CellularDataInfoManager

java.lang.Object
- ohos.telephony.CellularDataInfoManager

```
public class CellularDataInfoManager
extends Object
```
Provides methods related to cellular data services.
This class provides methods for querying and setting the state of cellular data services and monitoring the state.

从以下版本开始:

1

字段概要

字段
限定符和类型	字段	说明
`static int`	`DATA_FLOW_TYPE_DORMANT`	Indicates that there is no uplink or downlink data, and the bottom-layer link is in the dormant state.
`static int`	`DATA_FLOW_TYPE_DOWN`	Indicates that there is only downlink data.
`static int`	`DATA_FLOW_TYPE_NONE`	Indicates that there is no uplink or downlink data.
`static int`	`DATA_FLOW_TYPE_UP`	Indicates that there is only uplink data.
`static int`	`DATA_FLOW_TYPE_UPDOWN`	Indicates that there is uplink and downlink data.
`static int`	`DATA_STATE_CONNECTED`	Indicates that a cellular data link is connected.
`static int`	`DATA_STATE_CONNECTING`	Indicates that a cellular data link is being connected.
`static int`	`DATA_STATE_DISCONNECTED`	Indicates that a cellular data link is disconnected.
`static int`	`DATA_STATE_SUSPENDED`	Indicates that a cellular data link is suspended.
`static int`	`DATA_STATE_UNKNOWN`	Indicates that a cellular data link is unknown.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法	说明
`void`	`addObserver(CellularDataStateObserver observer, int mask)`	Adds an observer for monitoring cellular data service state changes.
`int`	`getCellularDataFlowType()`	Obtains the uplink and downlink status of cellular data services.
`int`	`getCellularDataState(int slotId)`	Obtains the connection state of the PS domain.
`int`	`getDefaultCellularDataSlotId()`	Obtains the SIM card where cellular data services are available.
`static CellularDataInfoManager`	`getInstance(Context context)`	Obtains a `CellularDataInfoManager` instance.
`boolean`	`isCellularDataEnabled()`	Checks whether cellular data services are enabled.
`boolean`	`isCellularDataRoamingEnabled(int slotId)`	Checks whether roaming is enabled for cellular data services.
`void`	`removeObserver(CellularDataStateObserver observer)`	Removes an observer for monitoring cellular data service state changes.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - DATA_FLOW_TYPE_DORMANT
```
public static final int DATA_FLOW_TYPE_DORMANT
```
    Indicates that there is no uplink or downlink data, and the bottom-layer link is in the dormant state.
    It is a return value of service state query of cellular data services.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_FLOW_TYPE_DOWN
```
public static final int DATA_FLOW_TYPE_DOWN
```
    Indicates that there is only downlink data.
    It is a return value of service state query of cellular data services.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_FLOW_TYPE_NONE
```
public static final int DATA_FLOW_TYPE_NONE
```
    Indicates that there is no uplink or downlink data.
    It is a return value of service state query of cellular data services.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_FLOW_TYPE_UP
```
public static final int DATA_FLOW_TYPE_UP
```
    Indicates that there is only uplink data.
    It is a return value of service state query of cellular data services.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_FLOW_TYPE_UPDOWN
```
public static final int DATA_FLOW_TYPE_UPDOWN
```
    Indicates that there is uplink and downlink data.
    It is a return value of service state query of cellular data services.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_STATE_CONNECTED
```
public static final int DATA_STATE_CONNECTED
```
    Indicates that a cellular data link is connected.
    It is a return value for querying the cellular data link connection state.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_STATE_CONNECTING
```
public static final int DATA_STATE_CONNECTING
```
    Indicates that a cellular data link is being connected.
    It is a return value for querying the cellular data link connection state.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_STATE_DISCONNECTED
```
public static final int DATA_STATE_DISCONNECTED
```
    Indicates that a cellular data link is disconnected.
    It is a return value for querying the cellular data link connection state.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_STATE_SUSPENDED
```
public static final int DATA_STATE_SUSPENDED
```
    Indicates that a cellular data link is suspended.
    It is a return value for querying the cellular data link connection state.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - DATA_STATE_UNKNOWN
```
public static final int DATA_STATE_UNKNOWN
```
    Indicates that a cellular data link is unknown.
    It is a return value for querying the cellular data link connection state.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
- 方法详细资料
  - getInstance
```
public static CellularDataInfoManager getInstance(Context context)
```
    Obtains a CellularDataInfoManager instance.
    
