Using Handler to set Visibile/Invisibile a maker










5















I'm working with the google map for a project. I'm using an handler to set the marker visible o invisibile.
If the zoom of the camera is over the a number I have to set the marker invisible or if the zoom is lower than a number I have to set the marker Invisible. I'm using an ArrayList to save all the markers.



I need to create a timer that will continue to work until the application is closed



My problem is that the handler doesn't start.
Below there is my code:



final Handler handler = new Handler();
Runnable run = new Runnable()
@Override
public void run()

if (mMap.getCameraPosition().zoom > zoomLevel)

for (int j = 0; j < players.size(); j++)
Marker removeMarker = players.get(j).marker;
removeMarker.setVisible(false);

else

for (int j = 0; j < players.size(); j++)
Marker removeMarker = players.get(j).marker;
removeMarker.setVisible(true);



handler.postDelayed(run, 1000);

;









share|improve this question




























    5















    I'm working with the google map for a project. I'm using an handler to set the marker visible o invisibile.
    If the zoom of the camera is over the a number I have to set the marker invisible or if the zoom is lower than a number I have to set the marker Invisible. I'm using an ArrayList to save all the markers.



    I need to create a timer that will continue to work until the application is closed



    My problem is that the handler doesn't start.
    Below there is my code:



    final Handler handler = new Handler();
    Runnable run = new Runnable()
    @Override
    public void run()

    if (mMap.getCameraPosition().zoom > zoomLevel)

    for (int j = 0; j < players.size(); j++)
    Marker removeMarker = players.get(j).marker;
    removeMarker.setVisible(false);

    else

    for (int j = 0; j < players.size(); j++)
    Marker removeMarker = players.get(j).marker;
    removeMarker.setVisible(true);



    handler.postDelayed(run, 1000);

    ;









    share|improve this question


























      5












      5








      5








      I'm working with the google map for a project. I'm using an handler to set the marker visible o invisibile.
      If the zoom of the camera is over the a number I have to set the marker invisible or if the zoom is lower than a number I have to set the marker Invisible. I'm using an ArrayList to save all the markers.



      I need to create a timer that will continue to work until the application is closed



      My problem is that the handler doesn't start.
      Below there is my code:



      final Handler handler = new Handler();
      Runnable run = new Runnable()
      @Override
      public void run()

      if (mMap.getCameraPosition().zoom > zoomLevel)

      for (int j = 0; j < players.size(); j++)
      Marker removeMarker = players.get(j).marker;
      removeMarker.setVisible(false);

      else

      for (int j = 0; j < players.size(); j++)
      Marker removeMarker = players.get(j).marker;
      removeMarker.setVisible(true);



      handler.postDelayed(run, 1000);

      ;









      share|improve this question
















      I'm working with the google map for a project. I'm using an handler to set the marker visible o invisibile.
      If the zoom of the camera is over the a number I have to set the marker invisible or if the zoom is lower than a number I have to set the marker Invisible. I'm using an ArrayList to save all the markers.



      I need to create a timer that will continue to work until the application is closed



      My problem is that the handler doesn't start.
      Below there is my code:



      final Handler handler = new Handler();
      Runnable run = new Runnable()
      @Override
      public void run()

      if (mMap.getCameraPosition().zoom > zoomLevel)

      for (int j = 0; j < players.size(); j++)
      Marker removeMarker = players.get(j).marker;
      removeMarker.setVisible(false);

      else

      for (int j = 0; j < players.size(); j++)
      Marker removeMarker = players.get(j).marker;
      removeMarker.setVisible(true);



      handler.postDelayed(run, 1000);

      ;






      android






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 15 '18 at 17:35







      Gioele.sandrin

















      asked Nov 15 '18 at 17:30









      Gioele.sandrinGioele.sandrin

      945




      945






















          1 Answer
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          this handler.postDelayed(run, 1000); needs to be outside of the runnable body



          final Handler handler = new Handler();
          Runnable run = new Runnable()
          @Override
          public void run()

          if (mMap.getCameraPosition().zoom > zoomLevel)

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(false);

          else

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(true);



          ;
          handler.postDelayed(run, 1000);





          share|improve this answer























          • what's the error?

            – Nikos Hidalgo
            Nov 15 '18 at 17:40











          • Cannot resolve simbol postDelayed.

            – Gioele.sandrin
            Nov 15 '18 at 17:42











          • try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

            – Nikos Hidalgo
            Nov 15 '18 at 17:45











          • the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

            – Gioele.sandrin
            Nov 15 '18 at 17:47












          • that's what postDelayed does.

