My aim is to make a HTTP request, and then change the textview that I have to be that data we got back.
The button changes the text to "Once again, we are receiving IO ERROR" always, and I don't know how to make it display the data that sendGet() is meant to return.
Code below.
package com.example.textchanger;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Button;
import android.view.View;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class MainActivity extends AppCompatActivity {
private static final String USER_AGENT = "Mozilla/5.0";
private static final String GET_URL = "http://stark-stream-56750.herokuapp.com/all";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
changeTextOnce();
}
private static String sendGET() throws IOException {
// Make URL object.
URL url_obj = new URL(GET_URL);
// Connect to object.
HttpURLConnection url_con = (HttpURLConnection) url_obj.openConnection();
// Set Request Data
url_con.setRequestMethod("GET");
url_con.setRequestProperty("User-Agent", USER_AGENT);
// What response code did we get back?
int responseCode = url_con.getResponseCode();
// If good...
if (responseCode == HttpURLConnection.HTTP_OK) {
// Make a way to read the data, and then read it
BufferedReader inReader = new BufferedReader(new InputStreamReader(url_con.getInputStream()));
// Can't be modified.
String inputLine;
// A string buffer is like a String, but can be modified.
StringBuffer response = new StringBuffer();
// For each line in the data we have, until we have no more lines
while ((inputLine = inReader.readLine()) != null) {
// Add the data to the string
response.append(inputLine);
}
// Close the reader
inReader.close();
// Print result
System.out.println(response.toString());
return response.toString();
} else {
// Error
System.out.println("GET request not worked");
return "Error!";
}
}
private void changeTextOnce() {
final TextView changingText = (TextView) findViewById(R.id.change_this);
Button changingButton = (Button) findViewById(R.id.change_text_button);
changingButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
changingText.setText(sendGET());
} catch (IOException e) {
changingText.setText("Once again, we are recieving IO ERROR");
}
}
});
}
}
