public
class
PdfDocument
extends Object
java.lang.Object | |
↳ | android.graphics.pdf.PdfDocument |
Known Direct Subclasses |
This class enables generating a PDF document from native Android content. You create a new document and then for every page you want to add you start a page, write content to the page, and finish the page. After you are done with all pages, you write the document to an output stream and close the document. After a document is closed you should not use it anymore. Note that pages are created one by one, i.e. you can have only a single page to which you are writing at any given time. This class is not thread safe.
A typical use of the APIs looks like this:
// create a new document PdfDocument document = new PdfDocument(); // crate a page description PageInfo pageInfo = new PageInfo.Builder(new Rect(0, 0, 100, 100), 1).create(); // start a page Page page = document.startPage(pageInfo); // draw something on the page View content = getContentView(); content.draw(page.getCanvas()); // finish the page document.finishPage(page); . . . // add more pages . . . // write the document content document.writeTo(getOutputStream()); // close the document document.close();
Nested classes | |
---|---|
class |
PdfDocument.Page
This class represents a PDF document page. |
class |
PdfDocument.PageInfo
This class represents meta-data that describes a PDF |
Public constructors | |
---|---|
PdfDocument()
Creates a new instance. |
Public methods | |
---|---|
void
|
close()
Closes this document. |
void
|
finishPage(PdfDocument.Page page)
Finishes a started page. |
List<PdfDocument.PageInfo>
|
getPages()
Gets the pages of the document. |
PdfDocument.Page
|
startPage(PdfDocument.PageInfo pageInfo)
Starts a page using the provided |
void
|
writeTo(OutputStream out)
Writes the document to an output stream. |
Protected methods | |
---|---|
void
|
finalize()
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
Inherited methods | |
---|---|
From
class
java.lang.Object
|
void close ()
Closes this document. This method should be called after you are done working with the document. After this call the document is considered closed and none of its methods should be called.
Note: Do not call this method if the page
returned by startPage(PageInfo)
is not finished by
calling finishPage(Page)
.
void finishPage (PdfDocument.Page page)
Finishes a started page. You should always finish the last started page.
Note: Do not call this method after close()
.
You should not finish the same page more than once.
Parameters | |
---|---|
page |
PdfDocument.Page :
The page. Cannot be null. |
See also:
List<PdfDocument.PageInfo> getPages ()
Gets the pages of the document.
Returns | |
---|---|
List<PdfDocument.PageInfo> |
The pages or an empty list. |
PdfDocument.Page startPage (PdfDocument.PageInfo pageInfo)
Starts a page using the provided PdfDocument.PageInfo
. After the page
is created you can draw arbitrary content on the page's canvas which
you can get by calling getCanvas()
. After you are done
drawing the content you should finish the page by calling
finishPage(Page)
. After the page is finished you should
no longer access the page or its canvas.
Note: Do not call this method after close()
.
Also do not call this method if the last page returned by this method
is not finished by calling finishPage(Page)
.
Parameters | |
---|---|
pageInfo |
PdfDocument.PageInfo :
The page info. Cannot be null. |
Returns | |
---|---|
PdfDocument.Page |
A blank page. |
See also:
void writeTo (OutputStream out)
Writes the document to an output stream. You can call this method multiple times.
Note: Do not call this method after close()
.
Also do not call this method if a page returned by startPage(PageInfo)
is not finished by calling finishPage(Page)
.
Parameters | |
---|---|
out |
OutputStream :
The output stream. Cannot be null. |
Throws | |
---|---|
IOException |
If an error occurs while writing. |
void finalize ()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
A subclass overrides the finalize
method to dispose of
system resources or to perform other cleanup.
The general contract of finalize
is that it is invoked
if and when the JavaTM virtual
machine has determined that there is no longer any
means by which this object can be accessed by any thread that has
not yet died, except as a result of an action taken by the
finalization of some other object or class which is ready to be
finalized. The finalize
method may take any action, including
making this object available again to other threads; the usual purpose
of finalize
, however, is to perform cleanup actions before
the object is irrevocably discarded. For example, the finalize method
for an object that represents an input/output connection might perform
explicit I/O transactions to break the connection before the object is
permanently discarded.
The finalize
method of class Object
performs no
special action; it simply returns normally. Subclasses of
Object
may override this definition.
The Java programming language does not guarantee which thread will
invoke the finalize
method for any given object. It is
guaranteed, however, that the thread that invokes finalize will not
be holding any user-visible synchronization locks when finalize is
invoked. If an uncaught exception is thrown by the finalize method,
the exception is ignored and finalization of that object terminates.
After the finalize
method has been invoked for an object, no
further action is taken until the Java virtual machine has again
determined that there is no longer any means by which this object can
be accessed by any thread that has not yet died, including possible
actions by other objects or classes which are ready to be finalized,
at which point the object may be discarded.
The finalize
method is never invoked more than once by a Java
virtual machine for any given object.
Any exception thrown by the finalize
method causes
the finalization of this object to be halted, but is otherwise
ignored.
Throws | |
---|---|
Throwable |