<?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" />

<?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" />

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.List;import android.app.ListActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ListView;public class TestGrid   extends ListActivity {private static final FileFilter IMAGES_FILTER = new FileFilter() {public boolean accept(File f) {return f.isDirectory() || f.getName().matches("^.*?\\.(jpg|png|bmp|gif)$");}};private FileListAdapter fileList;public void onCreate(Bundle icicle) {super.onCreate(icicle);setContentView(R.layout.directory_list);fill(new File("/"));}public boolean onKeyDown(int keyCode, KeyEvent event) {if (keyCode == KeyEvent.KEYCODE_BACK && !fileList.isRoot()) {fill(fileList.getItem(1));return true;}return super.onKeyDown(keyCode, event);}private void fill(File folder) {List<File> files = new ArrayList<File>();files.add(folder);if (folder.getParentFile() != null)files.add(folder.getParentFile());for (File file : folder.listFiles(IMAGES_FILTER)) {files.add(file);}fileList = new FileListAdapter(this, R.layout.file_row, files);setListAdapter(fileList);}@Overrideprotected void onListItemClick(ListView l, View v, int position, long id) {File file = fileList.getItem(position);if (file.isDirectory())fill(file);// TODO use image switcher to display selected images
 }
}

import java.io.File;
import java.util.List;import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;public class FileListAdapter extends ArrayAdapter<File>{public FileListAdapter(Context context, int Resource,List<File> objects) {super(context,Resource,objects);// TODO Auto-generated constructor stub
 }@Overridepublic View getView(int position, View convertView, ViewGroup parent) {TextView view = (TextView) super.getView(position, convertView, parent);File file = getItem(position);if (position == 0)view.setText(view.getResources().getString(R.string.current_folder) + file.getAbsolutePath());else if (position == 1 && !isRoot())view.setText(R.string.to_parent_folder);elseview.setText(file.getName());return view;}public boolean isRoot() {return getItem(0).getParent() == null;}}