android 开发之ratingbar

RatingBar组件是一个打分组件，主要用于对应用打分，下面是该组件的使用示例

首先是代码：

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

public class Main extends Activity implements OnRatingBarChangeListener
{
	private RatingBar smallRatingBar;
	private RatingBar indicatorRatingBar;
	private TextView textView;

	@Override
	public void onRatingChanged(RatingBar ratingBar, float rating,
			boolean fromUser)
	{
		smallRatingBar.setRating(rating);
		indicatorRatingBar.setRating(rating);
		if (ratingBar.getId() == R.id.ratingbar1){
			textView.setText("ratingbar1的分数：" + rating);
		}else{
			textView.setText("ratingbar2的分数：" + rating);
		}
	}

	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		//通过id获取对象
		RatingBar ratingBar1 = (RatingBar) findViewById(R.id.ratingbar1);
		RatingBar ratingBar2 = (RatingBar) findViewById(R.id.ratingbar2);
		textView = (TextView) findViewById(R.id.textview);
		//设置打分组件监听器
		ratingBar1.setOnRatingBarChangeListener(this);
		ratingBar2.setOnRatingBarChangeListener(this);
		//通过id获取对象
		smallRatingBar = (RatingBar) findViewById(R.id.smallRatingbar);
		indicatorRatingBar = (RatingBar) findViewById(R.id.indicatorRatingbar);
	}
}

 

mai.xml布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView  android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="3颗星，步长是0.5" />
	<RatingBar android:id="@+id/ratingbar1" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:numStars="3"
		android:rating="2" />
	<TextView  android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="5颗星，步长是0.1" />
	<RatingBar android:id="@+id/ratingbar2" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:numStars="5"
		android:stepSize="0.1" />
	<LinearLayout android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:layout_marginTop="10dip">

		<TextView android:id="@+id/textview" android:layout_width="wrap_content"
			android:layout_height="wrap_content" />

		<RatingBar android:id="@+id/smallRatingbar" style="?android:attr/ratingBarStyleSmall"
			android:layout_marginLeft="5dip" android:layout_width="wrap_content"
			android:layout_height="wrap_content"  />

	</LinearLayout>
	<RatingBar android:id="@+id/indicatorRatingbar" style="?android:attr/ratingBarStyleIndicator"
		android:layout_marginLeft="5dip" android:layout_width="wrap_content"
		android:layout_height="wrap_content" />
</LinearLayout>

  注：关于布局文件里几个相关属性作用：

      android:numStars 打分的星数量

      android:stepSize  步长设置（默认的步长是0.5）

     style="?android:attr/ratingBarStyleSmall 为小星星

    style="?android:attr/ratingBarStyleIndicator" 显示指示风格，不能编辑

运行结果：