Learn android from scratch (RatingBar scoring component. 23 .)

Learn android from scratch (RatingBar scoring component. 23 .)
If you want to rate an application, you will often use the components shown in the figure to determine the final score by selecting the number of "five-pointed stars" in Android, you can use the RatingBar component. This component can be used to facilitate user input. The definition structure of the RatingBar class is as follows: java. lang. object? Android. view. View? Android. widget. ProgressBar? Android. widget. AbsSeekBar? Common Methods for android. widget. RatingBar

1	Public RatingBar (Context context)	Structure		Create a RatingBar object
2	Public int getNumStars ()	Normal		Scored quantity
3	Public float getRating ()	Normal		Get Current Value
4	Public float getStepSize ()	Normal		Get the set step size
5	Public boolean isIndicator ()	Normal		Determine whether operation is allowed
6	Public void setIsIndicator (boolean isIndicator)	Normal	Android: isIndicator	Can be operated?
7	Public synchronized void setMax (int max)	Normal		Set the maximum value
8	Public void setNumStars (int numStars)	Normal	Android: numStars	Set the number of stars
9	Public void setOnRatingBarChangeListener (RatingBar. OnRatingBarChangeListener listener)	Normal		Set operation listening
10	Public void setRating (float rating)	Normal	Android: rating	Set Current Value
11	Public void setStepSize (float stepSize)	Normal	Android: stepSize	Set the step size for each increase

XML file

JAVA files

Package com. example. ratingbar; import org. w3c. dom. text; import android. OS. bundle; import android. app. activity; import android. widget. ratingBar; import android. widget. ratingBar. onRatingBarChangeListener; import android. widget. textView; public class MainActivity extends Activity {private RatingBar ratingBar; private TextView textView; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); ratingBar = (RatingBar) this. findViewById (R. id. ratingBar1); textView = (TextView) this. findViewById (R. id. textView1); // sets the listener method ratingBar. listener (new OnRatingBarChangeListener () {@ Overridepublic void onRatingChanged (RatingBar ratingBar, float rating, boolean fromUser) {// TODO Auto-generated method stub // textView append display data // textView. append ("*** current value:" + rating + "** step:" + ratingBar. getStepSize () + "\ n"); // The switch case statement is used to determine the number of stars evaluated. The corresponding operation switch (int) rating) {case 1: textView. setText ("current user rating: Too bad"); break; case 2: textView. setText ("current user rating: Not good"); break; case 3: textView. setText ("current user rating: Good"); break; case 4: textView. setText ("current user rating: Good"); break; case 5: textView. setText ("current user rating: Great"); break; default: break ;}}});}}

First display
Case statement to determine the Display Effect
The scoring component allows users and software developers to provide good feedback and express their opinions on some issues.
Next prediction: Several event processing methods