[android] How to create a popup window (PopupWindow) in Android

I construct my own class, and then call it from my activity, overriding small methods like showAtLocation. I've found its easier when I have 4 to 5 popups in my activity to do this.

public class ToggleValues implements OnClickListener{

    private View pView;
    private LayoutInflater inflater;
    private PopupWindow pop;
    private Button one, two, three, four, five, six, seven, eight, nine, blank;
    private ImageButton eraser;
    private int selected = 1;
    private Animation appear;

    public ToggleValues(int id, Context c, int screenHeight){
        inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        pop = new PopupWindow(inflater.inflate(id, null, false), 265, (int)(screenHeight * 0.45), true);
        pop.setBackgroundDrawable(c.getResources().getDrawable(R.drawable.alpha_0));
        pView = pop.getContentView();

        appear = AnimationUtils.loadAnimation(c, R.anim.appear);

        one = (Button) pView.findViewById(R.id.one);
        one.setOnClickListener(this);
        two = (Button) pView.findViewById(R.id.two);
        two.setOnClickListener(this);
        three = (Button) pView.findViewById(R.id.three);
        three.setOnClickListener(this);
        four = (Button) pView.findViewById(R.id.four);
        four.setOnClickListener(this);
        five = (Button) pView.findViewById(R.id.five);
        five.setOnClickListener(this);
        six = (Button) pView.findViewById(R.id.six);
        six.setOnClickListener(this);
        seven = (Button) pView.findViewById(R.id.seven);
        seven.setOnClickListener(this);
        eight = (Button) pView.findViewById(R.id.eight);
        eight.setOnClickListener(this);
        nine = (Button) pView.findViewById(R.id.nine);
        nine.setOnClickListener(this);
        blank = (Button) pView.findViewById(R.id.blank_Selection);
        blank.setOnClickListener(this);
        eraser = (ImageButton) pView.findViewById(R.id.eraser);
        eraser.setOnClickListener(this);
    }

    public void showAtLocation(View v) {
        pop.showAtLocation(v, Gravity.BOTTOM | Gravity.LEFT, 40, 40);
        pView.startAnimation(appear);
    }

    public void dismiss(){ 
        pop.dismiss();
    }

    public boolean isShowing() {
        if(pop.isShowing()){
            return true;
        }else{
            return false;
        }
    }

    public int getSelected(){
        return selected;
    }

    public void onClick(View arg0) {
        if(arg0 == one){
            Sudo.setToggleNum(1);
        }else if(arg0 == two){
            Sudo.setToggleNum(2);
        }else if(arg0 == three){
            Sudo.setToggleNum(3);
        }else if(arg0 == four){
            Sudo.setToggleNum(4);
        }else if(arg0 == five){
            Sudo.setToggleNum(5);
        }else if(arg0 == six){
            Sudo.setToggleNum(6);
        }else if(arg0 == seven){
            Sudo.setToggleNum(7);
        }else if(arg0 == eight){
            Sudo.setToggleNum(8);
        }else if(arg0 == nine){
            Sudo.setToggleNum(9);
        }else if(arg0 == blank){
            Sudo.setToggleNum(0);
        }else if(arg0 == eraser){
            Sudo.setToggleNum(-1);
        }
        this.dismiss();
    }

}