#1 A Flutter plugin for iOS and Android for picking images from the image library

image picker plugin for flutter

a flutter plugin for ios and android for picking images from the image library.

ios

add the following keys to your info.plist:

<key>nsphotolibraryusagedescription</key>
<string>使用图片</string>
<key>nscamerausagedescription</key>
<string>照相</string>
<key>nsmicrophoneusagedescription</key>
<string>录音</string>

android

add the following permission to your manifest:

<uses-permission android:name="android.permission.read_external_storage" />
<uses-permission android:name="android.permission.write_external_storage" />
<uses-permission android:name="android.permission.camera" />

api

 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:image_picker_flutter/src/model/asset_data.dart';
 import 'package:image_picker_flutter/src/page/mul_image_picker_page.dart';
 import 'package:image_picker_flutter/src/page/single_image_picker_page.dart';
 import 'package:image_picker_flutter/src/utils.dart';
 
 typedef mulcallback = void function(list<assetdata>);
 
 typedef singlecallback = void function(assetdata);
 
 typedef callback = void function(assetdata);
 
 class imagepicker {
   imagepicker._();
 
   static debug(bool isdebug) {
     utils.isdebug = isdebug;
   }
 
   ///单选图片
   static void singlepicker(
     buildcontext context, {
     imagepickertype type = imagepickertype.imageandvideo,
     language language,
     imageprovider placeholder,
     widget title,
     widget back,
     decoration decoration,
     color appbarcolor = colors.blue,
     singlecallback singlecallback,
   }) {
     navigator.of(context).push(
       materialpageroute(
         builder: (context) => singleimagepickerpage(
               type: type,
               language: language ?? language(),
               placeholder: placeholder,
               decoration: decoration,
               appbarcolor: appbarcolor ?? colors.blue,
               title: title,
               back: back,
             ),
       ),
     )..then((data) {
         if (data != null && singlecallback != null) {
           singlecallback(data);
         }
       });
   }
 
   ///多选图片
   static void mulpicker(
     buildcontext context, {
     list<assetdata> data,
     imagepickertype type = imagepickertype.imageandvideo,
     int limit = 9,
     language language,
     imageprovider placeholder,
     widget title,
     widget back,
     widget menu,
     decoration decoration,
     color appbarcolor = colors.blue,
     mulcallback mulcallback,
   }) {
     navigator.of(context).push(
       materialpageroute(
         builder: (context) => mulimagepickerpage(
               selecteddata: data,
               type: type,
               limit: limit,
               appbarcolor: appbarcolor ?? colors.blue,
               language: language ?? language(),
               placeholder: placeholder,
               decoration: decoration,
               title: title,
               menu: menu,
               back: back,
             ),
       ),
     )..then((data) {
         if (data != null && mulcallback != null) {
           mulcallback(data);
         }
       });
   }
 
   ///拍照返回图片路径
   static void takepicture(callback callback) {
     utils.takepicture().then((a) {
       callback(a);
     });
   }
 
   ///录像返回图片路径
   static void takevideo(callback callback) {
     utils.takevideo().then((a) {
       callback(a);
     });
   }
 }
 
 enum imagepickertype {
   onlyimage,
   onlyvideo,
   imageandvideo,
 }
 
 ///文字基类
 class language {
   string get title => "gallery";
 
   string get showtoast => "only ### images can be selected";
 }

example about picking images app

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:image_picker/imagepicker.dart';
import 'package:image_picker/image/assetdataimage.dart';
import 'package:image_picker/model/assetdata.dart';
import 'package:image_picker/utils/utils.dart';
import 'package:permission_handler/permission_handler.dart';

void main() => runapp(materialapp(home: myapp()));

class myapp extends statefulwidget {
  @override
  _myappstate createstate() => _myappstate();
}

class _myappstate extends state<myapp> {
  list<assetdata> _data = [];

  @override
  void initstate() {
    if (platform.isandroid) {
      permissionhandler().requestpermissions([permissiongroup.storage]);
    }
    if (platform.isios) {
      permissionhandler().requestpermissions([permissiongroup.photos]);
    }
    super.initstate();
  }

  @override
  widget build(buildcontext context) {
    return scaffold(
      appbar: appbar(
        backgroundcolor: colors.red,
        title: center(
          child: text("demo"),
        ),
      ),
      body: gridview.builder(
        padding: edgeinsets.all(8),
        griddelegate: slivergriddelegatewithfixedcrossaxiscount(
          crossaxiscount: 3,
          mainaxisspacing: 8,
          crossaxisspacing: 8,
        ),
        itembuilder: (context, index) {
          return stack(
            alignment: alignmentdirectional.center,
            children: <widget>[
              image(
                image: assetdataimage(_data[index]),
                fit: boxfit.cover,
                width: double.infinity,
                height: double.infinity,
              ),
              iconvideo(_data[index]),
            ],
          );
        },
        itemcount: _data.length,
      ),
      bottomnavigationbar: container(
        color: colors.grey,
        height: 48 + mediaquery.of(context).padding.bottom,
        padding: edgeinsets.only(bottom: mediaquery.of(context).padding.bottom),
        alignment: alignmentdirectional.center,
        child: row(
          mainaxisalignment: mainaxisalignment.spacearound,
          children: <widget>[
            rawmaterialbutton(
              onpressed: () {
                imagepicker.mulpicker(
                  context,
                  data: _data,
                  mulcallback: (data) {
                    setstate(() {
                      _data = data;
                    });
                  },
                );
              },
              fillcolor: colors.blue,
              child: text("mulimagepikcer"),
            ),
            rawmaterialbutton(
              onpressed: () {
                imagepicker.singlepicker(context, singlecallback: (data) {
                  setstate(() {
                    _data
                      ..removewhere((a) => a == data)
                      ..add(data);
                  });
                });
              },
              fillcolor: colors.blue,
              child: text("singleimagepikcer"),
            ),
          ],
        ),
      ),
    );
  }

  widget iconvideo(assetdata data) {
    if (data.isimage) {
      return container(
        width: 0,
        height: 0,
      );
    }
    return icon(
      utils.video,
      color: colors.blue,
    );
  }
}