ANDROID: inside Service class, executing a method for Toast (or Status Bar notification) from schedu
- by Peter SHINe ???
I am trying to execute a {public void} method in Service, from scheduled TimerTask which is periodically executing.
This TimerTask periodically checks a condition. If it's true, it calls method via {className}.{methodName};
However, as Java requires, the method needs to be {pubic static} method, if I want to use {className} with {.dot}
The problem is this method is for notification using Toast(Android pop-up notification) and Status Bar
To use these notifications, one must use
Context context = getApplicationContext();
But for this to work, the method must not have {static} modifier and resides in Service class.
So, basically, I want background Service to evaluate condition from scheduled TimerTask, and execute a method in Service class.
Can anyone help me what's the right way to use Service, invoking a method when certain condition is satisfied while looping evaluation?
Here are the actually lines of codes:
The TimerTask class (WatchClipboard.java) :
public class WatchClipboard extends TimerTask {
//DECLARATION
private static GetDefinition getDefinition = new GetDefinition();
@Override
public void run() {
if (WordUp.clipboard.hasText()) {
WordUp.newCopied = WordUp.clipboard.getText().toString().trim().toLowerCase();
if (!(WordUp.currentCopied.equals(WordUp.newCopied))) {
WordUp.currentCopied = WordUp.newCopied; Log.v(WordUp.TAG, WordUp.currentCopied);
getDefinition.apiCall_Wordnik();
FetchService.instantNotification(); //it requires this method to have {static} modifier, if I want call in this way.
}
}
}
}
And the Service class (FetchService.java) : If I change the modifier to static, {Context} related problems occur
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);
}
}
