HeyPermission.requestPermissions(this, requestCode, permission);

    // 权限被永久拒绝后的回调。建议在 BaseActivity 或 BaseFragment 中统一处理。
    @PermissionsNeverAskAgain
    public void onPermissionNeverAskAgain(int requestCode) {
        PermissionDialogs.showDefaultAppSettingsDialog(this, requestCode);
    }

    @PermissionsDenied
    public void onPermissionDenied() {
        Toast.makeText(this, R.string.msg_you_denied_the_permission_request, Toast.LENGTH_SHORT).show();
    }

    // 实现了 RationaleCallback 接口后会回调此方法，返回 true 表示已弹出提示权限重要性的对话框。
    @Override
    public boolean onShowRationale(PermissionRequestExecutor executor, int requestCode,
                                   String[] permissions, boolean callOnResult) {
        if (!callOnResult) {
            PermissionDialogs.showDefaultRationaleDialog(this, executor, requestCode, permissions);
            return true;
        }
        return false;
    }

    // 必须在此回调中调用 HeyPermission.onRequestPermissionsResult(this, requestCode, permissions, grantResults);
    // 建立在 BaseActivity 或 BaseFragment 中重写此方法。
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                           @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        HeyPermission.onRequestPermissionsResult(this, requestCode, permissions, grantResults);
    }