Android Utililty Methods File Extension Name Get

List of utility methods to do File Extension Name Get

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Description

The list of methods to do File Extension Name Get are organized into topic(s).

Method

StringgetFileExtension(String file)
get File Extension 
String extension = "";
String fileName = new File(file).getName();
int idxOfDot = fileName.lastIndexOf('.');
if (idxOfDot != -1) {
    extension = fileName.substring(idxOfDot + 1);
return extension;
StringgetFileExtension(String fileName)
get File Extension 
int index = fileName.lastIndexOf(".");
if (index == -1)
    return null;
return fileName.substring(index + 1);
StringgetFileExtension(String filename)
get File Extension 
return getFileExtension(filename, "");
StringgetFileExtension(String filename, String defExt)
get File Extension 
if (filename == null || filename.length() == 0)
    return defExt;
int pos = filename.lastIndexOf('.');
if (pos >= 0) {
    return filename.substring(pos + 1);
return defExt;
StringgetFileExtensionFromName(String filename)
get File Extension From Name 
if (filename == null) {
    return null;
int index = indexOfExtension(filename);
if (index == -1) {
    return "";
} else {
    return filename.substring(index + 1);
...
StringgetFileExtensionFromSource(byte[] picHeader)
get File Extension From Source 
String picExtendName = null;
if (picHeader.length >= 2 && (picHeader[0] == 66)
        && (picHeader[1] == 77)) {
    picExtendName = "BMP";
} else if (picHeader.length >= 4 && (picHeader[1] == 80)
        && (picHeader[2] == 78) && (picHeader[3] == 71)) {
    picExtendName = "PNG";
} else if (picHeader.length >= 6 && (picHeader[0] == 71)
...
StringgetFileExtensionFromUrl(String url)
Returns the file extension or an empty string if there is no extension. 
if (url != null && url.length() > 0) {
    int query = url.lastIndexOf('?');
    if (query > 0) {
        url = url.substring(0, query);
    int filenamePos = url.lastIndexOf('/');
    String filename = 0 <= filenamePos ? url
            .substring(filenamePos + 1) : url;
...
StringgetFilenameExtension(String path)
get Filename Extension 
if (path == null) {
    return null;
int extIndex = path.lastIndexOf(EXTENSION_SEPARATOR);
if (extIndex == -1) {
    return null;
int folderIndex = path.lastIndexOf(FOLDER_SEPARATOR);
...
StringgetNameMinusExtension(File file)
Returns the file's name minus any extension, that is, the part of its name up to (but not including) the last '.' 
Check.arg().notNull(file);
String name = file.getName();
int indexPeriod = name.lastIndexOf('.');
if (indexPeriod == -1)
    return name;
else
    return name.substring(0, indexPeriod);
StringgetPathExtension(final String path)
Returns extension of path without ".". 
String result = null;
if (path != null) {
    result = "";
    if (path.lastIndexOf('.') != -1) {
        result = path.substring(path.lastIndexOf('.'));
        if (result.startsWith(".")) {
            result = result.substring(1);
return result;