I need to create a schedule service in android with java. I have tried some codes , but all time after build the application it doesn't run. My logic is simple , I want to make a service to check the existence of a file in the bluetooth folder path, If this file is there , so this service will run another application , I need this with a schedule which run every 2 minutes.
Until now that's great, but now I have an error The method startActivity(Intent) is undefined for the type MyTimerTask
. I have tried this code...
public class MyTimerTask extends TimerTask {
java.io.File file = new java.io.File("/mnt/sdcard/Bluetooth/1.txt");
public void run(){
if (file.exists()) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setComponent(new ComponentName("com.package.address","com.package.address.MainActivity"));
startActivity(intent);
}
}
}
Could someone please help me with this.
There are two ways to achieve your requirement.
Alarm Manager Class
TimerTask has a method that repeats the activity on the given particular time interval. look at the following sample example.
Timer timer;
MyTimerTask timerTask;
timer = new Timer();
timerTask = new MyTimerTask();
timer.schedule ( timerTask, startingInterval, repeatingInterval );
private class MyTimerTask extends TimerTask
{
public void run()
{
...
// Repetitive Activity goes here
}
}
AlarmManager
does same thing like TimerTask
but as it occupies lesser memory to execute tasks.
public class AlarmReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
try
{
Bundle bundle = intent.getExtras();
String message = bundle.getString("alarm_message");
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{
Toast.makeText(context, "There was an error somewhere, but we still received an alarm", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
AlarmClass,
private static Intent alarmIntent = null;
private static PendingIntent pendingIntent = null;
private static AlarmManager alarmManager = null;
// OnCreate()
alarmIntent = new Intent ( null, AlarmReceiver.class );
pendingIntent = PendingIntent.getBroadcast( this.getApplicationContext(), 234324243, alarmIntent, 0 );
alarmManager = ( AlarmManager ) getSystemService( ALARM_SERVICE );
alarmManager.setRepeating( AlarmManager.RTC_WAKEUP, ( uploadInterval * 1000 ),( uploadInterval * 1000 ), pendingIntent );