1.main.xml界面设计,如下图
代码如下:
main.xml
2.item.xml界面设计,如下图
代码如下:
item.xml
效果图main.xml
效果图item.xml
3.File_Adter类的实现
代码如下:
package com.cqvie;
import java.io.File;
import java.util.LinkedList;
import java.util.List;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class File_Adter extends BaseAdapter {
public Activity activity; //创建View时必须要提供Context
public List list=new LinkedList(); //数据源（文件列表）
public String currPath;//当前路径
private Bitmap bmp_folder,bmp_file;
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(int position, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
View v=View.inflate(activity,R.layout.item,null);
TextView Txt_Name=(TextView) v.findViewById(R.id.Txt_Name);
TextView Txt_Size=(TextView) v.findViewById(R.id.Txt_Size);
ImageView img=(ImageView) v.findViewById(R.id.image_ico);
File f=list.get(position);
Txt_Name.setText(f.getName());
Txt_Size.setText(getFilesSize(f));
if(f.isDirectory())
img.setImageBitmap(bmp_folder);
else
img.setImageBitmap(bmp_file);
return v;
}
public void scanFiles(String path)
{
list.clear();
File dir=new File(path);
File[] subFiles=dir.listFiles();
if(subFiles!=null)
for(File f:subFiles)
list.add(f);
this.notifyDataSetChanged();
currPath=path;
}
public File_Adter(Activity activity)
{
this.activity=activity;
bmp_folder=BitmapFactory.decodeResource(activity.getResources(),R.drawable.folder);//文件夹,decodeResource图片解码，source资源，解码为Bitmap类型；
bmp_file=BitmapFactory.decodeResource(activity.getResources(),R.drawable.file);//文件
}
public static String getFilesSize(File f)
{
int sub_index=0;
String show="";
if(f.isFile())
{
long length=f.length();
if(length>=1073741824)
{
sub_index=String.valueOf((float)length/1073741824).indexOf(".");
show=((float)length/1073741824+"000").substring(0,sub_index+3)+"GB";
}
else if(length>=1048576)
{
sub_index=(String.valueOf((float)length/1048576)).indexOf(".");
show=((float)length/1048576+"000").substring(0,sub_index+3)+"GB";
}
else if(length>=1024)
{
sub_index=(String.valueOf((float)length/1024)).indexOf(".");
show=((float)length/1024+"000").substring(0,sub_index+3)+"GB";
}
else if(length