Unhandled Exception: Cannot hit test a render box with no size

user_11683255 0
Viewed 23552

so I am trying to recreate a UI template. This is the code. I'm trying to add another Horizontal GridView by calling RecentlyViewed() but upon reloading it cannot render. I don't know the way to render this. I have tried using the expanded widget and flexible but none of it works

return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        backgroundColor: Colors.blueGrey[50],
        centerTitle: true,
        title: Text(
            'Engagement Rings',
          style: TextStyle(
            fontWeight: FontWeight.bold,
          ),
        ),
      ),
      resizeToAvoidBottomPadding: false,
      body: SingleChildScrollView(
        child: Column(
            children: <Widget>[
              //Padding
              new Padding(padding: const EdgeInsets.all(8.0),),

              //Horizontal List
              picSlides(),

              //Padding
              SizedBox(height: 10.0),

              //Grid View
              Container(
                height: 100.0,
                child: Column(
                  children: <Widget>[
                    Align(
                      alignment: Alignment.topLeft,
                      child: Text(
                        'Engagement Rings',
                        textAlign: TextAlign.left,
                        style: TextStyle(
                          fontWeight: FontWeight.bold,
                          fontSize: 20.0,
                        ),
                      ),
                    ),

                    Align(
                      alignment: Alignment.centerLeft,
                      child: Text(
                        'bhjbsdbskjksbdknbsdnbbskdbbsdk',
                        textAlign: TextAlign.left,
                      ),
                    ),
                    Align(
                      alignment: Alignment.bottomLeft,
                      child: RaisedButton(
                        onPressed: (){},
                        color: Colors.white,
                        child: Text(
                          '450.00 USD',
                          style: TextStyle(
                            fontWeight: FontWeight.bold,
                            color: Colors.black,
                          ),
                        ),
                      ),
                    )
                  ],
                ),
              ),
              SizedBox(height: 10.0),
              sizeRow(),
              SizedBox(height: 10.0),
              Container(
                margin: EdgeInsets.all(5.0),
                padding: EdgeInsets.fromLTRB(5.0, 10.0, 5.0, 5.0),
                height: 150.0,
                color: Colors.grey,
                child: Column(
                  children: <Widget>[
                    Align(
                      alignment: Alignment.topLeft,
                      child: Container(
                        child: Text(
                          'Finance Calculator',
                        ),
                      ),
                    ),
                    Expanded(
                        child:Row(
                          children: <Widget>[
                            Container(
                              color: Colors.white,
                              child: Center(
                                child: Text(
                                  '0%',
                                  style:TextStyle(
                                    fontWeight: FontWeight.bold,
                                    fontSize: 100.0,
                                  ),
                                ),
                              ),
                            ),
                            Expanded(
                                child: Container(
                                 color: Colors.white,
                                  child: Center(
                                   child: Text(
                                  'From only 35.00 USD Per Month',
                                ),
                              ),
                             )
                            )
                          ],
                        ),
                    )
                  ],
                )
              ),
              SizedBox(height: 10.0),
              RecentlyViewed(),
            ]
        ),
      )
    );

This is the error shown:

E/flutter (11292): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: Cannot hit test a render box with no size.
E/flutter (11292): The hitTest() method was called on this RenderBox: RenderRepaintBoundary#68904 relayoutBoundary=up12 NEEDS-PAINT:
E/flutter (11292):   needs compositing
E/flutter (11292):   creator: RepaintBoundary ← NotificationListener<ScrollNotification> ← GlowingOverscrollIndicator ← Scrollable ← GridView ← RecentlyViewed ← Column ← _SingleChildViewport ← IgnorePointer-[GlobalKey#1d332] ← Semantics ← _PointerListener ← Listener ← ⋯
E/flutter (11292):   parentData: offset=Offset(0.0, 0.0); flex=null; fit=null (can use size)
E/flutter (11292):   constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=Infinity)
E/flutter (11292):   layer: OffsetLayer#74c19 DETACHED
E/flutter (11292):   size: MISSING
E/flutter (11292):   metrics: 0.0% useful (1 bad vs 0 good)
E/flutter (11292):   diagnosis: insufficient data to draw conclusion (less than five repaints)
E/flutter (11292): Although this node is not marked as needing layout, its size is not set.
E/flutter (11292): A RenderBox object must have an explicit size before it can be hit-tested. Make sure that the RenderBox in question sets its size during layout.
E/flutter (11292): #0      RenderBox.hitTest.<anonymous closure> (package:flutter/src/rendering/box.dart:2118:9)
E/flutter (11292): #1      RenderBox.hitTest (package:flutter/src/rendering/box.dart:2133:6)
E/flutter (11292): #2      RenderBoxContainerDefaultsMixin.defaultHitTestChildren.<anonymous closure> (package:flutter/src/rendering/box.dart:2488:24)
E/flutter (11292): #3      BoxHitTestResult.addWithRawTransform (package:flutter/src/rendering/box.dart:801:31)
E/flutter (11292): #4      BoxHitTestResult.addWithPaintOffset (package:flutter/src/rendering/box.dart:758:12)
E/flutter (11292): #5      RenderBoxContainerDefaultsMixin.defaultHitTestChildren (package:flutter/src/rendering/box.dart:2483:33)
E/flutter (11292): #6      RenderFlex.hitTestChildren (package:flutter/src/rendering/flex.dart:942:12)
E/flutter (11292): #7      RenderBox.hitTest (package:flutter/src/rendering/box.dart:2135:11)
E/flutter (11292): #8      _RenderSingleChildViewport.hitTestChildren.<anonymous closure> (package:flutter/src/widgets/single_child_scroll_view.dart:565:24)
E/flutter (11292): #9      BoxHitTestResult.addWithRawTransform (package:flutter/src/rendering/box.dart:801:31)
E/flutter (11292): #10     BoxHitTestResult.addWithPaintOffset (package:flutter/src/rendering/box.dart:758:12)
E/flutter (11292): #11     _RenderSingleChildViewport.hitTestChildren (package:flutter/src/widgets/single_child_scroll_view.dart:560:21)
E/flutter (11292): #12     RenderBox.hitTest (package:flutter/src/rendering/box.dart:2135:11)
E/flutter (11292): #13     RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:114:19)
E/flutter (11292): #14     RenderBox.hitTest (package:flutter/src/rendering/box.dart:2135:11)
E/flutter (11292): #15     RenderIgnorePointer.hitTest (package:flutter/src/rendering/proxy_box.dart:3064:31)
E/flutter (11292): #16     RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:114:19)
E/flutter (11292): #17     RenderBox.hitTest (package:flutter/src/rendering/box.dart:2135:11)
E/flutter (11292): #32     Ren
Restarted application in 10,979ms.
Malformed message

Can someone help me to render my widgets idk by making the whole screen scrollable

flutter-layout dart flutter
3 Answers

For a ListView, set shrinkWrap property to true

shrinkWrap: true

Why is this needed?

ListView always tries to fill all the available space given by the parent element. So, let's say that the parent is a Column, then, we know that the column takes the max height available, so if your list is longer then you'll be having a problem, there isn't enough space available. And if the list is smaller then it'll try to fill the available space, even though it can't.

With shrinkWrap: true, you can change this behavior so that the ListView only occupies the space it needs (it will still scroll when there more items).

user_138292910

I had the same error & in my case, The reason was SingleChildScrollView()

I add the ListView.builder into the container and set the container height as height:MediaQuery.of(context).size.height, and it worked for me.

Here is the sample :

class ListWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      height:MediaQuery.of(context).size.height,
      child: ListView.builder(
        itemCount: 5,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text('Contact $index'),
          );
        },
      ),
    );
  }
}

Now Add the ListWidget in SingleChildScrollView()

return SingleChildScrollView(
        child: Column(
          children: [
            //.......
            ListWidget(),
          ],
        )
    );

You can use it like this or you can simply add it in the SingleChildScrollView in case if you don't want to add anything rather than a list.

user_147918470

I had the same error & in my case The reason was SingleChildScrollView() try to remove it

user_83161830
Related