Download a pdf file using Android

You can easiliy copy pdf file from your pc to an android device using USB and use this app > http://updatedinfo.org/ezpdf-reader-multimedia-pdf-v2-5-5-0-apk/ to read the pdf file...

thank you for your response Chirstianbale ,
but i think you misunderstood me. i want to programme with a Android language how to download a PDF file from the internet or my server fo example

j'ai oublié de partager avec vous la solution que j'ai trouvé
elle marche bien :
telecharger un fichier à partir d'un Android

public void Download (){
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File folder = new File(extStorageDirectory, "PDF");
folder.mkdir();
File file = new File(folder, "nomFichier.pdf");
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile("http://adresse fichier/fichier.pdf", file);
Toast.makeText(this, "download finished", Toast.LENGTH_SHORT).show();

}

et pour télécharger un fichier à partir d'un client Java ou J2EE c'est pareil

try{
URL url = new URL("http://adresse fichier/fichier.pdf");
InputStream in = url.openStream();
FileOutputStream fos=null;
File doc = new File("c:/Rapports");
if(!doc.exists())
doc.mkdir();

fos = new FileOutputStream(new File("c:/newFile.pdf"));
int length = -1;
byte[] buffer = new byte[1024];
while ((length = in.read(buffer)) > -1) {
fos.write(buffer, 0, length);
}
fos.close();
in.close();
}
catch (Exception e) {
e.printStackTrace();
}