TelephonyManager提供了取得手机基本服务的信息的一种方式。因此应用程序可以使用TelephonyManager来探测手机基本服务的情况。
应用程序也可以注册listener来监听电话状态的改变。
我们不能对TelephonyManager进行实例化，只能通过如下的形式得到对其实例的引用：
Context.getSystemService(Context.TELEPHONY_SERVICE).
注意：对手机的某些信息进行读取是需要一定许可（permission）的。
可以通过在manifest file中添加一定的许可（permission），以便来对对手机的某些信息进行读取。
本文源码下载： 具体下载目录在 /pub/Android源码集锦/2011年/12月/Android教程：获取设备的基本服务信息/
先是Java代码
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); StringBuilder sb = new StringBuilder(); sb.append("\nDeviceId(IMEI) = " + tm.getDeviceId()); sb.append("\nDeviceSoftwareVersion = " + tm.getDeviceSoftwareVersion()); sb.append("\nLine1Number = " + tm.getLine1Number()); sb.append("\nNetworkCountryIso = " + tm.getNetworkCountryIso()); sb.append("\nNetworkOperator = " + tm.getNetworkOperator()); sb.append("\nNetworkOperatorName = " + tm.getNetworkOperatorName()); sb.append("\nNetworkType = " + tm.getNetworkType()); sb.append("\nPhoneType = " + tm.getPhoneType()); sb.append("\nSimCountryIso = " + tm.getSimCountryIso()); sb.append("\nSimOperator = " + tm.getSimOperator()); sb.append("\nSimOperatorName = " + tm.getSimOperatorName()); sb.append("\nSimSerialNumber = " + tm.getSimSerialNumber()); sb.append("\nSimState = " + tm.getSimState()); sb.append("\nSubscriberId(IMSI) = " + tm.getSubscriberId()); sb.append("\nVoiceMailNumber = " + tm.getVoiceMailNumber()); Log.e("info", sb.toString());
然后是Manifest.xml中的权限代码<uses-permission android:name="android.permission.READ_PHONE_STATE" />
我们把获得的内容信息展示到屏幕上，方便阅览。
由于我在家中是用的虚拟机，因此一些信息无法正常显示，先呈上一个虚拟机运行的效果图，实机的会过几天补上。
主要静态成员常量：
手机的通话状态：（它们对应PhoneStateListener.LISTEN_CALL_STATE）
int CALL_STATE_IDLE Device call state: No activity.
Device call state: No activity.
空闲。没有任何活动。
int CALL_STATE_OFFHOOK Device call state: Off-hook.
Device call state: Off-hook. At least one call exists that is dialing, active, or on hold, and no calls are ringing or waiting.
摘机状态。至少有个电话活动。该活动或是拨打（dialing）或是通话，或是 on hold。并且没有电话是ringing or waiting
注：on hold的意思是暂时挂起。比如在进行通话A的时候，来了个新的电话B，我们暂时挂起通话A，等通话B结束了，才继续进行A的通话。
int CALL_STATE_RINGING Device call state: Ringing.
Device call state: Ringing. A new call arrived and is ringing or waiting. In the latter case, another call is already active.
来电。来电，电话铃声响起的那段时间或正在通话又来新电，新来电话不得不等待的那段时间。
数据连接活动状态（它们对应PhoneStateListener.LISTEN_DATA_ACTIVITY）
int DATA_ACTIVITY_DORMANT
Data connection is active, but physical link is down
int DATA_ACTIVITY_IN
Data connection activity: Currently receiving IP PPP traffic.
int DATA_ACTIVITY_INOUT
Data connection activity: Currently both sending and receiving IP PPP traffic.
int DATA_ACTIVITY_NONE
Data connection activity: No traffic.
int DATA_ACTIVITY_OUT
Data connection activity: Currently sending IP PPP traffic.
数据连接状态（它们对应PhoneStateListener.LISTEN_DATA_CONNECTION_STATE ）
int DATA_CONNECTED
Data connection state: Connected.
int DATA_CONNECTING
Data connection state: Currently setting up a data connection.
int DATA_DISCONNECTED
Data connection state: Disconnected.
int DATA_SUSPENDED
Data connection state: Suspended.
数据传送的网络类型
int NETWORK_TYPE_1xRTT
Current network is 1xRTT
int NETWORK_TYPE_CDMA
Current network is CDMA: Either IS95A or IS95B
int NETWORK_TYPE_EDGE
Current network is EDGE
int NETWORK_TYPE_EHRPD
Current network is eHRPD
int NETWORK_TYPE_EVDO_0
Current network is EVDO revision 0
int NETWORK_TYPE_EVDO_A
Current network is EVDO revision A
int NETWORK_TYPE_EVDO_B
Current network is EVDO revision B
int NETWORK_TYPE_GPRS
Current network is GPRS
int NETWORK_TYPE_HSDPA
Current network is HSDPA
int NETWORK_TYPE_HSPA
Current network is HSPA
int NETWORK_TYPE_HSUPA
Current network is HSUPA
int NETWORK_TYPE_IDEN
Current network is iDen
int NETWORK_TYPE_LTE
Current network is LTE
int NETWORK_TYPE_UMTS
Current network is UMTS
int NETWORK_TYPE_UNKNOWN
Network type is unknown