在开发中有需求是根据文件类型进行相关的操作，接下来的重点就是根据文件路径来匹配文件类型了
具体操作如下：
public static String sFileExtensions;
// Audio file types
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;
public static final int FILE_TYPE_RMVB = 8;
private static final int FIRST_AUDIO_FILE_TYPE = FILE_TYPE_MP3;
private static final int LAST_AUDIO_FILE_TYPE = FILE_TYPE_RMVB;
// MIDI file types
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 file types
public static final int FILE_TYPE_TS = 15;
public static final int FILE_TYPE_MOV = 16;
public static final int FILE_TYPE_H264 = 17;
public static final int FILE_TYPE_H263 = 18;
public static final int FILE_TYPE_MKV = 19;
public static final int FILE_TYPE_ASF = 20;
public static final int FILE_TYPE_MP4 = 21;
public static 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;
public static final int FILE_TYPE_AVI = 26;
public static final int FILE_TYPE_MPEG = 27;
public static final int FILE_TYPE_FLV = 28;
public static final int FILE_TYPE_OGV = 29;
public static final int FILE_TYPE_WEBM = 30;
private static final int FIRST_VIDEO_FILE_TYPE = FILE_TYPE_TS;
private static final int LAST_VIDEO_FILE_TYPE = FILE_TYPE_WEBM;
// Image file types
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 file types
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;
public static final int FILE_TYPE_DOC = 51;
public static final int FILE_TYPE_DOCX = 52;
public static final int FILE_TYPE_XLS = 53;
public static final int FILE_TYPE_XLSX = 54;
public static final int FILE_TYPE_TXT = 55;
public static final int FILE_TYPE_PPT = 56;
public static final int FILE_TYPE_PPTX = 57;
public static final int FILE_TYPE_PDF = 58;
//静态内部类
static class 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, MediaFileType>();
private static HashMap<String, Integer> sMimeTypeMap
= new HashMap<String, Integer>();
static void addFileType(String extension, int fileType, String mimeType) {
sFileTypeMap.put(extension, new MediaFileType(fileType, mimeType));
sMimeTypeMap.put(mimeType, new Integer(fileType));
}
static {
addFileType("MP3", FILE_TYPE_MP3, "audio/x-mpeg");
addFileType("MP2", FILE_TYPE_MP3, "audio/x-mpeg");
addFileType("M4A", FILE_TYPE_M4A, "audio/mp4a-latm");
addFileType("M4B", FILE_TYPE_M4A, "audio/mp4a-latm");
addFileType("M4P", FILE_TYPE_M4A, "audio/mp4a-latm");
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("M3U", FILE_TYPE_M3U, "audio/x-mpegurl");
addFileType("PLS", FILE_TYPE_PLS, "audio/x-scpls");
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("RMVB", FILE_TYPE_RMVB, "audio/x-pn-realaudio");
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("ASF", FILE_TYPE_ASF, "video/x-ms-asf");
addFileType("AVI", FILE_TYPE_AVI, "video/video/x-msvideo");
addFileType("MPEG", FILE_TYPE_MPEG, "video/mpeg");
addFileType("MPG", FILE_TYPE_MPEG, "video/mpeg");
addFileType("MPE", FILE_TYPE_MPEG, "video/mpeg");
addFileType("FLV", FILE_TYPE_FLV, "video/x-flv");
addFileType("F4V", FILE_TYPE_FLV, "video/x-flv");
addFileType("OGV", FILE_TYPE_OGV, "video/ogg");
addFileType("WEBM", FILE_TYPE_WEBM, "video/webm");
addFileType("TS", FILE_TYPE_TS, "video/MP2T");
addFileType("MOV", FILE_TYPE_MOV, "video/quicktime");
addFileType("H264", FILE_TYPE_H264, "video/h264");
addFileType("H263", FILE_TYPE_H263, "video/h263");
addFileType("MKV", FILE_TYPE_MKV, "video/x-matroska");
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("WPL", FILE_TYPE_WPL, "application/vnd.ms-wpl");
addFileType("DOC", FILE_TYPE_DOC, "application/msword");
addFileType("DOCX", FILE_TYPE_DOCX, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
addFileType("XLS", FILE_TYPE_XLS, "application/vnd.ms-excel");
addFileType("XLSX", FILE_TYPE_XLSX, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
addFileType("TXT", FILE_TYPE_TXT, "text/plain");
addFileType("PPT", FILE_TYPE_PPT, "application/vnd.ms-powerpoint");
addFileType("PPTX", FILE_TYPE_PPTX, "application/vnd.openxmlformats-officedocument.presentationml.presentation");
addFileType("PDF", FILE_TYPE_PDF, "application/pdf");
// 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 isDocFileType(int fileType) {
return ((fileType >= FILE_TYPE_DOC &&
fileType <= FILE_TYPE_PDF));
}
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());
}
//根据视频文件路径判断文件类型
public boolean isVideoFileType(String path) {
MediaFileType type = getFileType(path);
if (null != type) {
return isVideoFileType(type.fileType);
}
return false;
}
//根据音频文件路径判断文件类型
public boolean isAudioFileType(String path) {
MediaFileType type = getFileType(path);
if (null != type) {
return isAudioFileType(type.fileType);
}
return false;
}
//根据图片文件路径判断文件类型
public boolean isImageFileType(String path) {
MediaFileType type = getFileType(path);
if (null != type) {
return isImageFileType(type.fileType);
}
return false;
}
//根据图片文件路径判断文件类型
public boolean isDocFileType(String path) {
MediaFileType type = getFileType(path);
if (null != type) {
return isDocFileType(type.fileType);
}
return false;
}
//根据mime类型查看文件类型
public static int getFileTypeForMimeType(String mimeType) {
Integer value = sMimeTypeMap.get(mimeType);
return (value == null ? 0 : value.intValue());
}
这个工具类 就可以根据文件路径进行文件类型的判断
2, 代码中引用
FileUtils.getInstance(MainActivity.this).isVideoFileType(currentFilePath);
根据返回值进行判断
