Question

我正试图通过GPS在我的程序中获取我当前的手机位置。

问题是，坐标是不准确的（仅度数）还是没有给出位置。我现在编写了我的第三个程序，并且每个程序都有一个不同的教程，但它没有工作，因为它应该在那里工作。

设置了

uses-permission，因此这不是答案;）

所以这是我的代码：

public class GpsActivity extends Activity{

private TextView latituteField;
private TextView longitudeField;
private TextView dateField;
private TextView timeField;
private LocationManager locationManager;
private String provider;
private LocationListener listener; 

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    latituteField = (TextView) findViewById(R.id.TextView02);
    longitudeField = (TextView) findViewById(R.id.TextView04);
    dateField = (TextView) findViewById(R.id.tvdate);
    timeField = (TextView) findViewById(R.id.tvtime);
    GregorianCalendar g = new GregorianCalendar();
    g.setTimeInMillis(System.currentTimeMillis());

    DateFormat df = DateFormat.getInstance();
    Date d = df.getCalendar().getTime();
    dateField.setText(""+d.getDate()+"."+(d.getMonth()+1)+"."+(1980+d.getYear()));
    timeField.setText(""+g.getTime().getHours()+"h "+g.getTime().getMinutes()+"m "+g.getTime().getSeconds()+"s");


    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    // Define the criteria how to select the locatioin provider -> use
    // default
    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_FINE);

    provider = locationManager.getBestProvider(criteria, false);
    Location location = locationManager.getLastKnownLocation(provider);

    // Initialize the location fields
    if (location != null) {
        System.out.println("Provider " + provider + " has been selected.");
        int lat = (int) (location.getLatitude());
        int lng = (int) (location.getLongitude());

        latituteField.setText(""+lat+"//"+location.getAccuracy());
        longitudeField.setText(""+lng+"//"+location.getProvider());
    } else {
        latituteField.setText("Provider not available");
        longitudeField.setText("Provider not available");
    }
    listener = new MyLocationListener(); 
    locationManager.requestLocationUpdates("gps" ,10000L, 10.0f, listener); 

}

class MyLocationListener implements LocationListener{ 
    public void onLocationChanged(Location location) { 
            // TODO Auto-generated method stub 
            if (location != null){ 
                    latituteField.setText(("Lat: " + location.getLatitude())); 
                    longitudeField.setText("LLong: " + location.getLongitude());
            } 
    } 
    public void onProviderDisabled(String provider) { 

    } 
    public void onProviderEnabled(String provider) { 
            // TODO Auto-generated method stub 
    } 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
            // TODO Auto-generated method stub 
    } 
}
}

感谢您的回答！

雷

Answer 1

你可能只是一个微弱的信号。您可以使用android location API获取大致位置。

确保你站在外面，可以自由地看到天空，以获得“良好”的信号。不要站在建筑物等旁边。但即使这样做，也不会得到准确的信号。手机GPS'针对节能而非精确度进行了优化。他们也不会在你的手机上放一个太贵的芯片......

我的Android程序上的GPS坐标不准确

1 个答案: