自定义样式RatingBar的使用

1.设置布局文件，自定义ratingbar样式

 <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="${relativePackage}.${activityClass}" >

     <RatingBar
         android:id="@+id/rb"
         android:layout_width="wrap_content"
         android:layout_height="30dp"
         android:layout_marginLeft="20dp"
         android:layout_marginTop="20dp"
         android:numStars="5"
         android:progressDrawable="@drawable/rating_star"
         android:stepSize="0.5" /> <!-- 自定义ratingbar样式 -->

     <TextView
         android:id="@+id/tv_num"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@+id/rb"
         android:layout_marginLeft="20dp"
         android:layout_marginTop="20dp"
         android:text="当前评分是：" />

     <TextView
         android:id="@+id/tv"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@+id/rb"
         android:layout_marginTop="20dp"
         android:layout_toRightOf="@id/tv_num"
         android:text="0.0"
         android:textColor="#FF0000" />

 </RelativeLayout>

2.在activity中设置监听器

 package com.example.ratingbar;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.RatingBar;
 import android.widget.RatingBar.OnRatingBarChangeListener;
 import android.widget.TextView;

 public class MainActivity extends Activity {

     private TextView tv;
     private RatingBar rb;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         //找到控件
         tv = (TextView) findViewById(R.id.tv);
         rb = (RatingBar) findViewById(R.id.rb);
         rb.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {//设置ratingbar监听器

             @Override
             public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
                 if(fromUser){//如果是用户操作
                     tv.setText(Float.toString(rating));//显示分数
                 }

             }
         });

     }
 }

3.效果图