如何使用 Gluon 插件在 JavaFX 中写入/读取

Question

I am trying to write/read files in JavaFX while using the Gluon plugin, and I am not having any luck. If i run the program as a Desktop App, it works fine, I've even used the same functions in Android IDE and it works fine, however if I send the program to my phone with Gluon, it does not work. I wanting to know how to save/read to files in Gluon, and what have I done wrong, and why does it work as Desktop and on Android but not Gluon. The two fcns I used are:

public void writeToFile() {

  try {

      FileOutputStream f = new FileOutputStream("Meal1_Protein.txt");
      f.write(choice.getBytes()); //Choice is input from a dropdown
         f.close();

  } catch (FileNotFoundException e) {
      e.printStackTrace();
  } catch (IOException e) {
      e.printStackTrace();
  }
  Toast toast = new Toast(choice);
  toast.show();

 }

public void readFromFile(){

try {
    FileInputStream f = new FileInputStream("Meal1_Protein.txt");
    InputStreamReader is = new InputStreamReader(f);
    BufferedReader br = new BufferedReader(is);
    StringBuffer buff = new StringBuffer();

    String lines;

    while((lines = br.readLine())!=null){

        buff.append(lines);
        buff.append("\n");
    }


   carbInput.setText(buff.toString()); // inserting into a txtfield 
   //to see if it I can read strings back in. 
    Toast toast = new Toast(buff.toString());
    toast.show();

} catch (FileNotFoundException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

}

Answer 1

Please using StorageService .

The storage service provides access to the private and public storage locations for the application offered by the native platform.