Cant receive data via bluetooth

Can anyone help me to check why the my program it cannot run the h = new Handler() and public void run() function [function for receive data from arduino].

MainActivity.java(Android Code):

package com.example.helloworld.ninjatechsmartheadphone;

import java.io.IOException;
import java.io.InputStream;
import java.iutputStream;
import java.lang.reflect.Method;
import java.util.UUID;

import android.support.v7.app.AppCompatActivity;
import android.bluetooth.BluetoothAdapter;
import...

Cant receive data via bluetooth

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