基于Android平台的智慧城市公交线路查询系统的设计与实现APP源码含文档

package com.ideabobo.tool; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.nio.channels.FileChannel; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.AsyncTask; import android.os.Environment; import android.util.Log; public class FileTool extends AsyncTask<String, Void, Integer>{ private static final String COMMAND_BACKUP = "backupDatabase"; public static final String COMMAND_RESTORE = "restroeDatabase"; private Context mContext; public FileTool(Context context) { this.mContext = context; } @Override public Integer doInBackground(String... params) { // TODO Auto-generated method stub // 获得正在使用的数据库路径，我的是 sdcard 目录下的 /dlion/db_dlion.db // 默认路径是 /data/data/(包名)/databases/*.db // File dbFile = mContext.getDatabasePath(Environment // .getExternalStorageDirectory().getAbsolutePath() // + "/dlion/db_dlion.db"); File dbFileDir = mContext.getDatabasePath("/data/data/com.ideabobo.gap/"); File exportDir = new File(Environment.getExternalStorageDirectory(), "ideaback/"); if (!exportDir.exists()) { exportDir.mkdirs(); } String command = params[0]; if (command.equals(COMMAND_BACKUP)) { try { copyDirectiory(dbFileDir.getAbsolutePath(), exportDir.getAbsolutePath()); return Log.d("backup", "ok"); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); return Log.d("backup", "fail"); } } else if (command.equals(COMMAND_RESTORE)) { try { copyDirectiory(exportDir.getAbsolutePath(), dbFileDir.getAbsolutePath()); return Log.d("restore", "success"); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); return Log.d("restore", "fail"); } } else { return null; } } private void fileCopy(File dbFile, File backup) throws IOException { // TODO Auto-generated method stub FileChannel inChannel = new FileInputStream(dbFile).getChannel(); FileChannel outChannel = new FileOutputStream(backup).getChannel(); try { inChannel.transferTo(0, inChannel.size(), outChannel); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (inChannel != null) { inChannel.close(); } if (outChannel != null) { outChannel.close(); } } } // 复制文件夹 public static void copyDirectiory(String sourceDir, String targetDir) throws IOException { // 新建目标目录 (new File(targetDir)).mkdirs(); // 获取源文件夹当前下的文件或目录 File[] file = (new File(sourceDir)).listFiles(); for (int i = 0; i < file.length; i++) { if (file[i].isFile()) { // 源文件 File sourceFile = file[i]; // 目标文件 File targetFile = new File(new File(targetDir).getAbsolutePath() + File.separator + file[i].getName()); copyFile(sourceFile, targetFile); } else if (file[i].isDirectory()) { // 准备复制的源文件夹 String dir1 = sourceDir + "/" + file[i].getName(); // 准备复制的目标文件夹 String dir2 = targetDir + "/" + file[i].getName(); copyDirectiory(dir1, dir2); } } } // 复制文件 public static void copyFile(File sourceFile, File targetFile) throws IOException { BufferedInputStream inBuff = null; BufferedOutputStream outBuff = null; try { // 新建文件输入流并对它进行缓冲 inBuff = new BufferedInputStream(new FileInputStream(sourceFile)); // 新建文件输出流并对它进行缓冲 outBuff = new BufferedOutputStream(new FileOutputStream(targetFile)); // 缓冲数组 byte[] b = new byte[1024 * 5]; int len; while ((len = inBuff.read(b)) != -1) { outBuff.write(b, 0, len); } // 刷新此缓冲的输出流 outBuff.flush(); } finally { // 关闭流 if (inBuff != null) inBuff.close(); if (outBuff != null) outBuff.close(); } } public static void delFolder(String folderPath) { try { delAllFile(folderPath); //删除完里面所有内容 String filePath = folderPath; filePath = filePath.toString(); java.io.File myFilePath = new java.io.File(filePath); myFilePath.delete(); //删除空文件夹 } catch (Exception e) { e.printStackTrace(); } } //删除指定文件夹下所有文件 //param path 文件夹完整绝对路径 public static boolean delAllFile(String path) { boolean flag = false; File file = new File(path); if (!file.exists()) { return flag; } if (!file.isDirectory()) { return flag; } String[] tempList = file.list(); File temp = null; for (int i = 0; i < tempList.length; i++) { if (path.endsWith(File.separator)) { temp = new File(path + tempList[i]); } else { temp = new File(path + File.separator + tempList[i]); } if (temp.isFile()) { temp.delete(); } else if (temp.isDirectory()) { delAllFile(path + "/" + tempList[i]);//先删除文件夹里面的文件 delFolder(path + "/" + tempList[i]);//再删除空文件夹 flag = true; } } return flag; } public static String getSDPath(){ File sdDir = null; boolean sdCardExist = Environment.getExternalStorageState() .equals(android.os.Environment.MEDIA_MOUNTED); //判断sd卡是否存在 if(sdCardExist){ sdDir = Environment.getExternalStorageDirectory();//获取跟目录 } return sdDir.toString(); } public static final String[][] MIME_MapTable={ //{后缀名， MIME类型} {".3gp", "video/3gpp"}, {".apk", "application/vnd.android.package-archive"}, {".asf", "video/x-ms-asf"}, {".avi", "video/x-msvideo"}, {".bin", "application/octet-stream"}, {".bmp", "image/bmp"}, {".c", "text/plain"}, {".class", "application/octet-stream"}, {".conf", "text/plain"}, {".cpp", "text/plain"}, {".doc", "application/msword"}, {".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"}, {".xls", "application/vnd.ms-excel"}, {".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.shee