问题描述
我正在尝试构建一个购物应用程序，我想在网格视图中显示产品列表。我使用的代码 -
Expanded(
child: GridView.builder(
cacheExtent: 999999,itemCount: itemData.length,gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
childAspectRatio: 1 / 1.5,crossAxisCount: 2,crossAxisSpacing: 4.0,mainAxisSpacing: 4),itemBuilder: (BuildContext context,int index) {
return Container(
color: Colors.white,child: GestureDetector(
onTap: () {
Navigator.push(
context,MaterialPageRoute(
builder: (context) => ItemView(itemData,index)),);
},child: Column(
children: [
SizedBox(
height: 10,),Expanded(
child: CachedNetworkImage(
imageUrl: itemData[index][5],placeholder: (context,url) => Padding(
padding: const EdgeInsets.all(20.0),child: Image.asset("assets/images/background.png"),errorWidget: (context,url,error) => Icon(Icons.error),)),SizedBox(
height: 7,Text(itemData[index][0],style:
TextStyle(fontSize: 15,fontWeight: FontWeight.bold)),SizedBox(height: 3),Row(
mainAxisAlignment: MainAxisAlignment.center,children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,children: [Text("Wgt : "),Text("Crt : ")]),Column(
crossAxisAlignment: CrossAxisAlignment.start,children: [
Text(itemData[index][2] + "g"),Text(itemData[index][1]),])
],SizedBox(
height: 5,itemData[index][3] == "0"
? Text(
"Out of Stock",style: TextStyle(color: Colors.red),)
: Container(),],);
},)
每张图片大小范围为 200-300kb，itemData 长度范围为 50-100 个。
当我开始尝试滚动时，它会滞后，然后应用程序会自动关闭。
调试细节-
[ ] Reloaded 1 of 1140 libraries in 2,425ms.
[+29946 ms] W/InputEventReceiver(22092): Slow Input: took 293ms in dispatching,now at finishInputEvent (MotionEvent: event_seq=471,seq=1167481,action=ACTION_DOWN)
[+5360 ms] W/InputEventReceiver(22092): Slow Input: took 826ms in dispatching,now at finishInputEvent (MotionEvent: event_seq=589,seq=1167805,action=ACTION_DOWN)
[ ] W/InputEventReceiver(22092): Slow Input: 927ms so far,now at dispatchInputEvent (MotionEvent: event_seq=590,seq=1167827,action=ACTION_MOVE)
[ ] W/InputEventReceiver(22092): Slow Input: 918ms so far,now at dispatchInputEvent (MotionEvent: event_seq=591,seq=1167829,action=ACTION_UP)
[ +49 ms] W/InputEventReceiver(22092): Slow Input: 553ms so far,now at dispatchInputEvent (MotionEvent: event_seq=592,seq=1167832,action=ACTION_DOWN)
[ ] W/InputEventReceiver(22092): Slow Input: 462ms so far,now at dispatchInputEvent (MotionEvent: event_seq=593,seq=1167850,action=ACTION_MOVE)
[ ] W/InputEventReceiver(22092): Slow Input: 453ms so far,now at dispatchInputEvent (MotionEvent: event_seq=594,seq=1167852,action=ACTION_UP)
[+6824 ms] W/InputEventReceiver(22092): Slow Input: took 194ms in dispatching,now at finishInputEvent (MotionEvent: event_seq=659,seq=1168024,action=ACTION_DOWN)
[+2668 ms] W/InputEventReceiver(22092): Slow Input: took 322ms in dispatching,now at finishInputEvent (MotionEvent: event_seq=662,seq=1168057,action=ACTION_DOWN)
[ +973 ms] W/InputEventReceiver(22092): Slow Input: took 191ms in dispatching,now at finishInputEvent (MotionEvent: event_seq=677,seq=1168143,action=ACTION_DOWN)
[ +334 ms] W/InputEventReceiver(22092): Slow Input: took 104ms in dispatching,now at finishInputEvent (MotionEvent: event_seq=680,seq=1168180,action=ACTION_DOWN)
[+2081 ms] Service protocol connection closed.
[ ] Lost connection to device.
[ +1 ms] executing: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --list
[ +4 ms] Exit code 0 from: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --list
[ ] 4b7746b70305 tcp:39351 tcp:45893
4b7746b70305 tcp:37419 tcp:38492
4b7746b70305 tcp:33427 tcp:42728
[ +1 ms] executing: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --remove tcp:39351
[ +6 ms] executing: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --remove tcp:37419
[ +5 ms] executing: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --remove tcp:33427
[ +7 ms] DevFS: Deleting filesystem on the device (file:///data/user/0/com.vriksh.ganpatijewellers/code_cache/ganpatijewellersGZZHJA/ganpatijewellers/)
[ +252 ms] Ignored error while cleaning up DevFS: TimeoutException after 0:00:00.250000: Future not completed
[ +10 ms] executing: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --list
[ +8 ms] Exit code 0 from: /home/malay/Android/Sdk/platform-tools/adb -s 4b7746b70305 forward --list
[ +2 ms] "flutter run" took 227,027ms.
[ +256 ms] ensureAnalyticsSent: 252ms
[ +2 ms] Running shutdown hooks
[ ] Shutdown hooks complete
[ ] exiting with code 0
注意 - 对于调试，我使用物理设备 Redmi 6pro。我也在发布模式下对其进行了测试，但我面临着同样的问题。
解决方法
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