Question

所以我发现这个脚本可以获得最佳位置并将其添加到应用程序中。当我调用该位置时，它只是在包名后面给出一个随机数（com.android.package.currentactivity$1@randomcode）

MyLocation myLocation = new MyLocation();
private void locationClick() {
    myLocation.getLocation(this, locationResult));
}

public LocationResult locationResult = new LocationResult(){
    @Override
    public void gotLocation(final Location location){
        //Got the location!
        });
    }
};

和MyLocation.java

import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;

public class MyLocation {
    Timer timer1;
    LocationManager lm;
    LocationResult locationResult;
    boolean gps_enabled=false;
    boolean network_enabled=false;

    public boolean getLocation(Context context, LocationResult result)
    {
        //I use LocationResult callback class to pass location value from MyLocation to user code.
        locationResult=result;
        if(lm==null)
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        //exceptions will be thrown if provider is not permitted.
        try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
        try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}

        //don't start listeners if no provider is enabled
        if(!gps_enabled && !network_enabled)
            return false;

        if(gps_enabled)
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
        if(network_enabled)
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
        timer1=new Timer();
        timer1.schedule(new GetLastLocation(), 20000);
        return true;
    }

    LocationListener locationListenerGps = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerNetwork);
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    LocationListener locationListenerNetwork = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerGps);
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    class GetLastLocation extends TimerTask {
        @Override
        public void run() {
             lm.removeUpdates(locationListenerGps);
             lm.removeUpdates(locationListenerNetwork);

             Location net_loc=null, gps_loc=null;
             if(gps_enabled)
                 gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
             if(network_enabled)
                 net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

             //if there are both values use the latest one
             if(gps_loc!=null && net_loc!=null){
                 if(gps_loc.getTime()>net_loc.getTime())
                     locationResult.gotLocation(gps_loc);
                 else
                     locationResult.gotLocation(net_loc);
                 return;
             }

             if(gps_loc!=null){
                 locationResult.gotLocation(gps_loc);
                 return;
             }
             if(net_loc!=null){
                 locationResult.gotLocation(net_loc);
                 return;
             }
             locationResult.gotLocation(null);
        }
    }

    public static abstract class LocationResult{
        public abstract void gotLocation(Location location);
    }
}

我试图得到的是lat和lng所以我可以使用的是我的活动。

Answer 1

您需要更明确地知道在哪里获得该字符串，因此我们可以帮助您查明问题，但该字符串将您的Activity实例表示为String。

public String toString（）   自：API Level 1

返回一个字符串，其中包含此对象的简洁，可读的描述。鼓励子类重写此方法并提供考虑对象类型和数据的实现。默认实现等效于以下表达式：
 getClass().getName() + '@' + Integer.toHexString(hashCode())
如果您打算实现自己的toString方法，请参阅编写有用的toString方法。返回此对象的可打印表示形式。

编辑：这不是你的活动，而是它内部的一个内部类（这由$ 1部分讲述）。也许MyLocation实例？

Answer 2

您需要将其中一个或两个添加到manifest.xml：

    <uses-permission
    android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission
    android:name="android.permission.ACCESS_FINE_LOCATION" />

这是我的大部分位置代码。用它。它有效。：

    /**************************************************************************
 * helper functions for starting/stopping monitoring of Location changes below
 **************************************************************************/

public void startListening() {

    if (networkLocationListener == null && gpsLocationListener == null) {
        // make new listeners
        networkLocationListener = new BegetLocationListener(LocationManager.NETWORK_PROVIDER);
        gpsLocationListener = new BegetLocationListener(LocationManager.GPS_PROVIDER);

        // request very rapid updates initially. after first update, we'll put them back down to a much lower frequency
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 60000, 200, networkLocationListener);
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 60000, 200, gpsLocationListener);
    }

    Location networkLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

    if (networkLocation != null) {
        appModel.setLocation(networkLocation);
    }
    updateDistances(appModel.getLocation());
}

private void stopListening() {

    if (networkLocationListener != null)
        locationManager.removeUpdates(networkLocationListener);
    if (gpsLocationListener != null)
        locationManager.removeUpdates(gpsLocationListener);

    gpsLocationListener = null;
    networkLocationListener = null;
}

private void handleListenerDisabled(BegetLocationListener listener) {

    if (!appModel.getFlags().hasLocationMessageBeenDisplayed()) {
        if (networkLocationListener.locationStatusKnown && gpsLocationListener.locationStatusKnown) {
            if (networkLocationListener.locationIsEnabled && !gpsLocationListener.locationIsEnabled) {
                showAlert(YES_NETWORK_NO_GPS_MSG, BaseActivity.DIALOG_LOCATION);
                appModel.getFlags().setLocationMessageDisplayed(true);
            } else {
                showAlert(NO_NETWORK_NO_GPS_MSG, BaseActivity.DIALOG_LOCATION);
                appModel.getFlags().setLocationMessageDisplayed(true);
            }
        }
    }
}

private void handleLocationChanged(Location location) {

    if (location == null) {
        return;
    }

    if (isBetterLocation(location, appModel.getLocation())) {
        appModel.setLocation(location);
        stopListening();
    }
}

private class BegetLocationListener implements LocationListener {

    private String provider = "";
    private boolean locationIsEnabled = true;
    private boolean locationStatusKnown = true;

    public BegetLocationListener(String provider) {
        this.provider = provider;
    }

    @Override
    public void onLocationChanged(Location location) {
        // Called when a new location is found by the network location provider.
        handleLocationChanged(location);
    }

    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

    public void onProviderEnabled(String provider) {
        startListening();
    }

    public void onProviderDisabled(String provider) {
        locationStatusKnown = true;
        locationIsEnabled = false;
        handleListenerDisabled(this);
    }
}

显然，您需要删除appModel内容和自定义对话框内容。

抓住lat和lng

2 个答案: