title: aChartEngine, GraphicalView OnClickListener not working
body: <p>I'm new to android and am using aChartEngine to create a bar chart. I want to capture the x and y values when a user clicks on the chart. I have looked at the demos from aChartEngine and have my chart creating fine. However the onClickListner does not work when I click on the graphy. I have defined the listener in the OnResume method but it doesn't work. Any ideas would be greatly appreciated. Am I missing something here?</p>
  
  <p>Here is my OnResume method which is taken from XYChartBuilder</p>
  
  <pre><code>@Override
  protected void onResume() {
    super.onResume();
  Toast.makeText(Clickable2.this, "In OnResume", Toast.LENGTH_SHORT).show();
  
    if (mChartView == null) {     
  
  Toast.makeText(Clickable2.this, "mChartView is null", Toast.LENGTH_SHORT).show();      
  
      LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
      mChartView = ChartFactory.getBarChartView(this,mDatasetMethod(titles,x,values),renderer,Type.DEFAULT);
      renderer.setClickEnabled(true);
      renderer.setSelectableBuffer(100);
  
      //OnClickListener
      mChartView.setOnClickListener(new View.OnClickListener() {
       // @Override
        public void onClick(View v) {
   Toast.makeText(Clickable2.this, "ON CLICK", Toast.LENGTH_SHORT).show();              
          SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
          double[] xy = mChartView.toRealPoint(0);
          if (seriesSelection == null) {
            Toast.makeText(Clickable2.this, "No chart element was clicked", Toast.LENGTH_SHORT)
                .show();
          } else {
            Toast.makeText(
                    Clickable2.this,
                "Chart element in series index " + seriesSelection.getSeriesIndex()
                    + " data point index " + seriesSelection.getPointIndex() + " was clicked"
                    + " closest point value X=" + seriesSelection.getXValue() + ", Y=" + seriesSelection.getValue()
                    + " clicked point value X=" + (float) xy[0] + ", Y=" + (float) xy[1], Toast.LENGTH_SHORT).show();
          }
        }
      });
  
      //LongClickListener
      mChartView.setOnLongClickListener(new View.OnLongClickListener() {
      //  @Override
        public boolean onLongClick(View v) {
          SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
    Toast.makeText(Clickable2.this, "ON LONG CLICK", Toast.LENGTH_SHORT).show();   
          if (seriesSelection == null) {
            Toast.makeText(Clickable2.this, "No chart element was long pressed",
                Toast.LENGTH_SHORT);
            return false; // no chart element was long pressed, so let something
            // else handle the event
          } else {
            Toast.makeText(Clickable2.this, "Chart element in series index "
                + seriesSelection.getSeriesIndex() + " data point index "
                + seriesSelection.getPointIndex() + " was long pressed", Toast.LENGTH_SHORT);
            return true; // the element was long pressed - the event has been
            // handled
          }
        }
      });
  
      mChartView.addZoomListener(new ZoomListener() {
        public void zoomApplied(ZoomEvent e) {
          String type = "out";
          if (e.isZoomIn()) {
            type = "in";
          }
          System.out.println("Zoom " + type + " rate " + e.getZoomRate());
        }
  
        public void zoomReset() {
          System.out.println("Reset");
        }
      }, true, true);
  
      mChartView.addPanListener(new PanListener() {
        public void panApplied() {
          System.out.println("New X range=[" + renderer.getXAxisMin() + ", " + renderer.getXAxisMax()
              + "], Y range=[" + renderer.getYAxisMax() + ", " + renderer.getYAxisMax() + "]");
        }
      });
  
      layout.addView(mChartView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
      boolean enabled = mDataset.getSeriesCount() &gt; 0;
    } else {
      mChartView.repaint();
   Toast.makeText(Clickable2.this, "mChartView is NOT null", Toast.LENGTH_SHORT).show();  
    }
  } 
  </code></pre>