Android File Manager

Recently I wrote a file management project called deamo, which mainly provides file browsing, file directory creation, file deletion, and rename functions,

:

The details are as follows;

Package COM. taskmanage. file; import Java. io. file; import Java. util. arraylist; import Java. util. hashmap; import Java. util. list; import Java. util. map; import android. app. activity; import android. app. alertdialog; import android. content. dialoginterface; import android. content. dialoginterface. onclicklistener; import android. content. intent; import android.net. uri; import android. OS. bundle; import android. text. textui Ls; import android. util. log; import android. view. contextmenu; import android. view. contextmenu. contextmenuinfo; import android. view. gesturedetector. ongesturelistener; import android. view. layoutinflater; import android. view. menu; import android. view. menuitem; import android. view. motionevent; import android. view. view; import android. widget. adapterview; import android. widget. adapterview. onitemclicklistener; impor T android. widget. adapterview. onitemlongclicklistener; import android. widget. edittext; import android. widget. listview; import android. widget. simpleadapter; import android. widget. toast; public class fileactivity extends activity implements onitemclicklistener, onitemlongclicklistener {private listview FileView; private string Path = "/sdcard"; // file path private list <Map <string, object> items; // content adapter private simp Leadapter adapter; // backup file parent directory private file backfile = NULL; // current file directory private string currentpath = "/sdcard"; // whether the file is successfully deleted private Boolean flag; @ overrideprotected void oncreate (bundle savedinstancestate) {setcontentview (R. layout. files); settitle ("File Manager"); FileView = (listview) findviewbyid (R. id. filelist); listdir (PATH); super. oncreate (savedinstancestate);}/*** dynamically bind the file information to the listview * @ Param path */private void listdi R (string path) {items = bindlist (PATH); // If (items! = NULL) {adapter = new simpleadapter (this, items, R. layout. file_row, new string [] {"name", "path", "IMG"}, new int [] {R. id. name, R. id. DESC, R. id. IMG}); FileView. setadapter (adapter); FileView. setonitemclicklistener (this); FileView. setonitemlongclicklistener (this); FileView. setselection (0); //}/*** returns information about all file directories * @ Param path * @ return */private list <Map <string, object> bindlist (string path) {file [] files = New file (PATH). listfiles (); // If (files! = NULL) {list <Map <string, Object> List = new arraylist <Map <string, Object> (files. length); Map <string, Object> root = new hashmap <string, Object> (); root. put ("name", "/sdcard"); root. put ("IMG", R. drawable. file_root); root. put ("path", "root directory"); list. add (Root); Map <string, Object> pmap = new hashmap <string, Object> (); pmap. put ("name", "back"); pmap. put ("IMG", R. drawable. file_paranet); pmap. put ("path ", "Paranet directory"); list. add (pmap); For (File file: Files) {Map <string, Object> map = new hashmap <string, Object> (); If (file. isdirectory () {map. put ("IMG", R. drawable. directory);} else {map. put ("IMG", R. drawable. file_doc);} map. put ("name", file. getname (); map. put ("path", file. getpath (); list. add (MAP);} return list;/*} return NULL; */} @ overridepublic void onitemclick (adapterview <?> Arg0, view arg1, int position, long arg3) {If (position = 0) {// return to the/sdcard directory path = "/sdcard"; listdir (PATH );} else if (position = 1) {// return the top-level directory toparent ();} else {If (items! = NULL) {Path = (string) items. get (position ). get ("path"); file = new file (PATH); If (file. canread () & file. canexecute () & file. isdirectory () {listdir (PATH);} else {openfile (File); toast. maketext (this, "No dir", toast. length_short ). show () ;}} backfile = new file (PATH);} private void toparent () {// return to the parent directory file = new file (PATH); file parent = file. getparentfile (); If (parent = NULL) {listdir (PATH);} else {Path = Parent. getabsolutepath (); listdir (PATH) ;}/ *** file operation prompt * @ Param ID */private void mydialog (int id) {alertdialog. builder = new alertdialog. builder (this); Switch (ID) {Case 0: layoutinflater factory = layoutinflater. from (this); final view textentryview = factory. inflate (R. layout. filedialog, null); builder. settitle ("create folder"); builder. setview (textentryview); builder. setpositivebutton ("OK", new created Ialog (textentryview); builder. setnegativebutton ("cancel", null); break; Case 1: layoutinflater factory2 = layoutinflater. from (this); final view textentryview2 = factory2.inflate (R. layout. filedialog, null); builder. settitle ("rename a file"); builder. setview (textentryview2); builder. setpositivebutton ("OK", new renamedialog (textentryview2); builder. setnegativebutton ("cancel", null); break; Case 2: builder. settitle ("You are sure Are you sure you want to delete it? "); Builder. setpositivebutton ("OK", new deletedialog (); builder. setnegativebutton ("cancel", null); break;} builder. create (). show ();}/*** delete a specified directory or file based on the path, whether it exists or not * @ Param Spath the directory or file to be deleted * @ return returns true if the deletion is successful, otherwise, false is returned. */Public Boolean deletefolder (string Spath) {flag = false; file = new file (Spath); // determine whether a directory or file exists if (! File. exists () {// returns false return flag;} else {// determines whether it is a file if (file. isfile () {// return deletefile (Spath );} when else {// is a directory, call the delete directory method return deletedirectory (Spath );}}} /*** delete a single file * @ Param Spath File