I am trying to retrieve it from firebase
pdfView= findViewById(R.id.pdfView);
url= String.valueOf(DbQuery.g_paperList.get(DbQuery.g_selected_paper_index).getPaperURL());
}
class RetrievePDFbyte extends AsyncTask<String,Void,byte[]>{
@Override
protected byte [] doInBackground(String... strings) {
InputStream inputStream = null;
try{
URL url=new URL(strings[0]);
HttpsURLConnection httpsURLConnection=(HttpsURLConnection)url.openConnection();
if (httpsURLConnection.getResponseCode()==200){
inputStream=new BufferedInputStream(httpsURLConnection.getInputStream());
}
}catch (IOException e){
return null;
}
try {
return IOUtils.toByteArray(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(byte[] bytes) {
pdfView.fromBytes(bytes).load();
progress_Dialog.dismiss();
}
}
but I am not able to use AsyncTask ,doInBackground and onPostExecute.
How i acn retrieve it from the firebase database
error i am getting
question from:
https://stackoverflow.com/questions/65920661/get-error-in-retrieve-pdf-file-from-firebase-database 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…