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I need a way to load through a URL a text that is in it.
The text is large, and this way the application would be lighter. I want to set the text that is downloaded from this link in a TextView.
2 answers
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To download the text, try this:
public static String download(String url) throws IOException {
try {
return download(new URL(url));
} catch (MalformedURLException e) {
throw new IllegalArgumentException(e);
}
}
public static String download(URL url) throws IOException {
ByteArrayOutputStream baixado = new ByteArrayOutputStream(20480);
try (InputStream is = url.openStream()) {
int t;
while ((t = is.read()) != -1) {
baixado.write(t);
}
return baixado.toString();
}
}
private static String FURIA_DE_TITANS_URL = "https://example.com/furiadetitans";
Then you just have to do it:
seuTextView.setText(download(FURIA_DE_TITANS_URL));
However, I don’t know if this is the best idea for you. Unless the amount of texts is too large or changes too often, consuming internet connection with it does not seem like a good idea, and it would be easier if the texts were within your application.
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But it would not be a download but a simple upload, kind of an image that is loaded by a url connection. once the application is closed the text no longer exists and when the text is reopened and loaded again with the others.
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@Moysés I don’t understand your position. If the program downloads something from the internet, even if it is during its upload, the name of this action is download.
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Yes but the text file is not to be stored on the device, but only viewed as well as in browsers.
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@Moysés I edited the answer. That’s what you want?
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I’m not sure if it’s possible to do this with a text file directly from Google Drive, because actually when you click on the comment link referring to your .txt, it opens not only a text, but a text visualization manager.
But by answering your question, you can list data from a . txt using a AsyncTask. So I created a file .txt where it is possible to view it as text when opened by browser to exemplify.
Basic example of the use of AsyncTask:
new AsyncTask<Void,String,String>(){
@Override
protected String doInBackground(Void... params) {
return toString();
}
protected void onPostExecute(String results){
}
}.execute();
Reading the URL file:
URL url = new URL(url_desejada);
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in .readLine()) != null) {
} in.close();
Complete code:
new AsyncTask < Void, String, String > () {
// variavel criada para receber o texto da url
StringBuilder text = new StringBuilder();
@Override
protected String doInBackground(Void...params) {
try {
// Cria uma URL com o arquivo desejado
URL url = new URL("https://raw.githubusercontent.com/cleidimarviana/SOpt/master/TEXT/loremipsum.txt");
// Ler o texto retornado pelo servidor
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in .readLine()) != null) {
// str se refere a linha do texto retornado pelo servido
// no entanto o usso do append eh para concatenar todas as linas
text.append(str);
} in .close();
} catch (IOException e) {
// aqui pode ser inserido uma alerta referente a comunicao
}
return text.toString();
}
protected void onPostExecute(String results) {
// result é a resposta recebida pelo doInBackGround()
// entao a linha abaixo define o textview com o resultado esperado
textview.setText(results);
}
}.execute();
To leave registered, I created a file with the name Gettextfilebyurl on Github.
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You need to explain more about what you want. What do you mean by "(...) loading a text URL (...)"? Is the html content of a page? Is the json/xml returned?
– ramaral
I want to set the text of the link in the textview, but not the link. https://drive.google.com/open?id=0B_HQ8JP4ovcIbVcxQ3RvcDFtWHc that text in the example application.
– Moysés