本文實例為大家分享了Android九宮格圖片展示的具體代碼，供大家參考，具體內(nèi)容如下
此篇博客為整理文章，供大家學習。
1.首先下載commons-net jar包，可以百度下載。
FTP的文件上傳和下載的工具類：
package ryancheng.example.progressbar; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.io.RandomAccessFile; import org.apache.commons.net.ftp.FTP; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPFile; import org.apache.commons.net.ftp.FTPReply; import android.os.Environment; public class FTPManager { FTPClient ftpClient = null; public FTPManager() { ftpClient = new FTPClient(); } // 連接到ftp服務(wù)器 public synchronized boolean connect() throws Exception { boolean bool = false; if (ftpClient.isConnected()) {//判斷是否已登陸 ftpClient.disconnect(); } ftpClient.setDataTimeout(20000);//設(shè)置連接超時時間 ftpClient.setControlEncoding("utf-8"); ftpClient.connect("ip地址", 端口); if (FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) { if (ftpClient.login("用戶名", "密碼")) { bool = true; System.out.println("ftp連接成功"); } } return bool; } // 創(chuàng)建文件夾 public boolean createDirectory(String path) throws Exception { boolean bool = false; String directory = path.substring(0, path.lastIndexOf("/") + 1); int start = 0; int end = 0; if (directory.startsWith("/")) { start = 1; } end = directory.indexOf("/", start); while (true) { String subDirectory = directory.substring(start, end); if (!ftpClient.changeWorkingDirectory(subDirectory)) { ftpClient.makeDirectory(subDirectory); ftpClient.changeWorkingDirectory(subDirectory); bool = true; } start = end + 1; end = directory.indexOf("/", start); if (end == -1) { break; } } return bool; } // 實現(xiàn)上傳文件的功能 public synchronized boolean uploadFile(String localPath, String serverPath) throws Exception { // 上傳文件之前，先判斷本地文件是否存在 File localFile = new File(localPath); if (!localFile.exists()) { System.out.println("本地文件不存在"); return false; } System.out.println("本地文件存在，名稱為：" + localFile.getName()); createDirectory(serverPath); // 如果文件夾不存在，創(chuàng)建文件夾 System.out.println("服務(wù)器文件存放路徑：" + serverPath + localFile.getName()); String fileName = localFile.getName(); // 如果本地文件存在，服務(wù)器文件也在，上傳文件，這個方法中也包括了斷點上傳 long localSize = localFile.length(); // 本地文件的長度 FTPFile[] files = ftpClient.listFiles(fileName); long serverSize = 0; if (files.length == 0) { System.out.println("服務(wù)器文件不存在"); serverSize = 0; } else { serverSize = files[0].getSize(); // 服務(wù)器文件的長度 } if (localSize <= serverSize) { if (ftpClient.deleteFile(fileName)) { System.out.println("服務(wù)器文件存在,刪除文件,開始重新上傳"); serverSize = 0; } } RandomAccessFile raf = new RandomAccessFile(localFile, "r"); // 進度 long step = localSize / 100; long process = 0; long currentSize = 0; // 好了，正式開始上傳文件 ftpClient.enterLocalPassiveMode(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); ftpClient.setRestartOffset(serverSize); raf.seek(serverSize); OutputStream output = ftpClient.appendFileStream(fileName); byte[] b = new byte[1024]; int length = 0; while ((length = raf.read(b)) != -1) { output.write(b, 0, length); currentSize = currentSize + length; if (currentSize / step != process) { process = currentSize / step; if (process % 10 == 0) { System.out.println("上傳進度：" + process); } } } output.flush(); output.close(); raf.close(); if (ftpClient.completePendingCommand()) { System.out.println("文件上傳成功"); return true; } else { System.out.println("文件上傳失敗"); return false; } } // 實現(xiàn)下載文件功能，可實現(xiàn)斷點下載 public synchronized boolean downloadFile(String localPath, String serverPath) throws Exception { // 先判斷服務(wù)器文件是否存在 FTPFile[] files = ftpClient.listFiles(serverPath); if (files.length == 0) { System.out.println("服務(wù)器文件不存在"); return false; } System.out.println("遠程文件存在,名字為：" + files[0].getName()); localPath = localPath + files[0].getName(); // 接著判斷下載的文件是否能斷點下載 long serverSize = files[0].getSize(); // 獲取遠程文件的長度 File localFile = new File(localPath); long localSize = 0; if (localFile.exists()) { localSize = localFile.length(); // 如果本地文件存在，獲取本地文件的長度 if (localSize >= serverSize) { System.out.println("文件已經(jīng)下載完了"); File file = new File(localPath); file.delete(); System.out.println("本地文件存在，刪除成功，開始重新下載"); return false; } } // 進度 long step = serverSize / 100; long process = 0; long currentSize = 0; // 開始準備下載文件 ftpClient.enterLocalActiveMode(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); OutputStream out = new FileOutputStream(localFile, true); ftpClient.setRestartOffset(localSize); InputStream input = ftpClient.retrieveFileStream(serverPath); byte[] b = new byte[1024]; int length = 0; while ((length = input.read(b)) != -1) { out.write(b, 0, length); currentSize = currentSize + length; if (currentSize / step != process) { process = currentSize / step; if (process % 10 == 0) { System.out.println("下載進度：" + process); } } } out.flush(); out.close(); input.close(); // 此方法是來確保流處理完畢，如果沒有此方法，可能會造成現(xiàn)程序死掉 if (ftpClient.completePendingCommand()) { System.out.println("文件下載成功"); return true; } else { System.out.println("文件下載失敗"); return false; } } // 如果ftp上傳打開，就關(guān)閉掉 public void closeFTP() throws Exception { if (ftpClient.isConnected()) { ftpClient.disconnect(); } } } 具體實現(xiàn)看代碼注釋寫的很詳細。
一.Android中FTP文件上傳代碼：
// 上傳例子 private void ftpUpload() { new Thread() { public void run() { try { System.out.println("正在連接ftp服務(wù)器...."); FTPManager ftpManager = new FTPManager(); if (ftpManager.connect()) { if (ftpManager.uploadFile(ftpManager.rootPath + "UpdateXZMarketPlatform.apk", "mnt/sdcard/")) { ftpManager.closeFTP(); } } } catch (Exception e) { // TODO: handle exception // System.out.println(e.getMessage()); } } }.start(); } 二.Android中FTP文件下載代碼：
// 下載例子 private void ftpDownload() { new Thread() { public void run() { try { System.out.println("正在連接ftp服務(wù)器...."); FTPManager ftpManager = new FTPManager(); if (ftpManager.connect()) { if (ftpManager.downloadFile(ftpManager.rootPath, "20120723_XFQ07_XZMarketPlatform.db")) { ftpManager.closeFTP(); } } } catch (Exception e) { // TODO: handle exception // System.out.println(e.getMessage()); } } }.start(); } 自己之前做項目的時候?qū)戇^的FTP上傳代碼：
package com.kandao.yunbell.videocall; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.SocketException; import org.apache.commons.net.ftp.FTP; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPReply; import com.kandao.yunbell.common.SysApplication; import android.content.Context; import android.util.Log; public class MyUploadThread extends Thread { private String fileName;// 文件名字 private String filePath;// 文件本地路徑 private String fileStoragePath;// 文件服務(wù)器存儲路徑 private String serverAddress;// 服務(wù)器地址 private String ftpUserName;// ftp賬號 private String ftpPassword;// ftp密碼 private Context mContext; public MyUploadThread() { super(); // TODO Auto-generated constructor stub } public MyUploadThread(Context mContext,String fileName, String filePath, String fileStoragePath,String serverAddress,String ftpUserName,String ftpPassword) { super(); this.fileName = fileName; this.filePath = filePath; this.fileStoragePath = fileStoragePath; this.serverAddress = serverAddress; this.ftpUserName = ftpUserName; this.ftpPassword = ftpPassword; this.mContext=mContext; } @Override public void run() { super.run(); try { FileInputStream fis=null; FTPClient ftpClient = new FTPClient(); String[] idPort = serverAddress.split(":"); ftpClient.connect(idPort[0], Integer.parseInt(idPort[1])); int returnCode = ftpClient.getReplyCode(); Log.i("caohai", "returnCode,upload:"+returnCode); boolean loginResult = ftpClient.login(ftpUserName, ftpPassword); Log.i("caohai", "loginResult:"+loginResult); if (loginResult && FTPReply.isPositiveCompletion(returnCode)) {// 如果登錄成功 // 設(shè)置上傳目錄 if (((SysApplication) mContext).getIsVideo()) { ((SysApplication) mContext).setIsVideo(false); boolean ff=ftpClient.changeWorkingDirectory(fileStoragePath + "/video/"); Log.i("caohai", "ff:"+ff); }else{ boolean ee=ftpClient.changeWorkingDirectory(fileStoragePath + "/photo/"); Log.i("caohai", "ee:"+ee); } ftpClient.setBufferSize(1024); // ftpClient.setControlEncoding("iso-8859-1"); // ftpClient.enterLocalPassiveMode(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); fis = new FileInputStream(filePath + "/" + fileName); Log.i("caohai", "fileStoragePath00000:"+fileStoragePath); String[] path = fileStoragePath.split("visitorRecord"); boolean fs = ftpClient.storeFile(new String((path[1] + "/photo/" + fileName).getBytes(), "iso-8859-1"), fis); Log.i("caohai", "shifoushangchuanchenggong:"+fs); fis.close(); ftpClient.logout(); //ftpClient.disconnect(); } else {// 如果登錄失敗 ftpClient.disconnect(); } } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SocketException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } 以上就是本文的全部內(nèi)容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網(wǎng)。
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