1

を使用しCriteria.ACCURACY_COARSEて場所を取得しますが、正確ではありません。GPSを使いたかったのですCriteria.ACCURACY_FINEが、onLocationChanged(Location location)メソッドが呼び出されません。
私はいくつかの調査をしましたが、その理由を理解できませんでした。
StackOverflowにも同様の質問がたくさんありますが、残念ながら、問題を解決する質問は見つかりませんでした。
以下は私のソースコードです：

private void locationInformationSettings(){
    Criteria criteria= new  Criteria();;
    criteria.setAccuracy(Criteria.ACCURACY_FINE); //using Criteria.ACCURACY_COARSE works
    //criteria.setPowerRequirement(Criteria.POWER_LOW);

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    String providername = locationManager.getBestProvider(criteria, true);

    myLocationListener = new MyLocationListener();

    locationManager.requestLocationUpdates(
            providername, //LocationManager.GPS_PROVIDER, 
            Utils.MINIMUM_TIME_BETWEEN_UPDATES, 
            Utils.MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
            myLocationListener
    );      
}

private class MyLocationListener implements LocationListener {

    public void onLocationChanged(Location location) {

        locLongitude = location.getLongitude();
        locLatitude = location.getLatitude();
        String message = String.format(
                "New Location \n Longitude: %1$s \n Latitude: %2$s",
                locLongitude, locLatitude);
        Toast.makeText(RecordActivity.this, message, Toast.LENGTH_LONG).show();
        Log.e(TAG, "Location information received:(" + locLongitude + "," + locLatitude +")");
        locationManager.removeUpdates(myLocationListener);
    }

    public void onStatusChanged(String s, int i, Bundle b) {
        Toast.makeText(RecordActivity.this, "Provider status changed",
                Toast.LENGTH_LONG).show();
    }

    public void onProviderDisabled(String s) {
        Toast.makeText(RecordActivity.this,
                "Provider disabled by the user. GPS turned off",
                Toast.LENGTH_LONG).show();
    }

    public void onProviderEnabled(String s) {
        Toast.makeText(RecordActivity.this,
                "Provider enabled by the user. GPS turned on",
                Toast.LENGTH_LONG).show();
    }

}

マニフェストファイルのアクセス許可：

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

ネットワークプロバイダーの使用が機能し、GPSプロバイダーが機能しないのはなぜですか？
デバイスの設定でGPSサービスを確認し、Android4.3とAndroid2.3.3でテストしました。
前もって感謝します

4

3 に答える 3

2

どうぞ

package com.test.locationmanager;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.widget.TextView;

public class LocationManagerStatus extends Activity {

private LocationManager locationManager;
private TextView textView;
private final LocationListener gpsLocationListener = new LocationListener() {

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        final String tvTxt = textView.getText().toString();
        switch (status) {
        case LocationProvider.AVAILABLE:
            textView.setText(tvTxt + "GPS available again\n");
            break;
        case LocationProvider.OUT_OF_SERVICE:
            textView.setText(tvTxt + "GPS out of service\n");
            break;
        case LocationProvider.TEMPORARILY_UNAVAILABLE:
            textView.setText(tvTxt + "GPS temporarily unavailable\n");
            break;
        }
    }

    @Override
    public void onProviderEnabled(String provider) {
        textView.setText(textView.getText().toString()
                + "GPS Provider Enabled\n");
    }

    @Override
    public void onProviderDisabled(String provider) {
        textView.setText(textView.getText().toString()
                + "GPS Provider Disabled\n");
    }

    @Override
    public void onLocationChanged(Location location) {
        locationManager.removeUpdates(networkLocationListener);
        textView.setText(textView.getText().toString()
                + "New GPS location: "
                + String.format("%9.6f", location.getLatitude()) + ", "
                + String.format("%9.6f", location.getLongitude()) + "\n");
    }
};
private final LocationListener networkLocationListener = new LocationListener() {

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        final String tvTxt = textView.getText().toString();
        switch (status) {
        case LocationProvider.AVAILABLE:
            textView.setText(tvTxt + "Network location available again\n");
            break;
        case LocationProvider.OUT_OF_SERVICE:
            textView.setText(tvTxt + "Network location out of service\n");
            break;
        case LocationProvider.TEMPORARILY_UNAVAILABLE:
            textView.setText(tvTxt
                    + "Network location temporarily unavailable\n");
            break;
        }
    }

    @Override
    public void onProviderEnabled(String provider) {
        textView.setText(textView.getText().toString()
                + "Network Provider Enabled\n");
    }

    @Override
    public void onProviderDisabled(String provider) {
        textView.setText(textView.getText().toString()
                + "Network Provider Disabled\n");
    }

    @Override
    public void onLocationChanged(Location location) {
        textView.setText(textView.getText().toString()
                + "New network location: "
                + String.format("%9.6f", location.getLatitude()) + ", "
                + String.format("%9.6f", location.getLongitude()) + "\n");
    }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    textView = (TextView) findViewById(R.id.textview);
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
}

@Override
protected void onResume() {
    super.onResume();
    locationManager.requestLocationUpdates(
            LocationManager.NETWORK_PROVIDER, 5000, 0,
            networkLocationListener);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
            3000, 0, gpsLocationListener);
}

@Override
protected void onPause() {
    super.onPause();
    locationManager.removeUpdates(networkLocationListener);
    locationManager.removeUpdates(gpsLocationListener);
}
}
于 2013-06-05T08:41:29.050 に答える
1

新しいGoogleMapsAPIでは、OnMyLocationChangeListenerが導入されています。
LocationListenerを実装する必要はありません。この答えを確認してください：https ：//stackoverflow.com/a/16240460/1769013

于 2013-06-05T08:49:37.267 に答える
0

応答がないまま2か月近く経った後、私は次のように機能することにしました。
他の人が時間を節約するのに役立つことを願っています。

public class GpsLocationService extends Service implements LocationListener{

    private final String TAG = getClass().getSimpleName();

    private LocationManager locationManager;
    private String provider;

    @Override
    public void onCreate() {
        super.onCreate();
        Log.i(TAG, "onCreate()");
        // Get the location manager
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        // Define the criteria how to select the locatioin provider -> use
        // default
        Criteria criteria = new Criteria();
        provider = locationManager.getBestProvider(criteria, false);
        Location location = locationManager.getLastKnownLocation(provider);

        // Initialize the location fields
        if (location != null) {
            Log.d(TAG, "Provider " + provider + " has been selected.");
            onLocationChanged(location);
        } 
        else {
            Log.d(TAG, "Location not available!");
        }

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.i(TAG, "GpsLocationService has started!");


        locationManager.requestLocationUpdates(provider, 400, 1, this);

        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        Log.i(TAG, "GpsLocationService is destroyed!");
        super.onDestroy();
        locationManager.removeUpdates(this);
    }

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }



    @Override
    public void onLocationChanged(Location location) {
        double lat = location.getLatitude();
        double lng =  location.getLongitude();
        Log.i( TAG, "onLocationChanged() lat = " + lat + " long = " + lng);     
    }

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

    }

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

    }

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

    }

}

また、マニフェストファイルに次の権限を追加することを忘れないでください。

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

あなたのサービスにも言及してください：

<service android:name=".GpsLocationService"></service>
于 2013-05-16T07:18:55.857 に答える