一个上传图片的功能，需要对SD中的图片上传：

file_row.xml

directory_list.xml

 

TestGrid.java

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
     
       files = new ArrayList
      
       ();  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); } @Override protected 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 }}
      
     

FileListAdapter.java

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
     
      { public FileListAdapter(Context context, int Resource,List
      
        objects) {  super(context,Resource,objects);  // TODO Auto-generated constructor stub }    @Override   public 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);     else       view.setText(file.getName());     return view;   }   public boolean isRoot() {     return getItem(0).getParent() == null;   } }