Question

所以我的球图像显示在模拟器上，而不是我添加的我的magic.jpg。我的pubspec.yaml很好。我知道。有人知道怎么了吗？ my folder tree

pubspec.yaml文件：

name: magic_8_ball
description: A new Flutter application.

version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:

  uses-material-design: true

  assets:
    - assets/images/magic.jpg

我的代码：

import 'package:flutter/material.dart';
import 'dart:math';

void main() => runApp(
      MaterialApp(
        debugShowCheckedModeBanner: false,
        home: BallPage(),
      ),
    );

class BallPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.blue[900],
        title: Text('Ask Me Anything'),
      ),
      body: Stack(children: [
        Container(
          decoration: BoxDecoration(
            image: DecorationImage(
              image: AssetImage("assets/images/magic"),
              fit: BoxFit.cover,
            ),
          ),
        ),
        Ball()
      ]),
    );
  }
}

class Ball extends StatefulWidget {
  @override
  _BallState createState() => _BallState();
}

class _BallState extends State<Ball> {
  int ballNum = 1;

  @override
  Widget build(BuildContext context) {
    return Center(
        child: FlatButton(
            onPressed: () {
              setState(() {
                ballNum = Random().nextInt(5) + 1;
              });
            },
            child: Image.asset('assets/images/ball$ballNum.png')));
  }
}

错误日志：

I/flutter (22530): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/flutter (22530): The following assertion was thrown resolving an image codec:
I/flutter (22530): Unable to load asset: assets/images/magic
I/flutter (22530): 
I/flutter (22530): When the exception was thrown, this was the stack:
I/flutter (22530): #0      PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
I/flutter (22530): <asynchronous suspension>
I/flutter (22530): #1      AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:464:44)
I/flutter (22530): <asynchronous suspension>
I/flutter (22530): #2      AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:449:14)
I/flutter (22530): #3      ImageProvider.resolve.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:316:48)
I/flutter (22530): #4      ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:160:22)
I/flutter (22530): #5      ImageProvider.resolve.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:316:25)
I/flutter (22530): (elided 13 frames from package dart:async)
I/flutter (22530): 
I/flutter (22530): Image provider: AssetImage(bundle: null, name: "assets/images/magic")
I/flutter (22530): Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#77a87(), name: "assets/images/magic",
I/flutter (22530):   scale: 1.0)
I/flutter (22530): ════════════════════════════════════════════════════════════════════════════════════════════════════

谢谢一群！！ what my app looks like (as you can see, any ball image can show up, but not my background image, which I called magic.jpg

Answer 1

您没有将图像rootView = inflater.inflate(R.layout.book_chapter_custom_cab_view, container, false); webView = rootView.findViewById(R.id.webview); webView.getSettings().setJavaScriptEnabled(true); webview.evaluateJavascript("(function(){return window.getSelection().toString()})()", new ValueCallback<String>() { @Override public void onReceiveValue(String value) { Log.v(TAG, "SELECTION:" + value); } });的扩展名放在小部件String htmlBegin = "<!DOCTYPE html><head><meta charset=\"utf-8\" /> " + " <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\"> " + " <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"></head><body>"; String htmlEnd = "<br/><br/><br/></body></html>"; webView.loadDataWithBaseURL("", htmlBegin + content + htmlEnd, "text/html", "UTF-8", "");中。

简单地说，像这样magic，它应该可以正常工作。

无法加载资产（在Android Studio中波动）

1 个答案: