问题
I'm compiling using Android 4.4.2 (API19) but running on Android 4.1.1 API 16.
Is there an Android support library,or something, so I can use PdfDocument.java (API 19) in Jellybean API 16 ?
code:
import android.graphics.pdf.PdfDocument;
import android.graphics.pdf.PdfDocument.Page;
import android.graphics.pdf.PdfDocument.PageInfo;
PdfDocument doc = new PdfDocument();
Error log:
07-22 14:58:41.869: E/dalvikvm(4165): Could not find class
'android.graphics.pdf.PdfDocument', referenced from method com.example.html2pdf.Html2pdfActivity.button1onClick
07-22 14:59:33.965: E/AndroidRuntime(4165): Caused by: java.lang.NoClassDefFoundError: android.graphics.pdf.PdfDocument
Can I package up the required system library and put it in my App ? (or somehow bypass/relocate the system call) ?
回答1:
No, sorry, Google has not published a backport of PdfDocument or pretty much anything related to the Android 4.4+ printing APIs.
回答2:
Still, google has not backported the PdfDocument API (API 19). But you can use pdfium library from AOSP or the fork from PdfiumAndroid for PDF document.
来源：https://stackoverflow.com/questions/38527965/back-porting-can-use-pdfdocument-api-19-in-jellybean-api-16