Show all .txt files from a folder in an activity

Question

I have a application where the user can write a text into a EditText and the written text is saved in an auto generated .txt file.

Now I want to show all the txt files from the folder in an activity, not like a regular file browser, just the title of the .txt files in a ListView or as a TextView (each file is illustrated as a TextView).

Answer 1

Get the path of that directory as string and create a new file with this path then,

String path=Environment.getExternalStorageDirectory().getAbsolutePath()+"..../yourFolder"; 

File file=new File(path);

or

File file=new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"..../yourFolder");

Use file.list which will give u all files name in form of an array then use a for loop with endsWith function and store data into a list like this

String arr[]=file.list();
List l=new ArrayList<>();
for(String i:arr){
    if(i.endsWith(".txt")){
       l.add(i);
    }
}

you will have names all text files under selected directory in list l

Answer 2

In Java 8 you can use Files API and Stream API

Files
    .list(Paths.get("."))
    .forEach(System.out::println);