Android : How to save markers in a file

hello i want save my added markers (LatLng Point,name,subname,icon) in a .text file

onPause i want save all markers in markers.txt

    @Override
    public void onPause() {   
    }

onResume i want load markers.txt

    @Override
    public void onResume() {

    }

i had test with json but always have some errors

Have you any idea how to save the markers in a file with all the option "LatLngPoint-Name-SubName-Icon" ?

Can this be done?

public class MainActivity extends FragmentActivity implements
        OnMapLongClickListener {

    final int RQS_GooglePlayServices = 1;
    private GoogleMap Map;
    Location myLocation;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FragmentManager myFragmentManager = getSupportFragmentManager();
        SupportMapFragment mySupportMapFragment = (SupportMapFragment) myFragmentManager
                .findFragmentById(R.id.map);
                                
        Map = mySupportMapFragment.getMap();

        Map.setMyLocationEnabled(true);

        Map.setMapType(GoogleMap.MAP_TYPE_HYBRID);

        Map.setOnMapLongClickListener(this);

    }

   

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }




@Override    
public void onMapLongClick(LatLng point) {
    Map.addMarker(new MarkerOptions()
        .position(point)
        .title("Name")
        .snipet("SubName")
        .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));  
}

@Override
public void onPause() {   


}

@Override
public void onResume() {

}


}