how to get the name of an image from galary in android

protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK && requestCode == PICK_IMAGE)
        {
            Uri imageUri = data.getData();
            imageView.setImageURI(imageUri);
        }
        if (resultCode == RESULT_OK) {

            Uri selectedImageUri = data.getData();
            File f = new File("" + selectedImageUri);
            String s = getRealPathFromURI(selectedImageUri);
            f.getName();

            TextView tv= (TextView) findViewById(R.id.textView);
            tv.setText(s);
        }
    }

    public String getRealPathFromURI(Uri uri) {
        String[] projection = { MediaStore.Images.Media.DATA };
        @SuppressWarnings("deprecation")
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);

    }