refactor(programs): 模板保存目录改为下载目录
- getDownloadsDirectory() 优先,失败时回退到应用文档目录 - 更新 dartdoc 说明
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@@ -18,11 +18,13 @@ class ExcelTemplateService {
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static const String sheetPrograms = 'Programs';
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static const String sheetSteps = 'Steps';
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/// 生成模板并保存到应用文档目录,返回文件对象
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/// 生成模板并保存到下载目录,返回文件对象
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///
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/// 优先使用系统下载目录;不支持时回退到应用文档目录。
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Future<File> generateTemplate() async {
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final excel = Excel.createExcel();
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final bytes = _buildTemplateBytes(excel);
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final dir = await getApplicationDocumentsDirectory();
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final dir = await getDownloadsDirectory() ?? await getApplicationDocumentsDirectory();
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final file = File('${dir.path}/program_template.xlsx');
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await file.writeAsBytes(bytes, flush: true);
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return file;
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