1、在main文件夹下创建assets文件夹

2、assets文件夹下可创建image文件夹，text文件夹，image文件夹下存放jpg或png图片。text文件夹下存放.txt文本

3、读取assets文件内容：

entity类：

public class Book {private static final String TAG = "Book";private String mBookTitle;private Bitmap mBookCover;//格式化文本，将文本以段落为单位保存private List<String> mParagraphList;//目录集合(卷/章/回/集等)private List<String> mBookContents;//目录对应的在段落集合中的索引private List<Integer> mContentParaIndexs;//空两格private String mSpace = "\t\t\t\t\t\t";public Book(String bookTitle, Bitmap bookCover, String fullText) {mParagraphList = new ArrayList<>();mBookContents = new ArrayList<>();mContentParaIndexs=new ArrayList<>();mBookTitle = bookTitle;mBookCover = bookCover;formatText(fullText);findContents(mParagraphList);}//格式化文本，将文本以段落为单位保存private void formatText(String text) {boolean isFirstParas = true;String paragraph = "";//按段落切分文本String[] paragraphs = text.split("\\s{2,}");//格式化段落for (int i = 0; i < paragraphs.length; i++) {if (paragraphs[i].isEmpty()) {continue;}if (isFirstParas) {paragraph = mSpace + paragraphs[i];isFirstParas = false;} else {paragraph = "\n" + mSpace + paragraphs[i];}mParagraphList.add(paragraph);}}private void findContents(List<String> paraList) {//字符串匹配模式String patternString = "第\\S{2,4}\\s\\S{2,}";Pattern pattern = Pattern.compile(patternString);for (String para:paraList) {Matcher matcher = pattern.matcher(para);if (matcher.find()){//除去段首多余空格int start = matcher.start();int end = matcher.end();String subString = para.substring(start, end);mBookContents.add(subString);   //目录mContentParaIndexs.add(paraList.indexOf(para)); //目录对应的在段落集合中的索引}}}public String getBookTitle() {return mBookTitle;}public Bitmap getBookCover() {return mBookCover;}public List<String> getParagraphList() {return mParagraphList;}public List<String> getBookContents() {return mBookContents;}public List<Integer> getContentParaIndexs() {return mContentParaIndexs;}
}

 

加载类：

public class BookLab {public static final String TEXT = "text";public static final String IMAGE = "image";private static BookLab sBookLab;private AssetManager mAssetManager;private List<Book> mBookList;//assets中的文件名清单private String[] mAssetsImageList;private String[] mAssetsTextList;private BookLab(Context context) {mAssetManager = context.getAssets();loadAssetsFiles();}public static BookLab newInstance(Context context) {if (sBookLab == null) {sBookLab = new BookLab(context);}return sBookLab;}//加载assets中的文件private void loadAssetsFiles() {mBookList = new ArrayList<>();//获取image、text中的文件名清单try {mAssetsImageList = mAssetManager.list(IMAGE);mAssetsTextList = mAssetManager.list(TEXT);} catch (IOException e) {e.printStackTrace();}for (int i = 0; i < mAssetsTextList.length; i++) {//获取书名String[] nameSplit = mAssetsTextList[i].split("_");String nameSecond = nameSplit[nameSplit.length - 1];String bookTitle = nameSecond.replace(".txt", "");//获取封面String imagePath = IMAGE + "/" + mAssetsImageList[i];Bitmap bookCover = loadImage(imagePath);//获取文本String textPath = TEXT + "/" + mAssetsTextList[i];String bodyText = loadText(textPath);Book book = new Book(bookTitle, bookCover, bodyText);mBookList.add(book);}}//从assets中读取文本private String loadText(String path) {InputStream in = null;BufferedReader reader = null;StringBuilder stringBuilder = new StringBuilder();try {in = mAssetManager.open(path);reader = new BufferedReader(new InputStreamReader(in));String line = "";while ((line = reader.readLine()) != null) {stringBuilder.append(line);}} catch (IOException e) {e.printStackTrace();} finally {if (reader != null) {try {reader.close();} catch (IOException e) {e.printStackTrace();}}}return stringBuilder.toString();}//从assets中读取图片private Bitmap loadImage(String path) {Bitmap image = null;InputStream in = null;try {in = mAssetManager.open(path);image = BitmapFactory.decodeStream(in);} catch (IOException e) {e.printStackTrace();} finally {try {in.close();} catch (IOException e) {e.printStackTrace();}}return image;}public List<Book> getBookList() {return mBookList;}
}

activity读取数据：

private List<Book> mBookList;

mBookList = BookLab.newInstance(this).getBookList();