timertask

I am quite new to Java and I'm trying to generate a task that will run every 5 to 10 seconds, so at any interval in the area between 5 to 10, including 10. I tried several things but nothing is working so far. My latest effort is below: timer= new Timer(); Random generator = new Random(); int interval; //The task will run after 10 seconds for the first time: timer.schedule(task, 10000); //Wait for the first execution of the task to finish: try { sleep(10000); } catch(InterruptedException ex) { ex.printStackTrace(); } //Afterwards, run it every 5 to 10 seconds, until a condition becomes true:

I added this part of the code in my onCreate() method and it crashes my app. need help. LOGCAT: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. CODE: final TextView timerDisplayPanel = (TextView) findViewById(R.id.textView2); Timer t = new Timer(); t.schedule(new TimerTask(){ public void run(){ timerInt++; Log.d("timer", "timer"); timerDisplayPanel.setText("Time ="+ timerInt +"Sec"); } },10, 1000); Only the UI thread that created a view hierarchy can touch its views. You are trying to change the text of the UI

I am trying to make a simple timer using the Timer and TimerTask classes. I keep getting the following error: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.Window.findViewById(int)' on a null object reference Here is my code: package com.austinheitmann.stopwatch; import android.os.CountDownTimer; import android.os.SystemClock; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget

Hi i am creating a java desktop application where i want to show image and i want that all image should change in every 5 sec automatically i do not know how to do this here is my code public class ImageGallery extends JFrame { private ImageIcon myImage1 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\yellow.png"); private ImageIcon myImage2 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\d.jpg"); private ImageIcon myImage3 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\e.jpg"); private ImageIcon myImage4 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\f.jpg

I have a TimerTask object timerTask . My code is running but when service gets started initially, my timer task runs instantly before the specified time i.e. 3:30 PM, though I want it to run on 3:30 PM once per day only. Calendar cal = Calendar.getInstance(); cal.set(Calendar.AM_PM, Calendar.PM); cal.set(Calendar.HOUR, 3); cal.set(Calendar.MINUTE, 30); cal.set(Calendar.SECOND, 0); Date date = cal.getTime(); timer.schedule(timerTask, date, 1000*60*60*24); // once per day As other community users suggested, don't use Timertask, android has a AlarmManager that you can use. HOW? Register the alarm

I need to fetch news/event updates from the server at regular intervals like for every 20mins in my Android App. AFAIK Intent Service and Broadcast Receiver combination will be better than using Service As I am not going to communicate with the running Service. In order to fetch events at regular intervals I know 2 options 1) Using Timer Task ScheduleAtFixedRate, I am going to start IntentService, which will fetch events once & broadcast if any updates and destroy itself. After Given Interval, IntentService will be again fired by TimerTask 2) Simply starting Intent Service at the start of app

I need a timer for my program. I have written it and it works fine on PC in emulalator program (Android 1.5/2.2). But it doesn't work on the real device (Android 1.5). What am I doing wrong? TimerTask task = new TimerTask() { public void run() { if (condition) { myFunc(); } else { this.cancel(); } } }; Timer timer = new Timer(); timer.schedule(task, 500, 85); You need to cancel() timer not the timer task. 来源： https://stackoverflow.com/questions/6477608/timer-and-timertask-in-android