Filewriter问题- Java Android

Question

我的文件写入器似乎不能创建文件。

这是我的代码：

public void peopledetails_write(ArrayList<PeopleDetails> peopledetails_file) {
        ////numbers is the arraylist of numbers.
        ///names is the arraylist of names of people.
        ///Written to file like 01235 678 908, Daniel; 01245 645 123, Bob Marley; etc.
        ///Like a CSV file. 
        try{
            FileWriter writer_file = new FileWriter("PeopleDetailsFile");

            String filestring = ""; ///initializes filestring, which is written to the file.
            for(PeopleDetails person : peopledetails_file){
                String person_detail_string = "";
                person_detail_string = person.name + "," + person.number;
                filestring = filestring + person_detail_string + ";";

            }
            writer_file.write(filestring);
            writer_file.close();
        }
            catch (IOException e) {
                Log.e("ERROR", e.toString());

        }finally{
            ///Hopefully won't get an error here.
            Intent switch_menu = new Intent(this, MenuList.class);
            startActivity(switch_menu);
        }
    }

它在最后采取行动，并将用户带回我的应用程序的主菜单。我已经成功地调试了这段代码所在的部分，并认为这是错误代码，因为我得到了一个FileNotFound exception，因为这一部分应该已经编写了一个文件。

这段代码有什么问题？

Answer 1

这就是问题所在，除非api指向某个特定的目录，否则应该始终使用绝对文件路径(完整的文件路径)。

FileWriter writer_file = new FileWriter(complete_file_path);