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优化本地书籍阅读

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pull/5/head
fengyuecanzhu 4 years ago
parent 7ee3566024
commit 0431e4b49a
3 changed files with 5 additions and 221 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 23
      app/src/main/java/xyz/fycz/myreader/util/utils/Charset.java
  2. 3
      app/src/main/java/xyz/fycz/myreader/util/utils/FileUtils.java
  3. 200
      app/src/main/java/xyz/fycz/myreader/widget/page/LocalPageLoader.java

23
app/src/main/java/xyz/fycz/myreader/util/utils/Charset.java
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@ -1,23 +0,0 @@
package xyz.fycz.myreader.util.utils;
/**
* 编码类型
*/
public enum Charset {
UTF8("UTF-8"),
UNICODE("Unicode"),
UTF16LE("UTF-16LE"),
UTF16BE("UTF-16BE"),
GBK("GBK");
private String mName;
public static final byte BLANK = 0x0a;
private Charset(String name) {
mName = name;
}
public String getName() {
return mName;
}
}

3
app/src/main/java/xyz/fycz/myreader/util/utils/FileUtils.java
Unescape View File

@ -45,7 +45,7 @@ public class FileUtils {
public static final String SUFFIX_TXT = ".txt";
public static final String SUFFIX_EPUB = ".epub";
public static final String SUFFIX_PDF = ".pdf";
public static final byte BLANK = 0x0a;
//获取文件夹
public static File getFolder(String filePath){
File file = new File(filePath);
@ -240,6 +240,7 @@ public class FileUtils {
temFile = getFile(APPCONST.TEM_FILE_DIR + "tem.fy");
fis = new FileInputStream(file);
fos = new FileOutputStream(temFile);
//用10kb作为试探
byte[] bytes = new byte[1024 * 10];
int len;
if ((len = fis.read(bytes)) != -1){

