Android permissions: Perform task after user pressed "Allow"

Question

I would like to know if there is a way we can identify the event when the user has pressed "Allow" button for contact details access/ calendar access etc.,

I know there is a way to ask for permissions with the ActivityCompat.requestPermissions but is there a way to perform an action right after the user grants a permission?

Answer 1

First Define the variable:

public static int MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;

…then use the following code copied from http://web.archive.org/web/20160111030837/http://developer.android.com/training/permissions/requesting.html —

request permission using:

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.
    } }

now catch the result using:

     @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.
                Toast.makeText(getApplicationContext(), "Permission granted", Toast.LENGTH_SHORT).show();

            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(getApplicationContext(), "Permission denied", Toast.LENGTH_SHORT).show();
            }
            return;
        }

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

FOR FRAGMENT

if you are trying this code in a fragment, change

checkSelfPermission()

to

ActivityCompact.checkSelfPermission()

and Also change

ActivityCompat.requestPermissions()

to

requestPermissions()

Handling of Permission Result (Allow or Deny) are same as activity.

For a More Complete Example See This Answer Here