Android平台提供的電話信息系統管理功能，主要包括：獲取電話信息（設備信息、SIM信息以及網絡信息）、偵聽電話狀態（呼叫狀態、服務狀態、信號強度狀態等）和調用電話撥號器。
在Manifest中添加Permission ：<uses-permission android:name="android.permission.READ_PHONE_STATE" />
TelephonyManager的獲得：TelephonyManager tm = (TelephonyManager) this.getSystemService(TELEPHONY_SERVICE);
String
ACTION_PHONE_STATE_CHANGED
Broadcast intent action indicating that the call state (cellular) on the device has changed.
int
CALL_STATE_IDLE
Device call state: No activity.
空閒（無呼入或已掛機）
int
CALL_STATE_OFFHOOK
Device call state: Off-hook.
摘機（有呼入）
int
CALL_STATE_RINGING
Device call state: Ringing.
響鈴（接聽中）
int
DATA_ACTIVITY_DORMANT
Data connection is active, but physical link is down
電話數據活動狀態類型：睡眠模式（3.1版本）
int
DATA_ACTIVITY_IN
Data connection activity: Currently receiving IP PPP traffic.
電話數據活動狀態類型：數據流入
int
DATA_ACTIVITY_INOUT
Data connection activity: Currently both sending and receiving IP PPP traffic.
電話數據活動狀態類型：數據交互
int
DATA_ACTIVITY_NONE
Data connection activity: No traffic.
電話數據活動狀態類型：無數據流動
int
DATA_ACTIVITY_OUT
Data connection activity: Currently sending IP PPP traffic.
電話數據活動狀態類型：數據流出
int
DATA_CONNECTED
Data connection state: Connected.
數據連接狀態類型：已連接
int
DATA_CONNECTING
Data connection state: Currently setting up a data connection.
數據連接狀態類型：正在連接
int
DATA_DISCONNECTED
Data connection state: Disconnected.
數據連接狀態類型：斷開
int
DATA_SUSPENDED
Data connection state: Suspended.
數據連接狀態類型：已暫停
String
EXTRA_INCOMING_NUMBER
The lookup key used with the ACTION_PHONE_STATE_CHANGED broadcast for a String containing the incoming phone number.
String
EXTRA_STATE
The lookup key used with the ACTION_PHONE_STATE_CHANGED broadcast for a String containing the new call state.
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_HSPAP
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
int
PHONE_TYPE_CDMA
Phone radio is CDMA.
int
PHONE_TYPE_GSM
Phone radio is GSM.
int
PHONE_TYPE_NONE
No phone radio.
int
PHONE_TYPE_SIP
Phone is via SIP.
int
SIM_STATE_ABSENT
SIM card state: no SIM card is available in the device
int
SIM_STATE_NETWORK_LOCKED
SIM card state: Locked: requries a network PIN to unlock
int
SIM_STATE_PIN_REQUIRED
SIM card state: Locked: requires the user's SIM PIN to unlock
int
SIM_STATE_PUK_REQUIRED
SIM card state: Locked: requires the user's SIM PUK to unlock
int
SIM_STATE_READY
SIM card state: Ready
int
SIM_STATE_UNKNOWN
SIM card state: Unknown.
public static final String
EXTRA_STATE_IDLE
Value used with EXTRA_STATE corresponding to CALL_STATE_IDLE.
public static final String
EXTRA_STATE_OFFHOOK
Value used with EXTRA_STATE corresponding to CALL_STATE_OFFHOOK.
public static final String
EXTRA_STATE_RINGING
Value used with EXTRA_STATE corresponding to CALL_STATE_RINGING.
int
getCallState()
Returns a constant indicating the call state (cellular) on the device.
CellLocation
getCellLocation()
Returns the current location of the device.
int
getDataActivity()
Returns a constant indicating the type of activity on a data connection (cellular).
