Question

 dependencies {

 implementation fileTree(include: ['*.jar'], dir: 'libs')

 implementation 'com.android.support:appcompat-v7:28.0.0-rc01'

 implementation 'com.android.support.constraint:constraint-layout:1.1.2'

 testImplementation 'junit:junit:4.12'

 androidTestImplementation 'com.android.support.test:runner:1.0.2'

 androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

 implementation 'com.android.support:recyclerview-v7:28.0.0-rc01'

implementation 'com.android.support:design:28.0.0-rc01'been 
}

对于Android studio 3.1.3，甚至对于rc02，在appcompat-v7:28.0.0-rc01中的依存关系上都有错误，对于com.android.support.constraint：constraint-layout：1.1.2和1.1.3布局也是如此。我该怎么解决？

dependency issues

build description app file for build

Answer 1

尝试使用较低版本的appcompat：

implementation 'com.android.support:appcompat-v7:27.1.1'

还记得将sdkVersion更改为27

Answer 2

我具有这些依赖关系，因此您可以根据需要使用任何依赖关系，并确保在“设置”->“等级”中关闭“脱机工作”以使其正常工作。

当我遇到这些错误时，我通过在Settings-> Gradle中禁用“脱机工作”来搜索这些错误，您可以使其同步而没有任何错误。

import 'package:flutter/material.dart';

void main() {
  runApp(App());
}

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Overflow"),
        ),
        body: Center(
          child: Container(
              width: 200.0,
              height: 250.0,
              child: Card(
                  child: Column(children: <Widget>[
                Image.asset(
                  "assets/bereket.jpg",
                  width: double.infinity,
                  fit: BoxFit.cover,
                ),
                Expanded(
                    child: Container(
                        padding: EdgeInsets.all(8.0),
                        child: (Column(
                          children: [
                            Text(
                                "በረከት ስምኦን፡ «ወይዘሮ አና ጎሜዝ፤ እርስዎ አያገባዎትም! አርፈው ይቀመጡ በልልኝ»",
                                maxLines: 2,
                                style: Theme.of(context)
                                    .primaryTextTheme
                                    .subhead
                                    .copyWith(
                                      color: Colors.black,
                                    ),
                                overflow: TextOverflow.ellipsis),
                            Expanded(
                                child: Container(
                                    decoration: BoxDecoration(
                                      border: Border.all(
                                          color: Colors.green, width: 2.0),
                                    ),
                                    child: Text(
                                      """ባለፉት ሁለት አስርት ዓመታት በኢትዮጵያ ፖለቲካ ከፍተኛ ተጽእኖ ፈጣሪ የነበሩት አቶ በረከት ስምኦን በቅርቡ ከብአዴን ማእከላዊ ኮሚቴ አባልነት መታገዳቸው ይታወሳል።

አቶ በርከት የብአዴን ውሳኔን በተመለከተ እና የወደፊት የፖለቲካ ህይወታቸው ምን ሊሆን እንደሚችል ለቢቢሲ አጋርተዋል።""",
                                      maxLines: 10,
                                      style: Theme.of(context)
                                          .primaryTextTheme
                                          .caption
                                          .copyWith(color: Colors.black),
                                      overflow: TextOverflow.ellipsis,
                                    ))),
                            Row(
                              crossAxisAlignment: CrossAxisAlignment.center,
                              children: <Widget>[
                                Container(
                                  width: 20.0,
                                  height: 20.0,
                                  child: Image.asset("assets/bbc.png"),
                                ),
                                SizedBox(width: 8.0),
                                Text('ቢቢሲ - ከሁለት ሰአት በፊት',
                                    style: Theme.of(context)
                                        .textTheme
                                        .caption
                                        .copyWith(fontSize: 10.0))
                              ],
                            )
                          ],
                        ))))
              ]))),
        ),
      ),
    );
  }
}

致谢

android 3.1.3中的依赖问题

2 个答案: