138 lines
4.0 KiB
Plaintext
138 lines
4.0 KiB
Plaintext
package com.novelbook.android.utils;
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import android.content.Context;
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import android.os.Environment;
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import org.mozilla.universalchardet.UniversalDetector;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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public class FileUtils {
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/**
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* 获取文件编码
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* @param fileName
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* @return
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* @throws IOException
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*/
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public static String getCharset(String fileName) throws IOException{
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String charset;
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FileInputStream fis = new FileInputStream(fileName);
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byte[] buf = new byte[4096];
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// (1)
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UniversalDetector detector = new UniversalDetector(null);
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// (2)
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int nread;
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while ((nread = fis.read(buf)) > 0 && !detector.isDone()) {
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detector.handleData(buf, 0, nread);
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}
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// (3)
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detector.dataEnd();
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// (4)
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charset = detector.getDetectedCharset();
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// (5)
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detector.reset();
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return charset;
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}
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/**
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* 根据路径获取文件名
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* @param pathandname
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* @return
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*/
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public static String getFileName(String pathandname){
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int start=pathandname.lastIndexOf("/");
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int end=pathandname.lastIndexOf(".");
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if(start!=-1 && end!=-1){
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return pathandname.substring(start+1,end);
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}else{
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return "";
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}
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}
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public static List<File> getSuffixFile(String filePath, String suffere){
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List<File> files = new ArrayList<>();
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File f = new File(filePath);
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return getSuffixFile(files,f,suffere);
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}
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/**
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* 读取sd卡上指定后缀的所有文件
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* @param files 返回的所有文件
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* @param f 路径(可传入sd卡路径)
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* @param suffere 后缀名称 比如 .gif
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* @return
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*/
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public static List<File> getSuffixFile(List<File> files, File f, final String suffere) {
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if (!f.exists()) {
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return null;
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}
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File[] subFiles = f.listFiles();
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for (File subFile : subFiles) {
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if (subFile.isHidden()){
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continue;
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}
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if(subFile.isDirectory()){
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getSuffixFile(files, subFile, suffere);
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}else if(subFile.getName().endsWith(suffere)){
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files.add(subFile);
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} else{
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//非指定目录文件 不做处理
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}
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// Log.e("filename",subFile.getName());
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}
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return files;
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}
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public static String getDiskCacheDir(Context context) {
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String cachePath = null;
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if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())
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|| !Environment.isExternalStorageRemovable()) {
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cachePath = context.getExternalCacheDir().getPath();
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} else {
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cachePath = context.getCacheDir().getPath();
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}
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return cachePath;
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}
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public static File getNovelDir(int noveId){
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File f = new File(BookUtil.chapterPath+noveId);
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return f;
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}
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public static void clearChapterCache(int novelId) {
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Fileutil.deleteDir(getNovelDir(novelId));
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}
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public static String getCacheSizeK(int noveId) {
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float size = getCacheSize( noveId) ;
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size = size/1024.00f;
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if(size >1024){
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size = size/1024.00f;
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return String.format("%.1fM",size);
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}
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return String.format("%.1fK",size);
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}
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public static long getCacheSize(int noveId) {
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return Fileutil.getDirSize(getNovelDir(noveId));
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}
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public static String getFormatedCachedSize(){
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File f = new File(BookUtil.chapterPath);
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return Fileutil.formatFileSize(Fileutil.getDirSize(f));
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}
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public static long getCachedSize2(){
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File f = new File(BookUtil.chapterPath);
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return Fileutil.getDirSize(f) ;
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}
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public static void clearCache(){
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File f = new File(BookUtil.chapterPath);
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Fileutil.deleteDir(f);
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}
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}
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