使用RatingBar组件实现评分

阶段一：进行主界面的布局（如下图）

具体代码如下：

<LinearLayout 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"
    android:background="#836FFF"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="@dimen/padding_medium"
        android:text="@string/grade"
        tools:context=".MainActivity" />

    <RatingBar
        android:id="@+id/ratingbar_big"
        style="?android:attr/ratingBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:numStars="5"
        android:rating="0.5"
        android:stepSize="0.5" />
    <TextView
        android:id="@+id/result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="@dimen/padding_medium"
        android:layout_marginRight="10dp"/>
    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="@dimen/padding_medium"
            android:text="@string/recommend"/>

        <RatingBar
            android:id="@+id/ratingbar_small"
            style="?android:attr/ratingBarStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:layout_gravity="center_vertical"
            android:numStars="5"
            android:rating="2.5" />

    </LinearLayout>
    

</LinearLayout>

阶段二：在MainActivity中查找组件并进行相应的处理，具体代码如下：

package com.lks.ratingbar;

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

public class MainActivity extends Activity {

	private RatingBar ratingBar_big;
	private RatingBar ratingBar_small;
	private TextView result;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ratingBar_big=(RatingBar) findViewById(R.id.ratingbar_big);
        ratingBar_small=(RatingBar) findViewById(R.id.ratingbar_small);
        result=(TextView) findViewById(R.id.result);
        ratingBar_big.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
			
			@Override
			public void onRatingChanged(RatingBar ratingBar, float rating,
					boolean fromUser) {
				result.setText("评分结果为："+rating);
				
			}
		});
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    
}

结果显示：