處理偵測到的數據活動的改變事件。通過該函數，可以獲取數據活動狀態信息。
電話數據活動狀態類型定義在TelephoneyManager類中。
DATA_ACTIVITY_NONE 無數據流動
DATA_ACTIVITY_IN 數據流入
DATA_ACTIVITY_OUT 數據流出
DATA_ACTIVITY_INOUT 數據交互
DATA_ACTIVITY_DORMANT 睡眠模式（2.1版本）
int
getDataState()
Returns a constant indicating the current data connection state (cellular).
String
getDeviceId()
Returns the unique device ID, for example, the IMEI for GSM and the MEID or ESN for CDMA phones.
獲取設備標識（IMEI）
String
getDeviceSoftwareVersion()
Returns the software version number for the device, for example, the IMEI/SV for GSM phones.
獲得軟件版本String
getLine1Number()
Returns the phone number string for line 1, for example, the MSISDN for a GSM phone.
線路1的電話號碼List<NeighboringCellInfo>
getNeighboringCellInfo()
Returns the neighboring cell information of the device.
String
getNetworkCountryIso()
Returns the ISO country code equivalent of the current registered operator's MCC (Mobile Country Code).
獲取網絡的國家ISO代碼String
getNetworkOperator()
Returns the numeric name (MCC+MNC) of current registered operator.
獲取SIM移動國家代碼（MCC）和移動網絡代碼（MNC）
String
getNetworkOperatorName()
Returns the alphabetic name of current registered operator.
獲取服務提供商姓名（中國移動、中國聯通等）
int
getNetworkType()
Returns a constant indicating the radio technology (network type) currently in use on the device for data transmission.
獲取網絡類型
NETWORK_TYPE_UNKNOWN 未知網絡
NETWORK_TYPE_GPRS
NETWORK_TYPE_EDGE 通用分組無線服務（2.5G）
NETWORK_TYPE_UMTS 全球移動通信系統（3G）
NETWORK_TYPE_HSDPA
NETWORK_TYPE_HSUPA
NETWORK_TYPE_HSPA
NETWORK_TYPE_CDMA CDMA網絡（2.1版本）
NETWORK_TYPE_EVDO_0 CDMA2000 EV-DO版本0（2.1版本）
NETWORK_TYPE_EVDO_A CDMA2000 EV-DO版本A（2.1版本）
NETWORK_TYPE_EVDO_B CDMA2000 EV-DO版本B（2.1版本）
NETWORK_TYPE_1xRTT CDMA2000 1xRTT（2.1版本）
NETWORK_TYPE_IDEN
NETWORK_TYPE_LTE
NETWORK_TYPE_EHRPD
NETWORK_TYPE_HSPAP
int
getPhoneType()
Returns a constant indicating the device phone type.
電話類型
PHONE_TYPE_NONE 未知
PHONE_TYPE_GSM GSM手機
PHONE_TYPE_CDMA CDMA手機（2.1版本）
PHONE_TYPE_SIP via SIP手機
String
getSimCountryIso()
Returns the ISO country code equivalent for the SIM provider's country code.
獲取SIM卡中國家ISO代碼
String
getSimOperator()
Returns the MCC+MNC (mobile country code + mobile network code) of the provider of the SIM.
獲得SIM卡中移動國家代碼（MCC）和移動網絡代碼（MNC）String
getSimOperatorName()
Returns the Service Provider Name (SPN).
獲取服務提供商姓名（中國移動、中國聯通等）String
getSimSerialNumber()
Returns the serial number of the SIM, if applicable.
SIM卡序列號int
getSimState()
Returns a constant indicating the state of the device SIM card.
SIM卡狀態
SIM_STATE_UNKNOWN 未知狀態
SIM_STATE_ABSENT 未插卡
SIM_STATE_PIN_REQUIRED 需要PIN碼，需要SIM卡PIN碼解鎖
SIM_STATE_PUK_REQUIRED 需要PUK碼，需要SIM卡PUK碼解鎖
SIM_STATE_NETWORK_LOCKED 網絡被鎖定，需要網絡PIN解鎖
SIM_STATE_READY 准備就緒
其中：PIN個人識別碼 PUK個人解鎖碼
String
getSubscriberId()
Returns the unique subscriber ID, for example, the IMSI for a GSM phone.
