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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