安卓：EPUB文件未显示在模拟器图像/ Android设备 [英] Android: Epub file not showing images in emulator/android device
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问题描述
我使用 http://www.siegmann.nl/epublib 阅读EPUB文件。我的code为如下所述。
{尝试
本书= epubReader.readEpub（新的FileInputStream（/ SD卡/ EpubTesting.epub））; 资源资源;
脊柱内容= book.getSpine（）; 清单＆LT; SpineReference＆GT; spinelist = contents.getSpineReferences（）;
StringBuilder的字符串=新的StringBuilder（）;
串线= NULL;
诠释计数= spinelist.size（）;
的for（int i = 0; I＆LT;计数;我++）{
RES = contents.getResource（I）
尝试{
InputStream为= res.getInputStream（）;
读者的BufferedReader =新的BufferedReader（新的InputStreamReader（是））; 尝试{
而（（行= reader.readLine（））！= NULL）{
。linez =（string.append（行+\\ n））的toString（）;
} }赶上（IOException异常五）{e.printStackTrace（）;}
}赶上（IOException异常五）{
e.printStackTrace（）;
}
}
的System.out.println（linez）;
s1.loadDataWithBaseURL（/ SD卡/，linez，text / html的，UTF-8，NULL）; }赶上（FileNotFoundException异常五）{ Toast.makeText（mContext，找不到文件，Toast.LENGTH_SHORT）.show（）;
}赶上（IOException异常五）{
Toast.makeText（mContext，IO异常，Toast.LENGTH_SHORT）.show（）;
}
也试过
s1.loadDataWithBaseURL（，linez，text / html的，UTF-8，NULL）;
s1.loadDataWithBaseURL（文件：// MNT / SD卡/，linez，text / html的，UTF-8，NULL）;
但结果是sifar。请告诉我，我必须做的，以显示文件中所包含的图像。我已经经历了常见问题解答说让 android.webkit.WebView 的子类，重载的使用loadURL（字符串）方法它加载从书而不是互联网上的图像的方式。但直到我没有在那里提取的文件我怎么能找到路径。请告诉我。我很迷茫。先谢谢了。
解决方案
公共类EpubBookContentActivity延伸活动{私有静态最后弦乐TAG =EpubBookContentActivity;
的WebView的WebView;书书;INT位置= 0;串线;
INT I = 0;
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.content）; 网页流量=（的WebView）findViewById（R.id.webView）;
webview.getSettings（）setJavaScriptEnabled（真）。 AssetManager assetManager = getAssets（）;
的String []文件; 尝试{ 文件= assetManager.list（书）;
清单＆LT;串GT;清单= Arrays.asList（文件）; 如果（！this.makeDirectory（书））{
调试（faild使书目录）;
} copyBookToDevice（list.get（位置））; 字符串基本路径= Environment.getExternalStorageDirectory（）+/书籍/; InputStream的epubInputStream = assetManager.open（书籍/+ list.get（位置））; 书=（新EpubReader（））readEpub（epubInputStream）。 DownloadResource（基本路径）; 串linez =;
脊柱的脊椎= book.getSpine（）;
清单＆LT; SpineReference＆GT; spineList = spine.getSpineReferences（）;
诠释计数= spineList.size（）; StringBuilder的字符串=新的StringBuilder（）;
的for（int i = 0;计数I标记;我++）{ 资源解析度= spine.getResource（I） 尝试{
InputStream为= res.getInputStream（）;
读者的BufferedReader =新的BufferedReader（新的InputStreamReader（是））;
尝试{
而（（行= reader.readLine（））！= NULL）{
。linez = string.append（行+\\ n）的toString（）;
} }赶上（IOException异常五）{e.printStackTrace（）;}
}赶上（IOException异常五）{
e.printStackTrace（）;
} } linez = linez.replace（../，）;//文件文件=新的文件（Environment.getExternalStorageDirectory（）的test.html）;
// file.createNewFile（）;
// FileOutputStream中的FileOutputStream =新的FileOutputStream（文件）;
// fileOutputStream.write（linez.getBytes（））;
// fileOutputStream.close（）;
webview.loadDataWithBaseURL（文件：//+ Environment.getExternalStorageDirectory（）+/书籍/，linez，text / html的，UTF-8，NULL）; }赶上（IOException异常五）{
Log.e（epublib异常，e.getMessage（））;
}
}公共布尔makeDirectory（字符串目录名）{
布尔水库; 字符串文件路径=新的String（Environment.getExternalStorageDirectory（）+/+目录名）; 调试（文件路径）;
档案文件=新的文件（文件路径）;
如果（！file.exists（））{
RES = file.mkdirs（）;
}其他{
RES = FALSE;
}
返回水库;
}公共无效调试（弦乐味精）{
//如果（Setting.isDebug（））{
Log.d（EPUB，味精）;
//}
}公共无效copyBookToDevice（字符串文件名）{
的System.out.println（复制簿中donwload在手机文件夹）;
尝试
{
InputStream的localInputStream = getAssets（）开（书籍/+文件名）。
字符串路径= Environment.getExternalStorageDirectory（）+/书籍/+文件名;
FileOutputStream中localFileOutputStream =新的FileOutputStream（路径）; 字节[] = arrayOfByte新的字节[1024];
INT抵消;
而（（偏移= localInputStream.read（arrayOfByte））大于0）
{
localFileOutputStream.write（arrayOfByte，0，偏移）;
}
localFileOutputStream.close（）;
localInputStream.close（）;
Log.d（TAG，文件名+复制到手机）; }
赶上（IOException异常localIOException）
{
localIOException.printStackTrace（）;
Log.d（TAG，无法复制）;
返回;
}
}私人无效DownloadResource（字符串目录）{
尝试{ 资源RST = book.getResources（）;
收集和LT;资源＆GT; clrst = rst.getAll（）;
迭代器＆LT;资源与GT; ITR = clrst.iterator（）; 而（itr.hasNext（））{
资源RS = itr.next（）; 如果（（rs.getMediaType（）== MediatypeService.JPG）
|| （rs.getMediaType（）== MediatypeService.PNG）
|| （rs.getMediaType（）== MediatypeService.GIF））{ Log.d（TAG，rs.getHref（））; 文件oppath1 =新的文件（目录，rs.getHref（）代替（OEBPS /，））; oppath1.getParentFile（）mkdirs（）。
oppath1.createNewFile（）; 的System.out.println（路径：+ oppath1.getParentFile（）getAbsolutePath（））;
FileOutputStream中fos1 =新的FileOutputStream（oppath1）;
fos1.write（rs.getData（））;
fos1.close（）; }否则如果（rs.getMediaType（）== MediatypeService.CSS）{ 文件oppath =新的文件（目录，rs.getHref（））; oppath.getParentFile（）mkdirs（）。
oppath.createNewFile（）; FOS的FileOutputStream =新的FileOutputStream（oppath）;
fos.write（rs.getData（））;
fos.close（）; } }
}赶上（例外五）{ }
}
}
I am using http://www.siegmann.nl/epublib to read epub file. My code is mentioned below.
try {
book = epubReader.readEpub(new FileInputStream("/sdcard/EpubTesting.epub"));
Resource res;
Spine contents = book.getSpine();
List<SpineReference> spinelist = contents.getSpineReferences();
StringBuilder string = new StringBuilder();
String line = null;
int count = spinelist.size();
for (int i=0;i<count;i++){
res = contents.getResource(i);
try {
InputStream is = res.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
try {
while ((line = reader.readLine()) != null) {
linez = (string.append(line+"\n")).toString();
}
} catch (IOException e) {e.printStackTrace();}
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println(linez);
s1.loadDataWithBaseURL("/sdcard/",linez, "text/html", "UTF-8",null);
}catch (FileNotFoundException e) {
Toast.makeText(mContext, "File not found.", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
Toast.makeText(mContext, "IO Exception.", Toast.LENGTH_SHORT).show();
}
Also tried
s1.loadDataWithBaseURL("",linez, "text/html", "UTF-8",null);
s1.loadDataWithBaseURL("file://mnt/sdcard/",linez, "text/html", "UTF-8",null);
But result is sifar. Please tell me what I have to do to show the contained images in file. I have gone through FAQ says Make a subclass of android.webkit.WebView that overloads the loadUrl(String) method in such a way that it loads the image from the Book instead of the internet. But till I don't where they extract the file how can I locate the path. Please tell me. I am very confused. Thanks in advance.
