Java 该应用程序在安装后第一次运行良好，但之后，即使gps已打开，也会继续要求打开gps

安装该应用程序后，您将看到该应用程序在第一次将位置显示为toast消息时工作正常，但当您再次尝试使用它时，它会要求打开gps，即使gps已打开。信息：我正在为android版本6开发一个应用程序。位置代码在以下版本（如android kitkat）中运行良好。请帮我修一下这个(

HomeActivity.java

package info.androidhive.fingerprint;
import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.widget.Toast;
public class HomeActivity extends Activity {

Context mContext;
GPSTracker gps= new GPSTracker(mContext);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

            mContext = this;
            if (ContextCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(HomeActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

            } else {
                Toast.makeText(mContext, "You need to grant permission", Toast.LENGTH_SHORT).show();


                // Check if GPS enabled
                if (gps.canGetLocation()) {

                    double latitude = gps.getLatitude();
                    double longitude = gps.getLongitude();

                    // \n is for new line
                    Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
                } else {
                    // Can't get location.
                    gps = new GPSTracker(mContext, HomeActivity.this); // GPS or network is not enabled.
                    // Ask user to enable GPS/network in settings.
                    gps.showSettingsAlert();
                }
            }
        }

        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);

            switch (requestCode) {
                case 1: {
                    // If request is cancelled, the result arrays are empty.
                    if (grantResults.length > 0
                            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                        // permission was granted, yay! Do the

                        // contacts-related task you need to do.

                       gps = new GPSTracker(mContext, HomeActivity.this);

                        // Check if GPS enabled
                        if (gps.canGetLocation()) {

                            double latitude = gps.getLatitude();
                            double longitude = gps.getLongitude();

                            // \n is for new line
                            Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
                        } else {
                            // Can't get location.
                            // GPS or network is not enabled.
                            // Ask user to enable GPS/network in settings.
                            gps.showSettingsAlert();
                        }

                    } else {

                        // permission denied, boo! Disable the
                        // functionality that depends on this permission.

                        Toast.makeText(mContext, "You need to grant permission", Toast.LENGTH_SHORT).show();
                    }
                }
            }
        }
}

package info.androidhive.fingerprint;

/*
Created by sal on 12/4/17.
*/

import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
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.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
public class GPSTracker extends Service{

private  Context mContext;

// Flag for GPS status
boolean isGPSEnabled = false;

// Flag for network status
boolean isNetworkEnabled = false;

// Flag for GPS status
boolean canGetLocation = false;

Location location; // Location
double latitude; // Latitude
double longitude; // Longitude

// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000; // 10 meters

// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60; // 1 minute

// Declaring a Location Manager
protected LocationManager locationManager;

Activity activity;


public GPSTracker(Context context, Activity activity) {
    this.mContext = context;
    this.activity = activity;
    getLocation();
}

public GPSTracker(Context abc) {
    this.mContext=abc;
}

public Location getLocation() {
    try {


        locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);

        // Getting GPS status
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // Getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (!isGPSEnabled && !isNetworkEnabled) {
            // No network provider is enabled
            this.canGetLocation=false;
        } else {
            this.canGetLocation = true;
            if (isNetworkEnabled) {


                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, mLocationListener);
                Log.d("Network", "Network");
                if (locationManager != null) {
                    location = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) {
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    }
                }
            }
        }
        // If GPS enabled, get latitude/longitude using GPS Services
        if (isGPSEnabled) {
            if (location == null) {
                if (ContextCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 50);

                } else {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, mLocationListener);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null) {

                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }

        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return location;
}


/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app.
 * */
public void stopUsingGPS() {

}


private final LocationListener mLocationListener = new LocationListener() {
    @Override
    public void onLocationChanged(final Location location) {

        if (location != null) {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
        }
    }

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

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }
};

/**
 * Function to get latitude
 * */
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;
}

/**
 * Function to check GPS/Wi-Fi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}


/**
 * Function to show settings alert dialog.
 * On pressing the Settings button it will launch Settings Options.
 * */
public void showSettingsAlert() {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

    // On pressing the Settings button.
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });

    // On pressing the cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });

    // Showing Alert Message
    alertDialog.show();
}


@Override
public IBinder onBind(Intent arg0) {
    return null;
}
}

GPSTracker.java

package info.androidhive.fingerprint;
import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.widget.Toast;
public class HomeActivity extends Activity {

Context mContext;
GPSTracker gps= new GPSTracker(mContext);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

            mContext = this;
            if (ContextCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(HomeActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

            } else {
                Toast.makeText(mContext, "You need to grant permission", Toast.LENGTH_SHORT).show();


                // Check if GPS enabled
                if (gps.canGetLocation()) {

                    double latitude = gps.getLatitude();
                    double longitude = gps.getLongitude();

                    // \n is for new line
                    Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
                } else {
                    // Can't get location.
                    gps = new GPSTracker(mContext, HomeActivity.this); // GPS or network is not enabled.
                    // Ask user to enable GPS/network in settings.
                    gps.showSettingsAlert();
                }
            }
        }

        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);

            switch (requestCode) {
                case 1: {
                    // If request is cancelled, the result arrays are empty.
                    if (grantResults.length > 0
                            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                        // permission was granted, yay! Do the

                        // contacts-related task you need to do.

                       gps = new GPSTracker(mContext, HomeActivity.this);

                        // Check if GPS enabled
                        if (gps.canGetLocation()) {

                            double latitude = gps.getLatitude();
                            double longitude = gps.getLongitude();

                            // \n is for new line
                            Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
                        } else {
                            // Can't get location.
                            // GPS or network is not enabled.
                            // Ask user to enable GPS/network in settings.
                            gps.showSettingsAlert();
                        }

                    } else {

                        // permission denied, boo! Disable the
                        // functionality that depends on this permission.

                        Toast.makeText(mContext, "You need to grant permission", Toast.LENGTH_SHORT).show();
                    }
                }
            }
        }
}

package info.androidhive.fingerprint;

/*
Created by sal on 12/4/17.
*/

import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
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.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
public class GPSTracker extends Service{

private  Context mContext;

// Flag for GPS status
boolean isGPSEnabled = false;

// Flag for network status
boolean isNetworkEnabled = false;

// Flag for GPS status
boolean canGetLocation = false;

Location location; // Location
double latitude; // Latitude
double longitude; // Longitude

// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000; // 10 meters

// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60; // 1 minute

// Declaring a Location Manager
protected LocationManager locationManager;

Activity activity;


public GPSTracker(Context context, Activity activity) {
    this.mContext = context;
    this.activity = activity;
    getLocation();
}

public GPSTracker(Context abc) {
    this.mContext=abc;
}

public Location getLocation() {
    try {


        locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);

        // Getting GPS status
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // Getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (!isGPSEnabled && !isNetworkEnabled) {
            // No network provider is enabled
            this.canGetLocation=false;
        } else {
            this.canGetLocation = true;
            if (isNetworkEnabled) {


                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, mLocationListener);
                Log.d("Network", "Network");
                if (locationManager != null) {
                    location = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) {
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    }
                }
            }
        }
        // If GPS enabled, get latitude/longitude using GPS Services
        if (isGPSEnabled) {
            if (location == null) {
                if (ContextCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 50);

                } else {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, mLocationListener);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null) {

                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }

        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return location;
}


/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app.
 * */
public void stopUsingGPS() {

}


private final LocationListener mLocationListener = new LocationListener() {
    @Override
    public void onLocationChanged(final Location location) {

        if (location != null) {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
        }
    }

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

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }
};

/**
 * Function to get latitude
 * */
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;
}

/**
 * Function to check GPS/Wi-Fi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}


/**
 * Function to show settings alert dialog.
 * On pressing the Settings button it will launch Settings Options.
 * */
public void showSettingsAlert() {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

    // On pressing the Settings button.
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });

    // On pressing the cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });

    // Showing Alert Message
    alertDialog.show();
}


@Override
public IBinder onBind(Intent arg0) {
    return null;
}
}

Android清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="info.androidhive.fingerprint">

<uses-permission android:name="android.permission.USE_FINGERPRINT" />
<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" />
<uses-feature android:name="android.hardware.location.gps" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".FingerprintActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".HomeActivity"
        android:label="@string/title_activity_home"
        android:theme="@style/AppTheme" />
</application>

</manifest>

您正在使用 ActivityCompat.requestPermissions（活动，新字符串[]{Manifest.permission.ACCESS\u FINE\u LOCATION}，50）

只能打开“精细位置”。 在这条线下划一条线

ActivityCompat.requestPermissions（活动，新字符串[]{Manifest.permission.ACCESS_\u LOCATION}，50）

---

它将使用Google服务的LocationManager类检查GPS状态：-

compile 'com.google.android.gms:play-services:9.8.0'

//GPS演示课

import android.Manifest;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.v13.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import android.widget.Toast;

/**
 * Created by admin on 18-Apr-17.
 */

public class DemoActivity extends BaseActivity {

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

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            checkLocationPermission(); //Step 1
        }

        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            Log.e("GPS setting is ", locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) + "");
            buildAlertMessageNoGps();
        } else {
            Log.e("GPS setting is ", locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) + "");
        }
    }

    private void buildAlertMessageNoGps() {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(getResources().getString(R.string.alertdialog_content))
                .setCancelable(false)
                .setPositiveButton("Setting", new DialogInterface.OnClickListener() {
                    public void onClick(@SuppressWarnings("unused") final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
                        startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
                        Toast.makeText(DemoActivity.this, getResources().getString(R.string.alertdialog_cancel_message), Toast.LENGTH_LONG).show();
                        dialog.cancel();
                    }
                });
        final AlertDialog alert = builder.create();
        alert.show();
    }

    public boolean checkLocationPermission() {
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 100);
            return false;
        } else {
            return true;
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
    }

    @Override
    protected void onPause() {
        super.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 100:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Log.e(getClass().getSimpleName(), permissions[0] + " Granted...");
                } else {
                    Toast.makeText(this, "Application may not function properly if you deny permission, Please allow Location permission from app settings", Toast.LENGTH_LONG).show();
                    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 100); // you can request again if user deny location request else your logic here
                }
                break;
        }
    }
}

屏幕截图

1-请求打开GPS

2-全球定位系统状态

3-从设置启用位置

4-普惠制地位

---

我做了，但没有成功。ActivityCompat.requestPermissions（activity，新字符串[]{Manifest.permission.ACCESS\u FINE\u LOCATION}，50）；ActivityCompat.requestPermissions（activity，新字符串[]{Manifest.permission.ACCESS\u LOCATION}，50）；请帮助！如果您需要更多信息，请询问我。您希望我在何处更改代码以及我是否需要更新依赖项？请帮助！如果您需要更多信息，请询问我。将locationmanager行放入onCreate（）中方法，并使用LocationManager类进行检查，并设置日志以检查其响应打开GPS后，将需要一些时间检索您当前的位置请尝试上面的代码，如果您不理解，请告诉我。为了方便您，我制作了一个简单的演示，请尝试了解每个步骤。