Вызов функции в flutter

---

import 'dart:convert';
import 'dart:io';
import 'package:Shopper/_commonWidget/_progressLoader.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter_datetime_picker/flutter_datetime_picker.dart';
import 'package:image_cropper/image_cropper.dart';
import 'package:image_picker/image_picker.dart';
import 'package:google_map_location_picker/google_map_location_picker.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:Shopper/_commonWidget/_categories.dart';
import 'package:Shopper/_contstants/GlobalConst.dart';
import 'package:http/http.dart' as http;
import 'package:toast/toast.dart';


class AddPost extends StatefulWidget {
  @override
  _AddPostState createState() => _AddPostState();
}

class _AddPostState extends State<AddPost> {

  final _descriptionNode = FocusNode();
  final _couponNode = FocusNode();
  final _discountNode = FocusNode();
  final _videoNode = FocusNode();
  final GlobalKey<FormState> _formKey = new GlobalKey<FormState>();

  // -- Vars
  List<File> _pData = List<File>();
  List _cities = List();
  List<String> _encData = List<String>();
  var discount_value = "new";
  var _discountRatio = "0";
  var _expireDateTime = "Expire DateTime";
  List<String> _selectedLocation = new List<String>();
  var _mDescription = "";
  var _selectedCity = "Faisalabad";
  var _couponCode="";
  var _videoUrl="";
  bool isLoading = true;
  var _selectedCategory = GlobalConst.AD_CATEGORIES[0];
  ProgressLoader _pl;


  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    _pl = new ProgressLoader(context);
  }


  /*** -- init -- ***/
  // -- BUild Call
  _AddPostState() {
    this.fetchCities();
  }


  Future fetchCities() async{
    try {
      await http.post(GlobalConst.SHOPPER_API, body: {
        "country": "Pakistan",
        "action": "get_city",
      }).then((res) {
        if (res.statusCode == 200) {
          var resBody = jsonDecode(res.body);
          setState(() {
            _selectedCity = resBody[0];
            _cities = resBody;
            isLoading = false;
          });
        }
      }).catchError((err) {
        print(err);
      });
    } catch(e){
      print(e);
    }
  }



  //-- __DoPostTo API
  Future _dopostToAPI() async{
    _pl.showAlertDialog(context);
    /*
    * Validations
    * */
    if(_pData.length == 0){ Navigator.pop(context,_pl); Toast.show("ERROR: Images Not Selected", context,gravity: Toast.CENTER); return;}
    //if(_selectedLocation.length < 1){ Navigator.pop(context,_pl); Toast.show("ERROR: Location Not Selected", context,gravity: Toast.CENTER); return;}
    if(_discountRatio == "0" && discount_value == "flat" || discount_value == "upto"){ Navigator.pop(context,_pl); Toast.show("ERROR: Discount Values Not Correct", context,gravity: Toast.CENTER); return;}
    if(_mDescription.length < 5){ Navigator.pop(context,_pl); Toast.show("ERROR: Description is Missing", context,gravity: Toast.CENTER); return;}
    if(_expireDateTime == "Expire DateTime"){ Navigator.pop(context,_pl); Toast.show("ERROR: Expire Date/Time Not Selected", context,gravity: Toast.CENTER); return;}

    SharedPreferences _session = await SharedPreferences.getInstance();
    String _uid = await _session.getString("ID");

    _encData.clear();
    for(var c = 0; c < _pData.length; c++){
      _encData.add(base64Encode(_pData[c].readAsBytesSync()));
    }

    http.post(GlobalConst.SHOPPER_API, body: {
      "adimg": jsonEncode(_encData),
      "ad_location": (_selectedLocation.length > 0) ? _selectedLocation.join("|") : "0",
      "ad_discount": (discount_value.toString() == "deal" || discount_value.toString() == "new") ? discount_value.toString() : discount_value.toString()+_discountRatio.toString(),
      "ad_area": _selectedCity.toString(),
      "seller_id": _uid,
      "ad_desc": _mDescription,
      "ad_video": _videoUrl.toString(),
      "ad_category": _selectedCategory.toString(),
      "ad_coupon": _couponCode.toString(),
      "ad_callaction": (_callAction.length > 0) ? _callAction.join("|") : "0",
      "ad_expire": _expireDateTime.toString(),
      "ad_imgcount": _encData.length.toString(),
      "action": "post_ad",
    }).then((res) {
      Navigator.pop(context,_pl);
      if(res.body == "success"){
        Toast.show("Ad Successfully Posted, Under Review", context);
        Navigator.pop(context,this);
      }else{
        Toast.show("[SERVER_ERROR] "+ res.body, context);
      }

    }).catchError((err) {
      print("ERROR: "+err);
      Navigator.pop(context,_pl);
    });
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Container(
          child: SingleChildScrollView(
            child: Form(
              key: _formKey,
              child: Column(
                children: <Widget>[
                  _addPostBar(),
                  _adPostMediaPicker(),
                  _ExpireNCategory(),
                  _discountPicker(),
//                _LocationNCity(),
                  _contactNumber(),
                  _couponandvideo(),
                  _postDescription(),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  /**
   * TOP NAV CONTROLS
   * */

  // -- addpostBar
  Widget _addPostBar() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.only(
          left: 10,
          right: 10
      ),
      height: 60,
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[
          Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                "Post an ad",
                style: TextStyle(
                  fontSize: 20,
                ),
              )
            ],
          ),
          Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              FlatButton(
                color: Colors.blue,
                onPressed: () {
                  _dopostToAPI();
                },
                child: Text(
                  "Done",
                  style: TextStyle(
                    color: Colors.white,
                  ),
                ),
              )
            ],
          )
        ],
      ),
    );
  }



  /*
  * _contactNumber WIdget
  * */
  Widget _contactNumber(){
    return Container(
      margin: EdgeInsets.fromLTRB(10,5,10,5),
      child: new Theme(
          data: new ThemeData(
            primaryColor: Color(0xff888888),
          ),
          child: Row(
            children: <Widget>[
              _selectedLocationItemsButton(),
              Expanded(child: _LocationBtn()),
              SizedBox(width:10),
              SizedBox(width: 135,child: _CallBtn()),
              _selectedCallItemsButton(),
            ],
          )
      ),
    );
  }

  Widget _couponandvideo(){
    return Container(
      margin: EdgeInsets.fromLTRB(10,5,10,5),
      child: new Theme(
          data: new ThemeData(
            primaryColor: Color(0xff888888),
          ),
          child: Row(
            children: <Widget>[
              SizedBox(
                width: 150,
                height: 40,
                child: TextFormField(
                  onFieldSubmitted: (v){
                    FocusScope.of(context).requestFocus(_videoNode);
                  },
                  focusNode: _couponNode,
                  onChanged: (value) {
                    setState(() {
                      _couponCode = value;
                    });
                  },
                  keyboardType: TextInputType.number,
                  decoration: InputDecoration(
                    contentPadding: EdgeInsets.all(5),
                    border: new OutlineInputBorder(
                        borderSide: new BorderSide(
                            color: Color.fromARGB(1, 55, 55, 55)
                        )
                    ),
                    hintText: "Code",
                    labelText: "Coupon",
                    labelStyle: TextStyle(
                        fontSize: 14.0
                    ),
                    suffixIcon: Icon(Icons.loyalty),
                  ),
                ),
              ),
              SizedBox(width:10),
              Expanded(
                child: new Theme(
                  data: new ThemeData(
                    primaryColor: Color(0xff888888),
                  ),
                  child: SizedBox(
                    height: 40,
                    child: TextFormField(
                      onFieldSubmitted: (v){
                        FocusScope.of(context).requestFocus(_descriptionNode);
                      },
                      focusNode: _videoNode,
                      onChanged: (value) {
                        setState(() {
                          _videoUrl = value;
                        });
                      },
                      keyboardType: TextInputType.url,
                      decoration: InputDecoration(
                        contentPadding: EdgeInsets.all(5),
                        border: new OutlineInputBorder(
                            borderSide: new BorderSide(
                                color: Color.fromARGB(1, 55, 55, 55)
                            )
                        ),
                        hintText: "Youtube Video Url",
                        labelText: "Video Link",
                        labelStyle: TextStyle(
                            fontSize: 14.0
                        ),
                        suffixIcon: Icon(Icons.link),
                      ),
                    ),
                  ),
                ),
              )
            ],
          )
      ),
    );
  }

  /*
  * call popup menu button
  * */
  Widget _selectedCallItemsButton(){
    return PopupMenuButton<String>(
        child: Container(
          height: 36,
          width: 24,
          padding: EdgeInsets.only(top: 2),
          color: Colors.amber,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.start,
            children: <Widget>[
              Icon(Icons.list,size: 24,color: Colors.white,),
            ],
          ),
        ),
        onSelected: (value) {
          setState(() {
            _callAction.remove(value);
          });
          Toast.show("Number removed from list", context,
              gravity: Toast.CENTER);
        },
        itemBuilder: (context) => _callAction
            .map((item) => PopupMenuItem<String>(
          value: item,
          child: Text(
              item
          ),
        )).toList()
    );
  }


  //&&& --- location
  getCallNo(){
    return showDialog(
        context: context,
        barrierDismissible: false,
        builder: (BuildContext context) {
          return CustomDialog();
        });
  }

  Widget _CallBtn(){
    return RaisedButton(
      padding: EdgeInsets.symmetric(horizontal: 0.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Icon(Icons.call,color: Colors.black38,),
          Text("Add Numbers"),
        ],
      ),
      color: Colors.white,
      onPressed: (){
        if(_callAction.length < 5) {
          getCallNo();
        }else{
          Toast.show("[LIMIT_ALERT]: only (5) numbers allowed", context, gravity: Toast.CENTER);
        }
      },
    );
  }

  /*
  * Post Description
  * */
  Widget _postDescription(){
    return Container(
      margin: EdgeInsets.fromLTRB(10,5,10,5),
      child: new Theme(
        data: new ThemeData(
          primaryColor: Color(0xff888888),
        ),
        child: TextFormField(
          focusNode: _descriptionNode,
          onChanged: (value) {
            setState(() {
              _mDescription = value;
            });
          },
          maxLines: 5,
          maxLength: 170,
          keyboardType: TextInputType.multiline,
          decoration: InputDecoration(
              contentPadding: EdgeInsets.all(10),
              border: new OutlineInputBorder(
                  borderSide: new BorderSide(
                      color: Color.fromARGB(1, 55, 55, 55)
                  )
              ),
              hintText: "Tell people about your Ad...",
              labelText: "Description",
              labelStyle: TextStyle(
                  fontSize: 14.0
              ),
              alignLabelWithHint: true
          ),
        ),
      ),
    );;
  }


  /*
  * Discount picker ROw
  * */
  Widget _discountPicker() {
    return Container(
      margin: EdgeInsets.fromLTRB(10,5,10,5),
      child: Row(
        children: <Widget>[
          Container(
            width: MediaQuery.of(context).size.width/4,
            child: new Theme(
              data: new ThemeData(
                primaryColor: Color(0xff888888),
              ),
              child: SizedBox(
                height: 48,
                child: TextFormField(
                  focusNode: _discountNode,
                  onChanged: (value) {
                    if(int.parse(value) < 5 && int.parse(value) > 95){
                      Toast.show("ERROR: Choose in between 5 to 95", context,gravity: Toast.CENTER);
                    } else {
                      _discountRatio = value;
                    }
                  },
                  buildCounter: (BuildContext context, { int currentLength, int maxLength, bool isFocused }) => null,
                  maxLength: 2,
                  keyboardType: TextInputType.number,
                  onFieldSubmitted: (v){
                    FocusScope.of(context).requestFocus(_couponNode);
                  },
                  decoration: InputDecoration(
                    contentPadding: EdgeInsets.all(5),
                    border: new OutlineInputBorder(
                        borderSide: new BorderSide(
                            color: Color.fromARGB(1, 55, 55, 55)
                        )
                    ),
                    hintText: "Ratio",
                    labelText: "Discount",
                    labelStyle: TextStyle(
                        fontSize: 14.0
                    ),
                    suffixText: "%",
                  ),
                ),
              ),
            ),
          ),
          SizedBox(width: 10),
          SizedBox(
            width:30,
            child: Radio(
              materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
              activeColor: Colors.indigoAccent,
              value: 'flat',
              groupValue: discount_value,
              onChanged: _setDiscountValue,
            ),
          ),Text('Flat'),
          SizedBox(
            width: 30,
            child: Radio(
                materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
                activeColor: Colors.indigoAccent,
                value: 'upto',
                groupValue: discount_value,
                onChanged: _setDiscountValue
            ),
          ),Text("Upto"),
          SizedBox(
            width:30,
            child: Radio(
                materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
                activeColor: Colors.indigoAccent,
                value: 'deal',
                groupValue: discount_value,
                onChanged: _setDiscountValue
            ),
          ),Text("Deal"),
          SizedBox(
            width:30,
            child: Radio(
                materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
                activeColor: Colors.indigoAccent,
                value: 'new',
                groupValue: discount_value,
                onChanged: _setDiscountValue
            ),
          ), Text("New"),

        ],
      ),
    );
  }
  // -- SetDiscount Value
  _setDiscountValue(v){
    setState(() {
      discount_value = v;
    });
  }


  /*
  *
  * Picked Images List
  * */
  Widget _PickedImagesList(){
    return (_pData.length > 0) ? Container(
      height: 70,
      child: ListView(
        scrollDirection: Axis.horizontal,
        children: _pData.map((data) {
          return Container(
            margin: EdgeInsets.only(left:5,right:5),
            child: Stack(
              children: <Widget>[
                Positioned(
                  child: Image.file(data),
                ),
                Positioned(
                  right: 3,
                  top: 3,
                  child: GestureDetector(
                    child: Icon(
                        Icons.remove_circle,
                        color: Colors.red
                    ),
                    onTap: (){
                      var index = _pData.indexOf(data);
                      setState(() {
                        _pData.removeAt(index);
                      });
                    },
                  ),
                ),
              ],
            ),
          );
        }).toList(),
      ),
    ) : Center();
  }


  /*
  *
  * AD Post Media
  * */
  Widget _adPostMediaPicker() {
    return Container(
      margin: EdgeInsets.fromLTRB(10,5,10,5),
      child: Row(
          children: <Widget>[
            (_pData.length > 0) ? Expanded(
              child: _PickedImagesList(),
            ) : Center(),
            RaisedButton(
              padding: EdgeInsets.only(top: 3, bottom: 3),
              splashColor: Colors.transparent,
              highlightColor: Colors.transparent,
              color: Colors.white,
              onPressed: () => { _dialogCall(context, false)},
              child: Column( // Replace with a Row for horizontal icon + text
                children: <Widget>[
                  Icon(
                    Icons.image,
                    color: Colors.black38,
                    size: 24,
                  ),
                  Text(
                    "Add Photo",
                    textAlign: TextAlign.center,
                  )
                ],
              ),
            ),
            SizedBox(width: 10,),
          ]
      ),
    );
  }


//------ DIALLOGUE
  _openGallery() async {
    try {
      var _pic = await ImagePicker.pickImage(
        source: ImageSource.gallery,
      );

      _pic =
      await ImageCropper.cropImage(sourcePath: _pic.path, aspectRatioPresets: [
        CropAspectRatioPreset.square,
      ]);
      //-- set new image
      setState(() {
        //_pickedImage.add(_pic);
        _pData.add(_pic);
      });
    } catch (e) {
      print("no img");
    }

    //-- navigate to back activity
    Navigator.of(context, rootNavigator: true).pop();
  }

// -- Open Camera
  _openCamera() async {
    try {
      var _pic = await ImagePicker.pickImage(
        source: ImageSource.camera,
      );
      _pic =
      await ImageCropper.cropImage(sourcePath: _pic.path, aspectRatioPresets: [
        CropAspectRatioPreset.square,
      ]);
      //-- set new image
      setState(() {
        _pData.add(_pic);
      });
    } catch (e) {
      print("no img");
    }
    //-- navigate to back activity
    Navigator.of(context, rootNavigator: true).pop();
  }


