change color of button in alert dialog (ANDROID)

Here is how I did.

AlertDialog.Builder customBuilder = new AlertDialog.Builder(new ContextThemeWrapper(this,android.R.style.Theme_Dialog));

customBuilder.setTitle(R.string.popup_error_title);
customBuilder.setNegativeButton("Exit application", new DialogInterface.OnClickListener() {  
                public void onClick(DialogInterface dialog, int which) {  
                    MyActivity.this.finish();
                }  
        });
AlertDialog dialog = customBuilder.create();
dialog.show();

Button b = dialog.getButton(DialogInterface.BUTTON_NEGATIVE);
if(b != null)
        b.setBackgroundDrawable(getResources().getDrawable(R.drawable.my_button));

I find the drawable here

Are you referring to the neutral, positive and negative buttons? Or to buttons you included in the layout?

If you are referring to the former, then yes you can. Check out the Custom Button section in this tutorial. You basically need an XML file that will tell your button which drawable/color to use for each state change. You can then set this XML file as your button's background.

no you cant change the color or images or background of the default buttons of alert boxes. For customization you will need to make you on custom dialog box like this.

public class TryAgainAlert extends Dialog implements OnClickListener
{
    @Override
 public boolean onKeyDown(int keyCode, KeyEvent event)
 {
  if (keyCode == KeyEvent.KEYCODE_BACK)
  {   

   Intent i = new Intent(getApplicationContext(), MainMenu.class);
   finish();
   startActivity(i);

   return true;
  }
  return super.onKeyDown(keyCode, event);
 }


    TextView scores;
    Button tryagain,mainmenu,submit;


     public TryAgainAlert(Context context) {
        super(context);

        setContentView(R.layout.tryagainalert);

        scores=(TextView)findViewById(R.id.text);



        tryagain= (Button) findViewById(R.id.trya);
        mainmenu= (Button) findViewById(R.id.submitscore);
        submit= (Button) findViewById(R.id.mainmenu);

    }


    @Override
    public void onClick(View v) {
        if(v == tryagain)
        {

        else if (v==mainmenu)
        {


        }
        else if (v == submit)
        {

        }
    }

}

you can do what ever you want with the XML file. I hope it will help. Thanks