android简易文件管理器的用法

很久没有写东西了，鉴于某某同学文件管理器不会，这里简单介绍一下，同时写一个demon，参考了网上别人写的代码，自己也学习学习，研究研究。

　　首先所谓文件管理器，看起来就是一个列表，列表里面是文件夹或者文件，首先把布局写出来，我想在最上方的左边显示文件的路径，右边显示该路径下的文件个数，其实还是一个遍历文件，然后用列表显示出来的问题。下面是ListView，用来显示文件列表。下面是运行的效果图：

 

主界面的布局文件如下:

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     android:orientation="vertical" > 6     <RelativeLayout  7         android:id="@+id/top" 8         android:layout_width="match_parent" 9         android:layout_height="wrap_content">10        <TextView 11            android:id="@+id/path"12            android:layout_width="wrap_content"13            android:layout_height="wrap_content"14            android:layout_alignParentLeft="true"15            android:layout_centerVertical="true"16            android:textSize="@*android:dimen/list_item_size"17            android:textColor="@android:color/white"/>18         19         <TextView 20             android:id="@+id/item_count"21             android:layout_width="wrap_content"22             android:layout_height="wrap_content"23             android:textSize="@*android:dimen/list_item_size"24             android:textColor="@android:color/white"25             android:layout_alignParentRight="true"26             android:layout_centerVertical="true"/>27     </RelativeLayout>28    <View 29         android:layout_width="match_parent"30         android:layout_height="2dip"31         android:background="#09c"/>32 33    <LinearLayout34         android:orientation="vertical"35         android:layout_width="match_parent"36         android:layout_height="match_parent">37         38         <ListView 39             android:id="@+id/file_list"40             android:layout_height="match_parent"41             android:layout_width="match_parent"42             android:fadingEdge="none"43             android:cacheColorHint="@android:color/transparent"/>44     </LinearLayout>45 </LinearLayout>

 

首先在oncreate方法里面调用一个方法去获取布局文件里面的id：

1 @Override2     protected void onCreate (Bundle savedInstanceState) {3         super.onCreate(savedInstanceState);4         setContentView(R.layout.file_manager);5         initView();6     }

 

initView之后添加apk的权限，777 表示可读可写可操作。

 1 private void initView() { 2         mListView = (ListView) findViewById(R.id.file_list); 3         mPathView = (TextView) findViewById(R.id.path); 4         mItemCount = (TextView) findViewById(R.id.item_count); 5         mListView.setOnItemClickListener(this); 6         String apkRoot = "chmod 777 " + getPackageCodePath();  7         RootCommand(apkRoot); 8         File folder = new File("/"); 9         initData(folder);10     }

 

修改Root权限的方法：

 1 public static boolean RootCommand (String command) { 2         Process process = null; 3         DataOutputStream os = null; 4         try { 5             process = Runtime.getRuntime().exec("su"); 6             os = new DataOutputStream(process.getOutputStream()); 7             os.writeBytes(command + "\n"); 8             os.writeBytes("exit\n"); 9             os.flush();10             process.waitFor();11         }12         catch (Exception e) {13             return false;14         }15         finally {16             try {17                 if (os != null) {18                     os.close();19                 }20                 process.destroy();21             }22             catch (Exception e) {23                 e.printStackTrace();24             }25         }26         return true;27     }

 

完了之后我们要获取根目录下面的所有的数据，然后设置到我们的ListView中让它显示出来。

 1  private void initData(File folder) { 2         boolean isRoot = folder.getParent() == null;  3         mPathView.setText(folder.getAbsolutePath());   4         ArrayList<File> files = new ArrayList<File>();    5         if (!isRoot) { 6             files.add(folder.getParentFile());   7         } 8         File[] filterFiles = folder.listFiles();   9         mItemCount.setText(filterFiles.length + "项"); 10         if (null != filterFiles && filterFiles.length > 0) {11             for (File file : filterFiles) {12                 files.add(file);13             }14         }15         mFileAdpter = new FileListAdapter(this, files, isRoot);  16         mListView.setAdapter(mFileAdpter);17     }

 

首先是获取当前是否是根目录，然后把文件的路径设置给我们要显示的View。

然后用一个ArrayList来装我们目录下的所有的文件或者文件夹。

首先要把这个文件夹的父类装到我们的列表中去，然后把这个文件夹下的子文件都拿到，也装在列表中，然后调用Adapter显示出来。既然说到了Adapter, 那就看下Adapter吧。

 1 private class FileListAdapter extends BaseAdapter { 2  3         private Context context; 4         private ArrayList<File> files; 5         private boolean isRoot; 6         private LayoutInflater mInflater; 7          8         public FileListAdapter (Context context, ArrayList<File> files, boolean isRoot) { 9             this.context = context;10             this.files = files;11             this.isRoot = isRoot;12             mInflater = LayoutInflater.from(context);13         }14         15         @Override16         public int getCount () {17             return files.size();18         }19 20         @Override21         public Object getItem (int position) {22             return files.get(position);23         }24 25         @Override26         public long getItemId (int position) {27             return position;28         }29         30         @Override31         public View getView (int position, View convertView, ViewGroup parent) {32             ViewHolder viewHolder;33             if(convertView == null) {34                 viewHolder = new ViewHolder();35                 convertView = mInflater.inflate(R.layout.file_list_item, null);36                 convertView.setTag(viewHolder);37                 viewHolder.title = (TextView) convertView.findViewById(R.id.file_title);38                 viewHolder.type = (TextView) convertView.findViewById(R.id.file_type);39                 viewHolder.data = (TextView) convertView.findViewById(R.id.file_date);40                 viewHolder.size = (TextView) convertView.findViewById(R.id.file_size);41             } else {42                 viewHolder = (ViewHolder) convertView.getTag();43             }44             45             File file = (File) getItem(position);46             if(position == 0 && !isRoot) {47                 viewHolder.title.setText("返回上一级");48                 viewHolder.data.setVisibility(View.GONE);49                 viewHolder.size.setVisibility(View.GONE);50                 viewHolder.type.setVisibility(View.GONE);51             } else {52                 String fileName = file.getName();53                 viewHolder.title.setText(fileName);54                 if(file.isDirectory()) {55                     viewHolder.size.setText("文件夹");56                     viewHolder.size.setTextColor(Color.RED);57                     viewHolder.type.setVisibility(View.GONE);58                     viewHolder.data.setVisibility(View.GONE);59                 } else {60                     long fileSize = file.length();61                     if(fileSize > 1024*1024) {62                         float size = fileSize /(1024f*1024f);63                         viewHolder.size.setText(new DecimalFormat("#.00").format(size) + "MB");64                     } else if(fileSize >= 1024) {65                         float size = fileSize/1024;66                         viewHolder.size.setText(new DecimalFormat("#.00").format(size) + "KB");67                     } else {68                         viewHolder.size.setText(fileSize + "B");69                     }70                     int dot = fileName.indexOf('.');71                     if(dot > -1 && dot < (fileName.length() -1)) {72                         viewHolder.type.setText(fileName.substring(dot + 1) + "文件");73                     }74                     viewHolder.data.setText(new SimpleDateFormat("yyyy/MM/dd HH:mm").format(file.lastModified()));75                 }76             }77             return convertView;78         }79         80         class ViewHolder {81             private TextView title;82             private TextView type;83             private TextView data;84             private TextView size;85         }86     }

 看下adapter的布局文件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView            android:id="@+id/file_title"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           android:textSize="25sp"           android:textColor="#fff000"/>    <LinearLayout         android:id="@+id/file_info"        android:layout_width="match_parent"        android:layout_height="wrap_content">        <TextView             android:id="@+id/file_size"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:textColor="#ffffcc"            android:layout_weight="1"            android:textSize="18sp"/>                <TextView             android:id="@+id/file_type"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:textColor="#ffffcc"            android:layout_weight="1"            android:gravity="right"            android:textSize="18sp"/>        <TextView             android:id="@+id/file_date"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:textColor="#ffffff"            android:layout_weight="1"            android:gravity="right"            android:textSize="18sp"/>    </LinearLayout></LinearLayout>

列表的Item项分2行显示，上面一行显示文件名

下面一行分别显示文件大小，文件类型，文件修改时间。

我们可以通过File file = (File) getItem(position);拿到Item项的文件，如果是在第一个并且不再根目录我们就把第一个也就是parentFile显示为：“返回上一级”，下一行的都隐藏掉。

