon;
import com.estimote.sdk.BeaconManager;
import com.estimote.sdk.Region;

import java.util.List;
import java.util.UUID;

//public class MyApplication {
public class MyApplication extends Application {

    private BeaconManager beaconManager;

    @Override
    public void onCreate() {
        super.onCreate();

        beaconManager = new BeaconManager(getApplicationContext());

        beaconManager.setMonitoringListener(new BeaconManager.MonitoringListener() {

            // on Entered Region
            @Override
            public void onEnteredRegion(Region region, List<Beacon> list) {

                showNotification(
                        "Notification",
                        "You Entered Region!");
            }

            // on Exited Region
            @Override
            public void onExitedRegion(Region region) {
                showNotification(
                        "Notification",
                        "You Exited Region!");
            }
        });
  }
....
}

     3. 結果: