删除内部保存文件-Android

Question

How do I delete an internal save file dynamically in an Android application? I saved it in the default directory so I don't know the exact file path. Here is the code I used to save my files if that helps any:

public void saveAssignments(){

    String saveData = "";
    String FILENAME = name.replaceAll(" ", "") + ".txt";
    //Context context = getApplicationContext();
    Context context = getActivity();
    FileOutputStream fos;

    for(int i = 0; i < allEds.size(); i++){
            saveData = saveData + allEds.get(i).getText().toString() + ", ";
    }


    try{
        fos = context.openFileOutput( FILENAME, Context.MODE_PRIVATE );
        try{
            fos.write(saveData.getBytes());
            fos.close();
            //Toast.makeText(context, "Saved as " + FILENAME, 5000).show(); //popup message
        } catch (IOException e) {
            e.printStackTrace();
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

Answer 1

You could use method

deleteFile(String filename) 

on your context-object.

http://developer.android.com/reference/android/content/Context.html#deleteFile%28java.lang.String%29

Furthermore you could use

 String[] fileList ()

to query your files.

http://developer.android.com/reference/android/content/Context.html#fileList%28%29

Answer 2

You can delete file created by using openFileOutput method as:

File file=new File(context.getFilesDir().getAbsolutePath()+"/"+FILENAME);
if(file.exists())file.delete();

Answer 3

You should try

getFilesDir() from context to return path or refer to here . Then you can delete it.