Hibok/lib/home/my_headview.dart

import 'dart:io';

import 'package:chat/generated/i18n.dart';
import 'package:chat/utils/CustomUI.dart';
import 'package:chat/utils/LoadingDialog.dart';
import 'package:chat/utils/MessageMgr.dart';
import 'package:chat/utils/screen.dart';
import 'package:extended_image/extended_image.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:image_cropper/image_cropper.dart';
import 'package:image_picker/image_picker.dart';
import '../utils/HttpUtil.dart';
import 'package:dio/dio.dart';
import "../data/UserData.dart";
import '../utils/TokenMgr.dart';

class MyHeadViewPage extends StatefulWidget {
  MyHeadViewPage({Key key}) : super(key: key);

  @override
  _MyHeadViewPageState createState() => new _MyHeadViewPageState();
}

class _MyHeadViewPageState extends State<MyHeadViewPage>
    with SingleTickerProviderStateMixin {
  AnimationController _animationController;
  Animation<double> _animation;
  Function animationListener;
  List<double> doubleTapScales = <double>[1.0, 2.0];

  @override
  void initState() {
    super.initState();
    _animationController = AnimationController(
        duration: const Duration(milliseconds: 150), vsync: this);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(child: _buildBody()),
      backgroundColor: Colors.black,
    );
  }

  Widget _buildHeadView() {
    return ExtendedImageGesturePageView(
      children: <Widget>[
        InkWell(
            onTap: () {
              Navigator.pop(context);
            },
            child: ExtendedImage.network(
              UserData().basicInfo.headimgurl,
              fit: BoxFit.contain,
              mode: ExtendedImageMode.gesture,
              initGestureConfigHandler: (state) {
                return GestureConfig(
                    inPageView: true,
                    maxScale: 5,
                    initialAlignment: InitialAlignment.topCenter,
                    animationMaxScale: 5,
                    cacheGesture: false);
              },
              onDoubleTap: (ExtendedImageGestureState state) {
                var pointerDownPosition = state.pointerDownPosition;
                double begin = state.gestureDetails.totalScale;
                double end;
                //remove old
                _animation?.removeListener(animationListener);

                //stop pre
                _animationController.stop();

                //reset to use
                _animationController.reset();

                if (begin == doubleTapScales[0]) {
                  end = doubleTapScales[1];
                } else {
                  end = doubleTapScales[0];
                }

                animationListener = () {
                  //print(_animation.value);
                  state.handleDoubleTap(
                      scale: _animation.value,
                      doubleTapPosition: pointerDownPosition);
                };
                _animation = _animationController
                    .drive(Tween<double>(begin: begin, end: end));

                _animation.addListener(animationListener);

                _animationController.forward();
              },
            ))
      ],
    );
  }

  Widget _buildBody() {
    return Stack(
      children: <Widget>[
        _buildHeadView(),
        Positioned(
          child: _buildChangeButton(),
          bottom: 40,
        )
      ],
    );
  }

  Widget _buildChangeButton() {
    return InkWell(
        onTap: _sendPicture,
        child: Container(
            alignment: Alignment.center,
            width: Screen.width,
            child: Container(
              height: 47.5,
              alignment: Alignment.center,
              width: 230,
              child: Text(
                I18n.of(context).upload_avatar,
                style: TextStyle(color: Colors.white, fontSize: 17.5),
              ),
              decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(24),
                  color: Color(0xFF181818)),
            )));
  }

  void _sendPicture() async {
    if (await CustomUI.showPhotoPermissionSetting(context)) {
      showDialog(
          context: context,
          barrierDismissible: false,
          builder: (BuildContext context) {
            return LoadingDialog(
              text: "",
            );
          });
      var tempFile = await ImagePicker.pickImage(source: ImageSource.gallery);
      Navigator.of(context).pop();
      if (tempFile != null) {
        _cropPicture(tempFile);
      }
    }
  }

  void _cropPicture(tempFile) async {
    File croppedFile = await ImageCropper.cropImage(
      sourcePath: tempFile.path,
      aspectRatio: CropAspectRatio(ratioX: 1, ratioY: 1),
    );

    if (croppedFile != null) {
      Map data = {"type": 1, "userId": UserData().basicInfo.userId};
      data['sign'] = TokenMgr().getSign(data);
      Response res = await HttpUtil()
          .uploadFile(croppedFile, data, 'upload/file/postflie', 'image');
      var resData = res.data;
      if (resData['code'] == 0) {
        UserData().basicInfo.headimgurl = resData['msg'];
        MessageMgr().emit('change_my_headview');
        if (mounted) {
          setState(() {});
        }
      }
    }
  }

  @override
  void dispose() {
    super.dispose();
  }
}