FileNotFoundException: /mimetype/mnt/sdcard/file.csv 的异常

Question

我想读取SD卡中的csv文件，但是当我选择文件时，有一个文件不能被找到的异常。

代码如下：

Intent intent = new Intent();             
    intent.setType("file/csv");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Select csv"),
            SELECT_CSV_Dialog);

 if (resultCode == RESULT_OK) {
 if (requestCode == 1) {
  data = result.getData();//data is the URI
 System.out.println("res "+data);
 if (data.getLastPathSegment().endsWith("csv") || data.getLastPathSegment().endsWith("CSV")) {       
     try {
         File f = new File(data.getPath());//this is where i get the file not found             
         FileInputStream  fis =new FileInputStream(f);   
            fis = this.openFileInput(data.toString());
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(fis));
                             String line;
            while ((line = reader.readLine()) != null) {
                String[] RowData = line.split(",");
                System.out.println("row  "+RowData.length);
                if(RowData.length==2){                      

        Toast.makeText(Importt.this, "Schema Supported", Toast.LENGTH_SHORT).show();
                    break;
                }else{
    Toast.makeText(Importt.this, "Schema not Supported", Toast.LENGTH_SHORT).show();
                }
            }}

我从这里获取的错误："File f = new File(data.getPath());"
为什么会出现这个异常呢？

Answer 1

使用下面的代码从csv 文件中读取数据。

try
   {
    List<String> list = new ArrayList<String>();
    String line;

    String fileName = "/mnt/sdcard/test.csv";
    FileReader reader = new FileReader(fileName);
    BufferedReader bufrdr = new BufferedReader(reader);
    line = bufrdr.readLine();
    while (line != null) {
        list.add(line);
        line = bufrdr.readLine();
    }
    bufrdr.close();
    reader.close();

    String[] array = new String[list.size()];
    list.toArray(array);

    for (int i = 0; i < list.size(); i++) {
        System.out.println(" 22222222 0 0 " + list.get(i).toString() );
    }

 }
  catch (Exception e) {
    // TODO: handle exception
    e.printStackTrace();
}

对于 SD-CARD 使用下面的代码检查：

static public boolean hasStorage(boolean requireWriteAccess) {
    //TODO: After fix the bug,  add "if (VERBOSE)" before logging errors.
    String state = Environment.getExternalStorageState();
    Log.v(TAG, "storage state is " + state);

    if (Environment.MEDIA_MOUNTED.equals(state)) {
        if (requireWriteAccess) {
            boolean writable = checkFsWritable();
            Log.v(TAG, "storage writable is " + writable);
            return writable;
        } else {
            return true;
        }
    } else if (!requireWriteAccess && Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
        return true;
    }
    return false;
}