Base method for handling M permissions

Base method

  /**
     * Handle M permission
     * @param permission - permission name
     * @param requestCode - permission's request code to handle in onRequestPermissionsResult
     */
    protected void handlePermissions(String permission, final int requestCode) {
        int statePermissionCheck = ContextCompat.checkSelfPermission(this, permission);
        if (PackageManager.PERMISSION_GRANTED == statePermissionCheck) {
            onPermissionGranted(permission);
        } else {
            final String[] permissions = {permission};
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, permission)) {
                onPermissionRationale(permissions, requestCode);
            } else {
                requestPermission(permissions, requestCode);
            }
        }
    }


    protected void onPermissionRationale(String[] permission, int requestCode) {
    }

    protected void onPermissionGranted(String permission) {
    }

    protected void requestPermission(String[] permissions, int requestCode) {
        ActivityCompat.requestPermissions(this, permissions, requestCode);
    }
    

Example

 /**
     * Default method for handling result of permissions request
     */
 @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[],
                                           int[] grantResults) {
        switch (requestCode) {
            case REQUEST_READ_PHONE_STATE:
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                  // do smth
                }
                break;
        }
    }
    
    @Override
    protected void onPermissionGranted(String permission) {
        switch (permission) {
            case Manifest.permission.READ_PHONE_STATE:
                // do smth if permission is granted
                break;
        }
    }
    
     @Override
    public void onPermissionRationale(final String[] permissions, final int requestCode) {
        switch (requestCode) {
            case REQUEST_READ_PHONE_STATE:
            // implement your logic of request rationale , for example:
                showSnackbar(getString(R.string.label_autodetect_phone),
                        getString(R.string.label_allow),
                        new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                requestPermission(permissions, requestCode);
                            }
                        }, Snackbar.LENGTH_INDEFINITE);
        }
    }