【发布时间】：2021-02-03 08:26:18
【问题描述】：
evrything 在模拟器中没问题，但在真实设备中崩溃了，我从列表图块内的底部调用这个类，这是我的错误 this is the error screenshot in real device when i call this class 如果我在调用 firebase 集合时在集合中使用变量，会有什么问题吗？
这是我的呼叫按钮：
onPressed: () {
Navigator.push(context,
MaterialPageRoute(builder: (context) => DetailPage(name)));
},
这是我的代码：
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
class DetailPage extends StatefulWidget {
final String index;
DetailPage(this.index);
@override
_DetailPageState createState() => _DetailPageState();
}
class _DetailPageState extends State<DetailPage> {
var filepath;
var response;
@override
Widget build(BuildContext context) {
return FutureBuilder(builder: (context, snapshot) {
return Scaffold(
appBar: AppBar(
backgroundColor: Color(0xff0fd1c0),
centerTitle: true,
title: Text(
'${widget.index}',
textDirection: TextDirection.rtl,
),
),
body: Container(
child: StreamBuilder(
stream: FirebaseFirestore.instance
.collection(widget.index)
.snapshots(),
builder: (BuildContext context,
AsyncSnapshot<QuerySnapshot> snapshot) {
if (snapshot.data == null)
return Center(child: CircularProgressIndicator());
else
return ListView.builder(
itemCount: snapshot.data.docs.length,
itemBuilder: (context, index1) {
DocumentSnapshot exams = snapshot.data.docs[index1];
return new Padding(
padding: new EdgeInsets.symmetric(
vertical: 8.0,
horizontal: 16.0,
),
child: new Card(
elevation: 16.0,
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(16.0),
),
child: new Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new ClipRRect(
child: new Image.network(
exams.data()['image'],
loadingBuilder:
(context, child, progress) {
return progress == null
? child
: Container(
color: Colors.black26,
child: Center(
child: SizedBox(
height: 250.0,
width: 200.0,
child: Center(
child: SizedBox(
width: 130.0,
height: 130.0,
child:
CircularProgressIndicator(
strokeWidth: 14.0,
backgroundColor:
Color(0xff0fd1c0),
),
))),
),
);
},
),
borderRadius: BorderRadius.only(
topLeft: new Radius.circular(16.0),
topRight: new Radius.circular(16.0),
),
),
new Padding(
padding: new EdgeInsets.all(16.0),
child: new Column(
mainAxisAlignment:
MainAxisAlignment.start,
crossAxisAlignment:
CrossAxisAlignment.start,
children: <Widget>[
new Row(
mainAxisAlignment:
MainAxisAlignment.end,
children: <Widget>[
new FloatingActionButton(
onPressed: () {},
heroTag: null,
child: Icon(Icons.share_outlined),
backgroundColor:
Colors.orangeAccent,
),
SizedBox(
width: 16.0,
height: 10.0,
),
new FloatingActionButton(
onPressed: () {
},
heroTag: null,
child: Icon(Icons.arrow_downward),
backgroundColor: Colors.yellow,
)
],
),
new SizedBox(height: 16.0),
new Row(
mainAxisAlignment:
MainAxisAlignment.spaceBetween,
children: <Widget>[
new Text(exams
.data()["name"]
.toString()),
new Text(
exams.data()["maj"].toString()),
new Text(exams
.data()["name"]
.toString()),
],
),
],
),
),
],
),
),
);
},
);
})));
}
);
}
}
Android/gradle/wrapper/gradle-wrapper.properties 内容：
#Fri Jun 23 08:50:38 CEST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
android/build.gradle 内容：
buildscript {
ext.kotlin_version = '1.3.50'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.5.1'
classpath 'com.google.gms:google-services:4.3.2'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
android/app/build.gradle 内容：
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}
android {
compileSdkVersion 30
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.ramiahmad.cordoba_university"
minSdkVersion 21
targetSdkVersion 30
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
multiDexEnabled true
}
signingConfigs {
release {
keyAlias keystoreProperties['keyAlias']
keyPassword keystoreProperties['keyPassword']
storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
storePassword keystoreProperties['storePassword']
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.google.firebase:firebase-analytics:17.6.0'
implementation 'com.android.support:multidex:1.0.3'
implementation 'com.google.firebase:firebase-auth:19.4.0'
}}
apply plugin: 'com.google.gms.google-services'
【问题讨论】：
标签： firebase flutter dart google-cloud-firestore