findViewbyID - How to Find a RatingBar using ID

findViewbyId was added in API Level 1
findViewById: Look for a child RatingBar with the given id. If this view has a given id, return this RatingBar. The findViewById() method is available to all activities in Android. findViewById allows you to find a view inside an activity layout.

1. Name a RatingBar, in XML named myRatingBar.

2. Declare a RatingBar named myRatingBar.

3. In MainActivity, java file, add the below code to the onCreate method. Where R.id.myRatingBar is the same as the android:id name in your main.xml file, and myRatingBar is the RatingBar name referred to in Java. This returns a RatingBar class and is casted to a RatingBar type so you can work with it.

myRatingBar = (RatingBar) findViewById(R.id.myRatingBar); 

4. Compile and run!

Resources:

http://developer.android.com/reference/android/view/View.html#findViewById(int)

How to Declare a RatingBar

RatingBar was added in API Level 1
A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars. The user can touch/drag or use arrow keys to set the rating when using the default size RatingBar.

1. In the MainActivity.java file, add the below line to the imports section.

import android.widget.RatingBar;

2. Add the below line to the onCreate method. This will declare a new RatingBar named myRatingBar.

RatingBar myRatingBar;

3. Compile and run!

Next Recommended Article: findViewbyID - How to Find a RatingBar using ID

Resources:
http://developer.android.com/reference/android/widget/RatingBar.html

android:id - How to Name a Rating Bar, in XML

android:id was added in API Level 1
This is a unique identifier name for the RatingBar so you can refer to the RatingBar later in your project.

1. Add a Rating Bar in your main.xml file.

2. In the main.xml file, add the code below between the RatingBar tags.This will name the RatingBar myRatingBar.

  <RatingBar
        ...
       android:id = "@+id/myRatingBar"
  />

3. The "+" character is required if you have not yet defined that id, if perhaps the element you reference is lower in the .xml file.

Otherwise you if it's already defined above (or included) then you can omit the "+" char:

4. Compile and run!

Next Recommended Article: How to Declare a RatingBar

Resources:
http://developer.android.com/reference/android/view/View.html#attr_android:id

http://developer.android.com/reference/android/R.attr.html#id

How to Add Rating Bar, in XML

RatingBar was added in API Level 1
A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars. The user can touch/drag or use arrow keys to set the rating when using the default size RatingBar.

1. In the main.xml file, add the below code after your layout tags.

<RatingBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
 />

2. Compile and run!

Next Recommended Article: android:id - How to Name a Rating Bar, in XML

Resources:
http://developer.android.com/reference/android/widget/RatingBar.html