Save to Android local file system : File « File « Android

1. Android
2. File
3. File

Save to Android local file system

    

//package com.a4studio.android.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

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

public class NewsPersistence {
  
  private final static String TAG = NewsPersistence.class.getSimpleName();
  
  private File sdcardStorage;
  private String sdcardPath;
  private String newsPath;
  
  private final static String PACKAGE_NAME = "news_wmu"; 
  
  private final static String fileExtensionName = ".wdata";  
  private int fileNum = 0;
  
  public NewsPersistence() throws Exception
  {
    
    if(Environment.getExternalStorageState().equalsIgnoreCase(Environment.MEDIA_REMOVED))
    {
      throw new Exception("no external storage like sdcard");
    }
    
    sdcardStorage = Environment.getExternalStorageDirectory();
    sdcardPath = sdcardStorage.getParent() + java.io.File.separator + sdcardStorage.getName();
    newsPath = sdcardPath+java.io.File.separator + PACKAGE_NAME;
    
    File newsFile = new File(newsPath);
    
    if(!newsFile.exists())
    {
      newsFile.mkdir();
    }
  }
  
  public synchronized List<String> getFileList()
  {
    List<String> files = new ArrayList<String>();
    
    File dir = new File(newsPath);  
    
    for(File file : dir.listFiles())
    {
      if(file.isFile() && file.getName().endsWith(fileExtensionName)){
        files.add(file.getName());  
      }
      
    }
    
    return files;
  }

  public synchronized void storeNewsItemList(List<NewsItem> items) throws IOException
  {
    for(NewsItem item : items)
    {
      fileNum++;
      long ticket = System.currentTimeMillis();
      String filename = newsPath+java.io.File.separator + ticket+fileNum+fileExtensionName;
      File newfile = new File(filename);
      newfile.createNewFile();
        
      
      ObjectOutputStream objOutput = new ObjectOutputStream(new FileOutputStream(newfile));
      objOutput.writeObject(item);
    }

  }
  
  public synchronized void storeNewsItem(NewsItem item) throws IOException
  {
    Log.d(TAG, "storeNewsItem"+item.getContent());
    fileNum++;
    long ticket = System.currentTimeMillis();
    String filename = newsPath + java.io.File.separator + ticket + fileNum
        + fileExtensionName;
    File newfile = new File(filename);
    newfile.createNewFile();
    ObjectOutputStream objOutput = new ObjectOutputStream(
        new FileOutputStream(newfile));
    objOutput.writeObject(item);

  }
  
  public synchronized List<NewsItem> retrieveNewsItem() throws Exception
  {  
    File dir = new File(newsPath);
    List<NewsItem> items = new ArrayList<NewsItem>();
    for(File file : dir.listFiles())
    {
      if(file.isFile() && file.getName().endsWith(fileExtensionName))
      {
        ObjectInputStream input = new ObjectInputStream(new FileInputStream(file));
        NewsItem item = (NewsItem)input.readObject();
        Log.d(TAG, "retrieveNewsItem"+file.getName());
        items.add(item);
      }

    }
    
    return items;
  }         
  
  public synchronized void removeAllNewsItems() 
  {
    File dir = new File(newsPath);
    
    for(File file : dir.listFiles())
    {
      if(!file.delete())
      {
        Log.e(TAG, "delete file "+file.getName() + "delete fail");
      }
    }
  }
  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub

  }

}
class NewsItem implements Serializable{

  /**
   * 
   */
  private static final long serialVersionUID = 1L;
  
  public final static String RESULT = "Result";
  public final static String TITLE = "Title";
  public final static String SUMMARY = "Summary";
  public final static String URL = "Url";
  public final static String CLICKURL = "ClickUrl";
  public final static String NEWSSOURCE = "NewsSource";
  public final static String NEWSSOURCEURL = "NewsSourceUrl";
  public final static String LANGUAGE = "Language";
  public final static String PUBLISHDATE = "PublishDate";
  public final static String MODIFICATIONDATE = "ModificationDate";

  private String title;
  private String summary;
  private String url;
  private String clickUrl;
  private String newsSource;
  private String newsSrouceUrl;
  private String language;
  private long publishDate;
  private long modifDate;
  
  private String content;

  /**
   * @return the title
   */
  public String getTitle() {
    return title;
  }

  /**
   * @param title
   *            the title to set
   */
  public void setTitle(String title) {
    this.title = title;
  }

  /**
   * @return the summary
   */
  public String getSummary() {
    return summary;
  }

  /**
   * @param summary
   *            the summary to set
   */
  public void setSummary(String summary) {
    this.summary = summary;
  }

  /**
   * @return the url
   */
  public String getUrl() {
    return url;
  }

  /**
   * @param url
   *            the url to set
   */
  public void setUrl(String url) {
    this.url = url;
  }

  /**
   * @return the clickUrl
   */
  public String getClickUrl() {
    return clickUrl;
  }

  /**
   * @param clickUrl
   *            the clickUrl to set
   */
  public void setClickUrl(String clickUrl) {
    this.clickUrl = clickUrl;
  }

  /**
   * @return the newsSource
   */
  public String getNewsSource() {
    return newsSource;
  }

  /**
   * @param newsSource
   *            the newsSource to set
   */
  public void setNewsSource(String newsSource) {
    this.newsSource = newsSource;
  }

  /**
   * @return the newsSrouceUrl
   */
  public String getNewsSrouceUrl() {
    return newsSrouceUrl;
  }

  /**
   * @param newsSrouceUrl
   *            the newsSrouceUrl to set
   */
  public void setNewsSrouceUrl(String newsSrouceUrl) {
    this.newsSrouceUrl = newsSrouceUrl;
  }

  /**
   * @return the language
   */
  public String getLanguage() {
    return language;
  }

  /**
   * @param language
   *            the language to set
   */
  public void setLanguage(String language) {
    this.language = language;
  }

  /**
   * @return the publishDate
   */
  public long getPublishDate() {
    return publishDate;
  }

  /**
   * @param publishDate
   *            the publishDate to set
   */
  public void setPublishDate(long publishDate) {
    this.publishDate = publishDate;
  }

  /**
   * @return the modifDate
   */
  public long getModifDate() {
    return modifDate;
  }

  /**
   * @param modifDate
   *            the modifDate to set
   */
  public void setModifDate(long modifDate) {
    this.modifDate = modifDate;
  }

  
  /**
   * @return the content
   */
  public String getContent() {
    return content;
  }

  /**
   * @param content the content to set
   */
  public void setContent(String content) {
    this.content = content;
  }

  /* (non-Javadoc)
   * @see java.lang.Object#toString()
   */
  @Override
  public String toString() {
    // TODO Auto-generated method stub
    return this.title+"\n"+
    this.summary +"\n"+
    this.url+"\n"+
    this.clickUrl+"\n"+
    this.newsSource+"\n"+
    this.newsSrouceUrl+"\n"+
    this.language+"\n"+
    this.publishDate+"\n"+
    this.modifDate+"\n";
  }

  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub

  }

}

   
    
    
    
  

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