Question

I am writing a program with only one button. At beginning, the button is in default color; when clicking on the button, it’s background color turns to red, and then clicking once more, its background color turns to it’s default color. Any suggestion on writing a code in myButton.setOnClickListener(new OnClickListener(){} method? Thanks

Answer 1

// Class member variable
private Drawable defaultDrawable;

myButton.setOnClickListener(new OnClickListener()
{
    if(defaultDrawable == null)
    {
        defaultDrawable = myButton.getDrawable();
        myButton.setBackgroundColor(Color.BLUE);
    }
    else
    {
        myButton.setBackgroundDrawable(defaultDrawable);
        defaultDrawable=null;
    }

}

You can definitely improve the logic to be more readable.

Also you can simply use ToggleButton, which has two states. Each state has its own background drawable/color which you can specify in xml file. No need of listener.