Android M permission grant callback

Question

I am testing the permission system on the Android M Dev Preview. I have a question about the callback function. The Activity class has a new API:

public void onRequestPermissionsResult (int requestCode, 
               String[] permissions, int[] grantResults) { }

I want to ask why are permissions and grantResults arguments defined as arrays ? I know that multiple permissions can be asked at the same time using requestPermissions(), but if a request code is used for a permission set of request, wouldn't it suffice to just have an integer grantResults (not sure about permissions argument) ?

Answer 1

Work for me

Check and Request for permission

if ( ContextCompat.checkSelfPermission( this, android.Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) {


            if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                    android.Manifest.permission.ACCESS_COARSE_LOCATION )) {

                // Show an expanation 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[]{android.Manifest.permission.ACCESS_COARSE_LOCATION },
                        MY_PERMISSIONS_REQUEST_ACCESS_LOCATION);

                // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
                // app-defined int constant. The callback method gets the
                // result of the request.
            }

            return;
        }

Callback

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

                } 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
        }
    }