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Added in API level 19

PdfDocument

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();
 

Summary

Nested classes

class PdfDocument.Page

This class represents a PDF document page. 

class PdfDocument.PageInfo

This class represents meta-data that describes a PDF PdfDocument.Page

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 PdfDocument.PageInfo.

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

Public constructors

PdfDocument

Added in API level 19
PdfDocument ()

Creates a new instance.

Public methods

close

Added in API level 19
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).

finishPage

Added in API level 19
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:

getPages

Added in API level 19
List<PdfDocument.PageInfo> getPages ()

Gets the pages of the document.

Returns
List<PdfDocument.PageInfo> The pages or an empty list.

startPage

Added in API level 19
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:

writeTo

Added in API level 19
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.

Protected methods

finalize

Added in API level 19
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
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