How to use

setIsZoomInEnabled

method

in

android.widget.ZoomControls

  @Override
  public void onClick(View view) {
    mHandler.removeCallbacks(hideZoom);
    mPeriodicTableView.zoomOut();
    mZoomControls.setIsZoomInEnabled(true);
    mHandler.postDelayed(hideZoom, ZOOM_BUTTON_DELAY);
  }
});

  @Override
  public void onZoomEnd(@NonNull PeriodicTableView periodicTableView) {
    mZoomControls.setIsZoomInEnabled(periodicTableView.canZoomIn());
    mZoomControls.setIsZoomOutEnabled(periodicTableView.canZoomOut());
  }
});

@Override
void zoomOut(VncCanvasActivity activity) {
  resetMatrix();
  standardizeScaling();
  scaling -= 0.25;
  if (scaling < minimumScale)
  {
    scaling = minimumScale;
    activity.zoomer.setIsZoomOutEnabled(false);
  }
  activity.zoomer.setIsZoomInEnabled(true);
  matrix.postScale(scaling, scaling);
  //Log.v(TAG,String.format("before set matrix scrollx = %d scrolly = %d", activity.vncCanvas.getScrollX(), activity.vncCanvas.getScrollY()));
  activity.vncCanvas.setImageMatrix(matrix);
  //Log.v(TAG,String.format("after set matrix scrollx = %d scrolly = %d", activity.vncCanvas.getScrollX(), activity.vncCanvas.getScrollY()));
  resolveZoom(activity);
}

  activity.zoomer.setIsZoomOutEnabled(false);
activity.zoomer.setIsZoomInEnabled(true);
  activity.zoomer.setIsZoomInEnabled(false);

ZoomControls zoomControls = (ZoomControls) findViewById(R.id.CAMERA_ZOOM_CONTROLS);
 if(params.isZoomSupported()){    
 maxZoomLevel = params.getMaxZoom();
 zoomControls.setIsZoomInEnabled(true);
   zoomControls.setIsZoomOutEnabled(true);
   zoomControls.setOnZoomInClickListener(new OnClickListener(){
     public void onClick(View v){
         if(currentZoomLevel < MAX_ZOOM){
           currentZoomLevel++;
           camera.startSmoothZoom(currentZoomLevel);
         }
     }
   });
 zoomControls.setOnZoomOutClickListener(new OnClickListener(){
     public void onClick(View v){
         if(currentZoomLevel > 0){
           currentZoomLevel--;
           camera.startSmoothZoom(currentZoomLevel);
         }
     }
   });    
 }
 else
  zoomControls.setVisibility(View.GONE);

@Override
void zoomIn(VncCanvasActivity activity) {
  resetMatrix();
  standardizeScaling();
  scaling += 0.25;
  if (scaling > 4.0)
  {
    scaling = (float)4.0;
    activity.zoomer.setIsZoomInEnabled(false);
  }
  activity.zoomer.setIsZoomOutEnabled(false); //disable Zoomer
  matrix.postScale(scaling, scaling);
  //Log.v(TAG,String.format("before set matrix scrollx = %d scrolly = %d", activity.vncCanvas.getScrollX(), activity.vncCanvas.getScrollY()));
  activity.vncCanvas.setImageMatrix(matrix);
  resolveZoom(activity);
}

final int maxZoomLevel = params.getMaxZoom();
Log.i("max ZOOM ", "is " + maxZoomLevel);
zoomControls.setIsZoomInEnabled(true);
zoomControls.setIsZoomOutEnabled(true);

final int maxZoomLevel = params.getMaxZoom();
Log.i("max ZOOM ", "is " + maxZoomLevel);
zoomControls.setIsZoomInEnabled(true);
zoomControls.setIsZoomOutEnabled(true);

zoomControls.setIsZoomInEnabled(true);
zoomControls.setIsZoomOutEnabled(true);
zoomControls.setOnZoomInClickListener(new View.OnClickListener() {