android - How to Choose a file from files in SDCard? -

i have text files on android's sd card, , need access 1 of them. came across below code here:

  //find directory sd card using api //*don't* hardcode "/sdcard" file sdcard = environment.getexternalstoragedirectory();  //get text file file file = new file(sdcard,"file.txt");  //read text file stringbuilder text = new stringbuilder();  try {     bufferedreader br = new bufferedreader(new filereader(file));     string line;      while ((line = br.readline()) != null) {         text.append(line);         text.append('\n');     } } catch (ioexception e) {     //you'll need add proper error handling here }  //find view id textview tv = (textview)findviewbyid(r.id.text_view);  //set text tv.settext(text); 

but in part of code:

//get text file  file file = new file(sdcard,"file.txt"); 

the name of text file specified need user choose text file wants (from text files in sd card). how can let user brows sd card , choose file wants?

you need file chooser/browser created here. there lots of libraries available using can achieve required functionality. here 1 -

https://code.google.com/p/android-file-chooser/

also, necessary code required on first page. invoke file chooser, need write these lines of code -

intent intent = new intent(this, filechooser.class); arraylist<string> extensions = new arraylist<string>(); extensions.add(".txt"); //can used multiple filters intent.putstringarraylistextra("filterfileextension", extensions); startactivityforresult(intent, file_chooser); 

and, callback path of selected file user -

@override public void onactivityresult(int requestcode, int resultcode, intent data) {    if ((requestcode == file_chooser) && (resultcode == -1)) {       string fileselected = data.getstringextra("fileselected");       toast.maketext(this, fileselected, toast.length_short).show();    }                    }