Name of the deleted file * @ return true if the deletion of a single file is successful; otherwise, false */Public Boolean deletefile (string Spath) is returned) {flag = false; file = new file (Spath); // Delete if (file. isfile () & file. exists () {File. delete (); flag = true;} return flag;}/*** Delete directory (folder) and the file in the directory * @ Param Spath is the file path of the deleted directory * @ return returns true if the directory is deleted successfully; otherwise, false */Public Boolean deletedirectory (string Spath) is returned) {// If Spath does not end with a file separator, the file separator if (! Spath. endswith (file. separator) {Spath = Spath + file. separator;} file dirfile = new file (Spath); // exit if (! Dirfile. exists () |! Dirfile. isdirectory () {return false;} flag = true; // delete all files in the folder (including subdirectories) file [] files = dirfile. listfiles (); For (INT I = 0; I <files. length; I ++) {// Delete the sub-file if (files [I]. isfile () {flag = deletefile (files [I]. getabsolutepath (); If (! Flag) break;} // Delete the subdirectory else {flag = deletedirectory (files [I]. getabsolutepath (); If (! Flag) break;} If (! Flag) return false; // Delete the current directory if (dirfile. delete () {return true;} else {return false;}/*** file refresh * @ Param file */private void filescan (string file) {uri data = Uri. parse ("file: //" + files); sendbroadcast (new intent (intent. action_media_scanner_scan_file, data);}/*** start file open * @ Param f */private void openfile (file F) {intent = new intent (); intent. addflags (intent. flag_activity_new_tas K); intent. setaction (Android. content. intent. action_view); // obtain the file media type string type = getmimetype (f); If (type = NULL) return; intent. setdataandtype (URI. fromfile (F), type); startactivity (intent);}/*** get file type * @ Param f * @ return */private string getmimetype (file F) {string type = ""; string filename = f. getname (); string end = filename. substring (filename. indexof (". ") + 1 ). tolowercase (); // determines the file type If (end. equals ("WMA") | end. equals ("MP3") | end. equals ("Midi") | end. equals ("ape") | end. equals ("Amr") | end. equals ("Ogg") | end. equals ("WAV") | end. equals ("ACC") {type = "audio";} else if (end. equals ("3GP") | end. equals ("MP4") | end. equals ("rmvb") | end. equals ("FLV") | end. equals ("Avi") | end. equals ("WMV") | end. equals ("f4v") {type = "video";} else if (end. equals ("jpg") | end. equals ("GIF ") | End. equals ("PNG") | end. equals ("Jpeg") | end. equals ("BMP") {type = "image";} else {toast. maketext (getapplicationcontext (), "not media file", toast. length_long ). show (); return NULL;} // The Mime Type format is "file type/file extension" type + = "/*"; return type ;} @ overridepublic Boolean oncreateoptionsmenu (menu) {menu. add (0, menu. first, 0, "creat file"); menu. add (0, menu. first + 1, 0, "about other"); Return Su Per. oncreateoptionsmenu (menu) ;}@ overridepublic Boolean onoptionsitemselected (menuitem item) {Switch (item. getitemid () {Case 1: mydialog (0); break; Case 2: Toast. maketext (this, "All Rights Reserved. Piracy is required! ", 500). Show (); break;} return Super. onoptionsitemselected (item) ;}@ overridepublic Boolean onitemlongclick (adapterview <?> Arg0, view arg1, int arg2, long arg3) {alertdialog. builder = new alertdialog. builder (this); string [] items = {"RENAME file", "delete file"}; builder. setitems (items, new longdialog (arg2); builder. create (). show (); Return true;} class createdialog implements dialoginterface. onclicklistener {private view textentryview; Public createdialog (view textentryview) {This. textentryview = textentryview;} @ overridep Ublic void onclick (dialoginterface dialog, int which) {edittext username = (edittext) textentryview. findviewbyid (R. id. fname); string fn = username. gettext (). tostring (). trim (); If (! Textutils. isempty (FN) {file F = new file (backfile, FN); If (F. exists () {toast. maketext (fileactivity. this, "file has exist", 500 ). show ();} else {toast. maketext (fileactivity. this, "file creat" + F. mkdir (), 500 ). show (); listdir (F. getabsolutepath (); // filescan (F. getabsolutepath (); adapter. notifydatasetchanged () ;}}} class renamedialog implements dialoginterface. onclicklistener {private view textentryvie W2; Public renamedialog (view textentryview2) {This. textentryview2 = textentryview2;} @ overridepublic void onclick (dialoginterface dialog, int which) {edittext username = (edittext) textentryview2.findviewbyid (R. id. fname); string fn = username. gettext (). tostring (). trim (); If (! Textutils. isempty (FN) {file old = new file (currentpath); file F = new file (backfile. getabsolutepath (), FN); If (F. exists () {toast. maketext (fileactivity. this, "file has exist", 500 ). show ();} else {toast. maketext (fileactivity. this, "file rename" + Old. renameto (F), 500 ). show (); listdir (F. getabsolutepath (); // filescan (F. getabsolutepath (); adapter. notifydatasetchanged () ;}}} class deletedialog implements dialoginterface. onclicklistener {@ overridepublic void onclick (dialoginterface diich, int which) {file F = new file (currentpath); If (F. exists () {deletefolder (F. getabsolutepath (); listdir (F. getparent (); // filescan (F. getabsolutepath (); adapter. notifydatasetchanged ();} else toast. maketext (fileactivity. this, "file not exist", 500 ). show () ;}/ *** file operation select * @ author administrator **/class longdialog implements dialoginterface. onclicklistener {private int Pos = 0; Public longdiener (int pos) {This. pos = POS ;}@ overridepublic void onclick (dialoginterface diich, int which) {Switch (which) {Case 0: currentpath = (string) items. get (POS ). get ("path"); mydialog (1); break; Case 1: currentpath = (string) items. get (POS ). get ("path"); mydialog (2); break ;}}}}

