WINDOW_SERVICE                      WindowManager                    管理打开的窗口程序
LAYOUT_INFLATER_SERVICE             LayoutInflater                   取得xml里定义的view
ACTIVITY_SERVICE                    ActivityManager                  管理应用程序的系统状态
POWER_SERVICE                       PowerManger                      电源的服务
ALARM_SERVICE                       AlarmManager                     闹钟的服务
NOTIFICATION_SERVICE                NotificationManager              状态栏的服务
KEYGUARD_SERVICE                    KeyguardManager                  键盘锁的服务
LOCATION_SERVICE                    LocationManager                  位置的服务，如GPS
SEARCH_SERVICE                      SearchManager                    搜索的服务
VEBRATOR_SERVICE                    Vebrator                         手机震动的服务
CONNECTIVITY_SERVICE                Connectivity                     网络连接的服务
WIFI_SERVICE                        WifiManager                      Wi-Fi服务
TELEPHONY_SERVICE                   TeleponyManager                  电话服务
列出系统的所有的服务
StringBuffer serviceInfo = new StringBuffer();
final ActivityManager activityManager = (ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningServiceInfo> services = activityManager.getRunningServices(100);
Iterator<RunningServiceInfo> l = services.iterator();
while (l.hasNext()) {
RunningServiceInfo si = (RunningServiceInfo) l.next();
serviceInfo.append("pid: ").append(si.pid);
serviceInfo.append("\nprocess: ").append(si.process);
serviceInfo.append("\nservice: ").append(si.service);
serviceInfo.append("\ncrashCount: ").append(si.crashCount);
serviceInfo.append("\nclientCount: ").append(si.clientCount);
serviceInfo.append("\n\n");
开启和关闭输入法
在Android系统服务里有个InputMethodManager是用来控制输入法的:
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
 if (imm.isActive())