1、创建imageview对象
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2、设置imageview的图片
3、添加到布局中
示例代码
ViewGroup group = (ViewGroup) findViewById(R.id.viewGroup); //获取原来的布局容器
ImageView imageView = new ImageView(this); //创建imageview
imageView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT)); //image的布局方式
imageView.setImageResource(R.drawable.ic_launcher); //设置imageview呈现的图片
group.addView(imageView); //添加到布局容器中，显示图片。
我自己做过一个类似的电子相册，但功能很不够全面，给你参考下...
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class img4 extends Applet
{
static Button btn1,btn2,btn3,btn4,btn5;
public void init()
{
setBackground(Color.cyan);
setVisible(true);
setLayout(null);
img4cvs cvs=new img4cvs();
btn1=new Button("下一页");
btn2=new Button("上一页");
btn4=new Button("自动播放");
btn5=new Button("停止");
add(btn1);
add(btn2);
add(btn4);
add(btn5);
add(cvs);
btn2.setBounds(550,60,60,30);
btn1.setBounds(550,120,60,30);
btn4.setBounds(550,180,60,30);
btn5.setBounds(550,240,60,30);
cvs.setBounds(30,30,500,400);
btn1.addActionListener(cvs);
btn2.addActionListener(cvs);
btn4.addActionListener(cvs);
btn5.addActionListener(cvs);
validate();
}
class Backcolor extends Thread
{
public void run()
{int j=0;int m=0;int n=0;
while(true)
{
try{
if(j255m255n255)
{
j++;
sleep(100);
Color col1=new Color(j,m,n);
setBackground(col1); }
else if(j==255m255)
{
m++;
sleep(100);
Color col2=new Color(j,m,n);
setBackground(col2); }
else if(j==255m==255n255)
{
n++;
sleep(100);
Color col3=new Color(j,m,n);
setBackground(col3);}
else if(j==255m==255n==255)
{
j=55;
m=55;
n=55;
}
}
catch(InterruptedException e){}
}
}
}
public void start()
{
Backcolor thread2=new Backcolor();
thread2.start();
}
}
class img4cvs extends Canvas implements ActionListener
{
Image[] img;
int pg=0;
volatile boolean pleaseStop;
//String FONTS="Serif";
//String TEXT="我们很性感2！！";
img4cvs()
{
img=new Image[12];
Toolkit tl=getToolkit();
for(int i=0;i=11;i++)
{
img[i]=tl.getImage("img0"+i+".JPG");
}
}
class Play extends Thread
{
public void run()
{
while(!pleaseStop)
{
try{
pg++;
if(pg11){pg=0;}
sleep(1500);
}
catch(InterruptedException e){}
repaint();
}
}
}
public void actionPerformed(ActionEvent e)
{
Play thread=new Play();
if(e.getSource()==img4.btn1)
{
pg++;
if(pg11){pg=0;}
repaint();
}
else if(e.getSource()==img4.btn2)
{
pg--;
if(pg0){pg=11;}
repaint();
}
else if(e.getSource()==img4.btn4)
{
pleaseStop=false;
thread.start();
}
else if(e.getSource()==img4.btn5)
{
pleaseStop=true;
}
}
public void paint(Graphics g)
{
/*g.setColor(Color.black);
g.setFont(new Font(FONTS,Font.BOLD+Font.ITALIC,20));
g.drawString(TEXT,0,500);*/
g.drawImage(img[pg],0,0,500,400,this);
}
}
/*
applet code="img4.class" width=650 height=500
/applet
*/
页面:
%@ Page language="c#" Codebehind="filesystem.aspx.cs" AutoEventWireup="false" Inherits="WebShop.filesystem" %
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
HTML
HEAD
titlefilesystem/title
meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR"
meta content="C#" name="CODE_LANGUAGE"
meta content="JavaScript" name="vs_defaultClientScript"
meta content="" name="vs_targetSchema"
LINK href="CssStyle.css" type="text/css" rel="stylesheet"
form id="Form1" method="post" runat="server"
/HEAD
body MS_POSITIONING="GridLayout"
FONT face="宋体"
table cellSpacing="1" cellPadding="0" width="777" align="center" bgColor="#336600" border="0"
tr
td bgColor="#08498c" colSpan="3"IMG src="images/FileSystemBaner.gif"/td
/tr
tr
td width="170" bgColor="#e3e3e3" rowSpan="2"
asp:linkbutton id="LinkButton1" runat="server"后退/asp:linkbutton/td
td width="604" bgColor="#efefef" colSpan="2"
asp:datalist id="DataList1" runat="server" RepeatColumns="4" RepeatDirection="Horizontal" DataKeyField="Name"
Width="604"
ItemTemplate
table width="150" align="center"
tr
td align="center" width="10"/td
td align="left" width="140"%#DataBinder.Eval(Container.DataItem,"Image")%
/td
/tr
tr
td width="10" align="right"
asp:CheckBox ID="checkBox1" Runat="server" //td
td width="140" align="left"font face="宋体"%#DataBinder.Eval(Container.DataItem,"Name")%/font/td
/tr
/table
/ItemTemplate
/asp:datalist/td
/tr
tr
td align="right" bgColor="#efefef" colSpan="2"asp:button id="Button3" runat="server" Text="删除选中项"/asp:button
input id="fileFeild1" type="file" name="fileFeild1" runat="server"
