How can I open the file in arrayadapter list after clicking?

Question

I'm listing PDF files in folder. But I want them to be named as filename, instead of sdcard/mypath/files Also, I want to open them whenever I click them via PDF viewer. My code:

public class activity1 extends ListActivity {

private List<String> fileList = new ArrayList<String>();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    File root = new File("sdcard/mypath");
    ListDir(root);
}

void ListDir(File f) {
    File[] files = f.listFiles();
    fileList.clear();
    for (File file : files) {
        fileList.add(file.getPath());
    }
    ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, fileList);
    setListAdapter(directoryList);
}}

Answer 1

   public class activity1 extends ListActivity {
   ListView lv;
   private List<String> fileList = new ArrayList<String>();

  @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    File root = new File("sdcard/mypath");
      lv = getListView();
        ListDir(root);
       }

     void ListDir(File f) {
      File[] files = f.listFiles();
   fileList.clear();
for (File file : files) {
    fileList.add(file.getName());
}
ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, fileList);
setListAdapter(directoryList);
    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            viewPdf(fileList.get(i));
        }
    });
}

 }}

and open the file in pdf default pdf viewer

     private void viewPdf(String file) {

        File pdfFile = new File(Environment.getExternalStorageDirectory() +    "/" + "mypath"+ "/" + file);
        Uri path = Uri.fromFile(pdfFile);

       // Setting the intent for pdf reader
    Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
    pdfIntent.setDataAndType(path, "application/pdf");
    pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);


        startActivity(pdfIntent);
   }

Use the above code.. Hope it helps!