Android Chinese API (131) -- GpsStatus

Preface

This chapter is about android. location. gpsStatus, for GPS related chapter, version for Android 3.2 r1, translated from "pandatv 82", welcome to visit his blog: "http://wisekingokok.cnblogs.com", thanks again "pandatv 82 "! Welcome to join in Android Chinese translation, contact me over140@gmail.com.

 

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GpsStatus

Translator's signature: pandatv 82

Link: http://wisekingokok.cnblogs.com

Version: Android 3.2 r1

 

Structure

Inheritance relationship

Public final class GpsStatus extends Object

Java. lang. Object

Android. location. GpsStatus

 

Class Overview

This class is used to express the current status of the GPS engine. This class must be used in conjunction with the GpsStatus. Listener interface.

 

Constant

IntGPS_EVENT_FIRST_FIX

This event code is sent when the GPS system module receives the first GPS location information. Call the getTimeToFirstFix () method to obtain the time it takes to enable the self-GPS system module to locate it for the first time.

Constant Value: 3 (0x00000003)

IntGPS_EVENT_SATELLITE_STATUS

Periodically send the Event code of the GPS satellite status. Call getSatellites () to obtain the status of each satellite. (Note: This event code is sent only after the satellite status is obtained. This event code is not sent when no satellite is found .)

Constant Value: 4 (0x00000004)

IntGPS_EVENT_STARTED

This event code is sent when the GPS system module is enabled.

Constant Value: 1 (0x00000001)

 

IntGPS_EVENT_STOPPED

This event code is sent when the GPS system module is disabled.

Constant Value: 2 (0x00000002)

 

Internal class

InterfaceGpsStatus. Listener

Receives notifications when the GPS status changes.

 

InterfaceGpsStatus. NmeaListener

Receives NMEA information from GPS.

 

Common Methods

Public intGetMaxSatellites()

Returns the maximum number of satellites returned by the getSatellites () method.

Return Value

Maximum number of satellites.

 

Public Iterable <GpsSatellite>GetSatellites()

Returns a set of satellite objects used to describe the current state of the GPS engine.

Return Value

A group of satellite objects.

 

Public intGetTimeToFirstFix()

Returns the time required for the first position received since the GPS engine was last started.

Return Value

Time required for first Positioning

 

Supplement

Article Selection

Baidu encyclopedia GPS

Android positioning function (1)

Android positioning function (2)

 

GpsStatus. Listener

Translator's signature: pandatv 82

Link: http://wisekingokok.cnblogs.com

Version: Android 3.2 r1

 

Structure

Inheritance relationship

Public static interface GpsStatus. Listener

Android. location. GpsStatus. Listener

 

Class Overview

It is used to receive notifications when the GPS status changes.

 

Common Methods

Public abstract voidOnGpsStatusChanged(Int event)

This method is called back when the GPS status changes. When the GPS status changes, one of the following four event codes is sent:

* GPS_EVENT_STARTED

* GPS_EVENT_STOPPED

* GPS_EVENT_FIRST_FIX

* GPS_EVENT_SATELLITE_STATUS

You can call getGpsStatus (Gpsstatus) inside the method to obtain GPS status information.

Parameters

The event code when the event GPS status changes.

 

 

GpsStatus. NmeaListener

Translator's signature: pandatv 82

Link: http://wisekingokok.cnblogs.com

Version: Android 3.2 r1

 

Structure

Inheritance relationship

Public static interface GpsStatus. NmeaListener

Android. location. GpsStatus. NmeaListener

 

Class Overview

Used to obtain NMEA information from GPS. NMEA 0183 is a standard for communication with marine electronic devices. It is a common method to receive data from GPS through a series of interfaces. For more details, see NMEA0183. You can implement this interface and call addNmeaListener (GpsStatus. NmeaListener) to receive NMEA data from the GPS engine. Here the NMEA-0183 protocol is generally referred to as the GPS protocol, see here .)

 

Common Methods

Public abstract voidOnNmeaReceived(Long timestamp, String nmea)

(Note: The original Article does not have a description. This method of this interface seems to be a reserved specification. It has tracked the source code and found that nmea_callback code is added at the hardware access layer before data can be uploaded to the upper layer of the application.

Parameters

Timestamp, in milliseconds.

Nmea information.

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