java - Swap buttons in layout

Say I have 4 buttons. I want to have button 2 always swap out with another button, randomly. So, when the user taps button 2, it should swap with another button (randomly).

Now, button 2 is at the bottom right corner. So if the user taps button 2 again, it has the option to swap with the other three buttons. How can I achieve this?

I have already tried to make an array of the four values:

top_right, top_left, bottom_right, bottom_left

And have successfully had them swap, but it was very memory inefficient, and took a while.

Answer

I created a working demo using android's built-in buttons.

This is the main Activity class. Each button have the same onClick method buttonClicked().

List buttons = new ArrayList();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    // Store the button to the buttons array for later.
    buttons.add(findViewById(R.id.button));
    buttons.add(findViewById(R.id.button2));
    buttons.add(findViewById(R.id.button3));
    buttons.add(findViewById(R.id.button4));
}


public void buttonClicked(View v) {
    // Remove the clicked button from it's frame layout parent.

    ViewManager p = (ViewManager) v.getParent();
    p.removeView(v);

    // Find another button randomly.
    Random rng = new Random();
    View v2;
    do {
        int i = rng.nextInt(4);
        v2 = buttons.get(i);
    } while (v2 == v); // Loop until you get a different button to swap with.


    // Remove the other button from it's frame layout parent.
    ViewManager p2 = (ViewManager) v2.getParent();
    p2.removeView(v2);

    // Now simply insert each button into the other buttons frame layout.
    p.addView(v2, v2.getLayoutParams());
    p2.addView(v, v.getLayoutParams());
}

This is how the layout looks like. I have each button in a separate frame layout which stay where they are with the buttons inside swapping which frame container they are inside.

If anything is unclear just ask.