解决方案
public class EpubBookContentActivity extends Activity{
private static final String TAG = "EpubBookContentActivity";
WebView webview;
Book book;
int position = 0;
String line;
int i = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content);
webview = (WebView) findViewById(R.id.webView);
webview.getSettings().setJavaScriptEnabled(true);
AssetManager assetManager = getAssets();
String[] files;
try {
files = assetManager.list("books");
List<String> list =Arrays.asList(files);
if (!this.makeDirectory("books")) {
debug("faild to make books directory");
}
copyBookToDevice(list.get(position));
String basePath = Environment.getExternalStorageDirectory() + "/books/";
InputStream epubInputStream = assetManager.open("books/"+list.get(position));
book = (new EpubReader()).readEpub(epubInputStream);
DownloadResource(basePath);
String linez = "";
Spine spine = book.getSpine();
List<SpineReference> spineList = spine.getSpineReferences() ;
int count = spineList.size();
StringBuilder string = new StringBuilder();
for (int i = 0; count > i; i++) {
Resource res = spine.getResource(i);
try {
InputStream is = res.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
try {
while ((line = reader.readLine()) != null) {
linez = string.append(line + "\n").toString();
}
} catch (IOException e) {e.printStackTrace();}
} catch (IOException e) {
e.printStackTrace();
}
}
linez = linez.replace("../", "");
// File file = new File(Environment.getExternalStorageDirectory(),"test.html");
// file.createNewFile();
// FileOutputStream fileOutputStream = new FileOutputStream(file);
// fileOutputStream.write(linez.getBytes());
// fileOutputStream.close();
webview.loadDataWithBaseURL("file://"+Environment.getExternalStorageDirectory()+"/books/", linez, "text/html", "utf-8", null);
} catch (IOException e) {
Log.e("epublib exception", e.getMessage());
}
}
public boolean makeDirectory(String dirName) {
boolean res;
String filePath = new String(Environment.getExternalStorageDirectory()+"/"+dirName);
debug(filePath);
File file = new File(filePath);
if (!file.exists()) {
res = file.mkdirs();
}else {
res = false;
}
return res;
}
public void debug(String msg) {
// if (Setting.isDebug()) {
Log.d("EPub", msg);
// }
}
public void copyBookToDevice(String fileName) {
System.out.println("Copy Book to donwload folder in phone");
try
{
InputStream localInputStream = getAssets().open("books/"+fileName);
String path = Environment.getExternalStorageDirectory() + "/books/"+fileName;
FileOutputStream localFileOutputStream = new FileOutputStream(path);
byte[] arrayOfByte = new byte[1024];
int offset;
while ((offset = localInputStream.read(arrayOfByte))>0)
{
localFileOutputStream.write(arrayOfByte, 0, offset);
}
localFileOutputStream.close();
localInputStream.close();
Log.d(TAG, fileName+" copied to phone");
}
catch (IOException localIOException)
{
localIOException.printStackTrace();
Log.d(TAG, "failed to copy");
return;
}
}
private void DownloadResource(String directory) {
try {
Resources rst = book.getResources();
Collection<Resource> clrst = rst.getAll();
Iterator<Resource> itr = clrst.iterator();
while (itr.hasNext()) {
Resource rs = itr.next();
if ((rs.getMediaType() == MediatypeService.JPG)
|| (rs.getMediaType() == MediatypeService.PNG)
|| (rs.getMediaType() == MediatypeService.GIF)) {
Log.d(TAG, rs.getHref());
File oppath1 = new File(directory, rs.getHref().replace("OEBPS/", ""));
oppath1.getParentFile().mkdirs();
oppath1.createNewFile();
System.out.println("Path : "+oppath1.getParentFile().getAbsolutePath());
FileOutputStream fos1 = new FileOutputStream(oppath1);
fos1.write(rs.getData());
fos1.close();
} else if (rs.getMediaType() == MediatypeService.CSS) {
File oppath = new File(directory, rs.getHref());
oppath.getParentFile().mkdirs();
oppath.createNewFile();
FileOutputStream fos = new FileOutputStream(oppath);
fos.write(rs.getData());
fos.close();
}
}
} catch (Exception e) {
}
}
}
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