Android-simple sdcard file browsing, android-sdcard

Android-simple sdcard file browsing, android-sdcard

Function: allows you to browse the folders and files on your mobile phone. The code is usually too simple.

 

First view Layout

<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android: layout_width = "match_parent" android: layout_height = "match_parent" android: orientation = "vertical" tools: context = "com. example. fanlei. myservicedemo. filePathActivity "> <android. support. v7.widget. toolbar android: layout_width = "match_parent" android: layout_height = "? Attr/actionBarSize "android: background =" #000 "> <Button android: id =" @ + id/button "android: layout_width =" wrap_content "android: layout_height = "match_parent" android: text = "back to upper-level"/> </android. support. v7.widget. toolbar> <ListView android: id = "@ + id/listView" android: layout_width = "match_parent" android: layout_height = "match_parent"> </ListView> </LinearLayout>

Main Function

1 package com. example. fanlei. myservicedemo; 2 3 import android. annotation. targetApi; 4 import android. OS. build; 5 import android. OS. bundle; 6 import android. OS. environment; 7 import android. support. v7.app. actionBarActivity; 8 import android. view. view; 9 import android. widget. adapterView; 10 import android. widget. arrayAdapter; 11 import android. widget. button; 12 import android. widget. listView; 13 im Port android. widget. toast; 14 import java. io. file; 15 import java. util. arrayList; 16 import java. util. list; 17 18 public class FilePathActivity extends ActionBarActivity {19 20 21 private ListView; 22 private File currentParent; // record parent folder 23 private File [] currentFiles; // record the array of all files in the current path 24 private List <String> fileName; // file or folder name 25 26 private ArrayAdapter arrayAdapter; 27 private Butt On button; 28 29 @ TargetApi (Build. VERSION_CODES.KITKAT) 30 @ Override 31 protected void onCreate (Bundle savedInstanceState) {32 super. onCreate (savedInstanceState); 33 setContentView (R. layout. activity_file_path); 34 35 // determine whether there is a wood with sdcard card 36 if (Environment. getExternalStorageState (). equals (Environment. MEDIA_MOUNTED) {37 initView (); 38 initData (); 39 initEvent (); 40} else {41 Toast. makeText (this, "No sd Card ", Toast. LENGTH_LONG ). show (); 42} 43 44} 45 46 private void initView () {47 listView = (ListView) findViewById (R. id. listView); 48 button = (Button) findViewById (R. id. button); 49} 50 51 private void initData () {52 currentParent = Environment. getExternalStorageDirectory (); 53 currentFiles = currentParent. listFiles (); 54 fileName = new ArrayList <> (); 55 List <String> temp = filesToFileName (curre NtFiles); 56 fileName. addAll (temp); 57 arrayAdapter = new ArrayAdapter (this, android. r. layout. simple_list_item_1, fileName); 58 listView. setAdapter (arrayAdapter); 59} 60 61 private void initEvent () {62 listView. setOnItemClickListener (new AdapterView. onItemClickListener () {63 @ Override 64 public void onItemClick (AdapterView <?> Parent, View view, int position, long id) {65 if (! CurrentFiles [position]. isFile () {66 File [] temp = currentFiles [position]. listFiles (); 67 if (temp = null | temp. length = 0) {68 Toast. makeText (FilePathActivity. this, "No file under this file", Toast. LENGTH_LONG ). show (); 69} else {70 currentParent = currentFiles [position]; 71 currentFiles = temp; 72 fileName. clear (); 73 fileName. addAll (filesToFileName (currentFiles); 74 arrayAdapter. notifyDataSetChanged (); 75} 76} 77} 78}); 79 // return key 80 button. setOnClickListener (new View. OnClickListener () {81 @ Override 82 public void onClick (View v) {83 if (! CurrentParent. getPath (). equals (Environment. getExternalStorageDirectory (). getPath () {84 currentParent = currentParent. getParentFile (); 85 currentFiles = currentParent. listFiles (); 86 fileName. clear (); 87 fileName. addAll (filesToFileName (currentFiles); 88 arrayAdapter. notifyDataSetChanged (); 89} 90} 91}); 92} 93 // returns an array 94 private List of File names <String> filesToFileName (File [] files) {95 List <St Ring> fileName = new ArrayList <> (); 96 for (int I = 0; I <files. length; I ++) {97 if (! Files [I]. getName (). substring (0, 1 ). equals (". ") {// here I put". "does not display 98 fileName. add (files [I]. getName (); 99} 100} 101 return fileName; 102} 103}