Make Tone Analyzer Android App

4 min readJun 7, 2021

Make an sentimental analysis App using IBM cloud Tone Analyzer Service……

🔭 Introduction…

The IBM Watson™ Tone Analyzer service uses linguistic analysis to detect emotional and language tones in written text.This service uses linguistic analysis to detect joy, fear, sadness, anger, analytical, confident and tentative tones found in text.This system is for demonstration purposes only and is not intended to process Personal Data.Analyze emotions and tones in what people write online, like tweets or reviews. Predict whether they are happy, sad, confident, and more.

Initialize the service in IBM cloud:

First create an free account IBM CLOUD. After login you can go to main Dashboard page. In the search bar: Search Tone Analyzer service. Select and create the service. ( this service has free plan of 2500 api calls/ month which is enough for testing purpose).

How to use the Api……

After creation the service now you can use the Tone Analyzer Api. Open the Tone Analyzer in IBM CLOUD in the Manage section copy the Api key and save it this Api will use in Android App.

Make An App….

Now create an Android App. Click on Create New Project then an create an empty Activity and then write your project and project name and click on finish button.

After gradle process running MainActivity.java and activity_main.xml is created with default code. Add the IBM CLOUD dependency in your App:

add dependency in build.gradle and sync now

implementation 'com.ibm.watson:ibm-watson:9.0.2'

After this replace MainActivity.java and activity_main.xml with this code:

MainActivity.java

package com.project.sentimentanalysis;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.ibm.cloud.sdk.core.http.ServiceCallback;
import com.ibm.cloud.sdk.core.security.Authenticator;
import com.ibm.cloud.sdk.core.security.IamAuthenticator;
import com.ibm.watson.tone_analyzer.v3.ToneAnalyzer;
import com.ibm.watson.tone_analyzer.v3.model.ToneAnalysis;
import com.ibm.watson.tone_analyzer.v3.model.ToneOptions;
import com.ibm.watson.tone_analyzer.v3.model.ToneScore;

import org.w3c.dom.Text;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    TextView txt1 ;
    EditText edtTxt1;
    Button btn1;
    String sentiment;
    boolean check = true;


    private class AskWatsonTask extends AsyncTask<String,Void,String>{
        @Override
        protected String doInBackground(String... TextToAnalyse) {
            System.out.println(edtTxt1.getText());

            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    txt1.setText("What is happening inside the thread");
                }
            });
            Authenticator authenticator = new IamAuthenticator("Replace with your Api key");
            ToneAnalyzer service = new ToneAnalyzer("2017-09-21", authenticator);

            ToneOptions toneOptions = new ToneOptions.Builder().text(String.valueOf(edtTxt1.getText())).build();
            ToneAnalysis tone = service.tone(toneOptions).execute().getResult();
            System.out.println(tone);


            sentiment = "Test Sentiment";
            System.out.println(tone);


            try {


                return tone.getDocumentTone().getTones().get(0).getToneId().toString();
            } catch (Exception exception) {

                check= false;
             //   Toast.makeText(getApplicationContext(),"Try Again Robot is confuse",Toast.LENGTH_SHORT).show();
                return null;
            }

        }

       @Override
       protected void onPostExecute(String result) {
         // txt1.setText("The message sentiment is "+ result);
           if(check ) {
               Intent intent = new Intent(MainActivity.this, ShowActivity.class);
               intent.putExtra("sentiment", result);

               startActivity(intent);
           }

           else
           {
               Toast.makeText(getApplicationContext(),"Try Again Robot is confuse",Toast.LENGTH_SHORT).show();
           }

        }
    }

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


        txt1 =  (TextView) findViewById(R.id.txt1);
        edtTxt1 =  (EditText) findViewById(R.id.edttxt1);
        btn1 =  (Button) findViewById(R.id.btn1);


     btn1.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             System.out.println("logging to the console that the button pressed for the test" + edtTxt1.getText());
             txt1.setText("Display at UI the sentiment to be checked for" +edtTxt1.getText());

             AskWatsonTask task = new AskWatsonTask();
             task.execute(new String[]{});
         }
     }

     );
    }


}

activity_main.java

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

    <View
        android:layout_width="match_parent"
        android:layout_height="50dp"></View>

    <TextView
        android:id="@+id/txt1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textSize="18dp"
        android:text="Hey ! I am Robo Analyzer...."
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/edttxt1"
        android:layout_margin="40dp"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        ></EditText>

    <Button
        android:id="@+id/btn1"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:text="Analyize "></Button>

</LinearLayout>

After this replace ShowActivity.java and activity_show.xml with this code:

ShowActivity.java

package com.project.sentimentanalysis;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class ShowActivity extends AppCompatActivity {

    TextView txt2;

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

        txt2 = (TextView) findViewById(R.id.text1);

        String id = getIntent().getStringExtra("sentiment");

        txt2.setText(id);
    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();
        finish();
    }
}

activity_show.xml

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


    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="The sentiment is :"
        android:textSize="20dp"
        android:layout_margin="50dp"></TextView>

    <TextView
        android:id="@+id/text1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="The sentiment is :"
        android:textSize="20dp"
        android:layout_margin="50dp"></TextView>

</LinearLayout>