我如何在从 api 获取图像时获得加载屏幕？

Question

I want a loading screen when i shake screen and 10 more images loads from api.

 void initState() {
    super.initState();
    _shakePlugin = FlutterShakePlugin(
      onPhoneShaken: (){
        //do stuff on phone shake
        setState(() {
          
          count=count+10;
           
           
        });
      },
    )..startListening();
  }

Future<String> getjsondata() async {
    try {
      
      var response = await http.get(
          'https://api.unsplash.com/search/photos?per_page=${count}&client_id=TcAQEO3JoMG90U7Rl-YUiDo1x9XbZukzMOMQhxUVCV4&query=${_search}');
      setState(() {
        var converted = json.decode(response.body);
        data = converted['results'];
      });
      
    } catch (e) {}
    return 'success';
  }

Whenever i increment the count by 10,i need a loading widget to show until it fetches the images from api.

Answer 1

使用FutureBuilder处理不同的快照条件和连接状态以显示不同的小部件

Answer 2

通过以下代码使用 FutureBuilder

FutureBuilder(
        future: getjsondata(),
        builder: (_, dataSnapshot) {
          if (dataSnapshot.connectionState == ConnectionState.waiting) {
            return Center(child: CircularProgressIndicator());
          } else {
            return Container(.....) // Show your images here & take data using dataSnapshot.data
          }
        },
      ),

我如何在从 api 获取图像时获得加载屏幕？

How do i get a loading screen while i fetch images from api?

loading

dart

flutter