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