java - lastKnownLocation を使用すると、緯度と経度は常に 0.0 を返します

Question

ライブラリ Let を介してアクセス許可を処理しましたが、まだ Android アプリで経度と緯度を取得できません。GPS_Service.java というサービスを使用しています。また、自分のパーミッションが問題ではないことを 100% 確信しているわけではありません。GPS_Service での Google API の呼び出しには、拒否される可能性があるアクセス許可が必要であるという警告が引き続き下線が引かれています。それはサードパーティのライブラリでもなくなるはずですか? 私のデバイスではアプリで位置情報の利用許可が有効になっているため、これはまだ問題になりますか?

ここに私の主な活動があります：

package com.example.paxie.stormy.ui;

import android.Manifest;
import android.annotation.TargetApi;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.canelmas.let.AskPermission;
import com.canelmas.let.DeniedPermission;
import com.canelmas.let.Let;
import com.canelmas.let.RuntimePermissionListener;
import com.canelmas.let.RuntimePermissionRequest;
import com.example.paxie.stormy.GPS_Service;
import com.example.paxie.stormy.R;
import com.example.paxie.stormy.weather.Current;
import com.example.paxie.stormy.weather.Day;
import com.example.paxie.stormy.weather.Forecast;
import com.example.paxie.stormy.weather.Hour;
import com.google.android.gms.maps.model.LatLng;
import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class MainActivity extends AppCompatActivity implements RuntimePermissionListener {

    public static final String TAG = MainActivity.class.getSimpleName();
    public static final String DAILY_FORECAST = "DAILY_FORECAST";
    public static final String HOURLY_FORECAST = "HOURLY_FORECAST";
    private Forecast mForecast;
    private double mLatitude;
    private double mLongitude;
    private BroadcastReceiver broadcastReceiver;
    private Location location; // location
    private double latitude; // latitude
    private double longitude; // longitude
    private Context mContext;

    @BindView(R.id.timeLabel)
    TextView mTimeLabel;
    @BindView(R.id.temperatureLabel)
    TextView mTemperatureLabel;
    @BindView(R.id.humidityValue)
    TextView mHumidityValue;
    @BindView(R.id.precipValue)
    TextView mPrecipValue;
    @BindView(R.id.summaryLabel)
    TextView mSummaryLabel;
    @BindView(R.id.iconImageView)
    ImageView mIconImageView;
    @BindView(R.id.refreshImageView)
    ImageView mRefreshImageView;
    @BindView(R.id.progressBar)
    ProgressBar mProgressBar;
    @BindView(R.id.locationLabel)
    TextView mLocationlabel;

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        Let.handle(this, requestCode, permissions, grantResults);
    }

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


        mProgressBar.setVisibility(View.INVISIBLE);

        mRefreshImageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getForecast();
            }
        });


        getForecast();
        Log.d(TAG, "Main UI code is running!");
    }

    private void getForecast() {
        checkGPS();
        String apiKey = "1621390f8c36997cb1904914b726df52";
        String forecastUrl = "https://api.forecast.io/forecast/" + apiKey +
                "/" + mLatitude + "," + mLongitude;

        if (isNetworkAvailable()) {
            toggleRefresh();

            OkHttpClient client = new OkHttpClient();
            Request request = new Request.Builder()
                    .url(forecastUrl)
                    .build();

            Call call = client.newCall(request);
            call.enqueue(new Callback() {
                @Override
                public void onFailure(Request request, IOException e) {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            toggleRefresh();
                        }
                    });
                    alertUserAboutError();
                }

                @Override
                public void onResponse(Response response) throws IOException {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            toggleRefresh();
                        }
                    });
                    try {
                        String jsonData = response.body().string();
                        Log.v(TAG, jsonData);
                        if (response.isSuccessful()) {
                            mForecast = parseForecastDetails(jsonData);
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    updateDisplay();
                                }
                            });

                        } else {
                            alertUserAboutError();

                        }
                    } catch (IOException e)

                    {
                        Log.e(TAG, "Exception caught: ", e);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });
        } else {
            Toast.makeText(this, "Network is currently unavailable!", Toast.LENGTH_LONG).show();
        }
    }


    private void toggleRefresh() {
        if (mProgressBar.getVisibility() == View.INVISIBLE) {
            mProgressBar.setVisibility(View.VISIBLE);
            mRefreshImageView.setVisibility(View.INVISIBLE);
        } else {
            mProgressBar.setVisibility(View.INVISIBLE);
            mRefreshImageView.setVisibility(View.VISIBLE);
        }
    }

    private void updateDisplay() {
        mLocationlabel.setText(mLatitude + " " + mLongitude);
        Current current = mForecast.getCurrent();
        mTemperatureLabel.setText(current.getTemperature() + "");
        mTimeLabel.setText("At " + current.getFormattedTime() + " it will be:");
        mHumidityValue.setText(current.getHumidity() + "");
        mPrecipValue.setText(current.getPrecipChance() + "%");
        mSummaryLabel.setText(current.getSummary());
        Drawable drawable = ContextCompat.getDrawable(this, current.getIconId());
        mIconImageView.setImageDrawable(drawable);
    }

    private Forecast parseForecastDetails(String jsonData) throws JSONException {
        Forecast forecast = new Forecast();
        forecast.setCurrent(getCurrentDetails(jsonData));
        forecast.setHourlyForecast(getHourlyForecast(jsonData));
        forecast.setDailyForecast(getDailyForecast(jsonData));

        return forecast;

    }

    private Day[] getDailyForecast(String jsonData) throws JSONException {
        JSONObject forecast = new JSONObject(jsonData);
        String timezone = forecast.getString("timezone");
        JSONObject daily = forecast.getJSONObject("daily");
        JSONArray data = daily.getJSONArray("data");

