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".

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

I have a example in my another blog "Arduino-er: Standalone ESP8266/ESP-12: web control on-board LED". We can control the on-board LED via web. It's Android App to control the on-board using HttpClient.

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 org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;

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 = "";
            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);
        }
    }
}

layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/ip"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="192.168.43.103" />

    <Button
        android:id="@+id/bon"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="LED ON" />

    <Button
        android:id="@+id/boff"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="LED OFF" />

    <TextView
        android:id="@+id/info1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textStyle="italic" />

    <TextView
        android:id="@+id/info2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textStyle="bold" />
</LinearLayout>

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

Apache HTTP Client Removed from Android 6.0 release. To keep using org.apache.http.client, we have to add the code useLibrary 'org.apache.http.legacy' to build.gradle file.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "com.blogspot.android_er.androidespwebled"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    useLibrary 'org.apache.http.legacy'
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
}

Download the files (Android Studio Format) .

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

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