As the customer says in the forums, the ChartMouseListener events don't work with ZoomStyle.INCHART_MULTI in TeeChart Java Android.

Here a simple example:

  private int myBackgroundCount = 0;
  private int myTitleCount = 0;
  private int myLegendCount = 0;
  private int myAxesCount = 0;

  private void initializeChart() {
    tChart1.getAspect().setView3D(false);

    Line line1 = new Line(tChart1.getChart());
    line1.fillSampleValues();
    tChart1.getZoom().setZoomStyle(ZoomStyle.INCHART_MULTI);
		
    tChart1.addChartMouseListener(new ChartMouseListener() {
	         
      @Override
      public void titleClicked(ChartMouseEvent arg0) {
        myTitleCount++;
        tChart1.getHeader().setText("Title Clicked: " + String.valueOf(myTitleCount) + " times");
      }
	         
      @Override
      public void legendClicked(ChartMouseEvent arg0) {
        myLegendCount++;
        tChart1.getHeader().setText("Legend Clicked: " + String.valueOf(myLegendCount) + " times");
      }
	         
      @Override
      public void backgroundClicked(ChartMouseEvent arg0) {
        myBackgroundCount++;
        tChart1.getHeader().setText("BackGround Clicked: " + String.valueOf(myBackgroundCount) + " times");
      }
	         
      @Override
      public void axesClicked(ChartMouseEvent arg0) {
        myAxesCount++;
        tChart1.getHeader().setText("Axes Clicked: " + String.valueOf(myAxesCount) + " times");
      }
    } );
  }