Rating bar is a control which provides a user interface to give feedback about the application. It always returns value in floating point. I am using Rating Bar, Button and Text view controls to get the feedback when the user clicks on the button. ratingbar() and onClickListener are used to invoke the users' feedback. 

Attributes

o android:numStars: This attribute displays the number of stars for user feedback

o android:rating: By this method, you can set rating point for the user

o android:isIndicator: It checks whether rating bar has indicator state

o android:stepSize: It is used to set the number of step size increment in a value of rating.

Methods

o getOnRatingBarChangeListener(): It is a callback method, which is called when the users give rating to the application

o setOnRatingBarChangeListenter(): This method sets the listener for star bars ,when user selects the number of stars.

o getnumStars(): We get the number of stars shown in devices by using this method

o setnumStars(): we can set the number of stars displayed on screens.

o getisIndicator(): This method allows users to not change the rating bar value

o setisIndicator(): If its value is true, users cannot change the value of stars.

o setMax(): It sets the maximum limit of rating bar stars values

o getRating(): It returns the number of a rating given by users.

o setRating(): In this method, we assign the value of stars is filled

o setStepSize(): We can set the number of stars value incremented on users feedback

o getStepSize(): We get the response of each value of star on the basis of selection of stars

Android_Manifest.xml

    <applicat<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.mapsample.msclient009.ratingbar">



ion

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>



</manifest>

Main_Activity.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:layout_height="match_parent"

    tools:context="com.mapsample.msclient009.ratingbar.MainActivity"

    android:orientation="vertical">



<LinearLayout

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical">

    <TextView

        android:id="@+id/tv"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_weight="1"

        android:background="#199119"

        android:gravity="center"

        android:text="Ths is Rating Bar"

        android:textColor="#F9F9F9"

        android:textSize="20dp" />



    <RatingBar

        android:id="@+id/ratebar"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_below="@+id/tv"

        android:layout_centerHorizontal="true"

        android:layout_weight="1" />

</LinearLayout>

<LinearLayout

    android:layout_width="match_parent"

    android:layout_height="wrap_content">

    <Button

        android:id="@+id/btn"

        android:layout_marginTop="0dp"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_weight="1"

        android:layout_below="@+id/ratebar"

        android:text="Rate it Now"

        />

    </LinearLayout>

</LinearLayout>

Main_Activity.java

package com.mapsample.msclient009.ratingbar;



import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.RatingBar;

import android.widget.TextView;

import android.widget.Toast;



public class MainActivity extends AppCompatActivity {

RatingBar rb;

Button btn;

TextView tv;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate ( savedInstanceState );

        setContentView ( R.layout.activity_main );

        ratingStar();

    }

    public void ratingStar()

    { rb =(RatingBar)findViewById ( R.id.ratebar );

      btn =(Button)findViewById ( R.id.btn );

      tv =(TextView)findViewById ( R.id.tv );

      btn.setOnClickListener ( new View.OnClickListener ( ) {

          @Override

          public void onClick(View v) {

            String rateNumber =String.valueOf (rb.getRating ());

              Toast.makeText ( getApplicationContext (),"You have rated"+rateNumber,Toast.LENGTH_LONG ).show ();

              double value = Double.valueOf ( Double.valueOf (rateNumber ) );

              if(value>3 && value<=5)

              {

                  Toast.makeText ( getApplicationContext (),"This app is a good",Toast.LENGTH_LONG ).show ();



              } else {Toast.makeText ( getApplicationContext (),"This app is not a good",Toast.LENGTH_LONG ).show ();}

          }

      } );



    }

}

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