在android中獲得運行時權限

[英]Getting permission on runtime in android


I'm new to android, don't know what I'm doing wrong this class get longitude and latitude and sent to another class the code is throwing an error onrequstpermission please tell me what to do how to do:

我是android的新手,不知道我做錯了這個類得到經度和緯度並發送到另一個類代碼拋出錯誤onrequstpermission請告訴我該怎么做:

error on public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults

public void onRequestPermissionsResult上的錯誤(int requestCode,String [] permissions,int [] grantResults

public class GPSTracker extends Service implements LocationListener {

private final 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 = 10; // 10 meters

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

// Declaring a Location Manager
protected LocationManager locationManager;

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

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
        } else {
            this.canGetLocation = true;
            // First get location from Network Provider
            if (isNetworkEnabled) {
                if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
                        switch (requestCode) {
                            case Manifest.permission.ACCESS_COARSE_LOCATION:
                                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                                    // All good!
                                } else {
                                    Toast.makeText(this, "Need your location!", Toast.LENGTH_SHORT).show();
                                }

                                break;
                        }
                    }
                }
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                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 lat/long using GPS Services
            if (isGPSEnabled) {
                if (location == null) {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    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(){
    if(locationManager != null){
        locationManager.removeUpdates(GPSTracker.this);
    }
}

/**
 * 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/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}

/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch 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 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 cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });

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

@Override
public void onLocationChanged(Location location) {
}

@Override
public void onProviderDisabled(String provider) {
}

@Override
public void onProviderEnabled(String provider) {
}

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

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

1 个解决方案

#1


2  

onRequestPermissionsResult is a method which should be outside the current method

onRequestPermissionsResult是一個應該在當前方法之外的方法

public Location getLocation(){
    //...code
      if (ActivityCompat.checkSelfPermissio... ) {

    // ERROR : cannot have function declaration inside another function
          public void onRequestPermissionsResult(...) {
                switch (requestCode) {//..code}
          }
}

Note: you cannot have this in a Service class , you need some Activity to ask permission

注意:你不能在Service類中擁有它,你需要一些Activity來詢問權限

ActivityCompat.OnRequestPermissionsResultCallback is implemented by FragmentActivity which is a parent of AppCompatActivity so it's not implemented by Service so you need to implement the runtime-permission code is some FragmentActivity | AppCompatActivity or you can check and show a notification (in case of no permission or probably a dialog) and redirect user to Activity to proceed with permission code.

ActivityCompat.OnRequestPermissionsResultCallback由FragmentActivity實現,它是AppCompatActivity的父級,所以它不是由Service實現的,所以你需要實現運行時權限代碼是一些FragmentActivity | AppCompatActivity或您可以檢查並顯示通知(如果沒有權限或可能是對話框)並將用戶重定向到Activity以繼續權限代碼。

Reference: Implement runtime permission

參考:實現運行時權限


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