    参数:
    
    context - Indicates the application context.
    
    返回:
    
    Returns a CellularDataInfoManager instance.
    
    从以下版本开始:
    
    1
  - getCellularDataFlowType
```
public int getCellularDataFlowType()
```
    Obtains the uplink and downlink status of cellular data services.
    
    返回:
    
    Returns the uplink and downlink status. There are five types, as specified in DATA_FLOW_TYPE_NONE.
    
    从以下版本开始:
    
    1
  - isCellularDataEnabled
```
public boolean isCellularDataEnabled()
```
    Checks whether cellular data services are enabled.
    Requires Permission: ohos.permission.GET_NETWORK_INFO.
    
    返回:
    
    Returns true if cellular data services are enabled; returns false otherwise.
    
    从以下版本开始:
    
    1
  - isCellularDataRoamingEnabled
```
public boolean isCellularDataRoamingEnabled(int slotId)
```
    Checks whether roaming is enabled for cellular data services.
    Requires Permission: ohos.permission.GET_NETWORK_INFO.
    
    参数:
    
    slotId - Indicates the ID of a card slot. The value 0 indicates card 1, and the value 1 indicates card 2.
    
    返回:
    
    Returns true if roaming is enabled for cellular data services; returns false otherwise.
    
    从以下版本开始:
    
    1
  - getCellularDataState
```
public int getCellularDataState(int slotId)
```
    Obtains the connection state of the PS domain.
    参数:
    
    slotId - Indicates the ID of a card slot. The value 0 indicates card 1, and the value 1 indicates card 2.
    
    返回:
    Returns the connection state, which can be any of the following:
    
    DATA_STATE_UNKNOWN
    DATA_STATE_DISCONNECTED
    DATA_STATE_CONNECTING
    DATA_STATE_CONNECTED
    DATA_STATE_SUSPENDED
    从以下版本开始:
    
    1
  - getDefaultCellularDataSlotId
```
public int getDefaultCellularDataSlotId()
```
    Obtains the SIM card where cellular data services are available.
    
    返回:
    
    Returns 0 if cellular data services are available on card 1; returns 1 if they are available on card 2.
    
    从以下版本开始:
    
    1
  - addObserver
```
public void addObserver(CellularDataStateObserver observer,
                        int mask)
```
    Adds an observer for monitoring cellular data service state changes.
    You must override the CellularDataStateObserver class to register an observer to monitor state changes. When the state changes, the corresponding CellularDataStateObserver instance is invoked to notify the application of the changes.
    参数:
    
    observer - Indicates the observer instance for state monitoring.
    mask - Indicates the state mask to be monitored, which can be either of the following:
    
    CellularDataStateObserver#OBSERVE_MASK_DATA_CONNECTION_STATE
    CellularDataStateObserver#OBSERVE_MASK_DATA_FLOW
    从以下版本开始:
    
    1
  - removeObserver
```
public void removeObserver(CellularDataStateObserver observer)
```
    Removes an observer for monitoring cellular data service state changes.
    
    参数:
    
    observer - Indicates the observer instance for state monitoring.
    
    从以下版本开始:
    
    1

类 CellularDataInfoManager

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

DATA_FLOW_TYPE_DORMANT

DATA_FLOW_TYPE_DOWN

DATA_FLOW_TYPE_NONE

DATA_FLOW_TYPE_UP

DATA_FLOW_TYPE_UPDOWN

DATA_STATE_CONNECTED

DATA_STATE_CONNECTING

DATA_STATE_DISCONNECTED

DATA_STATE_SUSPENDED

DATA_STATE_UNKNOWN

方法详细资料

getInstance

getCellularDataFlowType

isCellularDataEnabled

isCellularDataRoamingEnabled

getCellularDataState

getDefaultCellularDataSlotId

addObserver

removeObserver