            – Nikos Hidalgo
            Nov 15 '18 at 17:52










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          1 Answer
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          1 Answer
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          active

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          this handler.postDelayed(run, 1000); needs to be outside of the runnable body



          final Handler handler = new Handler();
          Runnable run = new Runnable()
          @Override
          public void run()

          if (mMap.getCameraPosition().zoom > zoomLevel)

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(false);

          else

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(true);



          ;
          handler.postDelayed(run, 1000);





          share|improve this answer























          • what's the error?

            – Nikos Hidalgo
            Nov 15 '18 at 17:40











          • Cannot resolve simbol postDelayed.

            – Gioele.sandrin
            Nov 15 '18 at 17:42











          • try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

            – Nikos Hidalgo
            Nov 15 '18 at 17:45











          • the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

            – Gioele.sandrin
            Nov 15 '18 at 17:47












          • that's what postDelayed does.

            – Nikos Hidalgo
            Nov 15 '18 at 17:52















          0














          this handler.postDelayed(run, 1000); needs to be outside of the runnable body



          final Handler handler = new Handler();
          Runnable run = new Runnable()
          @Override
          public void run()

          if (mMap.getCameraPosition().zoom > zoomLevel)

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(false);

          else

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(true);



          ;
          handler.postDelayed(run, 1000);





          share|improve this answer























          • what's the error?

            – Nikos Hidalgo
            Nov 15 '18 at 17:40











          • Cannot resolve simbol postDelayed.

            – Gioele.sandrin
            Nov 15 '18 at 17:42











          • try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

            – Nikos Hidalgo
            Nov 15 '18 at 17:45











          • the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

            – Gioele.sandrin
            Nov 15 '18 at 17:47












          • that's what postDelayed does.

            – Nikos Hidalgo
            Nov 15 '18 at 17:52













          0












          0








          0







          this handler.postDelayed(run, 1000); needs to be outside of the runnable body



          final Handler handler = new Handler();
          Runnable run = new Runnable()
          @Override
          public void run()

          if (mMap.getCameraPosition().zoom > zoomLevel)

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(false);

          else

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(true);



          ;
          handler.postDelayed(run, 1000);





          share|improve this answer













          this handler.postDelayed(run, 1000); needs to be outside of the runnable body



          final Handler handler = new Handler();
          Runnable run = new Runnable()
          @Override
          public void run()

          if (mMap.getCameraPosition().zoom > zoomLevel)

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(false);

          else

          for (int j = 0; j < players.size(); j++)
          Marker removeMarker = players.get(j).marker;
          removeMarker.setVisible(true);



          ;
          handler.postDelayed(run, 1000);






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 15 '18 at 17:35









          Nikos HidalgoNikos Hidalgo

          1,0961317




          1,0961317












          • what's the error?

            – Nikos Hidalgo
            Nov 15 '18 at 17:40











          • Cannot resolve simbol postDelayed.

            – Gioele.sandrin
            Nov 15 '18 at 17:42











          • try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

            – Nikos Hidalgo
            Nov 15 '18 at 17:45











          • the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

            – Gioele.sandrin
            Nov 15 '18 at 17:47












          • that's what postDelayed does.

            – Nikos Hidalgo
            Nov 15 '18 at 17:52

















          • what's the error?

            – Nikos Hidalgo
            Nov 15 '18 at 17:40











          • Cannot resolve simbol postDelayed.

            – Gioele.sandrin
            Nov 15 '18 at 17:42











          • try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

            – Nikos Hidalgo
            Nov 15 '18 at 17:45











          • the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

            – Gioele.sandrin
            Nov 15 '18 at 17:47












          • that's what postDelayed does.

            – Nikos Hidalgo
            Nov 15 '18 at 17:52
















          what's the error?

          – Nikos Hidalgo
          Nov 15 '18 at 17:40





          what's the error?

          – Nikos Hidalgo
          Nov 15 '18 at 17:40













          Cannot resolve simbol postDelayed.

          – Gioele.sandrin
          Nov 15 '18 at 17:42





          Cannot resolve simbol postDelayed.

          – Gioele.sandrin
          Nov 15 '18 at 17:42













          try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

          – Nikos Hidalgo
          Nov 15 '18 at 17:45





          try adding the line handler.postDelayed(run, 1000); in the same scope as the one where the handler is defined, but outside of the runnable.

          – Nikos Hidalgo
          Nov 15 '18 at 17:45













          the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

          – Gioele.sandrin
          Nov 15 '18 at 17:47






          the handler it's not in a function, I need to create a timer that start when I open the application and every second do the istructions within it

          – Gioele.sandrin
          Nov 15 '18 at 17:47














          that's what postDelayed does.

          – Nikos Hidalgo
          Nov 15 '18 at 17:52





          that's what postDelayed does.

          – Nikos Hidalgo
          Nov 15 '18 at 17:52



















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