get suffix of file from path - Android java.io

Android examples for java.io:File Path

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  2. Android
  3. java.io
  4. File Path

Description

get suffix of file from path

Demo Code

import android.app.Activity;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.MediaStore;
import android.text.TextUtils;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class Main{

    /**//  w w w  .  j ava2  s. c  o m
     * get suffix of file from path
     * <p/>
     * <pre>
     *      getFileExtension(null)               =   ""
     *      getFileExtension("")                 =   ""
     *      getFileExtension("   ")              =   "   "
     *      getFileExtension("a.mp3")            =   "mp3"
     *      getFileExtension("a.b.rmvb")         =   "rmvb"
     *      getFileExtension("abc")              =   ""
     *      getFileExtension("c:\\")              =   ""
     *      getFileExtension("c:\\a")             =   ""
     *      getFileExtension("c:\\a.b")           =   "b"
     *      getFileExtension("c:a.txt\\a")        =   ""
     *      getFileExtension("/home/admin")      =   ""
     *      getFileExtension("/home/admin/a.txt/b")  =   ""
     *      getFileExtension("/home/admin/a.txt/b.mp3")  =   "mp3"
     * </pre>
     *
     * @return
     */
    public static String getFileExtension(String filePath) {


        int extenPosi = filePath.lastIndexOf(FILE_EXTENSION_SEPARATOR);
        int filePosi = filePath.lastIndexOf(File.separator);
        if (extenPosi == -1) {
            return "";
        }
        return (filePosi >= extenPosi) ? "" : filePath
                .substring(extenPosi + 1);
    }

}

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