project_telephony/lib/ui/user/privacy_rights_page.dart

import 'package:flutter/material.dart';
import 'package:permission_handler_platform_interface/permission_handler_platform_interface.dart';
import 'package:project_telephony/base/base_style.dart';
import 'package:project_telephony/ui/widget/plone_back_button.dart';
import 'package:project_telephony/utils/headers.dart';
import 'package:telephony/telephony.dart';

class PrivacyRightsPage extends StatefulWidget {
  final String name;

  const PrivacyRightsPage({Key? key, required this.name}) : super(key: key);

  @override
  _PrivacyRightsPageState createState() => _PrivacyRightsPageState();
}

final Telephony telephony = Telephony.instance;
// late final bool permissionsGranted;
// String body = "";
// @override
// void initState() async {
//   initPlatformState();
// }
class _PrivacyRightsPageState extends State<PrivacyRightsPage> {
  final Permission _permission = Permission.phone;
  final PermissionHandlerPlatform _permissionHandler =
      PermissionHandlerPlatform.instance;
  PermissionStatus _permissionStatus = PermissionStatus.denied;

  Future<void> requestPermission(Permission permission) async {
    final status = await _permissionHandler.requestPermissions([permission]);
    setState(() {
      _permissionStatus = status[permission] ?? PermissionStatus.denied;
    });
  }

  @override
  void initState() {
    super.initState();
    _listenForPermissionStatus();
  }

  void _listenForPermissionStatus() async {
    final status = await _permissionHandler.checkPermissionStatus(_permission);
    setState(() => _permissionStatus = status);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
          elevation: 0,
          title: Text(
            widget.name,
            style: TextStyle(
                fontSize: BaseStyle.fontSize34,
                color: BaseStyle.color333333,
                fontWeight: FontWeight.bold),
          ),
          titleSpacing: 162.w,
          leading: const CloudBackButton(isSpecial: true),
          backgroundColor: kForeGroundColor),
      backgroundColor: Colors.white,
      body: widget.name == "隐私政策" ? null : _getRights(true),
    );
  }

  // onMessage(SmsMessage message) async {
  //   setState(() {
  //     body = message.body ?? "error reading message body.";
  //     print(body);
  //   });
  // }
  //
  // onSendStatus(SendStatus status) {
  //   setState(() {
  //     body = status == SendStatus.SENT ? "sent" : "delivered";
  //   });
  // }
  //
  // Future<void> initPlatformState() async {
  //   final bool? result = await telephony.requestPhoneAndSmsPermissions;
  //   if (result != null && result) {
  //     telephony.listenIncomingSms(
  //         onNewMessage: onMessage,
  //         onBackgroundMessage: onBackgroundMessage,
  //         listenInBackground: true);
  //   }
  //   if (!mounted) return;
  // }
  _getRights(bool pd) {
    return ListView(
        children: Permission.values 
            .where((permission) {
          return permission == Permission.phone ||
              permission == Permission.sms;
        })
            .map((permission) => PermissionWidget(permission))
            .toList());
  }
}

class PermissionWidget extends StatefulWidget {
  const PermissionWidget(this._permission);

  final Permission _permission;

  @override
  _PermissionState createState() => _PermissionState(_permission);
}

class _PermissionState extends State<PermissionWidget> {
  _PermissionState(this._permission);

  final Permission _permission;
  final PermissionHandlerPlatform _permissionHandler =
      PermissionHandlerPlatform.instance;
  PermissionStatus _permissionStatus = PermissionStatus.denied;
  List<String> title = [
    "获取来电权限",
    "获取短信权限",
  ];
  List<String> sub = [
    "用于监听来电状态",
    "用于发送短信",
  ];

  @override
  void initState() {
    super.initState();

    _listenForPermissionStatus();
  }

  void _listenForPermissionStatus() async {
    final status = await _permissionHandler.checkPermissionStatus(_permission);
    setState(() => _permissionStatus = status);
  }

  Color getPermissionColor() {
    switch (_permissionStatus) {
      case PermissionStatus.denied:
        return Colors.red;
      case PermissionStatus.granted:
        return Colors.green;
      case PermissionStatus.limited:
        return Colors.orange;
      default:
        return Colors.grey;
    }
  }

  String getPermissionStu() {
    switch (_permissionStatus) {
      case PermissionStatus.denied:
        return "未允许";
      case PermissionStatus.granted:
        return "已允许";
      default:
        return "未允许";
    }
  }

  @override
  Widget build(BuildContext context) {
    return ListTile(
      title: Text(
        _permission.value==8?title[0]:title[1],
        style: Theme.of(context).textTheme.titleMedium,
      ),
      subtitle: Text(
        _permission.value==8?sub[0]:sub[1],
      ),
      trailing: Wrap(
        children: [
          Text(getPermissionStu(),
              style: TextStyle(color: getPermissionColor())),
          const Icon(Icons.arrow_forward_ios),
        ],
      ),
      onTap: () {
        requestPermission(_permission);
      },
    );
  }

  void checkServiceStatus(
      BuildContext context, PermissionWithService permission) async {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text(
          (await _permissionHandler.checkServiceStatus(permission)).toString()),
    ));
  }

  Future<void> requestPermission(Permission permission) async {
    final status = await _permissionHandler.requestPermissions([permission]);

    setState(() {
      print(status);
      _permissionStatus = status[permission] ?? PermissionStatus.denied;
      print(_permissionStatus);
    });
  }
}