Layout file files. XM file l:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><ListView     android:layout_width="fill_parent"android:layout_height="fill_parent" android:id="@+id/filelist" /></LinearLayout>

File_row.xml file:

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/vw1"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="horizontal">        <ImageView android:id="@+id/img"        android:layout_width="32dip"        android:layout_margin="4dip"        android:layout_height="32dip"/>    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="vertical">        <TextView android:id="@+id/name"            android:textSize="18sp"            android:textStyle="bold"            android:layout_width="fill_parent"            android:layout_height="wrap_content"/>        <TextView android:id="@+id/desc"            android:textSize="14sp"            android:layout_width="fill_parent"            android:paddingLeft="10dip"            android:layout_height="wrap_content"/>    </LinearLayout></LinearLayout>

By the way, do not forget to add permissions. If yes, an error may occur.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

The above operations are performed on the SD card and are not applicable to system file management.

You can also use the. jar package provided by a third party for file management-related operations.

For example, the fileutils class of Apache commons is a tool class that greatly simplifies file operations.

1. Download jar address: http://commons.apache.org/proper/commons-io/download_io.cgi
2. Import the commons-io-2.4.jar file to your project

Related Articles: http://snkcxy.iteye.com/blog/1845862

The Code is a little long and can be understood slowly. If there are any deficiencies, please point out. Make progress together and learn together!