Android lets own app capture processing system keys home key and Power key

The home Key,power Key in Android responds by default to the framework of the system, what if you want your app to capture a response?

Home Key relatively simple, does not involve the system source code modification:

1. Add the following line to the OnCreate method of the main Activity in this app:

<span style= "FONT-SIZE:14PX;" >getwindow (). SetFlags (flag_homekey_dispatched, flag_homekey_dispatched);</span>

2. Override this main Activity's OnKeyDown () method to implement the Home key Processing section, andultimately

return true;

Power Key a little more trouble, to modify the source code:

1: Modify the Interceptkeybeforequeueing method of Phonewindowmanager.java, add the following code after reference line

Case Keyevent.keycode_power: {//reference lineresult &= ~action_pass_to_user;//reference line//add Beginactivitymanager Activitymanager = (activitymanager) getsystemservice (Context.activity_service); Try{if ( Activitymanager.getrunningtasks (1). Get (0). Topactivity.getpackagename (). Equals ("Your_special_package_name")) {// Please reset the special package Name.result |= Action_pass_to_user; XLOG.D (TAG, "Detect power key in special package, pass to User!")}} catch (NullPointerException e) {xlog.d (TAG, "Ingore a nullpointerexception.."); Add End

2: Also within this branch, find the Else statement segment and find the following location to join

if (Interceptpowerkeyup (canceled | | mpendingpowerkeyupcanceled)) {//reference line if (! ( (result& action_pass_to_user) = = Action_pass_to_user)) {//join line result = (Result & ~action_wake_up) | Action_go_to_sleep; Legacy Code}}//join line

Reprint Please specify source: Zhou Mushi's csdn blog Http://blog.csdn.net/zhoumushui

My github: Zhou Mushi's GitHub Https://github.com/zhoumushui

Android lets own app capture processing system keys home key and Power key