copyAssetToLocal static method

Future<String> copyAssetToLocal(
  1. String asset, {
  2. bool rewrite = false,
})

将资源复制到本地 asset Flutter资源 rewrite 当存在相同文件的，是否覆盖 Return Copy后的本地资源路径

Implementation

static Future<String> copyAssetToLocal(String asset,
    {bool rewrite: false}) async {
  int lastIndex = asset.lastIndexOf("/");

  // 初始化目录
  final dir = await getApplicationDocumentsDirectory();
  Directory rootDir = new Directory(
      "${dir.path}${lastIndex != -1 ? "/${asset.substring(0, lastIndex)}" : ""}");
  if (!(await rootDir.exists())) {
    await rootDir.create(recursive: true);
  }

  // 初始化文件
  final file = new File(
      "${rootDir.path}${lastIndex == -1 ? asset : asset.substring(lastIndex)}");
  if (await file.exists() && rewrite) {
    file.deleteSync();
  }

  if (!(await file.exists())) {
    final soundData = await rootBundle.load(asset);
    final bytes = soundData.buffer.asUint8List();
    await file.writeAsBytes(bytes, flush: true);
  }

  return file.path;
}