这几个“按键”的触发，都会产生一个 Action == Intent.ACTION_CLOSE_SYSTEM_DIALOGS 的通知区分他们三个的不同事件的参数，就是随着  Intent 带过来的  reason 字符串，分别对应：

"电源键长按"（globalscreen）

"Home键"（homekey）

"Home键长按"（recentapps）

 import android.app.Activity;    import android.content.BroadcastReceiver;    import android.content.Context;    import android.content.Intent;    import android.content.IntentFilter;    import android.os.Bundle;        public class MainActivity extends Activity {                private MyBroadCastReceiver myBroadCastReceiver;                @Override        protected void onCreate(Bundle savedInstanceState) {            // TODO Auto-generated method stub            super.onCreate(savedInstanceState);                                    myBroadCastReceiver = new MyBroadCastReceiver();                    }        @Override        protected void onResume() {            // TODO Auto-generated method stub            super.onResume();            IntentFilter intentFilter = new IntentFilter();            intentFilter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);                        System.out.println("I'm coming, myBroadCastReceiver注册了!");            registerReceiver(myBroadCastReceiver, intentFilter);        }        private class MyBroadCastReceiver extends BroadcastReceiver{                @Override            public void onReceive(Context context, Intent intent) {                //你自己先把 reasons == homekey 和 长按homekey 排除，剩下的做下面的处理                String reason = intent.getStringExtra("reason");                if (intent.getAction().equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)){                    System.out.println("Intent.ACTION_CLOSE_SYSTEM_DIALOGS : " + intent.getStringExtra("reason"));                                        if (intent.getExtras()!=null && intent.getExtras().getBoolean("myReason")){                        myBroadCastReceiver.abortBroadcast();                    }else if (reason != null){                                                if (reason.equalsIgnoreCase("globalactions")){                                                        //屏蔽电源长按键的方法：                            Intent myIntent = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);                            myIntent.putExtra("myReason", true);                            context.sendOrderedBroadcast(myIntent, null);                            System.out.println("电源  键被长按");                                                    }else if (reason.equalsIgnoreCase("homekey")){                                                        //屏蔽Home键的方法                            //在这里做一些你自己想要的操作,比如重新打开自己的锁屏程序界面，这样子就不会消失了                            System.out.println("Home 键被触发");                                                    }else if (reason.equalsIgnoreCase("recentapps")){                                                        //屏蔽Home键长按的方法                            System.out.println("Home 键被长按");                        }                    }                }            }                    }                @Override        protected void onPause() {            // TODO Auto-generated method stub            super.onPause();                        System.out.println("I get out, myBroadCastReceiver注销了!");            unregisterReceiver(myBroadCastReceiver);        }    }