Click-Event-and-Listener.md

@@ -70,4 +70,15 @@ Get the states of BMB by:
 ```
 bmb.isBoomed();    // Whether the BMB is boomed.
 bmb.isReBoomed();  // Whether the BMB is re-boomed.
-```
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+```
+
+###Re-boom BMB When Back-Button is Clicked
+BMB will re-boom when it's boomed and back-button is clicked. If you don't want this happen:
+```
+bmb.setBackPressListened(false);
+```
+Or in xml:
+```
+app:bmb_backPressListened="false"
+```
+Notice that BMB will `requestFocus` when it's going to boom. So if you need to take the focus back, you should use `requestFocus` for your own view.
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