Android星级滑块

activity_main.xml

<?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"
    >
    
    <ProgressBar 
        android:id="@+id/ProgressBar01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:max="100"
        android:progress="20"
        style="@android:style/Widget.ProgressBar.Horizontal"
        />
    
    <RatingBar 
        android:id="@+id/RatingBar01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:max="5"
        android:rating="1"
        />
    

</LinearLayout>

main_activity.java

package com.example.startbar;

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

public class MainActivity extends Activity {

	final static double MAX_STAR = 5;
	final static double MAX = 100;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		RatingBar rb = (RatingBar)findViewById(R.id.RatingBar01);
		rb.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
			
			@Override
			public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) 
			{
				// TODO Auto-generated method stub
				ProgressBar pb = (ProgressBar)findViewById(R.id.ProgressBar01);
				RatingBar rb = (RatingBar)findViewById(R.id.RatingBar01);
				float rate = rb.getRating();
				pb.setProgress((int)(rate/MAX_STAR*MAX));
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}