Android to determine the type of file

Import Java.util.hashmap;import java.util.iterator;/** * Determine the type of file */public class Mediafileutil {public static String SF    Ileextensions;    Audio public static final int file_type_mp3 = 1;    public static final int file_type_m4a = 2;    public static final int file_type_wav = 3;    public static final int file_type_amr = 4;    public static final int file_type_awb = 5;    public static final int file_type_wma = 6;    public static final int file_type_ogg = 7;    private static final int first_audio_file_type = File_type_mp3;    private static final int last_audio_file_type = File_type_ogg;    MIDI public static final int file_type_mid = 11;    public static final int FILE_TYPE_SMF = 12;    public static final int file_type_imy = 13;    private static final int first_midi_file_type = File_type_mid;    private static final int last_midi_file_type = File_type_imy;    Video public static final int file_type_mp4 = 21; Publicstatic final int file_type_m4v = 22;    public static final int file_type_3gpp = 23;    public static final int file_type_3gpp2 = 24;    public static final int file_type_wmv = 25;    private static final int first_video_file_type = File_type_mp4;    private static final int last_video_file_type = file_type_wmv;    Image public static final int file_type_jpeg = 31;    public static final int file_type_gif = 32;    public static final int file_type_png = 33;    public static final int file_type_bmp = 34;    public static final int file_type_wbmp = 35;    private static final int first_image_file_type = File_type_jpeg;    private static final int last_image_file_type = file_type_wbmp;    Playlist public static final int file_type_m3u = 41;    public static final int file_type_pls = 42;    public static final int file_type_wpl = 43;    private static final int first_playlist_file_type = file_type_m3u; private static final int last_playlist_file_type = FILE_TYPE_WPL;        Static inner class static classes Mediafiletype {int fileType;        String MimeType;            Mediafiletype (int fileType, String mimeType) {this.filetype = FileType;        This.mimetype = MimeType; }} private static hashmap<string, mediafiletype> Sfiletypemap = new hashmap<string, mediafilety    Pe> ();    private static hashmap<string, integer> Smimetypemap = new hashmap<string, integer> (); static void Addfiletype (string extension, int fileType, string mimeType) {sfiletypemap.put (extension, new Mediafil        EType (FileType, MimeType));    Smimetypemap.put (MimeType, New Integer (FileType));        } static {Addfiletype ("MP3", File_type_mp3, "audio/mpeg");        Addfiletype ("M4A", file_type_m4a, "Audio/mp4");        Addfiletype ("WAV", File_type_wav, "audio/x-wav");        Addfiletype ("AMR", File_type_amr, "audio/amr"); Addfiletype ("AWB", FILE_TYPE_AWB, "auDIO/AMR-WB ");        Addfiletype ("WMA", File_type_wma, "audio/x-ms-wma");        Addfiletype ("OGG", File_type_ogg, "Application/ogg");        Addfiletype ("MID", File_type_mid, "Audio/midi");        Addfiletype ("XMF", File_type_mid, "Audio/midi");        Addfiletype ("RTTTL", File_type_mid, "Audio/midi");        Addfiletype ("SMF", FILE_TYPE_SMF, "Audio/sp-midi");        Addfiletype ("IMY", File_type_imy, "audio/imelody");        Addfiletype ("MP4", File_type_mp4, "Video/mp4");        Addfiletype ("M4V", file_type_m4v, "Video/mp4");        Addfiletype ("3GP", FILE_TYPE_3GPP, "VIDEO/3GPP");        Addfiletype ("3GPP", FILE_TYPE_3GPP, "VIDEO/3GPP");        Addfiletype ("3g2", File_type_3gpp2, "video/3gpp2");        Addfiletype ("3GPP2", File_type_3gpp2, "video/3gpp2");        Addfiletype ("WMV", file_type_wmv, "video/x-ms-wmv");        Addfiletype ("JPG", File_type_jpeg, "image/jpeg");        Addfiletype ("JPEG", File_type_jpeg, "image/jpeg");   Addfiletype ("GIF", File_type_gif, "image/gif");     Addfiletype ("PNG", File_type_png, "image/png");        Addfiletype ("BMP", File_type_bmp, "image/x-ms-bmp");        Addfiletype ("WBMP", File_type_wbmp, "image/vnd.wap.wbmp");        Addfiletype ("m3u", file_type_m3u, "Audio/x-mpegurl");        Addfiletype ("PLS", File_type_pls, "Audio/x-scpls");        Addfiletype ("WPL", FILE_TYPE_WPL, "APPLICATION/VND.MS-WPL");        Compute file extensions list for native Media Scanner StringBuilder builder = new StringBuilder ();        iterator<string> Iterator = Sfiletypemap.keyset (). Iterator ();            while (Iterator.hasnext ()) {if (builder.length () > 0) {builder.append (', ');        } builder.append (Iterator.next ());    } sfileextensions = Builder.tostring ();    public static final String unknown_string = "<unknown>";                public static Boolean isaudiofiletype (int fileType) {return (FileType >= first_audio_file_type && FileType <= Last_audio_file_type) | |    (FileType >= first_midi_file_type && fileType <= last_midi_file_type));                } public static Boolean isvideofiletype (int fileType) {return (FileType >= first_video_file_type &&    FileType <= Last_video_file_type);                } public static Boolean isimagefiletype (int fileType) {return (FileType >= first_image_file_type &&    FileType <= Last_image_file_type); } public static Boolean isplaylistfiletype (int fileType) {return (FileType >= First_playlist_file_type &    & FileType <= Last_playlist_file_type);        public static Mediafiletype Getfiletype (String path) {int lastdot = Path.lastindexof (".");        if (Lastdot < 0) return null;    Return Sfiletypemap.get (path.substring (Lastdot + 1). toUpperCase ()); }//According to the video file path determine the file type public static Boolean Isvideofiletype (String path) {Mediafiletype type = getfiletype (path);        if (null! = Type) {return isvideofiletype (Type.filetype);    } return false; }//According to the audio file path determine the file type public static Boolean Isaudiofiletype (String path) {Mediafiletype type = Getfiletype (PA        TH);        if (null! = Type) {return isaudiofiletype (Type.filetype);    } return false; }//view file type according to MIME type public static int getfiletypeformimetype (String mimeType) {Integer value = SMIMETYPEMAP.G        ET (MimeType);    return (value = = null? 0:value.intvalue ()); }//According to the picture file path determine the file type public static Boolean Isimagefiletype (String path) {Mediafiletype type = Getfiletype (PA        TH);        if (null! = Type) {return isimagefiletype (Type.filetype);    } return false; }}

　　

Android to determine the type of file