RatingBar Android App Using Android Studio

Introduction

Android RatingBar can be used to get a rating from the user. The Rating returns a floating-point number. It may be 2.0, 3.5, 4.0 etc. Android RatingBar displays the rating in stars. In this article, I will show you how to create a RatingBar Android App using Android Studio.

Requirements

Android Studio version 2.3.3
Little bit XML and JAVA knowledge.
Android Emulator (or) Android mobile
Download link (Android Studio)

Important Points to Remember

The getRating() method of the Android RatingBar class returns the rating number.

Create a New Project

Open Android Studio and create a New Android Studio Project.

activity_main.xml

Drag the RatingBar and Button from the palette now the activity_main.xml file will look like this,

<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"
tools:context=".MainActivity" >
<RatingBar
android:id="@+id/ratingBar1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="44dp" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/ratingBar1"
android:layout_below="@+id/ratingBar1"
android:layout_marginLeft="92dp"
android:layout_marginTop="66dp"
android:text="submit" />
</RelativeLayout>

Activity class

Let's write the code to display the rating of the user.

MainActivity.java- The Header File

package abu.ratingbar;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RatingBar;
import android.widget.Toast;

Declare the Button with Rating Bar,

public class MainActivity extends Activity {
RatingBar ratingbar1;
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addListenerOnButtonClick();
}
public void addListenerOnButtonClick(){
ratingbar1=(RatingBar)findViewById(R.id.ratingBar1);
button=(Button)findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) String rating=String.valueOf(ratingbar1.getRating());
Toast.makeText(getApplicationContext(), rating, Toast.LENGTH_LONG).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}