  // -- show dialogue
  Future<void> _dialogCall(BuildContext context, bool dismiss) {
    return showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
              content: Container(
                height: 100,
                child: Column(
                  children: <Widget>[
                    Text("Choose From...", style: TextStyle(fontSize: 18,),),
                    SizedBox(height: 10,),
                    GestureDetector(
                        child: Row(
                          children: <Widget>[
                            Icon(Icons.camera,color: Colors.black38,),
                            SizedBox(width: 5),
                            Text('Camera'),
                          ],
                        ),
                        onTap: () async {
                          _openCamera();
                        }
                    ),
                    SizedBox(height: 20,),
                    GestureDetector(
                        child: Row(
                          children: <Widget>[
                            Icon(Icons.collections,color: Colors.black38,),
                            SizedBox(width: 5),
                            Text('Gallery'),
                          ],
                        ),
                        onTap: () async {
                          _openGallery();
                        }),
                  ],
                ),
              )
          );
        }
    );
  }

  /*
  * location popup menu button
  * */
  Widget _selectedLocationItemsButton(){
    return PopupMenuButton<String>(
        child: Container(
          height: 36,
          width: 24,
          padding: EdgeInsets.only(top: 2),
          color: Colors.amber,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.start,
            children: <Widget>[
              Icon(Icons.list,size: 24,color: Colors.white,),
            ],
          ),
        ),
        onSelected: (value) {
          setState(() {
            _selectedLocation.remove(value);
          });
          Toast.show("Location removed from list", context,
              gravity: Toast.CENTER);
        },
        itemBuilder: (context) => _selectedLocation
            .map((item) => PopupMenuItem<String>(
          value: item,
          child: Text(
            loctocitystr(item.toString()),
          ),
        )).toList()
    );
  }
  // -- location name by address
  String loctocitystr(loc){
    var chunks = loc.split(",");
    return chunks[chunks.length-3];
  }




  //&&& --- location
  Future getLocation() async {
    if(_selectedLocation.length < 5) {


      LocationResult result = await showLocationPicker(
          context, "AIzaSyCkIVKoOIsfuhT6d4wUchL5lNJ4Nc0vAv0");

      try {
        if (mounted) {
          setState(() {
            _selectedLocation.add(result.address);
          });
          Toast.show("Location Added To List (Tap icon to see)", context,
              gravity: Toast.CENTER);
        }
      }catch(e){
        print(e);
      }


    }
    else{
      Toast.show("[LIMIT_ALERT]: only (5) locations allowed", context,
          gravity: Toast.CENTER);
    }
  }

  Widget _LocationBtn(){
    return RaisedButton(
      padding: EdgeInsets.symmetric(horizontal: 0.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Icon(Icons.map,color: Colors.black38,),
          Text("Pick Location"),
        ],
      ),
      color: Colors.white,
      onPressed: (){
        getLocation();
      },
    );
  }
  //&&& --- cities
  Widget _citiesDrop(){
    return (!isLoading) ? Container(
      width: 120.0,
      height: 40,
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(5.0),
        border: Border.all(
            color: Colors.black38, style: BorderStyle.solid, width: 0.60),
      ),
      child: DropdownButtonHideUnderline(
        child: ButtonTheme(
          alignedDropdown: true,
          child: new DropdownButton(
            isExpanded: true,
            items: _cities.map((city_val) {
              return new DropdownMenuItem(
                value: city_val,
                child: new Text(
                    city_val,
                    style: new TextStyle(fontSize: 14.0)
                ),
              );
            }).toList(),
            value: _selectedCity,
            onChanged: (city_val_changed){
              setState(() {
                _selectedCity = city_val_changed;
              });
            },
          ),
        ),
      ),
    ) : Text("Select City");
  }

  //location





  // Expite and Category
  Widget _ExpireNCategory(){
    return Container(
      margin: EdgeInsets.fromLTRB(10,5,10,5),
      child: Row(
        children: <Widget>[
          Expanded(child: _Categories()),
          SizedBox(width: 10,),
          Expanded(child: _ExpiryDate()),
        ],
      ),
    );
  }
  //--- _Categories
  Widget _Categories(){
    return Container(
      height: 40,
      child: CategoriesDropdown(
        SelectedValue: _selectedCategory,
        onSelectParam: (val){
          setState(() {
            _selectedCategory = val;
          });
        },
      ),
    );
  }
  //--- Expiry
  Widget _ExpiryDate(){
    return RaisedButton(
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Icon(Icons.timer,color: Colors.black38,),
          Container(
            width: MediaQuery.of(context).size.width/3.5,
            child: Column(
              children: <Widget>[
                Text(_expireDateTime),
              ],
            ),
          ),
        ],
      ),
      color: Colors.white,
      onPressed: (){
        DatePicker.showDateTimePicker(
            context,
            showTitleActions: true,
            onConfirm: (date) {
              setState(() {
                _expireDateTime = date.toString().replaceFirst(new RegExp(r'(\.000|\.00)$'),"");
              });
            });
      },
    );
  }
}