200
app/src/main/java/xyz/fycz/myreader/widget/page/LocalPageLoader.java
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@ -11,7 +11,6 @@ import xyz.fycz.myreader.greendao.entity.Chapter;
import xyz.fycz.myreader.greendao.service.ChapterService;
import xyz.fycz.myreader.util.IOUtils;
import xyz.fycz.myreader.util.StringHelper;
import xyz.fycz.myreader.util.utils.Charset;
import xyz.fycz.myreader.util.utils.FileUtils;
import xyz.fycz.myreader.util.utils.RxUtils;
@ -21,6 +20,8 @@ import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import static xyz.fycz.myreader.util.utils.FileUtils.BLANK;
/**
* Created by newbiechen on 17-7-1.
* 问题:
@ -62,201 +63,6 @@ public class LocalPageLoader extends PageLoader {
this.mChapterService = mChapterService;
}
/*private List<BookChapterBean> convertTxtChapter(List<BookChapterBean> bookChapters) {
List<BookChapterBean> txtChapters = new ArrayList<>(bookChapters.size());
for (BookChapterBean bean : bookChapters) {
BookChapterBean chapter = new BookChapterBean();
chapter.title = bean.getTitle();
chapter.start = bean.getStart();
chapter.end = bean.getEnd();
txtChapters.add(chapter);
}
return txtChapters;
}*/
/**
* 未完成的部分:
* 1. 序章的添加
* 2. 章节存在的书本的虚拟分章效果
*/
/*public List<Chapter> loadChapters() throws IOException {
mBookFile = new File(mCollBook.getChapterUrl());
//获取文件编码
mCharset = FileUtils.getFileEncode(mBookFile.getAbsolutePath());
List<Chapter> chapters = new ArrayList<>();
RandomAccessFile bookStream = null;
boolean hasChapter = false;
//获取文件流
bookStream = new RandomAccessFile(mBookFile, "r");
//寻找匹配文章标题的正则表达式，判断是否存在章节名
hasChapter = checkChapterType(bookStream);
//加载章节
byte[] buffer = new byte[BUFFER_SIZE];
//获取到的块起始点，在文件中的位置
long curOffset = 0;
//block的个数
int blockPos = 0;
//读取的长度
int length;
//获取文件中的数据到buffer，直到没有数据为止
while ((length = bookStream.read(buffer, 0, buffer.length)) > 0) {
++blockPos;
//如果存在Chapter
if (hasChapter) {
//将数据转换成String
String blockContent = new String(buffer, 0, length, mCharset);
//当前Block下使过的String的指针
int seekPos = 0;
//进行正则匹配
Matcher matcher = mChapterPattern.matcher(blockContent);
//如果存在相应章节
while (matcher.find()) {
//获取匹配到的字符在字符串中的起始位置
int chapterStart = matcher.start();
//如果 seekPos == 0 && nextChapterPos != 0 表示当前block处前面有一段内容
//第一种情况一定是序章 第二种情况可能是上一个章节的内容
if (seekPos == 0 && chapterStart != 0) {
//获取当前章节的内容
String chapterContent = blockContent.substring(seekPos, chapterStart);
//设置指针偏移
seekPos += chapterContent.length();
//如果当前对整个文件的偏移位置为0的话，那么就是序章
if (curOffset == 0) {
//创建序章
Chapter preChapter = new Chapter();
preChapter.setTitle("序章");
preChapter.setStart(0);
preChapter.setEnd(chapterContent.getBytes(mCharset).length); //获取String的byte值,作为最终值
//如果序章大小大于30才添加进去
if (preChapter.getEnd() - preChapter.getStart() > 30) {
chapters.add(preChapter);
}
//创建当前章节
Chapter curChapter = new Chapter();
curChapter.setTitle(matcher.group());
curChapter.setStart(preChapter.getEnd());
chapters.add(curChapter);
}
//否则就block分割之后，上一个章节的剩余内容
else {
//获取上一章节
Chapter lastChapter = chapters.get(chapters.size() - 1);
//将当前段落添加上一章去
lastChapter.setEnd(lastChapter.getEnd() + chapterContent.getBytes(mCharset).length);
//如果章节内容太小，则移除
if (lastChapter.getEnd() - lastChapter.getStart() < 30) {
chapters.remove(lastChapter);
}
//创建当前章节
Chapter curChapter = new Chapter();
curChapter.setTitle(matcher.group());
curChapter.setStart(lastChapter.getEnd());
chapters.add(curChapter);
}
} else {
//是否存在章节
if (chapters.size() != 0) {
//获取章节内容
String chapterContent = blockContent.substring(seekPos, matcher.start());
seekPos += chapterContent.length();
//获取上一章节
Chapter lastChapter = chapters.get(chapters.size() - 1);
lastChapter.setEnd(lastChapter.getStart() + chapterContent.getBytes(mCharset).length);
//如果章节内容太小，则移除
if (lastChapter.getEnd() - lastChapter.getStart() < 30) {
chapters.remove(lastChapter);
}
//创建当前章节
Chapter curChapter = new Chapter();
curChapter.setTitle(matcher.group());
curChapter.setStart(lastChapter.getEnd());
chapters.add(curChapter);
}
//如果章节不存在则创建章节
else {
Chapter curChapter = new Chapter();
curChapter.setTitle(matcher.group());
curChapter.setStart(0);
chapters.add(curChapter);
}
}
}
}
//进行本地虚拟分章
else {
//章节在buffer的偏移量
int chapterOffset = 0;
//当前剩余可分配的长度
int strLength = length;
//分章的位置
int chapterPos = 0;
while (strLength > 0) {
++chapterPos;
//是否长度超过一章
if (strLength > MAX_LENGTH_WITH_NO_CHAPTER) {
//在buffer中一章的终止点
int end = length;
//寻找换行符作为终止点
for (int i = chapterOffset + MAX_LENGTH_WITH_NO_CHAPTER; i < length; ++i) {
if (buffer[i] == Charset.BLANK) {
end = i;
break;
}
}
Chapter chapter = new Chapter();
chapter.setTitle("第" + blockPos + "章" + "(" + chapterPos + ")");
chapter.setStart(curOffset + chapterOffset + 1);
chapter.setEnd(curOffset + end);
chapters.add(chapter);
//减去已经被分配的长度
strLength = strLength - (end - chapterOffset);
//设置偏移的位置
chapterOffset = end;
} else {
Chapter chapter = new Chapter();
chapter.setTitle("第" + blockPos + "章" + "(" + chapterPos + ")");
chapter.setStart(curOffset + chapterOffset + 1);
chapter.setEnd(curOffset + length);
chapters.add(chapter);
strLength = 0;
}
}
}
//block的偏移点
curOffset += length;
if (hasChapter) {
//设置上一章的结尾
Chapter lastChapter = chapters.get(chapters.size() - 1);
lastChapter.setEnd(curOffset);
}
//当添加的block太多的时候，执行GC
if (blockPos % 15 == 0) {
System.gc();
System.runFinalization();
}
}
IOUtils.close(bookStream);
System.gc();
System.runFinalization();
return chapters;
}*/
/**
* 未完成的部分:
* 1. 序章的添加
@ -390,7 +196,7 @@ public class LocalPageLoader extends PageLoader {
int end = length;
//寻找换行符作为终止点
for (int i = chapterOffset + MAX_LENGTH_WITH_NO_CHAPTER; i < length; ++i) {
if (buffer[i] == Charset.BLANK) {
if (buffer[i] == BLANK) {
end = i;
break;
}

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