ITブログ時々なんでもブログ

<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />

[BroadcastReceiver]
[IntentFilter(new[] { Intent.ActionBootCompleted,
                        "android.intent.action.QUICKBOOT_POWERON",
                        "com.htc.intent.action.QUICKBOOT_POWERON",
                        "android.intent.action.PACKAGE_INSTALL",
                        "android.intent.action.PACKAGE_ADDED",
                        Intent.ActionMyPackageReplaced })]
public class BootReceiver : BroadcastReceiver
{
    private static PowerManager.WakeLock _wakeLock = null;

    public override void OnReceive(Context context, Intent intent)
    {
        //画面ロックの取得
        PowerManager pm = (PowerManager)context.GetSystemService(Context.PowerService);
        _wakeLock = pm.NewWakeLock(WakeLockFlags.Partial, "BootReceiver");
        _wakeLock.Acquire();

        //リマインダーをセット
        this.SetReminder(context);

        //サービスの起動
        //以前の記事でご紹介済みなので割愛

    }

    //Android用のリマインダー
    public void SetReminder(Context context)
    {
        Intent alarmIntent = new Intent(context, typeof(BootReceiver));
        PendingIntent pendingIntent = PendingIntent.GetBroadcast(context, 0, alarmIntent, PendingIntentFlags.UpdateCurrent);
        AlarmManager alarmManager = (AlarmManager)context.GetSystemService(Context.AlarmService);

        //AlarmManagerで１時間に１回の実行を予約する
        long fireTime = SystemClock.ElapsedRealtime() + 60 * 1000 * 60; //60s*1000ms*60minutes=1hour
        alarmManager.SetInexactRepeating(AlarmType.ElapsedRealtimeWakeup, fireTime, AlarmManager.IntervalHour, pendingIntent);
    }

    public static void ReleaseWakeLock()
    {
        if (_wakeLock != null)
        {
            _wakeLock.Release();
        }
    }
}

[Service(Name = "com.CompanyName.BootReceiverTest.BackgroundService", Exported = false, Process = ":TestProcess")]
public class BackgroundService : IntentService
{
    public override IBinder OnBind(Intent intent)
    {
        return null;
    }
    //ServicのOnStartCommandはコメントアウトする（バックグラウンドサービスが再起動しないように）
    //public override StartCommandResult OnStartCommand(Android.Content.Intent intent, StartCommandFlags flags, int startId)
    //{
    //    Thread t = new Thread(() =>
    //    {
    //        //Xamarinを有効化
    //        var bundle = new Bundle();
    //        global::Xamarin.Forms.Forms.Init(this, bundle);

    //        while (true)
    //        {
    //            System.Threading.Thread.Sleep(10000);
    //            NotificationService nService = new NotificationService(this);
    //            nService.On("BackgroundService", "BackgroundService.OnStartCommand");
    //        }
    //    });
    //    t.Start();
    //    return StartCommandResult.Sticky;
    //}

    //OnHandleIntentを追加する
    private bool _endThread = false;
    protected override void OnHandleIntent(Intent intent)
    {
        //Xamarinを有効化
        var bundle = new Bundle();
        global::Xamarin.Forms.Forms.Init(this, bundle);

        _endThread = false;

        while (true)
        {
            System.Threading.Thread.Sleep(10000);
            NotificationService nService = new NotificationService(this);
            nService.On("BackgroundService", "BackgroundService.OnStartCommand");
            break;
        }
        BootReceiver.ReleaseWakeLock();

        _endThread = true;
    }

    public void StartBackgroundService()
    {
        System.Diagnostics.Debug.WriteLine("●StartBackgroundService");
            
        //サービスを起動する
        base.StartService(this.GetServiceIntent());
    }

    public void StopBackgroundService()
    {
        System.Diagnostics.Debug.WriteLine("●StopBackgroundService");

        //サービスを停止する            
        base.StopService(this.GetServiceIntent());
    }

    private Intent GetServiceIntent()
    {
        System.Diagnostics.Debug.WriteLine("●BackgroundService.GetServiceIntent");

        //サービスを起動する
        Intent serviceIntent = new Intent(this, typeof(BackgroundService));
        if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop &&
            Build.VERSION.SdkInt <= BuildVersionCodes.LollipopMr1)
        {
            //Android5 Lollipop対応
            string packageName = this.PackageManager.GetPackageInfo(this.PackageName, 0).PackageName;
            serviceIntent.SetPackage(packageName);
            serviceIntent.SetClassName(this, packageName + ".BackgroundService");
        }
        else
        {
            serviceIntent.AddFlags(ActivityFlags.NewTask);
        }
        return serviceIntent;
    }

    public override void OnDestroy()
    {
        base.OnDestroy();

        //処理が中断された場合
        if (!_endThread)
        {
            //Killされてもサービスを再起動する。
            this.StartBackgroundService();
        }
    }
}