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flutter_adapter

一个解决flutter应用适配不同平台的插件,让你的flutter应用在一个工程中灵活高效的适配各种平台,实现UI最大化复用,业务逻辑代码在不同平台间完全共享,支持根据屏幕方向实时选择不同的布局样式。

不同平台适配效果

使用方式

flutter_adapter插件内置了4类平台,分别是:手机(TEAdaptPlatform.phone)、手机横屏(TEAdaptPlatform.phoneLandscape)、pad横屏(TEAdaptPlatform.padLandscape)、pad竖屏(TEAdaptPlatform.padPortrait) 。如果你只适配部分平台,那么只需要对待适配的widget实现特定平台的build函数即可,其他未适配的平台默认会返回Phone的样式。
使用的时候只需要在APP的入口处采用ScreenAdaptWidget,然后设置当前APP需要适配的平台名称即可。

如果你需要扩展适配的平台,对于StatelessWidget只需要实现一个继承自FlexibleStatelessWidget的抽象类,然后实现新平台的build函数并注册该平台即可;对于StatefulWidget只需要实现一个继承自FlexibleState的抽象类,然后实现新平台的build函数并注册该平台即可。

插件使用示例:

ScreenAdaptWidget(
    platform: TEAdaptPlatform.phone.toString(),
    autoOrientation: true, // 是否根据屏幕方向自适应布局
    child: 任意widget
)),

如果你的某个StatelessWidget需要适配特定平台,只需要将该widget继承自FlexibleStatelessWidget,然后实现特定平台的build函数即可。

StatelessWidget适配示例:

class MyStatelessPage extends FlexibleStatelessWidget {

  @override
  Widget buildPhone(BuildContext context) {
    return Text('Phone',style: TextStyle(fontSize: 18.0),);
  }

  @override
  Widget buildPadPortrait(BuildContext context) {
    return Text('PadPortrait',style: TextStyle(fontSize: 22.0),);
  }

  @override
  Widget buildPadLandscape(BuildContext context) {
    return Text('PadLandscape',style: TextStyle(fontSize: 30.0),);
  }
}

StatefulWidget适配示例:

如果你的某个StatefulWidget需要适配特定平台,只需要将该StatefulWidget对应的的State继承自FlexibleState,然后实现特定平台的build函数即可,例如:

class MyStatefulPageState extends FlexibleState<MyStatefulPage> {

  @override
  Widget buildPhone(BuildContext context) {
    return Text('Phone',style: TextStyle(fontSize: 18.0),);
  }

  @override
  Widget buildPadPortrait(BuildContext context) {
    return Text('PadPortrait',style: TextStyle(fontSize: 22.0),);
  }

  @override
  Widget buildPadLandscape(BuildContext context) {
    return Text('PadLandscape',style: TextStyle(fontSize: 30.0),);
  }
}

普通Widget适配示例:

1、如果你的某个widget需要在不同平台中改变个别属性的值,那么只需要对特定的属性值进行跨平台适配即可,flutter_adapter提供了superObjectAdapter函数来解决属性值的跨平台适配难题。
2、如果你的某个函数需要在不同平台中执行不同的逻辑,那么只需要对特定的函数执行逻辑进行跨平台适配即可,flutter_adapter提供了superFunctionAdapter函数来解决不同函数调用的跨平台适配难题(例如:可以让一个按钮的点击事件在不同平台中执行不同的逻辑)。

class MyNormalPage extends StatelessWidget {
  final String textStr;

  MyNormalPage(this.textStr);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('page normal'),
      ),
      body: Column(
        children: <Widget>[
          GestureDetector(
            onTap: () {
              superFunctionAdapter(context, {
                TEAdaptPlatform.phone.toString(): () {
                  print('tab me on ${TEAdaptPlatform.phone.toString()}');
                },
                TEAdaptPlatform.padPortrait.toString(): () {
                  print('tab me on ${TEAdaptPlatform.padPortrait.toString()}');
                },
              });
            },
            child: Container(
              padding: EdgeInsets.all(10.0),
              margin: EdgeInsets.only(bottom: 30.0),
              width: double.infinity,
              height: 100.0,
              color: superObjectAdapter(context, {TEAdaptPlatform.phone.toString(): Colors.yellow, TEAdaptPlatform.padPortrait.toString(): Colors.greenAccent}),
              child: Center(
                child: Text(
                  '$textStr ${superObjectAdapter(context, {
                    TEAdaptPlatform.phone.toString(): "[Phone]",
                  TEAdaptPlatform.padPortrait.toString(): "[PadPortrait]"
                  })}',
                  style: TextStyle(
                      fontSize: superObjectAdapter(context, {TEAdaptPlatform.phone.toString(): 18.0, TEAdaptPlatform.padPortrait.toString(): 38.0}),
                      color: Colors.black),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}

扩展需要适配的平台

插件内置的3个平台在实际使用的过程中可能不够用,因此我们提供了用户自定义平台的适配解决方案。

StatelessWidget适配新平台

对于StatelessWidget只需要实现一个继承自FlexibleStatelessWidget的抽象类,然后实现新平台的build函数,之后注册该平台即可。

abstract class CustomFlexibleStatelessWidget extends FlexibleStatelessWidget {
  @protected
  Widget buildNewPlatform(BuildContext context) {
    return buildPhone(context); // by default, you can return the phone's style
  }

  @protected
  void initAdapter() {
    super.initAdapter();
    addAdapter(Constant.newPlatform, buildNewPlatform);// register new Platform
  }
}

StatelessWidget适配新平台示例:

class MyStatelessPage extends CustomFlexibleStatelessWidget {

  @override
  Widget buildPhone(BuildContext context) {
    return Text('Phone',style: TextStyle(fontSize: 18.0),);
  }

  @override
  Widget buildPadPortrait(BuildContext context) {
    return Text('PadPortrait',style: TextStyle(fontSize: 22.0),);
  }

  @override
  Widget buildNewPlatform(BuildContext context) {
    return Text('buildNewPlatform',style: TextStyle(fontSize: 30.0),);
  }
}

StatefulWidget适配新平台

对于StatefulWidget只需要实现一个继承自FlexibleState的抽象类,然后实现新平台的build函数,之后注册该平台即可。

abstract class CustomFlexibleState<T extends StatefulWidget> extends FlexibleState<T> {
  @protected
  Widget buildNewPlatform(BuildContext context) {
    return buildPhone(context); // by default, you can return the phone's style
  }

  @protected
  void initAdapter() {
    super.initAdapter();
    addAdapter(Constant.newPlatform, buildNewPlatform);// register new Platform
  }
}

StatefulWidget适配新平台示例:

class MyStatefulPageState extends CustomFlexibleState<MyStatefulPage> {

  @override
  Widget buildPhone(BuildContext context) {
    return Text('Phone',style: TextStyle(fontSize: 18.0),);
  }

  @override
  Widget buildPadPortrait(BuildContext context) {
    return Text('PadPortrait',style: TextStyle(fontSize: 22.0),);
  }

  @override
  Widget buildNewPlatform(BuildContext context) {
    return Text('NewPlatform',style: TextStyle(fontSize: 30.0),);
  }
}

License

Copyright (C) 2019 The Android Open Source Project
Copyright (C) 2019 WeslyWang

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.