MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION permission android not recognised in code

问题

We are currently trying to request GPS permissions from an android phone so that we can show the current location on a Google Map. We have included this manifest, outside of application tags, under the manifest tag:

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

Here is the part of our code that is not working, it is not recognising MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION:

 if (ActivityCompat.checkSelfPermission(this,
            android.Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED) {
        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                android.Manifest.permission.ACCESS_FINE_LOCATION)) {
            // Show an explanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.
        } else {
            // No explanation needed, we can request the permission.
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
            // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
            // app-defined int constant. The callback method gets the
            // result of the request.
        }
    }

We have also included "import android.Manifest".

Thanks in advance!

回答1:

you have to define it like:

public static int MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION =1;

then catch the result as:

    @Override
public void onRequestPermissionsResult(int requestCode,
        String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION : {
            // 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.

            } else {

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

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

来源：https://stackoverflow.com/questions/41613511/my-permissions-request-access-fine-location-permission-android-not-recognised-in