File Name Extension Utils : File « File « Android






  1. Android
  2. File
  3. File

File Name Extension Utils

    
//package com.akjava.lib.android.util;

import java.io.File;

import android.net.Uri;

/**
 * 
 * TODO merge to jakarta-commons-io filenameutils
 * 
 * (c)2009 aki akjava.com
 *
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
   
 *
 */

public class FileNameUtils {
  public static String getExtension(File file){
    return getExtension(file.getName());
  }
  
  public static String getExtension(String name){
    String ext;
    if(name.lastIndexOf(".")==-1){
      ext="";
    
    }else{
      int index=name.lastIndexOf(".");
      ext=name.substring(index+1,name.length());
    }
    return ext;
  }
  
  public static String getRemovedExtensionName(String name){
    String baseName;
    if(name.lastIndexOf(".")==-1){
      baseName=name;
    
    }else{
      int index=name.lastIndexOf(".");
      baseName=name.substring(0,index);
    }
    return baseName;
  }
  
  public static File getChangedExtensionFile(File file,String extension,boolean overwrite){
    File newFile=null;
    String baseName=null;
    if(file.getName().lastIndexOf(".")==-1){
      baseName=file.getName();
    
    }else{
      int index=file.getName().lastIndexOf(".");
      baseName=file.getName().substring(0,index);
    }
    String bName=baseName;
    if(!extension.equals("")){
      bName+="."+extension;
    }
    newFile=new File(file.getParent(),bName);
    int index=1;
    
    
    
    if(!overwrite){
    while(newFile.exists()){
      String specific="("+index+")";
      String tmpName=baseName+specific;
      if(!extension.equals("")){
        tmpName+="."+extension;
        }
      newFile=new File(file.getParent(),tmpName);
      index++;
    }
    }
    return newFile;
  }
  public static final String SCHME_FILE="file";
  public static final String SCHME_FILE_AND_SEPARATOR="file://";
  public static String uriToPath(Uri uri){
    if(uri.getScheme().equals(SCHME_FILE)){
           return uri.getPath();
           }
    return null;
  }
  public static Uri pathToUri(String path){
    return Uri.parse(SCHME_FILE_AND_SEPARATOR+path);
  }

  public static boolean isFileUri(String uri){
    return uri!=null && uri.startsWith(SCHME_FILE_AND_SEPARATOR);
  }
  public static String uriToPath(String uri) {
    if(isFileUri(uri)){
      return uri.substring(SCHME_FILE_AND_SEPARATOR.length());
    }
    return null;
  }
}








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