I'm doing an aplication for Android and something I need is that it shows a list of all files and directories in the SD Card and it has to be able to move through the different directories. I found a good tutorial in anddev: http://bit.ly/h4GyFC I modified a few things so the aplication moves in the SD Card and not in Android root Directories but the rest is mostly the same.

This is my xml file for the activity:

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

And this is the code for the Activity:

    import hackreatorz.cifrador.R;

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

import android.app.ListActivity;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class ArchivosSD extends ListActivity {

    private ArrayList<String> directoryEntries = new ArrayList<String>();
    private File currentDirectory = new File("/sdcard/");

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        browseToSD();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

    private void browseToSD() {
        browseTo(new File("/sdcard/"));
    }

    private void upOneLevel() {
         if(this.currentDirectory.getParent() != null)
             this.browseTo(this.currentDirectory.getParentFile());
    }

    private void browseTo(final File directory) {
        if (directory.isDirectory()) {
                this.currentDirectory = directory;
                fill(directory.listFiles());
        } else {
                Toast.makeText(ArchivosSD.this, this.directoryEntries.get(this.getSelectedItemPosition()), Toast.LENGTH_SHORT).show();
                }
    }

    private void fill(File[] files) {
        this.directoryEntries.clear();
        this.directoryEntries.add(getString(R.string.current_dir));
        if(this.currentDirectory.getParent() != null)
            this.directoryEntries.add(getString(R.string.up_one_level));
            int currentPathStringLength = (int) this.currentDirectory.getAbsoluteFile().length();
            for (File file : files) {
                this.directoryEntries.add(file.getAbsolutePath().substring(currentPathStringLength));           
            }
        setListAdapter(new ArrayAdapter<String>(this, R.layout.archivos_sd, this.directoryEntries));
    }   

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        int selectionRowID = (int) this.getSelectedItemPosition();
        String selectedFileString = this.directoryEntries.get(selectionRowID);
        if (selectedFileString.equals(".")) {
            this.browseToSD();
        } else if(selectedFileString.equals("..")) {
            this.upOneLevel();
        } else {
            File clickedFile = null;
            clickedFile = new File(this.currentDirectory.getAbsolutePath() + this.directoryEntries.get(selectionRowID));
            if(clickedFile != null)
                this.browseTo(clickedFile);
            }
    }
}

I don't get any errores in Eclipse, but I get a Force Close when running the aplication on my phone and when I look at Logcat I see the following:

01-01 23:30:29.858: ERROR/AndroidRuntime(14911): FATAL EXCEPTION: main *01-01 23:30:29.858: ERROR/AndroidRuntime(14911): java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView*

I don't have a clue what to do, I've looked up in Google and I didn't find anything and I did the same at stackoverflow. This is my first aplication in Java and for Android so I'm a real n00b and if the answer was there, I didn't understand it so I would really apreciate if you could explain what I should do to fix this error and why.

Thanks for everything in advanced.