Android Application Development Cookbook: 93 Recipes for Building Winning Apps

Recipe 2.5 Implementing a Star Rating System

Android Versions

Level 1 and above

Permissions

None

Source Code to Download from Wrox.com

CheckBoxesRating.zip

The previous recipe introduced you to the checkbox, in particular the star checkbox. One popular use of the star checkbox is to implement a star rating system, whereby users tap on the stars to provide a rating for a particular item (such as user reviews for books, music, or venues). This recipe demonstrates how to implement this rating system.

Solution

Assume you have the following code snippet in the activity_main.xml file:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" android:id="@+id/ratings" > <CheckBox android:id="@+id/star1" style="?android:attr/starStyle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:tag="1" /> <CheckBox android:id="@+id/star2" style="?android:attr/starStyle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:tag="2" /> <CheckBox android:id="@+id/star3" style="?android:attr/starStyle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:tag="3" /> <CheckBox android:id="@+id/star4" style="?android:attr/starStyle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:tag="4" /> <CheckBox android:id="@+id/star5" style="?android:attr/starStyle" ...