Android L PDF Render for Print on Nexus 7

Android L, previously known as Android 5, is a major departure for Android OS, with a completely redesigned interface, more fluid animations, Bluetooth Low Energy broadcasting, NFC enhancement, a renewed focus on improving battery life, and compatibility with 64-bit processors, will be released in this Fall.

Regarding to the enhancement in Printing Framework, a native PDF renderer is added to convert PDF to a bitmap, which can be used for print preview, according to Chet Haase.

A typical use of the APIs to render a PDF looks like this:

 // create a new renderer
 PdfRenderer renderer = new PdfRenderer(getSeekableFileDescriptor());

 // let us just render all pages
 final int pageCount = renderer.getPageCount();
 for (int i = 0; i < pageCount; i++) {
     Page page = renderer.openPage(i);

     // say we render for showing on the screen
     page.render(mBitmap, null, null, Page.RENDER_MODE_FOR_DISPLAY);

     // do stuff with the bitmap

     // close the page
     page.close();
 }

 // close the renderer
 renderer.close();
 

The Android L preview image can be downloaded from the Android developer website:

Device	Download	Checksum
Nexus 5 (GSM/LTE) "hammerhead"	hammerhead-lpv79-preview-ac1d8a8e.tgz	MD5: 5a6ae77217978cb7b958a240c2e80b57 SHA-1: ac1d8a8e4f4a1dca5864dc733caa940bffc28616
Nexus 7 (Wifi) "razor"	razor-lpv79-preview-d0ddf8ce.tgz	MD5: b293a5d3a4e07beabebcc0be85ad68a2 SHA-1: d0ddf8ce733ba2a34279cdff8827fd604762c2342d

To flash a system image:

1. Download the appropriate system image for your device below, then unzip it to a safe directory.
2. Connect your device to your computer over USB.
3. Start the device in fastboot mode with one of the following methods:
   • Using the adb tool: With the device powered on, execute:

     adb reboot bootloader

   • Using a key combo: Turn the device off, then turn it on and immediately hold down the relevant key combination for your device. For example, to put a Nexus 5 ("hammerhead") into fastboot mode, press and hold Volume Up + Volume Down + Power as the device begins booting up.
4. If necessary, unlock the device's bootloader by running:

   fastboot oem unlock

   The target device will show you a confirmation screen. (This erases all data on the target device.)
5. Open a terminal and navigate to the unzipped system image directory.
6. Execute the flash-all script. This script installs the necessary bootloader, baseband firmware(s), and operating system.