class CustomDialog extends StatefulWidget {
  @override
  _CustomDialogState createState() => _CustomDialogState();
}

class _CustomDialogState extends State<CustomDialog> {
  List<Widget> widgetList = [];
  int removeIndex = -1;
  String pickedData="";
  List<String> _callAction = new List<String>();

  @override
  void initState() {
    widgetList.add(textFormFiled());
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Theme(
      data: new ThemeData(
          primaryColor: Color(0xff888888)),
      child: Dialog(
        insetPadding:
        const EdgeInsets.symmetric(horizontal: 16.0, vertical: 16.0),
        child: Container(
          height: 354.0,
          width: double.maxFinite,
          color: Colors.white,
          child: Padding(
            padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 12),
            child: Column(
              mainAxisSize: MainAxisSize.max,
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                Padding(
                  padding:
                  const EdgeInsets.symmetric(vertical: 12, horizontal: 12),
                  child: Text(
                    'Add Number',
                    style: TextStyle(
                        color: Colors.black,
                        fontSize: 22.0,
                        fontWeight: FontWeight.w600),
                  ),
                ),
                Container(
                  height: widgetList.length>2?200:null,
                  child: ListView.builder(
                      shrinkWrap: true,
                      itemCount: widgetList.length,
                      itemBuilder: (context, index) {
                        removeIndex = index;
                        return widgetList[index];
                      }),
                ),
                SizedBox(
                  height: 8,
                ),
                Row(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: <Widget>[
                    InkWell(
                      onTap: () {
                        if (widgetList.length > 1) {
                          widgetList.removeAt(removeIndex);
                          setState(() {});
                        }
                      },
                      child: Icon(
                        Icons.remove,
                        color: Colors.red,
                      ),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    InkWell(
                      child: Icon(
                        Icons.add,
                        color: Colors.blue,
                      ),
                      onTap: () {
                        widgetList.add(textFormFiled());
                        setState(() {});
                      },
                    ),
                  ],
                ),
                Spacer(),
                Row(
                  crossAxisAlignment: CrossAxisAlignment.end,
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: <Widget>[
                    new FlatButton(
                      child: Text('Add',style:TextStyle(color: Colors.white)),
                      color: Colors.amberAccent,
                      onPressed: () {
                        if(pickedData!=null&&pickedData.length > 2) {
                          setState(() {
                            _callAction.add(pickedData);
                          });
                          Toast.show(
                              "Number Added To List (Tap icon to see)", context,
                              gravity: Toast.CENTER);
                        }else{
                          Toast.show(
                              "Not a valid number to add", context,
                              gravity: Toast.CENTER);
                        }
                        Navigator.of(context).pop();
                      },
                    ),

                    SizedBox(
                      width: 15,
                    ),
                    new FlatButton(
                        child: Text('Cancle',style:TextStyle(color: Colors.white)),
                        color: Colors.amberAccent,
                        onPressed: () {
                          Navigator.of(context, rootNavigator: true).pop();
                        }
                    ),
                    SizedBox(
                      width: 15,
                    ),
                  ],
                )
              ],
            ),
          ),
        ),
      ),
    );
  }

  Widget textFormFiled() {
    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      child: TextField(
        keyboardType: TextInputType.number,
        onChanged: (v){

        },
        decoration: new InputDecoration(
          border: new OutlineInputBorder(
              borderSide: new BorderSide(
                  color: Color.fromARGB(1, 55, 55, 55)
              )
          ),
          hintText: '92xxxxxxxxxx',
          labelText: 'Mobile/Phone No.#',
          prefixIcon: Icon(Icons.call),
        ),
      ),
    );
  }
}

Что я уже пробовал:

я пытаюсь но замечаю так что пожалуйста пришлите мне решения

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