Android Checkbox listener method is called right after the screen rotation

Question

I'm starting to program android app and I'm having a problem with a checkbox.

I've got a checkbox in my activity, i put a log message in the OnCheckedChanged method to be launched when the checkbox is checked, but when I rotate the screen the message appears again as if the OnCheckedChanged method was call automatically when the system destroys and creates the activity again.

What is happening?? thanks.

Answer 1

The best and cleanest solution I have used multiple times is to check if View.isPressed(). This makes sense since the user will be pressing on the Switch when it triggers the callback.

private Switch.OnCheckedChangeListener mOnSwitch = new Switch.OnCheckedChangeListener()
{
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
    {
        if (!buttonView.isPressed())
        {
            // Not from user!
            return;
        }

        // Handle user check change
    }
};

Answer 2

I have been gone through such problem once. it was so frustrating finally i remove OnCheckedChangedListener and replace it with onClickListener. In onclick methode i use c.IsChecked().

My guess is that android call onCheckChange whenever checkbox state is changed either by user of through code (by c.setchecked(boolean)),

In your case c.setchecked(boolean) methode called internally by android to restore UI state.

Hope it will help.