Open any of third party application without declaring it in manifest.xml. Intent intent = getPackageManager().getLaunchIntentForPackage( "com.thirdparty.package" ); startActivity( intent );
Install imagemagick package apt-get install imagemagick Go to the command prompt and Go to that folder containing jpg $cd path-to-your-jpg-files Use Covert comand to convert jpg to PDF $convert path-to-your-jpg-files.jpg path-to-yournewfile.pdf We can use *.jpg to include all jpg files into folder files