Question

Dialog dialog = new AlertDialog.Builder(Activity01.this)
                .setTitle("Login hint")
                .setMessage("Here needs your login!")
                .setPositiveButton(...)
                .setNeutralButton(...
                ).create();

What kind of grammar it is? I cannot understand why those dots are one by one? And the create() is for Builder() or for setNeutralButton()?

Thanks!

Answer 1

Builder is a static inner class of AlertDialog. Each call returns this allowing you to chain methods. Finally you call create() to create the actual dialog. This is basic Java and has little to do with Android, besides the fact that Android uses this pattern a lot.