Unable to print out information from file? Android application

Question

Hi I am trying to display the information from a file:

For some reason the first file I used(temp.txt) works and I get this output

Your Body Temperature Readings are: 36.2
32
37.d

my temp.txt file

36.2
32
37.d

however any other file that I send to my phone(via bluetooth) and then try and read with the app presents no output, what am I doing wrong?

For example I sent another file temppp.txt with information below and I got the output:

Your Body Temperature Readings are: 

my temppp.txt

37.06750839
36.89390613
36.88484785
36.81941363
36.81815453

Here is my class which is called on a button click and opens up a new view that has the bodyTempInfoArray textview.

package com.teamfara.circadianrhythmmonitor4;

import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;

public class bodyTempInfo extends AppCompatActivity {


    ArrayList<Double> currentBodyTemp;

    private void displayBodyTemp(String bodyTemp) {
        TextView textView = (TextView) findViewById(R.id.bodyTempInfoArray);
        textView.setText(bodyTemp);
    }

    public void displayCurrentBodyTempArray(View view) throws FileNotFoundException {

        ArrayList<Double> list = new ArrayList<>();

        File sdcard = Environment.getExternalStorageDirectory();

//Get the text file


//Read text from file

        File file = new File(sdcard, "temppp.txt");

        StringBuilder text = new StringBuilder();

        try {

            BufferedReader br = new BufferedReader(new FileReader(file));
            String line;

            while ((line = br.readLine()) != null) {
                list.add(Double.parseDouble(line));
                text.append(line);
                text.append('\n');
            }
            br.close();
        }
        catch(IOException e) {

        }

        currentBodyTemp = list;
        displayBodyTemp("Your Body Temperature Readings are: " + text);

    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_body_temp_info);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        try {
            displayCurrentBodyTempArray(findViewById(R.id.bodyTempInfoArray));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }