Android runtime permissions- how to implement

Question

Android Developer Documentation gives this example of requesting permissions at runtime:

// Here, thisActivity is the current activity
if (ContextCompat.chec         


        

Answer 1

Look just a little further down in the documentation under "Handle the permissions request response" and you will see its purpose.

A callback method called onRequestPermissionsResult gets sent back the same code as a parameter so you know which permission was being requested/granted:

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

Since the constant is used by you only you can give it whatever value you like as a public static final int. Each permission being requested needs its own constant.