Java ANDROID：在服务类内部，执行来自预定TimerTask的Toast（或状态栏通知）方法

我正试图从定期执行的定时任务中执行服务中的{public void}方法

此时间任务定期检查一个条件。如果为true，则通过{className}.{methodName}调用方法

但是，正如Java所要求的，如果我想将{className}与{.dot}一起使用，那么该方法需要是{pubic static}方法

问题是此方法用于使用ToastAndroid弹出通知和状态栏进行通知 要使用这些通知，必须使用

Context context = getApplicationContext();

但要使其工作，该方法必须不具有{static}修饰符，并且驻留在服务类中

所以，基本上，我希望后台服务从计划的TimerTask评估条件，并在服务类中执行一个方法

有谁能帮助我使用服务的正确方式是什么，在循环评估时，在满足特定条件时调用方法

以下是实际的代码行：

TimerTask类WatchClipboard.java：

服务类FetchService.java：如果我将修饰符更改为static，{Context}相关的问题就会出现

public class FetchService extends Service {
    public static final String TAG = "WordUp";  //for Logcat filtering


    //DECLARATION
    private static Timer runningTimer;
    private static final boolean THIS_IS_DAEMON = true;

    private static WatchClipboard watchClipboard;
    private static final long DELAY = 0;
    private static final long PERIOD = 100;

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onCreate() {    Log.v(WordUp.TAG, "FetchService.onCreate()");
        super.onCreate();

        //TESTING SERVICE RUNNING
        watchClipboard = new WatchClipboard();
        runningTimer = new Timer("runningTimer", THIS_IS_DAEMON);
        runningTimer.schedule(watchClipboard, DELAY, PERIOD);
    }

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

        runningTimer.cancel();

        stopSelf(); Log.v(WordUp.TAG, "FetchService.onCreate().stopSelf()");
    }

    public void instantNotification() {   //If I change the modifier to static, {Context} related problems occur
        Context context = getApplicationContext();  // application Context

        //use Toast notification: Need to accept user interaction, and change the duration of show
        Toast toast = Toast.makeText(context, WordUp.newCopied+": "+WordUp.newDefinition, Toast.LENGTH_LONG);
        toast.show();

        //use Status notification: need to automatically expand to show lines of definitions
        NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        int icon = R.drawable.icon;        // icon from resources
        CharSequence tickerText = WordUp.newCopied; // ticker-text
        long when = System.currentTimeMillis(); // notification time
        CharSequence contentTitle = WordUp.newCopied;   //expanded message title
        CharSequence contentText = WordUp.newDefinition;    //expanded message text

        Intent notificationIntent = new Intent(this, WordUp.class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

        // the next two lines initialize the Notification, using the configurations above
        Notification notification = new Notification(icon, tickerText, when);
        notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);

        mNotificationManager.notify(WordUp.WORDUP_STATUS, notification);
    }
}

---

找到了简单的解决方案。这毕竟是一个微不足道的问题

在方法外部声明有问题的数据成员，如{Content}和{Intent} 并将其修改为静态解决了问题

我不明白为什么我没有想出这个简单的解决办法

public class FetchService extends Service {
    public static final String TAG = "WordUp";  //for Logcat filtering


    //DECLARATION
    private static Timer runningTimer;
    private static final boolean THIS_IS_DAEMON = true;

    private static WatchClipboard watchClipboard;
    private static final long DELAY = 0;
    private static final long PERIOD = 100;

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onCreate() {    Log.v(WordUp.TAG, "FetchService.onCreate()");
        super.onCreate();

        //TESTING SERVICE RUNNING
        watchClipboard = new WatchClipboard();
        runningTimer = new Timer("runningTimer", THIS_IS_DAEMON);
        runningTimer.schedule(watchClipboard, DELAY, PERIOD);
    }

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

        runningTimer.cancel();

        stopSelf(); Log.v(WordUp.TAG, "FetchService.onCreate().stopSelf()");
    }

    public void instantNotification() {   //If I change the modifier to static, {Context} related problems occur
        Context context = getApplicationContext();  // application Context

        //use Toast notification: Need to accept user interaction, and change the duration of show
        Toast toast = Toast.makeText(context, WordUp.newCopied+": "+WordUp.newDefinition, Toast.LENGTH_LONG);
        toast.show();

        //use Status notification: need to automatically expand to show lines of definitions
        NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        int icon = R.drawable.icon;        // icon from resources
        CharSequence tickerText = WordUp.newCopied; // ticker-text
        long when = System.currentTimeMillis(); // notification time
        CharSequence contentTitle = WordUp.newCopied;   //expanded message title
        CharSequence contentText = WordUp.newDefinition;    //expanded message text

        Intent notificationIntent = new Intent(this, WordUp.class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

        // the next two lines initialize the Notification, using the configurations above
        Notification notification = new Notification(icon, tickerText, when);
        notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);

        mNotificationManager.notify(WordUp.WORDUP_STATUS, notification);
    }
}