Android Open Source - downtown Utils

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License

The source code is released under:

GNU General Public License

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Java Source Code

package org.dklisiaris.downtown.helper;
/*  w  w  w .ja va2s . com*/
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

import android.util.Log;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.res.AssetManager;

public class Utils {
  private static final int BUFFER_SIZE=16384;
  Context mCt;
  AssetManager am;
  List<String> mapList = null;
  
  public Utils(Context ct){ mCt=ct; }

  /**
   * Gets content of a file in internal storage
   * @param filename The name of the file
   * @return String - content of filename
   */
    public String getStrFromInternalStorage(String filename){
        String strText="0";
        if(fileExistance(filename)){
          try {
              BufferedReader inputReader = new BufferedReader(new InputStreamReader(new ContextWrapper(mCt).openFileInput(filename)));
              String inputString;
              StringBuffer stringBuffer = new StringBuffer();                
              while ((inputString = inputReader.readLine()) != null) {
                  stringBuffer.append(inputString + "\n");
              }
              strText = stringBuffer.toString();
          } catch (IOException e) {
              e.printStackTrace();
          }
        }           
      return strText;        
    }

  /**
   * Checks if file existist in internal storage
   * @param fname The filename
   * @return boolean true if file exists in storage, false otherwise
   */
  public boolean fileExistance(String fname){
      File file = mCt.getFileStreamPath(fname);
      if(file.exists()){
          return true;
      }
      else{
          return false;
      }   
  }
  
  /**
   * Gets a list of file names in internal storage
   * @return A List<String> with file names 
   */
  public List<String> getFilesList(){
    List<String> fnames = new ArrayList<String>();
    for (String f : mCt.fileList()){
       fnames.add(f);       
    }
    return fnames;
  }
  
  /**
   * Gets a list of file names in some asset folder
   * @param folderName The name of the folder to check for assets
   * @return A List<String> with file names 
   */
  public List<String> getAssetList(String folderName){
    if (mapList == null) {
      mapList = new ArrayList<String>();
          am = mCt.getAssets();
          try {
              mapList.addAll(Arrays.asList(am.list(folderName)));
          } catch (IOException e) {
          }
      }
      return mapList;
  }
  

  /**
   * Checks if an asset exists.
   *
   * @param assetName
   * @return boolean - true if there is an asset with that name.
   */
  public boolean checkIfInAssets(String assetName,String folderName) {
      if (mapList == null) {
          am = mCt.getAssets();
          try {
              mapList = Arrays.asList(am.list(folderName));
          } catch (IOException e) {
          }
      }
      return mapList.contains(assetName);
  }  

}

Java Source Code List