弹出列表框选择目录返回路径

package com.debby; import java.io.File; import java.util.List; import com.debby.R; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; public class MyAdapter extends BaseAdapter { private LayoutInflater mInflater; private Bitmap mIcon1; private Bitmap mIcon2; private Bitmap mIcon3; private Bitmap mIcon4; private List<String> items; private List<String> paths; public MyAdapter(Context context,List<String> it,List<String> pa) { mInflater = LayoutInflater.from(context); items = it; paths = pa; mIcon1 = BitmapFactory.decodeResource(context.getResources(),R.drawable.back01); mIcon2 = BitmapFactory.decodeResource(context.getResources(),R.drawable.back02); mIcon3 = BitmapFactory.decodeResource(context.getResources(),R.drawable.folder); mIcon4 = BitmapFactory.decodeResource(context.getResources(),R.drawable.doc); } public int getCount() { return items.size(); } public Object getItem(int position) { return items.get(position); } public long getItemId(int position) { return position; } public View getView(int position,View convertView,ViewGroup parent) { ViewHolder holder; if(convertView == null) { convertView = mInflater.inflate(R.layout.file_row, null); holder = new ViewHolder(); holder.text = (TextView) convertView.findViewById(R.id.text); holder.icon = (ImageView) convertView.findViewById(R.id.icon); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } File f=new File(paths.get(position).toString()); if(items.get(position).toString().equals("b1")) { holder.text.setText("返回根目录.."); holder.icon.setImageBitmap(mIcon1); } else if(items.get(position).toString().equals("b2")) { holder.text.setText("返回上一层.."); holder.icon.setImageBitmap(mIcon2); } else { holder.text.setText(f.getName()); if(f.isDirectory()) { holder.icon.setImageBitmap(mIcon3); } else { holder.icon.setImageBitmap(mIcon4); } } return convertView; } private class ViewHolder { TextView text; ImageView icon; } }