評級條(RatingBar)

評級條(RatingBar)是進度條(ProgressBar)和拖動條(SeekBar)的擴展類，它以星星圖案顯示評級.



使用默認風格(ratingBarStyle)時, 用戶可以觸摸/拖動, 或使用箭頭鍵, 來設定評級. 較小的ratingBarStyleSmall風格和只作指標的ratingBarStyleIndicator風格只作為指標使用, 不支持用戶交互.

佈局(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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<RatingBar  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    style="?android:attr/ratingBarStyleIndicator"
    android:id="@+id/ratingbar_Indicator"
    />
<RatingBar  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    style="?android:attr/ratingBarStyleSmall"
    android:id="@+id/ratingbar_Small"
    />
<RatingBar  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    style="?android:attr/ratingBarStyle"
    android:id="@+id/ratingbar_default"
    />
<Button
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/ratingbutton"
    android:text="Rate It"
    />
</LinearLayout>

主程序

package com.AndroidRatingBar;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RatingBar;

public class AndroidRatingBar extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        final RatingBar ratingBar_Small = (RatingBar)findViewById(R.id.ratingbar_Small);
        final RatingBar ratingBar_Indicator = (RatingBar)findViewById(R.id.ratingbar_Indicator);
        final RatingBar ratingBar_default = (RatingBar)findViewById(R.id.ratingbar_default);
        Button ratingButton = (Button)findViewById(R.id.ratingbutton);
        
        ratingButton.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    float rating = ratingBar_default.getRating();
    ratingBar_Small.setRating(rating);
    ratingBar_Indicator.setRating(rating);
   }});
    }
}