如果不是第一个位置，可以拿到这个文件的一系列信息。

先把String fileName = file.getName();文件名拿到，显示出来。

如果这个文件是一个文件夹，就把文件的大小显示为“文件夹”，类型和修改时间隐藏掉。

如果不是一个文件夹， 可以拿到文件的长度long fileSize = file.length();

根据特定的长度显示文件的大小，B， KB， MB， GB等。

然后拿到文件的类型，通过最后一个“.”之后的字符串就是该文件的类型。

通过viewHolder.data.setText(new SimpleDateFormat("yyyy/MM/dd HH:mm").format(file.lastModified())); 设置文件的最近修改时间。

然后可以设置每个Item项的点击事件，如下所示：

 1  @Override 2     public void onItemClick (AdapterView<?> parent, View view, int position, long id) { 3         File file = (File) mFileAdpter.getItem(position); 4         if(!file.canRead()) { 5             new AlertDialog.Builder(this).setTitle("提示").setMessage("权限不足").setPositiveButton(android.R.string.ok, new OnClickListener() { 6                  7                 @Override 8                 public void onClick (DialogInterface dialog, int which) { 9                     10                 }11             }).show();12         } else if(file.isDirectory()) {13             initData(file);14         } else {15             openFile(file);16         }17     }

 

如果这个文件不能读，就弹出对话框显示“权限不足”。

如果是一个文件夹，就在调用一次显示所有文件的方法：initData(file);把这个文件夹作为参数传递下去。

如果是一个文件，就可以调用打开文件的方法打开这个文件。

如何打开文件呢？

可以根据不同的文件的后缀名找到不同的文件类型：

可以用一个二维数组把一些常用的文件类型封装起来。如下：

 1  private final String[][] MIME_MapTable = { 2         // {后缀名， MIME类型} 3         { ".3gp", "video/3gpp" },  4         { ".apk", "application/vnd.android.package-archive" },  5         { ".asf", "video/x-ms-asf" },  6         { ".avi", "video/x-msvideo" }, 7         { ".bin", "application/octet-stream" },  8         { ".bmp", "image/bmp" },  9         { ".c", "text/plain" }, 10         { ".class", "application/octet-stream" },11         { ".conf", "text/plain" }, 12         { ".cpp", "text/plain" }, 13         { ".doc", "application/msword" },14         { ".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document" }, 15         { ".xls", "application/vnd.ms-excel" },16         { ".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" }, 17         { ".exe", "application/octet-stream" },18         { ".gif", "image/gif" }, 19         { ".gtar", "application/x-gtar" }, 20         { ".gz", "application/x-gzip" }, 21         { ".h", "text/plain" }, 22         { ".htm", "text/html" },23         { ".html", "text/html" }, 24         { ".jar", "application/java-archive" }, 25         { ".java", "text/plain" }, 26         { ".jpeg", "image/jpeg" },27         { ".jpg", "image/jpeg" }, 28         { ".js", "application/x-javascript" }, 29         { ".log", "text/plain" }, 30         { ".m3u", "audio/x-mpegurl" },31         { ".m4a", "audio/mp4a-latm" }, 32         { ".m4b", "audio/mp4a-latm" }, 33         { ".m4p", "audio/mp4a-latm" }, 34         { ".m4u", "video/vnd.mpegurl" },35         { ".m4v", "video/x-m4v" }, 36         { ".mov", "video/quicktime" }, 37         { ".mp2", "audio/x-mpeg" }, 38         { ".mp3", "audio/x-mpeg" }, 39         { ".mp4", "video/mp4" },40         { ".mpc", "application/vnd.mpohun.certificate" }, 41         { ".mpe", "video/mpeg" }, 42         { ".mpeg", "video/mpeg" }, 43         { ".mpg", "video/mpeg" },44         { ".mpg4", "video/mp4" }, 45         { ".mpga", "audio/mpeg" }, 46         { ".msg", "application/vnd.ms-outlook" }, 47         { ".ogg", "audio/ogg" },48         { ".pdf", "application/pdf" }, 49         { ".png", "image/png" }, 50         { ".pps", "application/vnd.ms-powerpoint" },51         { ".ppt", "application/vnd.ms-powerpoint" }, 52         { ".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation" },53         { ".prop", "text/plain" }, 54         { ".rc", "text/plain" }, 55         { ".rmvb", "audio/x-pn-realaudio" }, 56         { ".rtf", "application/rtf" },57         { ".sh", "text/plain" }, 58         { ".tar", "application/x-tar" }, 59         { ".tgz", "application/x-compressed" }, 60         { ".txt", "text/plain" },61         { ".wav", "audio/x-wav" }, 62         { ".wma", "audio/x-ms-wma" }, 63         { ".wmv", "audio/x-ms-wmv" }, 64         { ".wps", "application/vnd.ms-works" },65         { ".xml", "text/plain" }, 66         { ".z", "application/x-compress" }, 67         { ".zip", "application/x-zip-compressed" }, 68         { "", "*/*" } 69         };

