diff --git "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/AndroidManifest.xml" "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/AndroidManifest.xml"
index d6f83fd03..8ee62644d 100644
--- "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/AndroidManifest.xml"
+++ "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/AndroidManifest.xml"
@@ -16,6 +16,7 @@
         android:theme="@style/AppTheme">
         <activity android:name=".MusicList1"></activity>
 
+
         <service
             android:name=".MusicPlayerService"
             android:enabled="true"
diff --git "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/FileUtils.java" "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/FileUtils.java"
index 0a87f36fe..8edf13b79 100644
--- "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/FileUtils.java"
+++ "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/FileUtils.java"
@@ -1,8 +1,7 @@
-package edu.androidlabs.thirdtest;
+package edu.androidlabs.thirdtest;
 
 
 import android.os.Environment;
-
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
diff --git "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/HttpDownloader.java" "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/HttpDownloader.java"
index 70a35ec9a..916ef254e 100644
--- "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/HttpDownloader.java"
+++ "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/HttpDownloader.java"
@@ -1,4 +1,4 @@
-package edu.androidlabs.thirdtest;
+package edu.androidlabs.thirdtest;
 
 import java.io.File;
 import java.io.IOException;
@@ -6,7 +6,6 @@
 import java.net.HttpURLConnection;
 import java.net.URL;
 
-
 public class HttpDownloader {
 
     //可以下载任意文件，例如MP3，并把文件存储在制定目录（-1：下载失败，0：下载成功，1：文件已存在）
diff --git "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/MainActivity.java" "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/MainActivity.java"
index e27782911..9b80e42ba 100644
--- "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/MainActivity.java"
+++ "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/MainActivity.java"
@@ -1,4 +1,4 @@
-package edu.androidlabs.thirdtest;
+package edu.androidlabs.thirdtest;
 
 
 import android.content.Context;
@@ -15,7 +15,6 @@
 
 public class MainActivity extends AppCompatActivity{
 
-
     private Button listbtn = null, stopbtn = null;
     private TextView etinfo;
     private Button but2;
diff --git "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/activity_main.xml" "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/activity_main.xml"
index c9469d2b8..019f4ff92 100644
--- "a/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/activity_main.xml"
+++ "b/students/soft1714080902425/\345\256\236\351\252\214\345\205\255/activity_main.xml"
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -11,6 +11,7 @@
         android:gravity="center_horizontal"
         android:orientation="vertical"
         android:background="#00BB64">
+
         <Button
             android:id="@+id/musicList"
             android:layout_width="match_parent"