可以建立对象把Application.ActivityLifecycleCallbacks接口中的函数实现，并利用public void registerActivityLifecycleCallbacks (Application.ActivityLifecycleCallbacks callback)函数向application添加代理对象。

 @Override    public void onActivityResumed(Activity arg0) {        System.out.println("onActivityResumed...................");        System.out.println("~~~~~~~~~~~~test activity is "+arg0.getClass());        if( arg0.getClass() == PasscodeUnlockActivity.class )            return;        System.out.println("onActivityResumed.........111111..........");       if(  ( this.appLockDisabledActivities != null ) && Arrays.asList(this.appLockDisabledActivities).contains( arg0.getClass().getName() ) )           return;        System.out.println("onActivityResumed........22222...........");        if(mustShowUnlockSceen()) {            //uhhh ohhh!            System.out.println("show lock........4444..........");            Intent i = new Intent(arg0.getApplicationContext(), PasscodeUnlockActivity.class);            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            arg0.getApplication().startActivity(i);            return;        }    }