All geek questions in one place

Android - requires an application to complete tasks every second

I am trying to get my countdown application to perform its function of updating my current TextView time and date and hide it with MyOnItemSelectedListener every second so that the application is taken into account dynamically, and not just when running onCreate. If there is a more efficient method and then quickly shoot MyOnItemSelectedListener, I would appreciate criticism.

public class TheCount extends Activity { TextView description=null; TextView dates=null; TextView times=null; TextView output=null; TextView cDateDisplay=null; TextView cTimeDisplay=null; private int mYear; private int mMonth; private int mDay; private int mHour; private int mMinute; private int mSecond; CountdownHelper helper=null; String countdownId=null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.thecount); helper=new CountdownHelper(this); cTimeDisplay = (TextView)findViewById(R.id.lblCurTime); cDateDisplay = (TextView)findViewById(R.id.lblCurDate); final Calendar c = Calendar.getInstance(); mYear = c.get(Calendar.YEAR); mMonth = c.get(Calendar.MONTH); mDay = c.get(Calendar.DAY_OF_MONTH); mHour = c.get(Calendar.HOUR_OF_DAY); mMinute = c.get(Calendar.MINUTE); mSecond = c.get(Calendar.SECOND); Spinner spinner = (Spinner) findViewById(R.id.spinner1); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource( this, R.array.countoptions, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); description =(TextView)findViewById(R.id.lblDescriptFed); dates =(TextView)findViewById(R.id.lblDateFed); times =(TextView)findViewById(R.id.lblTimeFed); output =(TextView)findViewById(R.id.lblOutput); countdownId=getIntent().getStringExtra(MainActivity.ID_EXTRA); if (countdownId!=null) { load(); } spinner.setOnItemSelectedListener(new MyOnItemSelectedListener()); updateDisplay(); } private void updateDisplay() { Timer timer = new Timer(); timer.schedule(new TimerTask() { //@Override public void run() { updatedDisplay(); } },0,1000);//Update text every second } public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { if (parent.getItemAtPosition(pos).toString().equals("Normal")){ Toast.makeText(parent.getContext(), "Countdown format is " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); convertTime(); } else if (parent.getItemAtPosition(pos).toString().equals("by Days")){ Toast.makeText(parent.getContext(), "Countdown format " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); convertDays(); } else if (parent.getItemAtPosition(pos).toString().equals("by Hours")){ Toast.makeText(parent.getContext(), "Countdown format " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); convertHours(); } else if (parent.getItemAtPosition(pos).toString().equals("by Minutes")){ Toast.makeText(parent.getContext(), "Countdown format " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); convertMinutes(); } else if (parent.getItemAtPosition(pos).toString().equals("by Seconds")){ Toast.makeText(parent.getContext(), "Countdown format " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); convertSeconds(); } } public void onNothingSelected(AdapterView parent) { // Do nothing. } } private void convertTime() { String dtCountdown = dates.getText().toString() + " " + times.getText().toString(); String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString(); SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss"); try { Date date = format.parse(dtCountdown); Date dateCur = format.parse(dtCurrent); long diff = dateCur.getTime() - date.getTime(); int timeInSeconds = (int) (diff / 1000); int days, hours, minutes, seconds; days = timeInSeconds / 86400; timeInSeconds = timeInSeconds - (days * 86400); hours = timeInSeconds / 3600; timeInSeconds = timeInSeconds - (hours * 3600); minutes = timeInSeconds / 60; timeInSeconds = timeInSeconds - (minutes * 60); seconds = timeInSeconds; System.out.println(date); if(dateCur.compareTo(date)>0){ output.setText(String.valueOf(days) + " days " + String.valueOf(hours) + " hours \n" + String.valueOf(minutes) + " minutes " + String.valueOf(seconds) + " seconds ago"); } else { output.setText(String.valueOf(Math.abs(days)) + " days " + String.valueOf(Math.abs(hours)) + " hours \n" + String.valueOf(Math.abs(minutes)) + " minutes " + String.valueOf(Math.abs(seconds)) + " seconds till"); } } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void convertDays() { String dtCountdown = dates.getText().toString() + " " + times.getText().toString(); String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString(); SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy hh:mm"); try { Date date = format.parse(dtCountdown); Date dateCur = format.parse(dtCurrent); long diff = dateCur.getTime() - date.getTime(); int timeInSeconds = (int) (diff / 1000); int days; days = timeInSeconds / 86400; System.out.println(date); if(dateCur.compareTo(date)>0){ output.setText(String.valueOf(days) + " days ago"); } else { output.setText(String.valueOf(Math.abs(days)) + " days till"); } } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void convertHours() { String dtCountdown = dates.getText().toString() + " " + times.getText().toString(); String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString(); SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy hh:mm"); try { Date date = format.parse(dtCountdown); Date dateCur = format.parse(dtCurrent); long diff = dateCur.getTime() - date.getTime(); int timeInSeconds = (int) (diff / 1000); int hours; hours = timeInSeconds / 3600; System.out.println(date); if(dateCur.compareTo(date)>0){ output.setText(String.valueOf(hours) + " hours ago"); } else { output.setText(String.valueOf(Math.abs(hours)) + " hours till"); } } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void convertMinutes() { String dtCountdown = dates.getText().toString() + " " + times.getText().toString(); String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString(); SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy hh:mm"); try { Date date = format.parse(dtCountdown); Date dateCur = format.parse(dtCurrent); long diff = dateCur.getTime() - date.getTime(); int timeInSeconds = (int) (diff / 1000); int minutes; minutes = timeInSeconds / 60; System.out.println(date); if(dateCur.compareTo(date)>0){ output.setText(String.valueOf(minutes) + " minutes ago"); } else { output.setText(String.valueOf(Math.abs(minutes)) + " minutes till"); } } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void convertSeconds() { String dtCountdown = dates.getText().toString() + " " + times.getText().toString(); String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString(); SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy hh:mm"); try { Date date = format.parse(dtCountdown); Date dateCur = format.parse(dtCurrent); long diff = dateCur.getTime() - date.getTime(); int timeInSeconds = (int) (diff / 1000); int seconds; seconds = timeInSeconds; System.out.println(date); if(dateCur.compareTo(date)>0){ output.setText(String.valueOf(seconds) + " seconds ago"); } else { output.setText(String.valueOf(Math.abs(seconds)) + " seconds till"); } } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void updatedDisplay() { TextView cDateDisplay=null; TextView cTimeDisplay=null; cTimeDisplay = (TextView)findViewById(R.id.lblCurTime); cDateDisplay = (TextView)findViewById(R.id.lblCurDate); cDateDisplay.setText( new StringBuilder() // Month is 0 based so add 1 .append(mDay).append("/") .append(mMonth + 1).append("/") .append(mYear).append(" ")); cTimeDisplay.setText( new StringBuilder() .append(pad(mHour)).append(":") .append(pad(mMinute)).append(":").append(pad(mSecond))); } private static String pad(int c) { if (c >= 10) return String.valueOf(c); else return "0" + String.valueOf(c); } private void load() { Cursor c=helper.getById(countdownId); c.moveToFirst(); description.setText(helper.getDescription(c)); dates.setText(helper.getDate(c)); times.setText(helper.getTime(c) + ":00"); c.close(); } @Override public void onDestroy() { super.onDestroy(); helper.close(); }

