通过getSystemServices获取手机管理大全

getSystemService是Android很重要的一个API，它是Activity的一个方法，根据传入的NAME来取得对应的Object，然后转换成相应的服务对象。以下介绍系统相应的服务。

传入的Name	返回的对象	说明
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

Currently available names are:

WINDOW_SERVICE (“window”)

The top-level window manager in which you can place custom windows. The returned object is a WindowManager.

LAYOUT_INFLATER_SERVICE (“layout_inflater”)

A LayoutInflater for inflating layout resources in this context.

ACTIVITY_SERVICE (“activity”)

A ActivityManager for interacting with the global activity state of the system.

POWER_SERVICE (“power”)

A PowerManager for controlling power management.

ALARM_SERVICE (“alarm”)

A AlarmManager for receiving intents at the time of your choosing.

NOTIFICATION_SERVICE (“notification”)

A NotificationManager for informing the user of background events.

KEYGUARD_SERVICE (“keyguard”)

A KeyguardManager for controlling keyguard.

LOCATION_SERVICE (“location”)

A LocationManager for controlling location (e.g., GPS) updates.

SEARCH_SERVICE (“search”)

A SearchManager for handling search.

VIBRATOR_SERVICE (“vibrator”)

A Vibrator for interacting with the vibrator hardware.

CONNECTIVITY_SERVICE (“connection”)

A ConnectivityManager for handling management of network connections.

WIFI_SERVICE (“wifi”)

A WifiManager for management of Wi-Fi connectivity.

INPUT_METHOD_SERVICE (“input_method”)

An InputMethodManager for management of input methods.

UI_MODE_SERVICE (“uimode”)

An UiModeManager for controlling UI modes.

DOWNLOAD_SERVICE (“download”)

A DownloadManager for requesting HTTP downloads

*一个例子：

在android 获取手机信息的时候用到这样一段代码：**

public class BasicInfo {
public String getPhoneNumber()
{
// 获取手机号 MSISDN，很可能为空
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
StringBuffer inf = new StringBuffer();
switch(tm.getSimState()){ //getSimState()取得sim的状态  有下面6中状态
case TelephonyManager.SIM_STATE_ABSENT :inf.append("无卡");return inf.toString();
case TelephonyManager.SIM_STATE_UNKNOWN :inf.append("未知状态");return inf.toString();
case TelephonyManager.SIM_STATE_NETWORK_LOCKED :inf.append("需要NetworkPIN解锁");return inf.toString();
case TelephonyManager.SIM_STATE_PIN_REQUIRED :inf.append("需要PIN解锁");return inf.toString();
case TelephonyManager.SIM_STATE_PUK_REQUIRED :inf.append("需要PUK解锁");return inf.toString();
case TelephonyManager.SIM_STATE_READY :break;
}

String phoneNumber = tm.getLine1Number();
return phoneNumber;
}