        Day[] days = new Day[data.length()];

        for (int i = 0; i < data.length(); i++) {
            JSONObject jsonDay = data.getJSONObject(i);
            Day day = new Day();

            day.setSummary(jsonDay.getString("summary"));
            day.setIcon(jsonDay.getString("icon"));
            day.setTemperatureMax(jsonDay.getDouble("temperatureMax"));
            day.setTime(jsonDay.getLong("time"));
            day.setTimeZone(timezone);

            days[i] = day;

        }
        return days;
    }

    private Hour[] getHourlyForecast(String jsonData) throws JSONException {
        JSONObject forecast = new JSONObject(jsonData);
        String timezone = forecast.getString("timezone");
        JSONObject hourly = forecast.getJSONObject("hourly");
        JSONArray data = hourly.getJSONArray("data");

        Hour[] hours = new Hour[data.length()];

        for (int i = 0; i < data.length(); i++) {
            JSONObject jsonHour = data.getJSONObject(i);
            Hour hour = new Hour();
            hour.setSummary(jsonHour.getString("summary"));
            hour.setTemperature(jsonHour.getDouble("temperature"));
            hour.setIcon(jsonHour.getString("icon"));
            hour.setTime(jsonHour.getLong("time"));
            hour.setTimeZone(timezone);

            hours[i] = hour;

        }
        return hours;
    }

    private Current getCurrentDetails(String jsonData) throws JSONException {
        JSONObject forecast = new JSONObject(jsonData);
        String timezone = forecast.getString("timezone");
        Log.i(TAG, "From JSON:  " + timezone);

        JSONObject currently = forecast.getJSONObject("currently");
        Current current = new Current();
        current.setHumidity(currently.getDouble("humidity"));
        current.setTime(currently.getLong("time"));
        current.setIcon(currently.getString("icon"));
        current.setPrecipChance(currently.getDouble("precipProbability"));
        current.setSummary(currently.getString("summary"));
        current.setTemperature(currently.getDouble("temperature"));
        current.setTimeZone(timezone);

        Log.d(TAG, current.getFormattedTime());

        return current;
    }

    private boolean isNetworkAvailable() {
        ConnectivityManager manager = (ConnectivityManager)
                getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        boolean isAvailable = false;
        if (networkInfo != null && networkInfo.isConnected()) {
            isAvailable = true;
        }
        return isAvailable;
    }


    private void alertUserAboutError() {
        AlertDialogFragment dialog = new AlertDialogFragment();
        dialog.show(getFragmentManager(), "error_dialog");
    }


    @OnClick(R.id.dailyButton)
    public void startDailyActivity(View view) {
        Intent intent = new Intent(this, DailyForecastActivity.class);
        intent.putExtra(DAILY_FORECAST, mForecast.getDailyForecast());
        startActivity(intent);

    }

    @OnClick(R.id.hourlyButton)
    public void startHourlyActivity(View view) {
        Intent intent = new Intent(this, HourlyForecastActivity.class);
        intent.putExtra(HOURLY_FORECAST, mForecast.getHourlyForecast());
        startActivity(intent);
    }
@AskPermission({Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION})
    private void checkGPS() {
        GPS_Service gps_service = new GPS_Service(this);
        gps_service.getLocation();
        mLatitude = gps_service.getLatitude();
        mLongitude = gps_service.getLongitude();
    }

    @Override
    public void onShowPermissionRationale(List<String> permissionList, RuntimePermissionRequest permissionRequest) {

    }

    @Override
    public void onPermissionDenied(List<DeniedPermission> deniedPermissionList) {
    }
}

そして、ここに私の GPS_Service.java があります:

package com.example.paxie.stormy;

import android.*;
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import com.canelmas.let.AskPermission;
import com.canelmas.let.DeniedPermission;
import com.canelmas.let.Let;
import com.canelmas.let.RuntimePermissionListener;
import com.canelmas.let.RuntimePermissionRequest;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by paxie on 10/27/16.
 */

public class GPS_Service extends Service implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {

    private Location location; // location
    private double latitude; // latitude
    private double longitude; // longitude
    private GoogleApiClient mGAC;
    private Context mContext;
    public static final String TAG = "GPSresource";
    private static final int RC_GPS_PERMS = 124;
    public String[] perm = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION};

    public GPS_Service(Context c) {
        mContext = c;
        try {
            buildGoogleApiClient();
            mGAC.connect();
        } catch (Exception e) {
            Log.d(TAG, e.toString());
        }
    }



    protected synchronized void buildGoogleApiClient() {
        mGAC = new GoogleApiClient.Builder(mContext)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }


    public double getLatitude() {
        if (location != null) {
            latitude = location.getLatitude();
        }

        // return latitude
        return latitude;
    }

    /**
     * Function to get longitude
     */
    public double getLongitude() {
        if (location != null) {
            longitude = location.getLongitude();
        }

        // return longitude
        return longitude;
    }

    @Override
    public void onConnected(Bundle bundle) {

    }


    @Override
    public void onConnectionSuspended(int i) {

    }


    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }

    public void getLocation() {
        location = LocationServices.FusedLocationApi.getLastLocation(mGAC);
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

score 0 · Accepted Answer

その場合は、GPS を有効にして Google マップに移動し、場所ボタンを押して、Google マップがあなたを見つけるまで待ってから、戻ってアプリでテストしてください。これは機能するはずです。なぜなら、GPS に一度も接続されていない電話を初めて使用している場合、その問題が発生するからです。

java - lastKnownLocation を使用すると、緯度と経度は常に 0.0 を返します

2 に答える 2

Related

Reference