当所有其他按钮被禁用时，如何启用某些按钮？

Question

I have 16 buttons in my game activity. Plus 4 (I will talk about them later), all 4 disabled at this point. Now, whenever a user click on one of those 16 buttons, I set some text to it and then disable it, so it cannot be used again. Is there a way, when all 16 buttons are clicked and disabled, to enable all of those 4 buttons?

Answer 1

Here is a quick way to do it:

public class example{
    int activeButtons = 16;

    public void onCreate(Bundle savedInstanceState){
        //initialize
    }

    /**
    * This is your onClick method
    */
    public void click(View v){
        v.setEnabled(false);
        activeButtons--;
        if(activeButtons == 0){
            enable();
        }
    }

    /**
    * This will enable your four buttons
    */
    public void enable(){
        //Get references to your buttons here
        Button b1 = ...;
        Button b2 = ...;
        Button b3 = ...;
        Button b4 = ...;

        b1.setEnabled(true);
        b2.setEnabled(true);
        b3.setEnabled(true);
        b4.setEnabled(true);
   }
}

Answer 2

An example of one way to accomplish what you are asking is simply to set aside a case such as this in your code; if I understand what your question is in regards to what has been posted above:

Button buttonOne = null;
//...fourteen buttons
Button otherButtonOne = null;
//...other four buttons

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setupButtons();
}

private void setupButtons()
{
    buttonOne.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            //..Whatever else you do with button.
            if(allButtonsAreDisabled())
            {
                enableOtherFourButtons();
            }
        }
    });
    //...
}

private boolean allButtonsAreDisabled()
{
    if(!buttonOne.isEnabled()) // && !buttonTwo.isEnabled() && ...
    {
        return true;
    }
    else
        return false;
}

private void enableOtherFourButtons()
{
    otherButtonOne.setEnabled(true);
    //...
}