android - ListView row finding incorrect View -


i have listview of plots listviewadapter has method addind data individual plot:

public void adddata(sensor sensor, float[] data) {     double[] dat = array.convertall(data, x => (double)x);     plot plot;     if (_plotmap.trygetvalue(sensor, out plot))     {         plot.adddata(dat);     } }

this method uses 'sensor' argument determine plot data for. sensor maps plot via _plotmap. _plotmap generated each row added list so:

public override view getview(int position, view convertview, viewgroup parent) {     view row = convertview;     plotview pvplot;      if (row == null) row = layoutinflater.from(_context).inflate(resource.layout.monitorplotlinelistviewrow, null, false);     pvplot = row.findviewbyid<plotview>(resource.id.pvplot);     var lineplot = new lineplot(_context, pvplot, _sensors[position], _application.xaxiswidthseconds, _panning, false, _frametime, 1000);     if (!_plotmap.containskey(_sensors[position]))        _plotmap.tryadd(_sensors[position], lineplot);      return row; }

my issue here:

pvplot = row.findviewbyid<plotview>(resource.id.pvplot);

it randomly returns plotviews, not plotview row being generated. in advance.

edit: i've watched id's activity created , result (the getview method called bunch of times during oncreate):

  1. generates row 0 -> plot has id 0, convertview 0
  2. generates row 1 -> plot has id 1, convertview 1
  3. generates row 0 -> plot has id 0, convertview 0
  4. generates row 1 -> plot has id 0, convertview 0
  5. generates row 0 -> plot has id 0, convertview 0
  6. generates row 1 -> plot has id 0, convertview 0

so whatever reason, needed change xml file. height of listview 400dp, changing match_parent fixed this. see here: https://stackoverflow.com/a/16551030/6936275


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