1 package com.android.mail.ui;
2 
3 public interface UpOrBackController {
4 
5     interface UpOrBackHandler {
onBackPressed()6         boolean onBackPressed();
onUpPressed()7         boolean onUpPressed();
8     }
9 
addUpOrBackHandler(UpOrBackHandler handler)10     void addUpOrBackHandler(UpOrBackHandler handler);
removeUpOrBackHandler(UpOrBackHandler handler)11     void removeUpOrBackHandler(UpOrBackHandler handler);
12 }
13