android获取经纬度：从谷歌源码中提取出来的获取经纬度代码

经过测试发现，在有的手机上获取经纬度没有问题，在其他的手机上获取经纬度却又问题，因此我查看了谷歌提供的源码，从源码里面提取出了一份新的获取经纬度的代码，以后每次获取基本都获取成功了:


LocationManager lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

Location retLocation = null ;
LocationProvider gpsProvider =
lm.getProvider("gps");

if(gpsProvider == null)
{
longitude.setText("0");
dimensions.setText("0");
return;
}


//下面必须原封不动的照搬，否则就会出错，原因我也不知道。
lm.requestLocationUpdates(gpsProvider.getName(),
0 /*minTime*/, 0 /*minDist*/, this);
try {
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
3000 /*minTime*/, 0 /*minDist*/, this);
} catch (RuntimeException e) {
// If anything at all goes wrong with getting a cell location do not
// abort. Cell location is not essential to this app.
}

retLocation = lm.getLastKnownLocation("gps");
if(retLocation==null)
{
longitude.setText("0");
dimensions.setText("0");
}
else
{
double geoLatitude = retLocation.getLatitude();//获取经度
double geoLongitude = retLocation.getLongitude();//获取维度

longitude.setText(""+geoLongitude);
dimensions.setTag(""+geoLatitude);
}

longitude.setEnabled(false);
 

Location改变的消息在这个接口方法中获取:


private void updataGpsWidthLocation(Location location) {
// TODO Auto-generated method stub
if(location != null)
{
double lit = location.getLongitude();//进度
double dimen = location.getLatitude();//维度
longitude.setText(""+lit);
this.dimensions.setText(""+dimen);
float accuray=location.getAccuracy();//获取精确度
Log.e("", "accuray:"+accuray);
accurText.setText(""+accuray);
}
else
{
longitude.setText("0");
dimensions.setText("0");
}
}