无法在颤振应用程序中使用contacts_service添加联系人
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【中文标题】无法在颤振应用程序中使用contacts_service添加联系人【英文标题】:Not able to add contact using contacts_service in flutter app 【发布时间】:2020-09-17 17:28:59 【问题描述】:实际上,我正在构建一个读卡器应用程序,其中数据来自 ML 模型并存储在 mycontrollers 函数中。但是在使用 ContactsService.addContact(contact);我收到错误。虽然联系人保存在应用程序中,但没有保存在手机的联系人列表中。
代码:
void saveContactInPhone()
try
print("saving Conatct");
Contact contact = Contact();
print("fi");
contact.displayName = myController1.text ;
contact.phones = [Item(label: "mobile", value: myController4.text)];
// contact.emails = [Item(label: "email", value: myController3.text)];
contact.company = myController2.text;
print("fi2");
ContactsService.addContact(contact);
print("object");
catch (e)
print(e);
错误:
I/flutter ( 1615): form init
我/颤振(1615):/data/user/0/com.example.camera_app/app_flutter/2020-05-29 23:35:12.398628.png 我/颤动(1615):图像 我/颤振(1615):404 I/颤动(1615):图像发送 我/颤振(1615):形式来听单接触 我/颤振(1615):保存 我/颤动(1615):fi 我/颤动(1615):fi2 我/颤动(1615):对象 E/flutter(1615):[错误:flutter/lib/ui/ui_dart_state.cc(157)]未处理的异常:FormatException:无效的信封 E/flutter (1615): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:571:7) E/flutter(1615):#1 MethodChannel._invokeMethod(包:flutter/src/services/platform_channel.dart:156:18) E/颤动(1615): E/flutter(1615):#2 MethodChannel.invokeMethod(包:flutter/src/services/platform_channel.dart:329:12) E/flutter (1615):#3 ContactsService.addContact (package:contacts_service/contacts_service.dart:83:16) E/颤振(1615):#4 _FormState.saveData(包:camera_app/screens/form.dart:249:23) E/flutter(1615):#5 _InkResponseState._handleTap(包:flutter/src/material/ink_well.dart:779:19) E/颤振(1615):#6 _InkResponseState.build。 (包:flutter/src/material/ink_well.dart:862:36) E/flutter(1615):#7 GestureRecognizer.invokeCallback(包:flutter/src/gestures/recognizer.dart:182:24) E/flutter(1615):#8 TapGestureRecognizer.handleTapUp(包:flutter/src/gestures/tap.dart:504:11) E/flutter(1615):#9 BaseTapGestureRecognizer._checkUp(包:flutter/src/gestures/tap.dart:282:5) E/flutter (1615): #10 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:217:7) E/flutter(1615):#11 PrimaryPointerGestureRecognizer.handleEvent(包:flutter/src/gestures/recognizer.dart:475:9) E/flutter(1615):#12 PointerRouter._dispatch(包:flutter/src/gestures/pointer_router.dart:76:12) E/颤振(1615):#13 PointerRouter._dispatchEventToRoutes。 (包:flutter/src/gestures/pointer_router.dart:122:9) E/flutter (1615): #14 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8) E/flutter(1615):#15 PointerRouter._dispatchEventToRoutes(包:flutter/src/gestures/pointer_router.dart:120:18) E/flutter (1615): #16 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:106:7) E/flutter(1615):#17 GestureBinding.handleEvent(包:flutter/src/gestures/binding.dart:218:19) E/flutter(1615):#18 GestureBinding.dispatchEvent(包:flutter/src/gestures/binding.dart:198:22) E/flutter(1615):#19 GestureBinding._handlePointerEvent(包:flutter/src/gestures/binding.dart:156:7) E/flutter(1615):#20 GestureBinding._flushPointerEventQueue(包:flutter/src/gestures/binding.dart:102:7) E/flutter (1615): #21 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
【问题讨论】:
【参考方案1】:实际上我错过了权限部分。哦,我是 Flutter 的新手。
这最终对我有用,可以将联系人保存在 MAin Contacts 或电话目录中。
所以让我们使用contacts_service 0.4.6。 首先,添加依赖为:
dependencies:
contacts_service: ^0.4.6
权限:
对于安卓 将以下权限添加到您的 androidManifest.xml:
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
对于 ios 在 Info.plist 文件中设置 NSContactsUsageDescription
<key>NSContactsUsageDescription</key>
<string>This app requires contacts access to function properly.</string>
导入库:
import 'package:contacts_service/contacts_service.dart';
基本上,
final myController1 = TextEditingController();
final myController2 = TextEditingController();
...
