关于GPS的问题

[T-Quake]

大家好,我最近在调关于GPS的东西,

我搞了个网上的代码 写了个测试程序

import android.app.Activity;   
import android.content.Context;   
import android.location.Criteria;   
import android.location.Location;   
import android.location.LocationListener;   
import android.location.LocationManager;   
import android.os.Bundle;   
import android.widget.TextView;   
  
public class CurrentLocation extends Activity {   
    /** Called when the activity is first created. */  
    @Override  
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);   
        LocationManager locationManager;   
        String serviceName = Context.LOCATION_SERVICE;   
        locationManager = (LocationManager)getSystemService(serviceName);   
        //String provider = LocationManager.GPS_PROVIDER;   
           
        Criteria criteria = new Criteria();   
        criteria.setAccuracy(Criteria.ACCURACY_FINE);   
        criteria.setAltitudeRequired(false);   
        criteria.setBearingRequired(false);   
        criteria.setCostAllowed(true);   
        criteria.setPowerRequirement(Criteria.POWER_LOW);   
        String provider = locationManager.getBestProvider(criteria, true);   
           
        Location location = locationManager.getLastKnownLocation(provider);   
        updateWithNewLocation(location);   
        locationManager.requestLocationUpdates(provider, 2000, 10,   
                        locationListener);   
    }   
   private final LocationListener locationListener = new LocationListener() {   
            public void onLocationChanged(Location location) {   
            updateWithNewLocation(location);   
            }   
            public void onProviderDisabled(String provider){   
            updateWithNewLocation(null);   
            }   
            public void onProviderEnabled(String provider){ }   
            public void onStatusChanged(String provider, int status,   
            Bundle extras){ }   
    };   
    private void updateWithNewLocation(Location location) {   
            String latLongString;   
            TextView myLocationText;   
            myLocationText = (TextView)findViewById(R.id.myLocationText);   
            if (location != null) {   
            double lat = location.getLatitude();   
            double lng = location.getLongitude();   
            latLongString = "纬度:" + lat + "\n经度:" + lng;   
            } else {   
            latLongString = "无法获取地理信息";   
            }   
            myLocationText.setText("您当前的位置是:\n" +   
            latLongString);   
    }   
}  

可是不知道为什么 怎么总是去调用A-GPS,并且去设置GPRS的东西,可是我不想去走GPRS的A-GPS,而是想走GPS.不知道 是不是接口调用的有问题.

[dinjay]

真机还是模拟器，查看下设备的GPS设置是否正确

[T-Quake]

是真机器.发现驱动走A-gps,会配置GPRS,然后将值传给驱动,驱动进入冷启动状态.然后onLocationChanged
就没被执行过.去读串口发现gps已经启动,并且不停的写数据,可是为什么onLocationChanged
没执行呢?

[yangji842003]

可能是这句话的问题
criteria.setAccuracy(Criteria.ACCURACY_FINE);
不应该用精确定位，因为精确定位是用AGPS，可以考虑使用模糊定位，模糊定位才是使用GPS。
criteria.setAccuracy(Criteria.ACCURACY_COARSE);

[T-Quake]

E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): rtn V O 0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=1
E/gps_sirf( 1149): SIRF_PAL_HW_WriteON_OFF, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=0
E/gps_sirf( 1149): SIRF_PAL_HW_WriteRESET, level=1
E/gps_sirf( 1149): rtn V C 0

[T-Quake]

发现 编译成.so的驱动程序 报Log.e()的错误, 不停的去reset on off gps芯片

[yangji842003]

使用系统提供的provider试试看：
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 10,
locationListener);

[T-Quake]

不行,还是走A-gps 而且发现代码中的listener根本一直没被触发,location一直是空值

[文斌]

可能是机器驱动默认就是先走AGPS

[T-Quake]

我想問下 我可不可以 發送模擬的GPS信號 如同在模擬器上的 一樣，手機內部有什麽命令可以發送這樣的命令嗎？模擬器是用geo ，手機上有什麽命令嗎？