android studio启动service没有输出

Question

想要启动service后在线程中输出EditText的内容，但是真机调试报错没有看到输出，求大神帮忙看下是什么问题。下面贴出代码：
activity_main.xml：
<?xml version="1.0" encoding="utf-8"?>
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.vancool.connectservice.MainActivity">

<EditText
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Hello World!"
    android:id="@+id/edData"/>
<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/btnStartService"
    android:text="启动服务"/>
<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/btnStopService"
    android:text="停止服务"/>

MainActivity.java
package com.vancool.connectservice;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

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

    data = (EditText) findViewById(R.id.edData);
    findViewById(R.id.btnStartService).setOnClickListener(this);
    findViewById(R.id.btnStopService).setOnClickListener(this);

}


@Override
public void onClick(View view) {
    switch (view.getId())
    {
        case R.id.btnStartService:
            Intent i = new Intent(this, MyService.class);
            i.putExtra("data", data.getText().toString());
            startService(i);
            break;
        case R.id.btnStopService:
            stopService(new Intent(this, MyService.class));
            break;
        default:
            break;
    }
}

}

MyService.java
package com.vancool.connectservice;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;

public class MyService extends Service {
private boolean running = false;
private String data = "默认信息";

public MyService() {
}

@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    data = intent.getStringExtra("data");
    return super.onStartCommand(intent, flags, startId);
}

@Override
public void onCreate() {
    super.onCreate();
    running = true;
    new Thread(){
        @Override
        public void run() {
            super.run();

            while(running)
            {
                System.out.println(data);

                try {
                    sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }.start();
}

@Override
public void onDestroy() {
    super.onDestroy();
    running = false;
}

}

Answer 1

报错代码是什么，Service在清单文件中注册了吗