WriteFile.java

package com.jqyd.app;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;

import com.jqyd.pub.JqydDateUtil;

import android.content.Context;
import android.os.Environment;
import android.util.Log;

public class WriteFile {
	private static String logStr = "walktour";
	private String fileName;
	private Context context;
	
	private static String currDay = null;
	SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
	

	public WriteFile(Context context,String fileName) {		
		this.context = context;
		this.fileName = fileName;
		currDay = dateFormat.format(new Date());
	}
	
	/**
	 * 写入日志
	 * @param content
	 * @return
	 */
	public boolean writeToFile(String content)  {
		
		content = JqydDateUtil.getDateSecOne(new Date())+content +"\n";
		boolean flag = true;
		String path = "";
 	   //判断是写入到SD卡中还是内存中，优先SD卡
 	   if ((!Environment.getExternalStorageState().equals(   
	               Environment.MEDIA_MOUNTED))) {//内存
 		  path= context.getFilesDir().getAbsolutePath() + File.separator + logStr+ File.separator+ "jqgj_recordLog";   
 	   }else{//SD卡
 		  path=Environment.getExternalStorageDirectory().getPath() + File.separator + logStr+ File.separator + "jqgj_recordLog";
 	   }
		Log.i("RECORDLOG", "文件path:"+path);
		File dirfile = new File(path);
		if (!dirfile.exists()) {
			dirfile.mkdirs();
		}
		File file = new File(path + File.separator + fileName + ".txt");
		try {
			FileOutputStream fos = new FileOutputStream(file, true);
			byte[] ba = content.getBytes("utf-8");
			content = new String(ba);
			fos.write(content.getBytes());
			fos.flush();
			fos.close();

		} 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();
		}

		return flag;
	}
	
	/**
	 * 删除文件
	 */
	public void deleteFile(int n){
		ArrayList<File> delFileName = new ArrayList<File>();
		String record_path = "";
		String err_path = "";
	 	   //判断是写入到SD卡中还是内存中，优先SD卡
	 	   if ((!Environment.getExternalStorageState().equals(   
		               Environment.MEDIA_MOUNTED))) {//内存
	 		  record_path= context.getFilesDir().getAbsolutePath() + File.separator + logStr+ File.separator+ "jqgj_recordLog";   
	 	   }else{//SD卡
	 		  record_path=Environment.getExternalStorageDirectory().getPath() + File.separator + logStr+ File.separator + "jqgj_recordLog";
	 	   }
	 	   //判断是写入到SD卡中还是内存中，优先SD卡
	 	   if ((!Environment.getExternalStorageState().equals(   
		               Environment.MEDIA_MOUNTED))) {//内存
	 		  err_path= context.getFilesDir().getAbsolutePath() + File.separator + logStr+ File.separator+ "crash";   
	 	   }else{//SD卡
	 		  err_path=Environment.getExternalStorageDirectory().getPath() + File.separator + logStr+ File.separator + "crash";
	 	   }
		 try {
			File recorDirfile = new File(record_path);
			File errDirfile = new File(err_path);
			File file = null;
			File recordFileArr[] = recorDirfile.listFiles();
			int df = 0;
			if(recordFileArr!=null){
				for(int i=0;i<recordFileArr.length;i++){
					file = recordFileArr[i];
					String fileDate = dateFormat.format(new Date(file.lastModified()));
					System.out.println("文件名："+file.getName());
					//System.out.println("转换后的日期："+fileDate);
					//判断文件和制定日期的关系，删除最近的五天之外的数据
					long day = getQuot(fileDate,currDay);
					if(day>=n){
						df++;				
						delFileName.add(file);
					}
				}
			}
			
			System.out.println("删除的记录日志数："+df);
			writeToFile("删除的记录日志数："+df);
			SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd/HH:mm:ss");
			String log = "操作日期："+dateFormat.format(new Date())+"---删除的日志记录数："+df;
			//错误日志
			
			File errFileArr[] = errDirfile.listFiles();
			if(errFileArr!=null){
				df = 0;
				for(int i=0;i<errFileArr.length;i++){
					file = errFileArr[i];
					String fileDate = dateFormat.format(new Date(file.lastModified()));
					System.out.println("错误日志文件名："+file.getName());
					//System.out.println("错误日志转换后的日期："+fileDate);
					//判断文件和制定日期的关系，删除最近的五天之外的数据
					long day = getQuot(fileDate,currDay);
					if(day>=n){
						df++;				
						delFileName.add(file);
					}
				}
				System.out.println("需要删除的错误日志数："+df);
				writeToFile("需要删除的错误日志数："+df);
			}
			
			//执行删除操作
			int del = 0;
			for(File f : delFileName){
				del++;
				boolean dres = f.delete();
				System.out.println("第"+del+"个文件，删除结果："+dres);
			}
			log += ",删除的错误日志记录数："+del;
			writeToFile(log);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			writeToFile("没有SD卡，无法获取或写入日志");
		}
	}
	
	/**
	 * 操作时间
	 */
	public void recordOptTime(String tContent){
			writeToFile(tContent);
	}

	/**
	 * 计算相差天数
	 * @param time1
	 * @param time2
	 * @return
	 */
	public long getQuot(String time1, String time2){
		  long quot = 0;
		  SimpleDateFormat ft = new SimpleDateFormat("yyyy-MM-dd");
		  try {
		   Date date1 = ft.parse(time1);
		   Date date2 = ft.parse(time2);
		   quot = date2.getTime() - date1.getTime();
		   quot = quot / 1000 / 60 / 60 / 24;
		  } catch (ParseException e) {
		   e.printStackTrace();
		  }
		  return quot;
		 }		
}