让用户选择应用程序在flutter中打开地图

Question

我正在尝试根据用户的选择启动地图应用程序。但我手机上的谷歌地图是打开的，在包含应用程序列表的底部表格打开之前。我想等到用户选择应用程序。我该如何做到这一点？

这是我打开地图的代码，如果任务类型是地址

GestureDetector(
onTap: () async {
try {
launchUrl(
Uri.parse("geo:${address.lat},${address.lng}"),
mode: LaunchMode.externalApplication,
);
} finally {
launchUrl(Uri.parse(
"google.navigation:q=${address.lat},${address.lng}&mode=d"));
}
},
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.end,
children: [
CommonText(
text: kLanguageList!.value.googleMaps.obs,
size: 1,
textColor: kGreen,
boldText: false,
underline: TextDecoration.underline,
),
Image.asset(
kGoogleMapLogo,
scale: 20,
),
],
),
),

Answer 1

我忘记删除代码中的finally。我认为finally block总是执行，而不关心try block。

GestureDetector(
onTap: () async {
launchUrl(
Uri.parse("geo:${address.lat},${address.lng}"),
mode: LaunchMode.externalApplication,
);
},
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.end,
children: [
CommonText(
text: kLanguageList!.value.googleMaps.obs,
size: 1,
textColor: kGreen,
boldText: false,
underline: TextDecoration.underline,
),
Image.asset(
kGoogleMapLogo,
scale: 20,
),
],
),
)

我终于卸下了，一切都很好。或者我们可以使用catch(e)来显示错误或异常。我使用urlauncher来启动谷歌地图。