带有包序列号进度对话框的文件下载器应用程序
带有包序列号进度对话框的文件下载器应用程序
提问于 2021-11-23 16:07:28
如何将progress_dialog包修改为sn_progress_dialog包？我正在尝试制作一个带有进度对话框的文件下载应用程序，但progress_dialog包不是空安全的。
Future _downloadAndSaveFileToStorage(String urlPath) async {
final name = urlPdf.split('/').last;
ProgressDialog pr;
pr = ProgressDialog(context, type: ProgressDialogType.Normal);
pr.style(message: "Download file ...");
try{
await pr.show();
final Directory _documentDir = Directory('/storage/emulated/0/MyDocuments/$name');
await dio!.download(urlPath, _documentDir.path, onReceiveProgress: (rec, total){
setState(() {
_isLoading = true;
progress = ((rec / total)*100).toStringAsFixed(0) + " %";
print(progress);
pr.update(message: "Please wait : $progress");
});
});
pr.hide();
_fileFullPath = _documentDir.path;
} catch (e) {
print(e);
}
setState(() {
_isLoading = false;
});
}这是我的screenshot应用程序和progress_dialog包。
回答 2
Stack Overflow用户
回答已采纳
发布于 2021-11-23 17:38:05
只需要稍微调整一下：
Future _downloadAndSaveFileToStorage(String urlPath) async {
final name = urlPdf.split('/').last;
ProgressDialog pd = ProgressDialog(context: context);
try{
pd.show(
max: 100,
msg: 'Preparing Download...',
progressType: ProgressType.valuable,
backgroundColor: Color(0xff212121),
progressValueColor: Color(0xff3550B4),
progressBgColor: Colors.white70,
msgColor: Colors.white,
valueColor: Colors.white
);
final Directory _documentDir = Directory('/storage/emulated/0/MYDocuments/$name');
await dio!.download(urlPath, _documentDir.path, onReceiveProgress: (rec, total){
setState(() {
_isLoading = true;
int progress = (((rec / total) * 100).toInt());
print(progress);
pd.update(value: progress, msg: 'File Downloading');
});
});
pd.close();
_fileFullPath = _documentDir.path;
} catch (e) {
pd.close();
print(e);
}
setState(() {
_isLoading = false;
});
}Stack Overflow用户
发布于 2021-11-23 16:24:44
如下所示：
Future _downloadAndSaveFileToStorage(String urlPath) async {
final name = urlPdf.split('/').last;
ProgressDialog pd = ProgressDialog(context: context);
try{
pd.show(max: 100, msg: 'Download file ...');
final Directory _documentDir = Directory('/storage/emulated/0/MyDocuments/$name');
await dio!.download(urlPath, _documentDir.path, onReceiveProgress: (rec, total){
setState(() {
_isLoading = true;
progress = ((rec / total)*100).toStringAsFixed(0) + " %";
print(progress);
pd.update(progress);
});
});
pd.close();
_fileFullPath = _documentDir.path;
} catch (e) {
pd.close();
print(e);
}
setState(() {
_isLoading = false;
});
}您可以在show方法中更改颜色或消息，如下所示：
pd.show(
max: 100,
msg: 'Preparing Download...',
progressType: ProgressType.valuable,
backgroundColor: Color(0xff212121),
progressValueColor: Color(0xff3550B4),
progressBgColor: Colors.white70,
msgColor: Colors.white,
valueColor: Colors.white);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/70084117
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