smilevchy
5/23/2015 - 1:43 PM
FileUtil.java
public class FileUtil {
private static FileUtil instance = null;
private static List<ExtIcon> extIconList = null;
private int[] icons = { R.drawable.ext_xls, R.drawable.cd_big_img_1,
R.drawable.ext_audio, R.drawable.ext_video,
R.drawable.ext_ppt, R.drawable.ext_rar,
R.drawable.ext_default, R.drawable.ext_doc,
R.drawable.ext_pdf, R.drawable.ext_txt,
R.drawable.ext_grid, R.drawable.ext_csv,
R.drawable.ext_vcf
};
private String[][] exts = { {".xls", ".xlsx"}, {".png", ".jpg", ".bmp", ".gif", ".jpeg", ".tnf", ".icon"},
{".mp3"}, {".mpeg", ".mpg", ".gp3", ".swf", ".flv", ".rm", ".rmvb", ".wma", ".wmv", ".asf"},
{".ppt", ".pptx"}, {".rar", ".zip", ".jar", ".war"},
{".ini", ".html", ".xml", ".htm", ".js", ".properties", ".c", ".cpp", ".java", ".log"}, {".doc", ".doct", ".docx"},
{".pdf"}, {".txt"},
{".grid"}, {".csv"},
{".vcf"}
};
private String[] imgExts = {".png", ".jpg", ".bmp", ".gif", ".jpeg", ".tnf", ".icon"};
private static final String[][] MIME_MapTable={
//{后缀名，MIME类型}
{".3gp", "video/3gpp"},
{".apk", "application/vnd.android.package-archive"},
{".asf", "video/x-ms-asf"},
{".avi", "video/x-msvideo"},
{".bin", "application/octet-stream"},
{".bmp", "image/bmp"},
{".c", "text/plain"},
{".class", "application/octet-stream"},
{".conf", "text/plain"},
{".cpp", "text/plain"},
{".doc", "application/msword"},
{".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
{".xls", "application/vnd.ms-excel"},
{".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
{".exe", "application/octet-stream"},
{".gif", "image/gif"},
{".gtar", "application/x-gtar"},
{".gz", "application/x-gzip"},
{".h", "text/plain"},
{".htm", "text/html"},
{".html", "text/html"},
{".jar", "application/java-archive"},
{".java", "text/plain"},
{".jpeg", "image/jpeg"},
{".jpg", "image/jpeg"},
{".js", "application/x-javascript"},
{".log", "text/plain"},
{".m3u", "audio/x-mpegurl"},
{".m4a", "audio/mp4a-latm"},
{".m4b", "audio/mp4a-latm"},
{".m4p", "audio/mp4a-latm"},
{".m4u", "video/vnd.mpegurl"},
{".m4v", "video/x-m4v"},
{".mov", "video/quicktime"},
{".mp2", "audio/x-mpeg"},
{".mp3", "audio/x-mpeg"},
{".mp4", "video/mp4"},
{".mpc", "application/vnd.mpohun.certificate"},
{".mpe", "video/mpeg"},
{".mpeg", "video/mpeg"},
{".mpg", "video/mpeg"},
{".mpg4", "video/mp4"},
{".mpga", "audio/mpeg"},
{".msg", "application/vnd.ms-outlook"},
{".ogg", "audio/ogg"},
{".pdf", "application/pdf"},
{".png", "image/png"},
{".pps", "application/vnd.ms-powerpoint"},
{".ppt", "application/vnd.ms-powerpoint"},
{".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
{".prop", "text/plain"},
{".rc", "text/plain"},
{".rmvb", "audio/x-pn-realaudio"},
{".rtf", "application/rtf"},
{".sh", "text/plain"},
{".tar", "application/x-tar"},
{".tgz", "application/x-compressed"},
{".txt", "text/plain"},
{".wav", "audio/x-wav"},
{".wma", "audio/x-ms-wma"},
{".wmv", "audio/x-ms-wmv"},
{".wps", "application/vnd.ms-works"},
{".xml", "text/plain"},
{".z", "application/x-compress"},
{".zip", "application/x-zip-compressed"},
{"", "*/*"}
};
private FileUtil() {
}
public static FileUtil getInstance() {
if (null == instance) {
instance = new FileUtil();
}
return instance;
}
public boolean isImage(String ext) {
if(null == ext || "".equals(ext.trim())){
return false;
}
ext = ext.trim().toLowerCase();
for(String str : imgExts){
if(ext.equals(str)){
return true;
}
}
return false;
}
/**
* 加载非图片类型文件的缩略图
* @param ext 文件扩展名
* @param imageView 图像对象
*/
public void loadThumbnailByExt(final String ext, final ImageView imageView) {
if (null == imageView) {
throw new RuntimeException("imageView is null !");
}
Resources res = imageView.getResources();
if (null == ext || "".equals(ext.trim())){
imageView.setImageDrawable(res.getDrawable(R.drawable.ext_default));
}
if (null == extIconList) {
initExtIconList();
}
boolean find = false;
for (ExtIcon e : extIconList) {
String[] extArray = e.getExt();
for(String s : extArray) {
if (s.equals(ext)) {
imageView.setImageDrawable(res.getDrawable(e.getIcon()));
find = true;
break;
}
}
if (find) {
break;
}
}
if (!find) {
imageView.setImageDrawable(res.getDrawable(R.drawable.ext_default));
}
}
/**
* 打开本地文件
* @param file 本地文件对象
* @param context 上下文对象
*/
public void openLocalFile(File file, Context context) {
Intent intent = new Intent();
//设置intent的Action属性
intent.setAction(Intent.ACTION_VIEW);
//获取文件file的MIME类型
String type = getMIMEType(file.getName(), "");
//设置intent的data和Type属性。
intent.setDataAndType(Uri.fromFile(file), type);
//跳转
context.startActivity(intent);
}
/**
* 获取某一文件类型对应的MIME类型
* @param fileName 文件名称
* @param defaultType 默认MIME类型
* @return 文件的MIME类型
*/
public String getMIMEType(String fileName, String defaultType) {
String type = defaultType;
//获取后缀名前的分隔符"."在fName中的位置。
int dotIndex = fileName.lastIndexOf(".");
if (dotIndex < 0) {
return type;
}
/* 获取文件的后缀名*/
String end = fileName.substring(dotIndex,fileName.length()).toLowerCase();
if (TextUtils.isEmpty(end)) {
return type;
}
//在MIME和文件类型的匹配表中找到对应的MIME类型。
for (int i = 0; i < MIME_MapTable.length; i++) {
if (end.equals(MIME_MapTable[i][0])) {
type = MIME_MapTable[i][1];
}
}
return type;
}
/**
* 获取文件后缀名
* @param path 文件路径名
* @return 文件后缀名
*/
public String getExt(String path) {
if(null == path || "".equals(path.trim())){
return null;
}
String ext = null;
int index = path.lastIndexOf(".");
if(0 < index){
ext = path.substring(index);
}
return ext;
}
private void initExtIconList() {
extIconList = new ArrayList<ExtIcon>();
for (int i = 0, s = icons.length; i < s; i++) {
ExtIcon extIcon = new ExtIcon();
extIcon.setIcon(icons[i]);
extIcon.setExt(exts[i]);
extIconList.add(extIcon);
}
}
private class ExtIcon {
int icon ;
String[] ext ;
public int getIcon() {
return icon;
}
public void setIcon(int icon) {
this.icon = icon;
}
public String[] getExt() {
return ext;
}
public void setExt(String[] ext) {
this.ext = ext;
}
}
}