android 评分组件 RatingBar

 

在main.xml中

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

 

    <RatingBar   //评分组件

        android:id="@+id/ratingbarA"

        android:numStars="5" //一共5颗星

        android:stepSize="0.5"    //每次操作的歩长是0.5个

        android:isIndicator="false"    //用户可以操作

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

    <RatingBar

        android:id="@+id/ratingbarB"

        android:numStars="5"

        android:rating="3"   //默认值为3颗星

        android:isIndicator="true"  //用户不可以操作

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

    <TextView    //以后对于分数改变是时候可以再这个组件上显示

        android:id="@+id/text"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"/>

 

</LinearLayout>

 

 

 

在MyRatingBarDemo.java程序中

package com.tarena.ratingbar;

 

import android.app.Activity;

import android.os.Bundle;

import android.text.method.ScrollingMovementMethod;

import android.widget.RatingBar;

import android.widget.RatingBar.OnRatingBarChangeListener;

import android.widget.TextView;

 

public class MyRatingBarDemo extends Activity {

  private RatingBar ratingBarA = null;

  private TextView text = null;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        super.setContentView(R.layout.main);

        this.ratingBarA = (RatingBar) super.findViewById(R.id.ratingbarA);

        this.text = (TextView) super.findViewById(R.id.text);

        this.ratingBarA.setOnRatingBarChangeListener(new OnRatingBarChangeListenerImpl());

        this.text.setMovementMethod(ScrollingMovementMethod.getInstance());  //设置文本可滚动

    }

    private class OnRatingBarChangeListenerImpl implements OnRatingBarChangeListener{

 

     public void onRatingChanged(RatingBar ratingBar, float rating,

         boolean fromUser) {

       MyRatingBarDemo.this.text.append("当前值为: " + ratingBar

            .getRating() + " , 歩长为: " + ratingBar.getStepSize() + "\n");

     }

   

    }

}