Directory Browser Application

Here's a sample that allows you to browse the file system on your Android.  I found some sample code at http://www.linuxdevices.com/articles/AT6247038002.html and adapted it slightly.

Note that it extends ListActivity and the items in the list are are rendered using the layout file file_list_row.xml.

Here's the code...

Here's the main layout file (main.xml)...

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content">
        <ListView android:id="@android:id/list"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"/>
        <TextView android:id="@android:id/empty"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="@string/empty_dir"/>
</LinearLayout>

Here's the layout file for the items in the ListActivity (file_list_row.xml)...

<?xml version="1.0" encoding="utf-8"?>
<TextView android:id="@+id/text1"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

Here's the main activity...

package com.remwebdevelopment.android;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class DirectoryBrowser extends ListActivity {
   
    private List<String> items = null;
   
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        getFiles(new File("/").listFiles());
    }
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id){
        int selectedRow = (int)id;
        if(selectedRow == 0){
            getFiles(new File("/").listFiles());
        }else{
            File file = new File(items.get(selectedRow));
            if(file.isDirectory()){
                getFiles(file.listFiles());
            }else{
                 new AlertDialog.Builder(FileList.this)
                 .setTitle("This file is not a directory")
                 .setNeutralButton("OK", new DialogInterface.OnClickListener(){
                     public void onClick(DialogInterface dialog, int button){
                         //do nothing
                     }
                 })
                 .show();
            }
        }
    }
    private void getFiles(File[] files){
        items = new ArrayList<String>();
        items.add(getString(R.string.goto_root));
        for(File file : files){
            items.add(file.getPath());
        }
        ArrayAdapter<String> fileList = new ArrayAdapter<String>(this,R.layout.file_list_row, items);
        setListAdapter(fileList);
    }
}