}

@NamLe: This causes the application to crash and returns it to LogCat when onCreate () is called.

02-23 13:19:43.540: I/System.out(11667): Sun Jun 24 00:00:00 MDT 2012 02-23 13:19:44.500: W/dalvikvm(11667): threadid=11: thread exiting with uncaught exception (group=0x40a351f8) 02-23 13:19:44.510: E/AndroidRuntime(11667): FATAL EXCEPTION: Timer-0 02-23 13:19:44.510: E/AndroidRuntime(11667): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4039) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:709) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.checkForRelayout(TextView.java:6773) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.setText(TextView.java:3306) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.setText(TextView.java:3162) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.setText(TextView.java:3137) 02-23 13:19:44.510: E/AndroidRuntime(11667): at com.pixelcrunch.crunchtime.TheCount$1.run(TheCount.java:87) 02-23 13:19:44.510: E/AndroidRuntime(11667): at java.util.Timer$TimerImpl.run(Timer.java:284)

+6
source share
4 answers

Try using the UpdateDisplay function as shown below:

 private void updateDisplay() { Timer timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { Calendar c = Calendar.getInstance(); mYear = c.get(Calendar.YEAR); mMonth = c.get(Calendar.MONTH); mDay = c.get(Calendar.DAY_OF_MONTH); mHour = c.get(Calendar.HOUR_OF_DAY); mMinute = c.get(Calendar.MINUTE); mSecond = c.get(Calendar.SECOND); cDateDisplay.setText(new StringBuilder() // Month is 0 based so add 1 .append(mDay).append("/") .append(mMonth + 1).append("/") .append(mYear).append(" ")); cTimeDisplay.setText( new StringBuilder() .append(pad(mHour)).append(":") .append(pad(mMinute)).append(":").append(pad(mSecond)) ); } },0,1000);//Update text every second }

Finally, you must call the updateDisplay() function in onCreate() .
Hope this code helps you finish what you want!

+17
source

You can either use sendMessageAtTime() or postAtTime() to send yourself a message in the future and process it.

For more information.

0
source

Perhaps you can also use Timer / TimerTask to restart the operation: https://developer.android.com/reference/java/util/Timer.html

0
source

To start it in the main thread:

  new Timer().schedule(new TimerTask() { @Override public void run() { runOnUiThread(new Runnable() { @Override public void run() { yourMethodOnTheMainThread(); } }); } },0,10000);
0
source

Source: https://habr.com/ru/post/909147/

More articles:


All Articles