Android App to control Standalone ESP8266/ESP-12 on-board LED, using HttpURLConnection

This example have the same function of the last post "Android App to control Standalone ESP8266/ESP-12 on-board LED, using HttpClient", but using java.net.HttpURLConnection instead of using Android 6.0 removed org.apache.http; to control the on-board in the post "Arduino-er: Standalone ESP8266/ESP-12: web control on-board LED".

APK link can be found on bottom of this post.


MainActivity.java

package com.blogspot.android_er.androidespwebled;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    EditText editIp;
    Button btnOn, btnOff;
    TextView textInfo1, textInfo2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        editIp = (EditText)findViewById(R.id.ip);
        btnOn = (Button)findViewById(R.id.bon);
        btnOff = (Button)findViewById(R.id.boff);
        textInfo1 = (TextView)findViewById(R.id.info1);
        textInfo2 = (TextView)findViewById(R.id.info2);

        btnOn.setOnClickListener(btnOnOffClickListener);
        btnOff.setOnClickListener(btnOnOffClickListener);
    }

    View.OnClickListener btnOnOffClickListener = new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            String onoff;
            if(v==btnOn){
                onoff="/on";
            }else{
                onoff="/off";
            }

            btnOn.setEnabled(false);
            btnOff.setEnabled(false);

            String serverIP = editIp.getText().toString()+ onoff;

            TaskEsp taskEsp = new TaskEsp(serverIP);
            taskEsp.execute();

        }
    };

    private class TaskEsp extends AsyncTask<Void, Void, String> {

        String server;

        TaskEsp(String server){
            this.server = server;
        }

        @Override
        protected String doInBackground(Void... params) {

            final String p = "http://"+server;

            runOnUiThread(new Runnable(){
                @Override
                public void run() {
                    textInfo1.setText(p);
                }
            });

            String serverResponse = "";

            //Using java.net.HttpURLConnection
            try {
                HttpURLConnection httpURLConnection = (HttpURLConnection)(new URL(p).openConnection());

                if(httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {

                    InputStream inputStream = null;
                    inputStream = httpURLConnection.getInputStream();
                    BufferedReader bufferedReader =
                            new BufferedReader(new InputStreamReader(inputStream));
                    serverResponse = bufferedReader.readLine();

                    inputStream.close();
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
                serverResponse = e.getMessage();
            } catch (IOException e) {
                e.printStackTrace();
                serverResponse = e.getMessage();
            }
            //

            //Using org.apache.http
            /*
            HttpClient httpclient = new DefaultHttpClient();
            try {
                HttpGet httpGet = new HttpGet();
                httpGet.setURI(new URI(p));
                HttpResponse httpResponse = httpclient.execute(httpGet);

                InputStream inputStream = null;
                inputStream = httpResponse.getEntity().getContent();
                BufferedReader bufferedReader =
                        new BufferedReader(new InputStreamReader(inputStream));
                serverResponse = bufferedReader.readLine();

                inputStream.close();
            } catch (URISyntaxException e) {
                e.printStackTrace();
                serverResponse = e.getMessage();
            } catch (ClientProtocolException e) {
                e.printStackTrace();
                serverResponse = e.getMessage();
            } catch (IOException e) {
                e.printStackTrace();
                serverResponse = e.getMessage();
            }
            */

            return serverResponse;
        }

        @Override
        protected void onPostExecute(String s) {
            textInfo2.setText(s);
            btnOn.setEnabled(true);
            btnOff.setEnabled(true);
        }
    }
}

For layout file, refer to last post "Android App to control Standalone ESP8266/ESP-12 on-board LED, using HttpClient".

uses-permission of "android.permission.INTERNET" is needed in AndroidManifest.xml.

NO need to add the code useLibrary 'org.apache.http.legacy' to build.gradle file.

Download the files (Android Studio Format) .

Download APK .

ESP8266/ESP-12 code, refer "Arduino-er: Standalone ESP8266/ESP-12: web control on-board LED".