코드오류가 없는데 apk변환후 폰으로 실행하면 계속 튕깁니다.

Question

저번엔 됐엇는데 이번에 다시 apk파일로 변환하고 폰으로 실행하니까 

계속 튕겨서 미치겟습니다ㅠㅠ 

방법을 달리해서 apk파일 변환한것도 아닌데 왜그러나요..

 

package com.naver.steps;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.PersistableBundle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements SensorEventListener {

    TextView tv_steps;

    SensorManager sensorManager;

    boolean running = false;




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv_steps = (TextView) findViewById(R.id.tv_steps);

        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);



    }

    @Override
    protected void onResume() {
        super.onResume();
        running = true;
        Sensor countSensor = sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
        if(countSensor != null) {
            sensorManager.registerListener(this, countSensor, SensorManager.SENSOR_DELAY_UI);
        } else {
            Toast.makeText(this, "Sensor not found!", Toast.LENGTH_SHORT).show();

    }

}

    @Override
    protected void onPause() {
        super.onPause();
        running = false;
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if(running){
            tv_steps.setText(String.valueOf(event.values[0]));
        }

    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {



    }
}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_main"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:paddingBottom="16dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="16dp"


    tools:context="com.naver.steps.MainActivity">

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="기타"
        app:showAsAction="never" />



    <TextView
        android:id="@+id/tv_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Steps" />

    <TextView
        android:id="@+id/tv_steps"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="0"
        android:textSize="40dp" />



</LinearLayout>