在文本小部件中一次显示一个数组项

Question

我正在使用这个数组在 Text Widget 中使用它的值：

var heartData = ['76','76','80', '76','82','75','73','75'];

现在我想在文本小部件中一一显示这个数组数据：

StreamBuilder<List<int>>(
                                    stream: stream,
                                    initialData: lastValue,
                                    builder: (BuildContext context,
                                        AsyncSnapshot<List<int>> snapshot) {
                                      if (snapshot.connectionState ==
                                          ConnectionState.active) {
                                        var currentVal =
                                            snapshot.data.toString();
                                        int currentValue = int.parse(
                                            currentVal.substring(
                                                1, currentVal.length - 1),
                                            onError: (source) => -1);
                                        print("String data $currentValue");
                                        if (currentValue == 2) {
                                      
                                          return FutureBuilder(
                                              future: Future.delayed(
                                                  const Duration(seconds: 0),
                                                  () async {
    
                                                Seziurealert();
                                              }),
                                              builder: (context, snapshot) {
             // I want to display array data here one by one
                                                return Text(
                                                  'heartData[i]',
                                                  style: TextStyle(
                                                    fontFamily:
                                                        'SF Pro Display',
                                                    fontSize: 19,
                                                    color:
                                                        const Color(0xffffffff),
                                                    fontWeight: FontWeight.w500,
                                                    height: 1.4736842105263157,
                                                  ),
                                                );
                                              });
                                        } else if (currentValue == 0) {
                                          return Text(
                                            'Device not calibrated',
                                            style: TextStyle(
                                              fontFamily: 'SF Pro Display',
                                              fontSize: 19,
                                              color: const Color(0xffffffff),
                                              fontWeight: FontWeight.w500,
                                              height: 1.4736842105263157,
                                            ),
                                          );
                                        } else if (currentValue == 1) {
    // I want to display array data here one by one
                                          return Text(
                                            'heartData[i]',
                                            style: TextStyle(
                                              fontFamily: 'SF Pro Display',
                                              fontSize: 19,
                                              color: const Color(0xffffffff),
                                              fontWeight: FontWeight.w500,
                                              height: 1.4736842105263157,
                                            ),
                                          );
                                        }
    // I want to display array data here one by one
                                        return Text(
                                          'heartData[i]',
                                          style: TextStyle(
                                            fontFamily: 'SF Pro Display',
                                            fontSize: 19,
                                            color: const Color(0xffffffff),
                                            fontWeight: FontWeight.w500,
                                            height: 1.4736842105263157,
                                          ),
                                        );
                                      } else {
                                        return Text(
                                          'Check the stream',
                                          style: TextStyle(
                                            fontFamily: 'SF Pro Display',
                                            fontSize: 19,
                                            color: const Color(0xffffffff),
                                            fontWeight: FontWeight.w500,
                                            height: 1.4736842105263157,
                                          ),
                                        );
                                      }
                                    },
                                  ),

请帮助我如何在我的文本小部件中使用这个数组？我在 Stream Builder 中使用此文本，并且在满足条件时显示文本小部件 我想一一获取这些数据，而不是列表形式。我怎样才能做到这一点？ 提前谢谢！

Answer 1

数组中有一个名为join的方法，你可以调用它：

 return Text(
  heartData.join(),
  style: TextStyle (
    fontFamily: 'SF Pro Display',
    fontSize: 19,
    color: const Color(0xffffffff),
    fontWeight: FontWeight.w500,
    height: 1.4736842105263157,
  ),
);

结果将是 7676807682757375

您也可以将分隔符传递给此函数heartData.join(separator: "-")

结果将是 76-76-80-76-82-75-73-75