黑莓GPS標準

Question

我正在開發一款具有GPS功能的BB應用程序。但問題是GPS標準因運營商和設備而異。那麼是否有人知道可以使用的不同設置標準？我試圖使用不同的鏈接BB支持論壇，但我沒有得到任何保證的方式，應該適用於每種情況。在此先感謝..

謝謝; 無

Answer 1

編輯：對不起剛注意到你的問題是關於運營商的標準......所以這不完全是答案。

我不是黑莓GPS標準的專家，我的答案是基於使用它幾次我用過它。

根據我的經驗，GPS標準基於一組要求（準確度，功耗，成本），並將這些數據輸入到標準對象中。例如，這裏是我從互聯網上下載的一些代碼。

/** 
    * assisted: Use this mode to get location information from satellites using a PDE. This mode allows a BlackBerry device 
    * application to retrieve location information faster than the autonomous mode and more accurately than the cell site mode. 
    * To use this mode requires wireless network coverage, and the BlackBerry device and the wireless service provider must 
    * support this mode. 
    */ 
    private Criteria getAssistedCriteria(int powerConsumption) { 
     Criteria criteria = new Criteria(); 
     criteria.setHorizontalAccuracy(100); 
     criteria.setVerticalAccuracy(100); 
     criteria.setCostAllowed(true); 
     criteria.setPreferredPowerConsumption(powerConsumption); 
     return criteria; 
    } 


    /** 
    * autonomous: Use this mode to get location information from the GPS receiver on the BlackBerry device without assistance 
    * from the wireless network. This mode allows a BlackBerry device application to retrieve location information that has highaccuracy, 
    * and does not require assistance from the wireless network. However, the speed at which this mode retrieves 
    * location information is slower than the other modes. 
    */ 
    private Criteria getAutonomousPosCriteria() { 
     Criteria criteria = new Criteria(); 
     criteria.setCostAllowed(false); 
     return criteria; 
    } 

    /** 
    * cell site: Use this mode to get location information from cell site towers. This mode allows a BlackBerry device application 
    * retrieve location information faster than the assisted and autonomous modes. However, the accuracy of the location 
    * information is low-level and does not provide tracking information such as speed or route information. Using this mode 
    * requires wireless network coverage and that both the BlackBerry device and the wireless service provider support this mode. 
    */ 
    private Criteria getCellSiteCriteria() { 
     Criteria criteria = new Criteria(); 
     criteria.setHorizontalAccuracy(Criteria.NO_REQUIREMENT); 
     criteria.setVerticalAccuracy(Criteria.NO_REQUIREMENT); 
     criteria.setCostAllowed(true); 
     criteria.setPreferredPowerConsumption(Criteria.POWER_USAGE_LOW); 
     return criteria; 
    } 

完整的文件位於：http://blackberry.svn.wordpress.org/trunk/src/com/wordpress/location/Gps.java

看一看在這個JavaDoc的表：http://www.blackberry.com/developers/docs/6.0.0api/javax/microedition/location/Criteria.html