In this tutorial we will learn How to use RatingBar in Android Using Android Studio.

Generally we use RatingBar  when we want to allow the user to rate some product or action.

So lets create a project.

Step 1  – Create new Android project

Step 2 – Add a RatingBar  in the main activity. Also Add a button and TextView to the main activity as shown in the picture below.

src/main/AndroidManifest.xml

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
    android:id="@+id/abc">

    <RatingBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/ratingBar"
        android:layout_marginTop="32dp"
        android:numStars="5"
        android:rating="2"
        android:stepSize="1"
        android:layout_below="@+id/textView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Submit"
        android:id="@+id/button"
        android:layout_below="@+id/ratingBar"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

layout/activity_main.xml

package com.example.programmingknowledge.thefirstapp;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RatingBar;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
      private static Button button_sbm;
      private static TextView text_v;
      private static RatingBar rating_b;
      @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
          listenerForRatingBar();
          onButtonClickListener();
    }

    public  void listenerForRatingBar() {
        rating_b = (RatingBar) findViewById(R.id.ratingBar);
        text_v = (TextView)findViewById(R.id.textView);

        rating_b.setOnRatingBarChangeListener(
                new RatingBar.OnRatingBarChangeListener() {
                    @Override
                    public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
                        text_v.setText(String.valueOf(rating));
                    }
                }
        );
    }

    public void onButtonClickListener() {
        rating_b = (RatingBar) findViewById(R.id.ratingBar);
        button_sbm = (Button)findViewById(R.id.button);

        button_sbm.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(MainActivity.this,
                                String.valueOf(rating_b.getRating()),
                                Toast.LENGTH_SHORT).show();
                    }
                }
        );
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Now run your app

OUTPUT