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Android PDF Viewer library [closed]

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I know this question has been asked many times but it's still unclear for me if there is an existing and properly working library to natively display PDF documents.
I only want to view a PDF document which is stored inside my app. Opening a new Activity is ok for me, I don't need to display it inside an existing view. I've already built a piece of code to launch an activity intent for reading my local PDF file, but of course, if no PDF Viewer app is already installed on the device, then nothing happens.
I've heard about APV, VuDroid, droidreader, etc but it seems that they all are APKs, not libraries that can be used inside my app code.
So, is there any real Android library to achieve this?
Thanks in advance.

This one you can try it which works in offline mode
https://github.com/bitfield66/PdfViewerAndroid_Offline
which just accepts pdf path.

Firstly to view a pdf in android you have to convert the pdf into images then display them to the user. (i am going to use a webview)
So to do this we need this library. It is my edited version of this git.
After you have imported the library into your project you need to create your activity.
The XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="#+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
The java onCreate:
//Imports:
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.view.ViewTreeObserver;
import android.webkit.WebView;
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFImage;
import com.sun.pdfview.PDFPage;
import com.sun.pdfview.PDFPaint;
import net.sf.andpdf.nio.ByteBuffer;
import net.sf.andpdf.refs.HardReference;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
//Globals:
private WebView wv;
private int ViewSize = 0;
//OnCreate Method:
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Settings
PDFImage.sShowImages = true; // show images
PDFPaint.s_doAntiAlias = true; // make text smooth
HardReference.sKeepCaches = true; // save images in cache
//Setup webview
wv = (WebView)findViewById(R.id.webView1);
wv.getSettings().setBuiltInZoomControls(true);//show zoom buttons
wv.getSettings().setSupportZoom(true);//allow zoom
//get the width of the webview
wv.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener()
{
#Override
public void onGlobalLayout()
{
ViewSize = wv.getWidth();
wv.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
});
pdfLoadImages();//load images
}
Load Images:
private void pdfLoadImages()
{
try
{
// run async
new AsyncTask<Void, Void, Void>()
{
// create and show a progress dialog
ProgressDialog progressDialog = ProgressDialog.show(MainActivity.this, "", "Opening...");
#Override
protected void onPostExecute(Void result)
{
//after async close progress dialog
progressDialog.dismiss();
}
#Override
protected Void doInBackground(Void... params)
{
try
{
// select a document and get bytes
File file = new File(Environment.getExternalStorageDirectory().getPath()+"/randompdf.pdf");
RandomAccessFile raf = new RandomAccessFile(file, "r");
FileChannel channel = raf.getChannel();
ByteBuffer bb = ByteBuffer.NEW(channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size()));
raf.close();
// create a pdf doc
PDFFile pdf = new PDFFile(bb);
//Get the first page from the pdf doc
PDFPage PDFpage = pdf.getPage(1, true);
//create a scaling value according to the WebView Width
final float scale = ViewSize / PDFpage.getWidth() * 0.95f;
//convert the page into a bitmap with a scaling value
Bitmap page = PDFpage.getImage((int)(PDFpage.getWidth() * scale), (int)(PDFpage.getHeight() * scale), null, true, true);
//save the bitmap to a byte array
ByteArrayOutputStream stream = new ByteArrayOutputStream();
page.compress(Bitmap.CompressFormat.PNG, 100, stream);
stream.close();
byte[] byteArray = stream.toByteArray();
//convert the byte array to a base64 string
String base64 = Base64.encodeToString(byteArray, Base64.DEFAULT);
//create the html + add the first image to the html
String html = "<!DOCTYPE html><html><body bgcolor=\"#7f7f7f\"><img src=\"data:image/png;base64,"+base64+"\" hspace=10 vspace=10><br>";
//loop through the rest of the pages and repeat the above
for(int i = 2; i <= pdf.getNumPages(); i++)
{
PDFpage = pdf.getPage(i, true);
page = PDFpage.getImage((int)(PDFpage.getWidth() * scale), (int)(PDFpage.getHeight() * scale), null, true, true);
stream = new ByteArrayOutputStream();
page.compress(Bitmap.CompressFormat.PNG, 100, stream);
stream.close();
byteArray = stream.toByteArray();
base64 = Base64.encodeToString(byteArray, Base64.DEFAULT);
html += "<img src=\"data:image/png;base64,"+base64+"\" hspace=10 vspace=10><br>";
}
html += "</body></html>";
//load the html in the webview
wv.loadDataWithBaseURL("", html, "text/html","UTF-8", "");
}
catch (Exception e)
{
Log.d("CounterA", e.toString());
}
return null;
}
}.execute();
System.gc();// run GC
}
catch (Exception e)
{
Log.d("error", e.toString());
}
}

I like the MuPDF Adnroid lib since it written in C++/NDK and it has unique features like clickable images (I mean an URL linked to the image) - met no other lib with this feature and I was really need it.
You actually can open PDF using no lib at all: using WebView via google docs but I don't like this way due to IC is required all the time while using MuPDF I can DL pdf file and freely open it offline any time. Also WebView way is more "hard" for device meaning battery draining + lags + CPU heating and it uses more trafic (if compared to DL&show way).

XML Parsing and showing the result in a list view

I am using the following code by the Android-people-XMLParsing example for parsing XML file and it is working perfectly fine..
but it retrieve the data in TextView i want to put this data in a ListView..
I tried by creating CustomAdapter and by changing the Activity into the ListActivity..but nothing works..i can see only a blank screen..Can anyone help me to do this...
Thanks!!
package com.androidpeople.xml.parsing;
import java.net.URL;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;
public class XMLParsingExample extends Activity {
/** Create Object For markerList Class */
mymarkers markerList =null;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/** Create a new layout to display the view */
LinearLayout layout = new LinearLayout(this);
layout.setOrientation(1);
/** Create a new textview array to display the results */
TextView name[];
TextView address[];
TextView city[];
try {
/** Handling XML */
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
/** Send URL to parse XML Tags */
URL sourceUrl = new URL("xxxxxxxxx");
/** Create handler to handle XML Tags ( extends DefaultHandler ) */
MyXMLHandler myXMLHandler = new MyXMLHandler();
xr.setContentHandler(myXMLHandler);
xr.parse(new InputSource(sourceUrl.openStream()));
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
/** Get result from MyXMLHandler SitlesList Object */
markerList = MyXMLHandler.markerList;
/** Assign textview array lenght by arraylist size */
name = new TextView[markerList.getName().size()];
address = new TextView[markerList.getaddress().size()];
city = new TextView[markerList.getCity().size()];
/** Set the result text in textview and add it to layout */
for (int i = 0; i < markerList.getName().size(); i++) {
name[i] = new TextView(this);
name[i].setText("Name = "+markerList.getName().get(i));
address[i] = new TextView(this);
address[i].setText("address = "+markerList.getaddress().get(i));
city[i] = new TextView(this);
city[i].setText("city = "+markerList.getCity().get(i));
System.out.println("count33..."+markerList.getCity().size());
city[i].setBackgroundColor(Color.WHITE);
layout.addView(name[i]);
layout.addView(address[i]);
layout.addView(city[i]);
//layout.addView(border[i]);
}
/** Set the layout view to display */
setContentView(layout);
}
}

I've answered a very similar question few days back that you might want to check. You could check the question Android: Sax parsing to a listview and check the accepted answer. Follow the instruction until getView() part and you should be ok.
In summary here is what you need to do:
Use DOM instead of SAX, it's simpler and perfect for ListView
Implement an Adapter that extends BaseAdapter passing the root element to this adapter
Implement getView in the adapter to add the TextView that you want
Again I've laid out the steps in the Android: Sax parsing to a listview. Let me know if you have any further questions

how to display a html page with image in android?

hi i want to display my html image on android emulator, please help
package com.Htmlview;
import ja va.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.MessageFormat;
import android.app.Activity;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.webkit.WebView;
public class Htmlview extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
WebView webview = new WebView(this);
setContentView(webview);
try {
String imageString="<html><body>" +
"<h2>Norwegian Mountain Trip</h2>" +
"<img src=\"C:/Users/Public/Pictures/Sample Pictures/pulpit.jpg\" alt=\"Pulpit rock\" width=\"304\" height=\"228\" /></body></html>";
AssetManager mgr = this.getAssets();
InputStream is = mgr.open("index3.html");
BufferedInputStream in = new BufferedInputStream(is); // read the contents of the file
webview.loadData(MessageFormat.format(imageString,arguments),"text/html", "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
}
}

You're never going to be able to access something on your workstation's hard drive from within Android. What you want to do is put the image into the assets folder in your Android app (which will then get bundled into the app) and link to it appropriately with file:///android_assets/. There are other ways of dealing with the issue, but that is the simplest.

Android : Reading XML from local resource (for testing)

I'm writing an app which will read XML from a webservice (probably via kSOAP2). I'm fairly happy with SAX parsing, as I've done XML parsing iPhone apps.
Unfortunately the webservice isn't public yet so for initial testing I have some files containing the XML I need to parse. In this early dev phase I just need to read the XML from the files and pass it into the XML parser
Xml.parse(this.testXML, root.getContentHandler());
How do I read the XML from a file/resource into a string to pass into this method. I want to crack on and test the parser, but this simple step is holding me up.
Thanks

Create a raw folder under res
Put your XML file in there, eg. testXML.xml:
/res/raw/testXML.xml
You should be able to use your XML parser using that as an inputstream:
Xml.parse(getResources().openRawResource(R.raw.testXML), Xml.Encoding.UTF_8, root.getContentHandler());
Try that.

I found a solution. Using Assets.
Here is the simple code example of how I did it.
I know I could have used XmlPullParser to simply load an xml file from res, but I wanted to use SAX parsing. This allows me to simply throw an XML string into the SAX parser for testing before I plug in the webservice.
It just uses a simple view with a Button to kick off the file load and a TextView to display the XML for now. I can get on with my parser :)
package com.martins.XmlParserTest
import java.io.IOException;
import java.io.InputStream;
import android.app.Activity;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class Main extends Activity {
Button btn;
TextView tvXml;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn = (Button) findViewById(R.id.button1);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Load XML for parsing.
AssetManager assetManager = getAssets();
InputStream inputStream = null;
try {
inputStream = assetManager.open("textxml.xml");
} catch (IOException e) {
Log.e("tag", e.getMessage());
}
String s = readTextFile(inputStream);
TextView tv = (TextView)findViewById(R.id.textView1);
tv.setText(s);
}
});
}
private String readTextFile(InputStream inputStream) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
byte buf[] = new byte[1024];
int len;
try {
while ((len = inputStream.read(buf)) != -1) {
outputStream.write(buf, 0, len);
}
outputStream.close();
inputStream.close();
} catch (IOException e) {
}
return outputStream.toString();
}
}

Raises exception due to incorrectly formed XML (line1,Pos0).
You tell parser that the encoding is UTF-8 and if it isn't you may get various errors (depending on parsers). If you are using non-xml editor to edit your XML it may save the file in a different encoding regardless what you declared it to be in the XML document.

Error when fetching a second XML from the web

im new to android development and im trying to build my first app which looks for a online generated xml file to display information. In the first activity i created a ListView with all the entries from an XML file, as soon as i click on an entry it passes the id and goes to the 2nd activity which should access another XML file with the details. However i keep getting this error when trying to fetch the XML for the details:
java.lang.ClassCastException:
org.apache.harmony.xml.dom.ElementImpl
Any ideas whats wrong? Here is the source for the "details" activity:
package en.android.itleaked.com;
import java.io.InputStream;
import java.net.URL;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.sax.Element;
import android.widget.ImageView;
import android.widget.TextView;
public class showReleases extends Activity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.releasedetails);
getFeed();
}
public void getFeed() {
Bundle extras = getIntent().getExtras();
try {
URL url2 = new URL("http://www.it-leaked.com/app/details.php?id=" + extras.getString("id"));
DocumentBuilderFactory dbf2 = DocumentBuilderFactory.newInstance();
DocumentBuilder db2 = dbf2.newDocumentBuilder();
Document doc2 = db2.parse(new InputSource(url2.openStream()));
doc2.getDocumentElement().normalize();
NodeList nodeList2 = doc2.getElementsByTagName("item");
String relTitle[] = new String[nodeList2.getLength()];
String relCover[] = new String[nodeList2.getLength()];
for (int i = 0; i < nodeList2.getLength(); i++) {
Node node2 = nodeList2.item(i);
Element fstElmnt2 = (Element) node2;
NodeList nameList2 = ((Document) fstElmnt2).getElementsByTagName("title");
Element nameElement2 = (Element) nameList2.item(0);
nameList2 = ((Node) nameElement2).getChildNodes();
relTitle[i] = ((Node) nameList2.item(0)).getNodeValue();
NodeList coverList2 = ((Document) fstElmnt2).getElementsByTagName("cover");
Element coverElement2 = (Element) coverList2.item(0);
coverList2 = ((Node) coverElement2).getChildNodes();
relCover[i] = ((Node) coverList2.item(0)).getNodeValue();
}
TextView txtView = (TextView)findViewById(R.id.TextView01);
txtView.setText(relTitle[0]);
ImageView imgView =(ImageView)findViewById(R.id.ImageView01);
Drawable drawable = LoadImageFromWebOperations(relCover[0]);
imgView.setImageDrawable(drawable);
}
catch (Exception e) {
TextView txtView2 = (TextView)findViewById(R.id.TextView02);
txtView2.setText("Error: " + e);
}
}
private Drawable LoadImageFromWebOperations(String url)
{
try
{
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
}catch (Exception e) {
System.out.println("Exc="+e);
return null;
}
}
}
Here is the URL for the XML with an attached id so you can see what it looks like:
http://www.it-leaked.com/app/details.php?id=50969
Any ideas whats going on? By the way i added the number 2 to every variable which has something to do with the XML parsing / fetching just to make sure theres no conflict with the other activity, but im still getting the same error..
I hope you can help me out.
Thanks in advance

This question is a little old but I believe the ClassCastException is due to attempting to cast the elements in the nodelist to android.sax.Element type rather than org.w3c.dom.Element; check the imports.

Looking at your exception (which is java.lang.ClassCastException) the problem is in casting some class to another.
In your code i didn't understand the reason casting Element to Document - Element has getElementsByTagName method which you are using. Look here: http://developer.android.com/reference/org/w3c/dom/Element.html
It is the root of all evil. Element and Document both implementing Node interface, but Document isn't implements Element - that's why Element can't be cast to Document.
Anyway, expcetion line number can determine the exact error position.