While speedily clicking on item of gridview, same method has been called twice a time

I have used grid view in my project. When I click on grid view item speedily, it calls the same method twice a time. But I slowly click, then it works perfectly.

In method below I call the dialog box. When I click the item it opens the dialog box but when I speedily click the item then dialog box open two times. What should I do to solve this?

grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, final View view, final int position, long id) {
        showDialog(position);
    }
});

I have solution for opening twice time method. I can define the below condition through solved it:

grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    private long mLastClickTime = 0;

    public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {
        if (SystemClock.elapsedRealtime() - mLastClickTime < 1000) return;

        mLastClickTime = SystemClock.elapsedRealtime();
        grideProductAdd(position);          
    }
});