asp:button id="Button1" runat="server" Text="确定上传"/asp:buttonbr
asp:textbox id="TextBox1" runat="server"/asp:textbox
asp:button id="Button2" runat="server" Text="创建目录"/asp:button/td
/tr
tr
td bgColor="#888888" colSpan="3"span class="STYLE1"asp:label id="Label2" runat="server" ForeColor="White" 当前所在位置：/asp:labelSPAN class="STYLE1"asp:label id="Label1" runat="server" ForeColor="White" Width="87px"/asp:label/SPAN/span/td
/tr
/table
/FONT/FORM
/body
/HTML
后台代码:
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.IO;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace WebShop
{
/// summary
/// filesystem 的摘要说明。
/// /summary
public class filesystem : System.Web.UI.Page
{
protected System.Web.UI.WebControls.LinkButton LinkButton1;
protected System.Web.UI.WebControls.DataList DataList1;
protected System.Web.UI.WebControls.Button Button3;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.TextBox TextBox1;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.HtmlControls.HtmlInputFile fileFeild1;
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
Bind();
}
}
private void Bind()
{
string initpath="";
if(Request["path"]==null)
{
initpath=Server.MapPath("FileSystem");
}
else
{
initpath=Request["path"];
}
this.Label1.Text=initpath;
DataTable dt=new DataTable();
DataColumn dc0=new DataColumn("Image",System.Type.GetType("System.String"));
dt.Columns.Add(dc0);
DataColumn dc1=new DataColumn("Name",System.Type.GetType("System.String"));
dt.Columns.Add(dc1);
DirectoryInfo di=new DirectoryInfo(this.Label1.Text);
DirectoryInfo[] dis=di.GetDirectories();
foreach(DirectoryInfo d in dis)
{
DataRow dr=dt.NewRow();
dr[0]="a href='filesystem.aspx?path="+HttpUtility.UrlEncode(d.FullName,System.Text.Encoding.UTF8)+"'img src='images/folder.gif' border=0//a";
dr[1]=d.Name;
dt.Rows.Add(dr);
}
FileInfo[] fis=di.GetFiles();
foreach(FileInfo f in fis)
{
string ex=f.Extension.ToLower();
if(ex==".jpg" || ex==".jpeg" || ex==".gif" || ex==".png" || ex==".bmp")
{
string fullname=f.FullName;
string urlpath=fullname.Substring(fullname.IndexOf("FileSystem"));
string url=HttpUtility.UrlEncode(urlpath,System.Text.Encoding.UTF8);
DataRow dr=dt.NewRow();
dr[0]="a href='"+url+"' target='_blank'img src='"+url+"' border=0 width=100 height=128//a";
dr[1]=f.Name;
dt.Rows.Add(dr);
}
}
this.DataList1.DataSource=dt;
this.DataList1.DataBind();
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// summary
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// /summary
private void InitializeComponent()
{
this.LinkButton1.Click += new System.EventHandler(this.LinkButton1_Click);
this.Button3.Click += new System.EventHandler(this.Button3_Click);
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void LinkButton1_Click(object sender, System.EventArgs e)
{
string Parent=Directory.GetParent(this.Label1.Text).ToString();
if(Parent.IndexOf("FileSystem")-1)
{
Response.Redirect("filesystem.aspx?path="+Parent);
}
else
{
return;
}
}
private void Button1_Click(object sender, System.EventArgs e)
{
HttpPostedFile hpf=this.fileFeild1.PostedFile;
string ClientPath=hpf.FileName;
string filename=Path.GetFileName(ClientPath);
string ex=Path.GetExtension(filename);
if(ex==".jpg" || ex==".jpeg" || ex==".gif" || ex==".png" || ex==".bmp")
{
string SavePath=this.Label1.Text+"\\"+filename;
hpf.SaveAs(SavePath);
Bind();
}
else
{
Response.Write(Tools.GetAlertJS("所上传的图片格式不正确！"));
return;
}
}
private void Button2_Click(object sender, System.EventArgs e)
{
string filename=this.TextBox1.Text;
Directory.CreateDirectory(this.Label1.Text+"\\"+filename);
Bind();
}
private void Button3_Click(object sender, System.EventArgs e)
{
for(int i=0;ithis.DataList1.Items.Count;i++)
{
if(((CheckBox)this.DataList1.Items[i].FindControl("CheckBox1")).Checked)
{
int index=this.DataList1.Items[i].ItemIndex;
string filePath=this.Label1.Text+"\\"+this.DataList1.DataKeys[index].ToString();
if(Directory.Exists(filePath))
{
Directory.Delete(filePath,true);
}
if(File.Exists(filePath))
{
File.Delete(filePath);
}
Bind();
}
}
}
}
}
这个是C#的 你改下 Java的就行
File
F=new
File(路径);/通过将给定路径名字符串转换为抽象路径名来创建一个新
File
实例。
F.delete();//删除此抽象路径名表示的文件或目录。
文件的移动的话，得通过输入输出流
FileInputStream
FI=new
FileInputStream(F);
FileOutputStream
FO=new
FileOutputStream(F);
wile(FI.read()!=EOF)
{
FO.write();
}
