public void show(final Runnable positive) {
        setNegativeButton(null);
        showInternal(positive, null);
    }
Use this method to create and display a simple 'show message' dialog using the data defined before using this classes' setters
<p>
A show dialog just shows a message, only the positive button is shown (but does not need to have an action)
Provide an optional listener to define actions for 'positive' button.
main/src/main/java/cgeo/geocaching/ui/dialog/SimpleDialog.java