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在这段代码中，我想获取经度和纬度并将它们转换为字符串以在屏幕和短信上使用它，所以我应该如何处理它应该做新课程？或此代码只是修改

我应该怎么做才能让它工作我使用了所有地点的许可

public class MainActivity extends Activity implements LocationListener  {

    Location location; // location

    LocationManager locationManager;
    public String LatTxt;
    public String LonTxt;
    public Double latitude; // latitude
    public Double longitude; // longitude
    TextView latTextView = (TextView) findViewById(R.id.Latitude_Txt);
    TextView lonTextView = (TextView) findViewById(R.id.Longitude_Txt);
    // The minimum distance to change Updates in meters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = (long) (1000 * 60 * 0.25); // 0.25
                                                                                // minute

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        LocationListener locListener = new MyLocationListener();
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,locListener);

        lonTextView.setText(" " + location.getLongitude());
        latTextView.setText(" " + location.getLatitude());

    }

    @Override
    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub
        latitude = location.getLatitude();
        LatTxt = latitude.toString();
        longitude = location.getLongitude();
        LonTxt = longitude.toString();
    }

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

    }

}






<TextView
                    android:id="@+id/Latitude_Txt"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@android:color/white"
                    android:gravity="center_horizontal"
                    android:text="Latitude"
                    android:textColor="@android:color/black"
                    android:textSize="16sp" />
            </LinearLayout>
4

2 回答 2

0

放

lonTextView.setText(" " + location.getLongitude());
latTextView.setText(" " + location.getLatitude());

至

@Override
public void onLocationChanged(Location location) {


}

您尝试打印location：protected void onCreate(Bundle savedInstanceState)但未location启动。

顺便说一句，在行前添加：

 lonTextView.setText(" " + location.getLongitude());
 latTextView.setText(" " + location.getLatitude());

此代码，用于初始化旧位置

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,this); 
Criteria criteria = new Criteria();

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

并删除你的requestLocationUpdates

[编辑]

 public class MainActivity extends Activity implements LocationListener  {

Location location; // location

LocationManager locationManager;
public String LatTxt;
public String LonTxt;
public Double latitude; // latitude
public Double longitude; // longitude
TextView latTextView = (TextView) findViewById(R.id.Latitude_Txt);
TextView lonTextView = (TextView) findViewById(R.id.Longitude_Txt);
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = (long) (1000 * 60 * 0.25); // 0.25
                                                                            // minute

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    LocationListener locListener = this;
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,locListener);



}

@Override
public void onLocationChanged(Location location) {

    // TODO Auto-generated method stub
    latitude = location.getLatitude();
    LatTxt = latitude.toString();
    longitude = location.getLongitude();
    LonTxt = longitude.toString();

    lonTextView.setText(" " + location.getLongitude());
    latTextView.setText(" " + location.getLatitude());
}

@Override
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub

}

@Override
public void onProviderEnabled(String provider) {

}

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

 }
}
于 2013-09-12T10:24:27.103 回答
0

当接收到新的 GPS 坐标时。将调用 onLocationChanged 函数。你应该在那里进行 GPS 坐标操作

于 2013-09-12T10:26:06.337 回答