这些是用于存储用户在 Textfield 或 Textform 中输入的值的变量。该值可以通过myController1.text
查询
我们还可以将 Contact 类对象存储为:
newContact.givenName = "Some name"; newContact.emails = [ Item(label: "email", value: "abc@gmail.com") ]; newContact.company = myController2.text; newContact.phones = [ Item(label: "mobile", value: "123456789") ];
仅保存联系人的代码:
Future<void> saveContactInPhone() async
try
print("saving Conatct");
PermissionStatus permission = await Permission.contacts.status;
if (permission != PermissionStatus.granted)
await Permission.contacts.request();
PermissionStatus permission = await Permission.contacts.status;
if (permission == PermissionStatus.granted)
Contact newContact = new Contact();
newContact.givenName = myController1.text;
newContact.emails = [
Item(label: "email", value: myController3.text)
];
newContact.company = myController2.text;
newContact.phones = [
Item(label: "mobile", value: myController4.text)
];
newContact.postalAddresses = [
PostalAddress(region: myController6.text)
];
await ContactsService.addContact(newContact);
else
//_handleInvalidPermissions(context);
else
Contact newContact = new Contact();
newContact.givenName = myController1.text;
newContact.emails = [
Item(label: "email", value: myController3.text)
];
newContact.company = myController2.text;
newContact.phones = [
Item(label: "mobile", value: myController4.text)
];
newContact.postalAddresses = [
PostalAddress(region: myController6.text)
];
await ContactsService.addContact(newContact);
print("object");
catch (e)
print(e);
同样,我发现在实际电话目录中反映更改也很困难。所以我想出了这个解决方案:
Future<void> saveContactInPhone() async
try
print("saving Conatct");
PermissionStatus permission = await Permission.contacts.status;
if (permission != PermissionStatus.granted)
await Permission.contacts.request();
PermissionStatus permission = await Permission.contacts.status;
if (permission == PermissionStatus.granted)
if (widget.checkPrev == 'for_edit')
// Contact updatedContact = new Contact();
Iterable<Contact> updatedContact =
await ContactsService.getContacts(query: myController1.text);
Contact updatedContact1 = new Contact();
updatedContact1 = updatedContact.first;
await ContactsService.deleteContact(updatedContact1);
Contact newContact = new Contact();
newContact.givenName = myController1.text;
newContact.emails = [
Item(label: "email", value: myController3.text)
];
newContact.company = myController2.text;
newContact.phones = [
Item(label: "mobile", value: myController4.text)
];
newContact.postalAddresses = [
PostalAddress(region: myController6.text)
];
await ContactsService.addContact(newContact);
else if (widget.checkPrev == 'from_btn')
Contact newContact = new Contact();
newContact.givenName = myController1.text;
newContact.emails = [
Item(label: "email", value: myController3.text)
];
newContact.company = myController2.text;
newContact.phones = [
Item(label: "mobile", value: myController4.text)
];
newContact.postalAddresses = [
PostalAddress(region: myController6.text)
];
await ContactsService.addContact(newContact);
else
if (widget.checkPrev == 'for_edit')
// Contact updatedContact = new Contact();
Iterable<Contact> updatedContact =
await ContactsService.getContacts(query: myController1.text);
await ContactsService.deleteContact(updatedContact.first);
// Contact updatedContact1 = new Contact();
// updatedContact1= updatedContact.first;
Contact newContact = new Contact();
newContact.givenName = myController1.text;
newContact.emails = [Item(label: "email", value: myController3.text)];
newContact.company = myController2.text;
newContact.phones = [
Item(label: "mobile", value: myController4.text)
];
newContact.postalAddresses = [
PostalAddress(region: myController6.text)
];
await ContactsService.addContact(newContact);
else if (widget.checkPrev == 'from_btn')
Contact newContact = new Contact();
newContact.givenName = myController1.text;
newContact.emails = [Item(label: "email", value: myController3.text)];
newContact.company = myController2.text;
newContact.phones = [
Item(label: "mobile", value: myController4.text)
];
newContact.postalAddresses = [
PostalAddress(region: myController6.text)
];
await ContactsService.addContact(newContact);
catch (e)
print(e);
这将保存联系人并在当前应用程序中进行更改时编辑联系人。
【讨论】:
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