Working with HttpURLConnection in Android, getting information by GET
You need to get the result of the GET query in Android and return the value from the method.
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public void sayHello(View view)throws IOException {
Thread httpThread = new Thread(new Runnable() {
public void run() {
String mybla = sendGet();
}
});
httpThread.start();
}
private String sendGet(){
try{
String mystr = "http://www.pravda.com.ua";
URL obj = new URL(mystr);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("GET");
con.setRequestProperty("User-Agent", "Mozilla/5.0");
con.setRequestProperty("Accept-Charset", "UTF-8");
InputStream response = con.getInputStream();
Scanner s = new Scanner(response).useDelimiter("\\A");
String result = s.hasNext() ? s.next() : "";
return result;
}
catch (Exception e) {
return e.toString();
}
}
2 answers
You do everything right. To read a stream and get String from it, you can use, for example, the library Apache commons IOUtils (off. site). Using it:
String result = IOUtils.toString(inputStream);
If you prefer a method without third-party libraries (which I welcome, because it allows you to learn something new about the language in which you are new), then do something like this:
Scanner s = new Scanner(inputStream).useDelimiter("\\A");
String result = s.hasNext() ? s.next() : "";
UPD:
Wrap in
new Thread(new Runnable() {
public void run() {
//вызовите ваш код для сетевого запроса
}
}).start();
When your the request returned the result inside your Thread, to change the interface element you will need to do it from the UI thread. To do this, use Context.runOnUiThread();.
Code using the lib OkHttp
OkHttpClient client = new OkHttpClient.Builder().build();
String url = ...;
Request.Builder request = new Request.Builder();
request.url(url);
request.get();
Response response = client.newCall(request.build()).execute();
String response = response.body().string();
System.out.println(response );
We must remember that on Android, requests to the network can be made with API14 only outside the UI stream. For example, via AsynkTask, Thread etc