自定义RatingBar

先看效果（下图里的用户的等级小星星）:

这里本来可以修改ratingbar，使用自定义样式，即修改ratingbar图片来实现自定义ratingbar目的，但是这样图片的大小就不好控件，只能是图片给多大的显示多大，很无奈，我自己写了一个较灵活使用的ratingBar:

package com.gtuu.gzq.customview;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.gtuu.gzq.R;

/**
 * 自定义rating bar
 *
 * @author chenwenbiao
 * @date 2014-5-3
 * @version
 */
@SuppressLint("NewApi") 
public class MyRatingBar extends LinearLayout{

	
	
	private float totalWidth;
	private float totalHeight;
	private int margin;
	private int startNumber;
	private int rating;//等级
	private int ratingInResourceId;//相当于选中时的资源图
	private int ratingOutResourceId;//相当于非选中时的资源图
	private ImageView imageView;
	private TypedArray mTypedArray;
 	
	private Context context = null;
	
	public MyRatingBar(Context context) {  
        this(context, null);  
    }  
  
    public MyRatingBar(Context context, AttributeSet attrs) {  
        this(context, attrs, 0);  
    }  
      
    public MyRatingBar(Context context, AttributeSet attrs, int defStyle) {  
        super(context, attrs, defStyle);  
          
        this.context = context;
          
        mTypedArray = context.obtainStyledAttributes(attrs,  
                R.styleable.MyRatingBar);  
          
        //获取自定义属性和默认值  
        totalWidth = mTypedArray.getDimension(R.styleable.MyRatingBar_total_width, 40);
        totalHeight = mTypedArray.getDimension(R.styleable.MyRatingBar_total_height, 10);
        margin = (int) mTypedArray.getDimension(R.styleable.MyRatingBar_margin, 2);
        startNumber = mTypedArray.getInt(R.styleable.MyRatingBar_start_number, 0); 
          
        rating = mTypedArray.getInt(R.styleable.MyRatingBar_rating, 0);
        ratingInResourceId = mTypedArray.getResourceId(R.styleable.MyRatingBar_rating_in_bg, -1);
        ratingOutResourceId = mTypedArray.getResourceId(R.styleable.MyRatingBar_rating_out_bg, -1);


        mTypedArray.recycle();
        
        if(startNumber > 0){
        	initialsView();
        }
    }  
      

    private void initialsView(){
    	/**
    	 * 生成startNumber个自定义图片
    	 */
    	for(int i = 0 ; i < startNumber ; i++){
	    	ImageView imageView = new ImageView(context, null);//存放自定义图片，如五角星的图片控件
	    	
	    	if(i < rating){
	    		imageView.setImageResource(ratingInResourceId);//设置等级内的图片
	    	}
	    	else {
				imageView.setImageResource(ratingOutResourceId);//等级外的图片
			}
	    	
	    	LinearLayout.LayoutParams  layoutParams = new LinearLayout.LayoutParams((int)(totalWidth / startNumber), (int)totalHeight);//设计每一个自定义图片的大小
	    	layoutParams.setMargins(margin, 0, margin, 0);
	    	addView(imageView,layoutParams);
    	}
    }
    
    //设置星星的个数
    public void setRating(int level){
    	//防止level超出星星个数
    	if( level > startNumber){
    		level = startNumber;
    	}
    	for(int i = 0 ; i < startNumber ; i++){
    		ImageView subView = (ImageView) getChildAt(i);
    		if(i < level){
    			subView.setImageResource(ratingInResourceId);//设置等级内的图片
    		}else{
    			subView.setImageResource(ratingOutResourceId);//等级外的图片
    		}
    	}
    	invalidate();
    }
}

使用简单：

			<com.vvpinche.view.MyRatingBar
			    android:layout_width="80dp"
			    android:layout_height="20dp"
			    ptr:total_width="160dp"
			    ptr:total_height="20dp"
                            ptr:margin="2dp"
			    ptr:start_number="6"
			    ptr:rating="3"
			    ptr:rating_in_bg="@drawable/comment_star"
			    ptr:rating_out_bg="@drawable/comment_star_no_select"
			    />

value文件夹下加入attrs.xml:

<?xml version="1.0" encoding="UTF-8"?>
<resources>

    <!-- 等级自定义等级控件属性 -->
    <declare-styleable name="MyRatingBar">
        <attr name="total_width" format="dimension" />
        <attr name="total_height" format="dimension" />
        <attr name="margin" format="dimension" />
        <attr name="start_number" format="integer" />

        <!-- 等级数 -->
        <attr name="rating" format="integer"></attr>

        <!-- 等级内图片 -->
        <attr name="rating_in_bg" format="reference"></attr>

        <!-- 等级外图片 -->
        <attr name="rating_out_bg" format="reference"></attr>
    </declare-styleable>

    

</resources>

 这里给的星星图片是比较大的，而结过使用上面自定义的ratingbar后，图片也相应小，符合使用。