android - Opencsv 中的 java.io.FileNotFoundException

Question

我想读一个 CSV 文件。我尝试在 Android 应用程序中读取 CSV 文件

public float modelPredict(String StationNM, int day, int hour, int minute) {
        int[] model = new int[0];
        try {
            File csvfile = new File(Environment.getExternalStorageDirectory() + "/"+StationNM+".csv");
            CSVReader reader = new CSVReader(new FileReader("csvfile.getAbsolutePath()"));
//            CSVReader reader = new CSVReader(new FileReader(StationNM+".csv"));
            String[] nextLine;
            while ((nextLine = reader.readNext()) != null) {
                // nextLine[] is an array of values from the line
                System.out.println(nextLine[0] + nextLine[1] + "etc...");
            }
            model = new int[nextLine.length];
            for (int i=0; i<nextLine.length; i++) {
                model[i] = Integer.parseInt(nextLine[i]);
            }
        } catch (Exception e) {
            e.printStackTrace();
            //Toast.makeText(this, "The specified file was not found", T oast.LENGTH_SHORT).show();
        }

但我得到一个例外：

/System.err: java.io.FileNotFoundException: csvfile.getAbsolutePath() (No such file or directory)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(FileInputStream.java:231)
        at java.io.FileInputStream.<init>(FileInputStream.java:165)

我该如何解决？

我不知道“csvfile.getAbsolutePath()”中的输入是什么

在我的存储库中是https://github.com/Lay4U/CapstOne/tree/master/SC/MySubwayProject

标签： android

Answer 1

代替：

CSVReader reader = new CSVReader(new FileReader("csvfile.getAbsolutePath()"));

和：

CSVReader reader = new CSVReader(new FileReader(csvfile));