Android reads files or folders under the root directory

1 @Override2  Public voidonCreate (Bundle savedinstancestate) {3    Super. OnCreate (savedinstancestate);4 Setcontentview (R.layout.main); 5EditText Keywordtext = (EditText) This. Findviewbyid (R.id.keyword);6Button button = (Button) This. Findviewbyid (R.id.button);7TextView result = (TextView) This. Findviewbyid (R.id.result);8Button.setonclicklistener (NewButton.onclicklistener () {9        Public voidOnClick (View v) {TenString keyword =Keywordtext.gettext (). toString (); One          if(Keyword.equals ("")) {  AResult.settext ("Do not enter a blank keyword!!"));  -}Else {  - result.settext (searchfile (keyword)); the          }  -      }  -   });  - } +  - Privatestring searchfile (string keyword) { +String result = "";  Afile[] Files =NewFile ("/"). Listfiles ();  at     for(File file:files) { -      if(Fike.getname (). INDEXOF (keyword) >= 0) {  -Result + = File.getpath () + "\ n";  -      }  -    }  -   if(Result.equals ("")){ inresult = "File not found!!";  -   } to  returnresult; +}

First, we need to use the File.listfiles () method to get the name of all the files or folders under the folder, where the path of the folder is "/", that is, the root directory. Then we get their relative paths through GetPath () one by one.

Examples of running results such as:

Android reads files or folders under the root directory