In my application I will receive a byte stream and convert it to a pdf file in the phone memory. How do I render that to a pdf? And show it on an activity?
- This has been answered here: stackoverflow.com/a/16294833/2027232Nicolas Tyler– Nicolas Tyler2013-05-14 12:17:18 +00:00Commented May 14, 2013 at 12:17
Add a comment |
6 Answers
Some phones (like the Nexus One) come with a version of Quickoffice pre-installed so it may be as easy as sending the appropriate Intent once you've saved the file to the SD card.
public class OpenPdf extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button button = (Button) findViewById(R.id.OpenPdfButton); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { File file = new File("/sdcard/example.pdf"); if (file.exists()) { Uri path = Uri.fromFile(file); Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(path, "application/pdf"); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); try { startActivity(intent); } catch (ActivityNotFoundException e) { Toast.makeText(OpenPdf.this, "No Application Available to View PDF", Toast.LENGTH_SHORT).show(); } } } }); } } 
8 Comments
Mikey
hmm ill try this tomorrow. so from byte streams i will get i need to save them as a file and then try doing that code .
Mikey
hmm how about if i do not have QuickOffice installed in my Android?
Necronet
so? what if you do not have QuickOffice?
Tofeeq Ahmad
If phone has not quick Office then?
EnthuDeveloper
How to do open the PDF file directly from the Server? Rather than saving it on the device and then opening.
|
public class MyPdfViewActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); WebView mWebView=new WebView(MyPdfViewActivity.this); mWebView.getSettings().setJavaScriptEnabled(true); mWebView.getSettings().setPluginsEnabled(true); mWebView.loadUrl("https://docs.google.com/gview?embedded=true&url="+LinkTo); setContentView(mWebView); } } 
4 Comments
Nathan Do
i think this only works with the google viewer link, because it only serves images. If we use link to pdf directly, it won't work. Is that correct ?
Alfie Hanssen
This does not appear to work for local files, only remote ones.
support_ms
What if link will change?
Wédney Yuri
"After testing it persistently for 2 days, I got an error on Google docs saying You've reached the bandwidth limit for viewing or downloading files that aren't in Google Docs format..... So doesn't seem reliable." stackoverflow.com/questions/2655972/…
Android-Lollipop (api 21) introduce a new API : PdfRenderer
This API allows you to create a Bitmap from a page in a PDF document.
Shortly :
get a seekable file descriptor from your pdf document :
ParcelFileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY)create the PdfRenderer
PdfRenderer renderer = new PdfRenderer(fd);prepare the Bitmap
Bitmap bitmap = Bitmap.createBitmap(WIDTH, HEIGHT, Bitmap.Config.ARGB_4444);get the PdfRenderer.Page to render
PdfRenderer.Page page = renderer.openPage(pageIndex);render the page on the prepared bitmap
page.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);now you can do what you want with the bitmap.
note that the 2 null args may allow you to clip some portion in the page and perform a transformation (using a Matrix) of the clip
there is another rendering mode : RENDER_MODE_FOR_PRINT. If you need this mode there are some guidelines to use it properly : here are the details.
2 Comments
Gokhan Arik
Is there any way to achieve this without saving file on the phone? I am getting PDF as bytestream and I need to show it to user without saving it on the phone.
ben75
the constraint is to pass a seekable file descriptor to the constructor; and fd from a socket stream is not seekable. You may try to store all the bytes from the stream in a buffer and get a seekable fd from that.
This library is simple and works well: Android Pdf Viewer https://github.com/barteksc/AndroidPdfViewer
Old Reply...
I think that Joan Zapata give us the better and simple solution:
https://github.com/JoanZapata/android-pdfview
I assure you that it works!
3 Comments
h-bomb
Alecs: What did you use for the pdfName in
pdfView.fromAsset(pdfName)? I tried using the absolute path, but the file was not found (and I am certain it is there). Example: /data/data/package.name/files/images/filename.pdf
Alecs
Dear @h-bomb, you have to use fromasset method when your pdf is in the asset foder of your project. To load the pdf from the device, you can use fromFile method.
h-bomb
Thanks so much. I decided to use Android's FileProvider and allow an external app open the PDF. Suprisingly, the documentation and sample code in the FileProvider dev doc were excellent.
For the local pdf files, you can render them through the third party libraries. for example, use the MuPDF library, its supported file types include PDF, PNG and JPEG.
One shortcoming of MuPDF is that it uses native library to fulfill the target, so it won't be easy to port the application on BlackBerry platform later.
Comments
To open a pdf from a byte array, you can use RadaeePDF, you can do the following into your activity:
private PDFReader m_vPDF = null; private Document doc = new Document(); public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); Global.Init(this); m_vPDF = new PDFReader(this); doc.Close(); int ret = m_doc.OpenMem(data, password); switch( ret ) { case -1://need input password finish(); break; case -2://unknown encryption finish(); break; case -3://damaged or invalid format finish(); break; case -10://access denied or invalid file path finish(); break; case 0://succeeded, and continue break; default://unknown error finish(); break; } m_vPDF.open(doc); setContentView( m_vPDF ); } 