He creado lo FolderLayoutque puede ayudarte. Este enlace me ayudó
folderview.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView android:id="@+id/path" android:text="Path"
android:layout_width="match_parent" android:layout_height="wrap_content"></TextView>
<ListView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="@+id/list"></ListView>
</LinearLayout>
FolderLayout.java
package com.testsample.activity;
public class FolderLayout extends LinearLayout implements OnItemClickListener {
Context context;
IFolderItemListener folderListener;
private List<String> item = null;
private List<String> path = null;
private String root = "/";
private TextView myPath;
private ListView lstView;
public FolderLayout(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
this.context = context;
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.folderview, this);
myPath = (TextView) findViewById(R.id.path);
lstView = (ListView) findViewById(R.id.list);
Log.i("FolderView", "Constructed");
getDir(root, lstView);
}
public void setIFolderItemListener(IFolderItemListener folderItemListener) {
this.folderListener = folderItemListener;
}
//Set Directory for view at anytime
public void setDir(String dirPath){
getDir(dirPath, lstView);
}
private void getDir(String dirPath, ListView v) {
myPath.setText("Location: " + dirPath);
item = new ArrayList<String>();
path = new ArrayList<String>();
File f = new File(dirPath);
File[] files = f.listFiles();
if (!dirPath.equals(root)) {
item.add(root);
path.add(root);
item.add("../");
path.add(f.getParent());
}
for (int i = 0; i < files.length; i++) {
File file = files[i];
path.add(file.getPath());
if (file.isDirectory())
item.add(file.getName() + "/");
else
item.add(file.getName());
}
Log.i("Folders", files.length + "");
setItemList(item);
}
//can manually set Item to display, if u want
public void setItemList(List<String> item){
ArrayAdapter<String> fileList = new ArrayAdapter<String>(context,
R.layout.row, item);
lstView.setAdapter(fileList);
lstView.setOnItemClickListener(this);
}
public void onListItemClick(ListView l, View v, int position, long id) {
File file = new File(path.get(position));
if (file.isDirectory()) {
if (file.canRead())
getDir(path.get(position), l);
else {
//what to do when folder is unreadable
if (folderListener != null) {
folderListener.OnCannotFileRead(file);
}
}
} else {
//what to do when file is clicked
//You can add more,like checking extension,and performing separate actions
if (folderListener != null) {
folderListener.OnFileClicked(file);
}
}
}
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
onListItemClick((ListView) arg0, arg0, arg2, arg3);
}
}
Y una interfaz IFolderItemListenerpara agregar qué hacer cuando fileItemse hace clic en un
IFolderItemListener.java
public interface IFolderItemListener {
void OnCannotFileRead(File file);//implement what to do folder is Unreadable
void OnFileClicked(File file);//What to do When a file is clicked
}
También un xml para definir la fila
row.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/rowtext" android:layout_width="fill_parent"
android:textSize="23sp" android:layout_height="match_parent"/>
Cómo usar en su aplicación
En tu xml,
folder.xml
<?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="horizontal" android:weightSum="1">
<com.testsample.activity.FolderLayout android:layout_height="match_parent" layout="@layout/folderview"
android:layout_weight="0.35"
android:layout_width="200dp" android:id="@+id/localfolders"></com.testsample.activity.FolderLayout></LinearLayout>
En su actividad,
SampleFolderActivity.java
public class SampleFolderActivity extends Activity implements IFolderItemListener {
FolderLayout localFolders;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
localFolders = (FolderLayout)findViewById(R.id.localfolders);
localFolders.setIFolderItemListener(this);
localFolders.setDir("./sys");//change directory if u want,default is root
}
//Your stuff here for Cannot open Folder
public void OnCannotFileRead(File file) {
// TODO Auto-generated method stub
new AlertDialog.Builder(this)
.setIcon(R.drawable.icon)
.setTitle(
"[" + file.getName()
+ "] folder can't be read!")
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
}
//Your stuff here for file Click
public void OnFileClicked(File file) {
// TODO Auto-generated method stub
new AlertDialog.Builder(this)
.setIcon(R.drawable.icon)
.setTitle("[" + file.getName() + "]")
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
}
}
Importar las bibliotecas necesarias. Espero que esto te ayude ...