獲得客戶標識（IMSI）String
getVoiceMailAlphaTag()
Retrieves the alphabetic identifier associated with the voice mail number.
String
getVoiceMailNumber()
Returns the voice mail number.
boolean
hasIccCard()
boolean
isNetworkRoaming()
Returns true if the device is considered roaming on the current network, for GSM purposes.
void
listen(PhoneStateListener listener, int events)
Registers a listener object to receive notification of changes in specified telephony states.
偵聽電話的呼叫狀態。
電話管理服務接口支持的偵聽類型在PhoneStateListener類中定義。
int
LISTEN_CALL_FORWARDING_INDICATOR
Listen for changes to the call-forwarding indicator.
偵聽呼叫轉移指示器改變事件
int
LISTEN_CALL_STATE
Listen for changes to the device call state.
偵聽呼叫狀態改變事件
int
LISTEN_CELL_LOCATION
Listen for changes to the device's cell location. Note that this will result in frequent callbacks to the listener.
偵聽設備位置改變事件
int
LISTEN_DATA_ACTIVITY
Listen for changes to the direction of data traffic on the data connection (cellular).
偵聽數據連接的流向改變事件
int
LISTEN_DATA_CONNECTION_STATE
Listen for changes to the data connection state (cellular).
偵聽數據連接狀態改變事件
int
LISTEN_MESSAGE_WAITING_INDICATOR
Listen for changes to the message-waiting indicator.
偵聽消息等待指示器改變事件
int
LISTEN_NONE
Stop listening for updates.
停止偵聽
int
LISTEN_SERVICE_STATE
Listen for changes to the network service state (cellular).
偵聽網絡服務狀態
int
LISTEN_SIGNAL_STRENGTH
This constant is deprecated. by LISTEN_SIGNAL_STRENGTHS
偵聽網絡信號強度
int
LISTEN_SIGNAL_STRENGTHS
Listen for changes to the network signal strengths (cellular).
PhoneStateListener()
void
onCallForwardingIndicatorChanged(boolean cfi)
Callback invoked when the call-forwarding indicator changes.
void
onCallStateChanged(int state, String incomingNumber)
Callback invoked when device call state changes.
處理偵測到的電話呼叫狀態的改變事件。通過該回調事件，可以獲取來電號碼，而且可以獲取電話呼叫狀態。即用switch(state){case TelephoneManager.CALL_STATE_……}來判斷
void
onCellLocationChanged(CellLocation location)
Callback invoked when device cell location changes.
void
onDataActivity(int direction)
Callback invoked when data activity state changes.
void
onDataConnectionStateChanged(int state)
Callback invoked when connection state changes.
void
onDataConnectionStateChanged(int state, int networkType)
same as above, but with the network type.
處理偵測到的數據連接狀態的改變狀態。通過該回調函數，可以獲取數據連接狀態信息。
數據連接類型
DATA_DISCONNECTED 斷開
DATA_CONNECTING 正在連接
DATA_CONNECTED 已連接
DATA_SUSPENDED 已暫停
void
onMessageWaitingIndicatorChanged(boolean mwi)
Callback invoked when the message-waiting indicator changes.
void
onServiceStateChanged(ServiceState serviceState)
Callback invoked when device service state changes.
處理偵測到的服務狀態的改變事件。通過該回調函數可以獲取服務狀態信息。
電話服務狀態類型定義在ServiceState類中。
void
onSignalStrengthChanged(int asu)
This method is deprecated. Use onSignalStrengthsChanged(SignalStrength)
處理偵測到的信號強度的改變事件。通過該回調函數，可以獲取信號強度類型。
void
onSignalStrengthsChanged(SignalStrength signalStrength)
Callback invoked when network signal strengths changes.
其中的電話號碼可以通過EditText中輸入獲得數據，如editText.getText().toString().trim()來獲得
上面的代碼可以放在Button的onClick方法中調用即可實現撥打電話的功能，調用的是系統的撥號界面。