Android Introduction File system operation (a) Simple file browser

Android Introduction File system operation (a) Simple file browser (GO)

1.ImportJava.io.File; 2.ImportJava.util.*; 3. 4.Importandroid.app.Activity; 5.ImportAndroid.content.Context; 6.Importandroid.os.*; 7.Importandroid.view.*; 8.Importandroid.widget.*; 9.ImportAndroid.widget.AdapterView.OnItemClickListener; 10.ImportAndroid.widget.ImageView.ScaleType; 11. 12. Public classFileBrowserextendsActivity {13. 14.PrivateListView mainlistview=NULL; 15.PrivateList<map<string,object>> list=NULL; 16. 17. Public voidonCreate (Bundle savedinstancestate) {18.Super. OnCreate (savedinstancestate); 19. This. settitle ("File Browser"); mainlistview=.NewListView ( This); 21st. Setcontentview (Mainlistview); 22. . File file=environment.getrootdirectory (); . String pathx=File.getabsolutepath (); 25. This. Settitle (PATHX); 26.//The total Android directory is "/"List_init ("/"); 28. } 29. 30.voidlist_init (String path) {. File file=NewFile (path); File[] Filelist=File.listfiles (); List=.NewArraylist<map<string,object>>(); Map<string,object>.item; Item=.NewHashmap<string,object>(); 36.if(Path.equals ("/")){   Panax Notoginseng item.put ("ico"), R.drawable.home); Item.put ("name", "Total directory List"); Item.put ("Path", "/"); 40. List.add (item); 41.}Else{   Item.put ("ico"), R.drawable.back); Item.put ("name", "Return to previous level"); Item.put ("path"), File.getparent ()); 45. List.add (item); 46. } 47. for(inti=0;i<filelist.length;i++){   Item=.NewHashmap<string,object>(); 49.if(Filelist[i].isdirectory ()) {50.if(Filelist[i].list (). length<1){   Wuyi item.put ("ico"), R.drawable.file1); 52.}Else{   Item.put ("ico"), R.drawable.file2); 54. } 55.}Else{   Item.put ("ico"), r.drawable.content); 57. } Item.put ("name", Filelist[i].getname ()); Item.put ("path"), Filelist[i].getabsolutepath ()); 60. List.add (item); 61. } Myadapter ma=NewMyadapter ( This, list); 63.//mainlistview=new ListView (this);64. Mainlistview.setadapter (MA); Mainlistview.setonitemclicklistener (NewOnitemclicklistener () {66. Public voidOnitemclick (adapterview<?> arg0, View arg1,intArg2,LongArg3) {   67.if(Arg2>0 && (Integer) (List.get (arg2). Get ("ico")) = =r.drawable.content) {   68.//Non-folder icon, click Invalid69.}Else{   70.//Open the next Level file directory listList_init (String) (List.get (arg2). Get ("path"))); 72. } 73. } 74. }); 75. This. Settitle (path); 76. } 77. 78. Public classMyadapterextendsbaseadapter{79. Context context=NULL; Bayi. list<map<string,object>> list=NULL; 82. Myadapter (Context context,list<map<string,object>>list) {   84. This. context=context; 85. This. list=list; 86. } 87. Public intGetCount () {returnlist.size ();} 88. PublicObject GetItem (intPosition) {returnposition;} 89. Public LongGetitemid (intPosition) {returnposition;} 90. 91. PublicView GetView (intposition, View Convertview, ViewGroup parent) {   LinearLayout returnview=.Newlinearlayout (context); Returnview.setlayoutparams (NewListview.layoutparams ( -1,-2));//Note: Listview.layoutparams94.//iconsImageView iv=NewImageView (context); Linearlayout.layoutparams lp_iv=NewLinearlayout.layoutparams ( -2,-2); lp_iv.rightmargin=10.; 98. Iv.setlayoutparams (LP_IV); 99. Iv.setscaletype (Scaletype.center_inside); Iv.setimageresource ((Integer) ((List.get (position)). Get ("ico")))); 101. Returnview.addview (iv); 102.//file name103. TextView Name=NewTextView (context); 104. Linearlayout.layoutparams lp_tv=NewLinearlayout.layoutparams ( -2,-2); 105. Name.setlayoutparams (LP_TV); 106. Name.settextsize (Name.gettextsize () +10); 107. Name.settext (String) (List.get (position). Get ("name"))); 108. Returnview.addview (name); 109.//110.returnReturnview; 111. } 112. 113. } 114.}

Android Introduction File system operation (a) Simple file browser (GO)