Android 文件操作

创建一个文件夹和文件

//创建文件夹
File dir = new File("路径", "文件夹名称");
if (!dir.exists()) {
    dir.mkdirs();
}

// 创建文件
File file = new File("路径", "文件名称");
if (!file.exists()) {
    file.createNewFile();
}

//删除文件
        File file = new File("xxxx/xx.txt");
        if (file.exists() && file.isFile()) {
            if (file.delete()) {
				Log.d("wangrui","Successfully deleted a single file");
            } else {
				Log.d("wangrui","Failed to delete a single file");
            }
        } else {
			Log.d("wangrui","The file does not exist and does not need to be deleted");
        }

//判断这个file是否为文件
			File file = new File("/cache/adb_magic.txt");
			if (file.exists() && file.isFile()) {
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