 

分别对应的是后缀名和对应的文件类型。

我们可以根据文件的后缀名拿到文件的MIMEType类型：

 1 private String getMIMEType(File file) { 2         String type = "*/*"; 3         String fileName = file.getName(); 4         int dotIndex = fileName.indexOf('.'); 5         if(dotIndex < 0) { 6             return type; 7         } 8         String end = fileName.substring(dotIndex, fileName.length()).toLowerCase(); 9         if(end == "") {10             return type;11         }12         for(int i=0; i<MIME_MapTable.length; i++) {13             if(end == MIME_MapTable[i][0]) {14                 type = MIME_MapTable[i][1] ;15             }16         }17         return type;18     }

 

先遍历后缀名，如果找到，就把对应的类型找到并返回。

拿到了类型，就可以打开这个文件。

用这个intent.setDataAndType(Uri.fromFile(file), type); 打开设置打开文件的类型。

如果type是*/*会弹出所有的可供选择的应用程序。

 

到这里一个简易的文件管理器就成型了。。。

源代码：

  1 package com.android.test;  2   3 import java.io.DataOutputStream;  4 import java.io.File;  5 import java.text.DecimalFormat;  6 import java.text.SimpleDateFormat;  7 import java.util.ArrayList;  8   9 import android.app.Activity; 10 import android.app.AlertDialog; 11 import android.content.Context; 12 import android.content.DialogInterface; 13 import android.content.Intent; 14 import android.content.DialogInterface.OnClickListener; 15 import android.graphics.Color; 16 import android.net.Uri; 17 import android.os.Bundle; 18 import android.view.LayoutInflater; 19 import android.view.View; 20 import android.view.ViewGroup; 21 import android.widget.AdapterView; 22 import android.widget.AdapterView.OnItemClickListener; 23 import android.widget.BaseAdapter; 24 import android.widget.ListView; 25 import android.widget.TextView; 26 import android.widget.Toast; 27  28 public class FileManager extends Activity implements OnItemClickListener { 29      30     private ListView mListView; 31     private TextView mPathView; 32     private FileListAdapter mFileAdpter; 33     private TextView mItemCount; 34      35     @Override 36     protected void onCreate (Bundle savedInstanceState) { 37         super.onCreate(savedInstanceState); 38         setContentView(R.layout.file_manager); 39         initView(); 40     } 41      42     private void initView() { 43         mListView = (ListView) findViewById(R.id.file_list); 44         mPathView = (TextView) findViewById(R.id.path); 45         mItemCount = (TextView) findViewById(R.id.item_count); 46         mListView.setOnItemClickListener(this); 47         String apkRoot = "chmod 777 " + getPackageCodePath();  48         RootCommand(apkRoot); 49         File folder = new File("/"); 50         initData(folder); 51     } 52      53     public static boolean RootCommand (String command) { 54         Process process = null; 55         DataOutputStream os = null; 56         try { 57             process = Runtime.getRuntime().exec("su"); 58             os = new DataOutputStream(process.getOutputStream()); 59             os.writeBytes(command + "\n"); 60             os.writeBytes("exit\n"); 61             os.flush(); 62             process.waitFor(); 63         } 64         catch (Exception e) { 65             return false; 66         } 67         finally { 68             try { 69                 if (os != null) { 70                     os.close(); 71                 } 72                 process.destroy(); 73             } 74             catch (Exception e) { 75                 e.printStackTrace(); 76             } 77         } 78         return true; 79     } 80      81     private void initData(File folder) { 82         boolean isRoot = folder.getParent() == null;  83         mPathView.setText(folder.getAbsolutePath());   84         ArrayList<File> files = new ArrayList<File>();    85         if (!isRoot) { 86             files.add(folder.getParentFile());   87         } 88         File[] filterFiles = folder.listFiles();   89         mItemCount.setText(filterFiles.length + "项");  90         if (null != filterFiles && filterFiles.length > 0) { 91             for (File file : filterFiles) { 92                 files.add(file); 93             } 94         } 95         mFileAdpter = new FileListAdapter(this, files, isRoot);   96         mListView.setAdapter(mFileAdpter); 97     } 98      99     private class FileListAdapter extends BaseAdapter {100 101         private Context context;102         private ArrayList<File> files;103         private boolean isRoot;104         private LayoutInflater mInflater;105         106         public FileListAdapter (Context context, ArrayList<File> files, boolean isRoot) {107             this.context = context;108             this.files = files;109             this.isRoot = isRoot;110             mInflater = LayoutInflater.from(context);111         }112         113         @Override114         public int getCount () {115             return files.size();116         }117 118         @Override119         public Object getItem (int position) {120             return files.get(position);121         }122 123         @Override124         public long getItemId (int position) {125             return position;126         }127         128         @Override129         public View getView (int position, View convertView, ViewGroup parent) {130             ViewHolder viewHolder;131             if(convertView == null) {132                 viewHolder = new ViewHolder();133                 convertView = mInflater.inflate(R.layout.file_list_item, null);134                 convertView.setTag(viewHolder);135                 viewHolder.title = (TextView) convertView.findViewById(R.id.file_title);136                 viewHolder.type = (TextView) convertView.findViewById(R.id.file_type);137                 viewHolder.data = (TextView) convertView.findViewById(R.id.file_date);138                 viewHolder.size = (TextView) convertView.findViewById(R.id.file_size);139             } else {140                 viewHolder = (ViewHolder) convertView.getTag();141             }142             143             File file = (File) getItem(position);144             if(position == 0 && !isRoot) {145                 viewHolder.title.setText("返回上一级");146                 viewHolder.data.setVisibility(View.GONE);147                 viewHolder.size.setVisibility(View.GONE);148                 viewHolder.type.setVisibility(View.GONE);149             } else {150                 String fileName = file.getName();151                 viewHolder.title.setText(fileName);152                 if(file.isDirectory()) {153                     viewHolder.size.setText("文件夹");154                     viewHolder.size.setTextColor(Color.RED);155                     viewHolder.type.setVisibility(View.GONE);156                     viewHolder.data.setVisibility(View.GONE);157                 } else {158                     long fileSize = file.length();159                     if(fileSize > 1024*1024) {160                         float size = fileSize /(1024f*1024f);161                         viewHolder.size.setText(new DecimalFormat("#.00").format(size) + "MB");162                     } else if(fileSize >= 1024) {163                         float size = fileSize/1024;164                         viewHolder.size.setText(new DecimalFormat("#.00").format(size) + "KB");165                     } else {166                         viewHolder.size.setText(fileSize + "B");167                     }168                     int dot = fileName.indexOf('.');169                     if(dot > -1 && dot < (fileName.length() -1)) {170                         viewHolder.type.setText(fileName.substring(dot + 1) + "文件");171                     }172                     viewHolder.data.setText(new SimpleDateFormat("yyyy/MM/dd HH:mm").format(file.lastModified()));173                 }174             }175             return convertView;176         }177         178         class ViewHolder {179             private TextView title;180             private TextView type;181             private TextView data;182             private TextView size;183         }184     }185 186     @Override187     public void onItemClick (AdapterView<?> parent, View view, int position, long id) {188         File file = (File) mFileAdpter.getItem(position);189         if(!file.canRead()) {190             new AlertDialog.Builder(this).setTitle("提示").setMessage("权限不足").setPositiveButton(android.R.string.ok, new OnClickListener() {191                 192                 @Override193                 public void onClick (DialogInterface dialog, int which) {194                     195                 }196             }).show();197         } else if(file.isDirectory()) {198             initData(file);199         } else {200             openFile(file);201         }202     }203     204     private void openFile(File file) {205         Intent intent = new Intent();206         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  207         intent.setAction(Intent.ACTION_VIEW);  208         String type = getMIMEType(file);  209         intent.setDataAndType(Uri.fromFile(file), type);  210         try {211             startActivity(intent);212         }213         catch (Exception e) {214             Toast.makeText(this, "未知类型，不能打开", Toast.LENGTH_SHORT).show();215         }216     }217     218     private String getMIMEType(File file) {219         String type = "*/*";220         String fileName = file.getName();221         int dotIndex = fileName.indexOf('.');222         if(dotIndex < 0) {223             return type;224         }225         String end = fileName.substring(dotIndex, fileName.length()).toLowerCase();226         if(end == "") {227             return type;228         }229         for(int i=0; i<MIME_MapTable.length; i++) {230             if(end == MIME_MapTable[i][0]) {231                 type = MIME_MapTable[i][1] ;232             }233         }234         return type;235     }236     237     private final String[][] MIME_MapTable = {238         // {后缀名， MIME类型}239         { ".3gp", "video/3gpp" }, 240         { ".apk", "application/vnd.android.package-archive" }, 241         { ".asf", "video/x-ms-asf" }, 242         { ".avi", "video/x-msvideo" },243         { ".bin", "application/octet-stream" }, 244         { ".bmp", "image/bmp" }, 245         { ".c", "text/plain" }, 246         { ".class", "application/octet-stream" },247         { ".conf", "text/plain" }, 248         { ".cpp", "text/plain" }, 249         { ".doc", "application/msword" },250         { ".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document" }, 251         { ".xls", "application/vnd.ms-excel" },252         { ".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" }, 253         { ".exe", "application/octet-stream" },254         { ".gif", "image/gif" }, 255         { ".gtar", "application/x-gtar" }, 256         { ".gz", "application/x-gzip" }, 257         { ".h", "text/plain" }, 258         { ".htm", "text/html" },259         { ".html", "text/html" }, 260         { ".jar", "application/java-archive" }, 261         { ".java", "text/plain" }, 262         { ".jpeg", "image/jpeg" },263         { ".jpg", "image/jpeg" }, 264         { ".js", "application/x-javascript" }, 265         { ".log", "text/plain" }, 266         { ".m3u", "audio/x-mpegurl" },267         { ".m4a", "audio/mp4a-latm" }, 268         { ".m4b", "audio/mp4a-latm" }, 269         { ".m4p", "audio/mp4a-latm" }, 270         { ".m4u", "video/vnd.mpegurl" },271         { ".m4v", "video/x-m4v" }, 272         { ".mov", "video/quicktime" }, 273         { ".mp2", "audio/x-mpeg" }, 274         { ".mp3", "audio/x-mpeg" }, 275         { ".mp4", "video/mp4" },276         { ".mpc", "application/vnd.mpohun.certificate" }, 277         { ".mpe", "video/mpeg" }, 278         { ".mpeg", "video/mpeg" }, 279         { ".mpg", "video/mpeg" },280         { ".mpg4", "video/mp4" }, 281         { ".mpga", "audio/mpeg" }, 282         { ".msg", "application/vnd.ms-outlook" }, 283         { ".ogg", "audio/ogg" },284         { ".pdf", "application/pdf" }, 285         { ".png", "image/png" }, 286         { ".pps", "application/vnd.ms-powerpoint" },287         { ".ppt", "application/vnd.ms-powerpoint" }, 288         { ".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation" },289         { ".prop", "text/plain" }, 290         { ".rc", "text/plain" }, 291         { ".rmvb", "audio/x-pn-realaudio" }, 292         { ".rtf", "application/rtf" },293         { ".sh", "text/plain" }, 294         { ".tar", "application/x-tar" }, 295         { ".tgz", "application/x-compressed" }, 296         { ".txt", "text/plain" },297         { ".wav", "audio/x-wav" }, 298         { ".wma", "audio/x-ms-wma" }, 299         { ".wmv", "audio/x-ms-wmv" }, 300         { ".wps", "application/vnd.ms-works" },301         { ".xml", "text/plain" }, 302         { ".z", "application/x-compress" }, 303         { ".zip", "application/x-zip-compressed" }, 304         { "", "*/*" } 305         };306 }

  最后补充一下，布局文件中的dimension是编译到jar包里面去了的，没有jar包的童鞋可以改成自己定义大小。。