android之RatingBar

            RatingBar是基於SeekBar和ProgressBar的擴展，用星型來顯示等級評定。使用RatingBar的默認大小時，用戶可以觸摸/拖動或使用鍵來設置評分，它有兩種樣式(小風格用ratingBarStyleSmall，大風格用ratingBarStyleIndicator)。在工程中設置了三種樣式風格的RatingBar，並且當點擊按鈕的時候可以改變星星的級數。

效果圖：

 

 

layout文件中的xml文件：

 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#ff00ff">

    <TextView
        android:id="@+id/myTextView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="當前評分：" />
    <RatingBar
        android:id="@+id/myRatingBar1"
        android:numStars="5" //設置星星的數量
        android:rating="5"    //設置當前的星星級數
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:isIndicator="false"
        style="?android:attr/ratingBarStyle" //設置RatingBar的樣式
        />

    <RatingBar
        android:id="@+id/myRatingBar2"
        android:numStars="5"
        android:rating="5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:isIndicator="false"
        style="?android:attr/ratingBarStyleIndicator"
        />

    <RatingBar
        android:id="@+id/myRatingBar3"
        android:numStars="5"
        android:rating="5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:isIndicator="false"
        style="?android:attr/ratingBarStyleSmall"
        />

</LinearLayout>

Activaty.java文件

 

package com.cheng.ratingbarproject;

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 RatingBarProject extends Activity {
    //定義組件
    private RatingBar mRatingBar1;
    private RatingBar mRatingBar2;
    private RatingBar mRatingBar3;
    private TextView mTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        super.setContentView(R.layout.main);
        //獲得組件
        mRatingBar1 = (RatingBar)findViewById(R.id.myRatingBar1);
        mRatingBar2 = (RatingBar)findViewById(R.id.myRatingBar2);
        mRatingBar3 = (RatingBar)findViewById(R.id.myRatingBar3);
        mTextView = (TextView)findViewById(R.id.myTextView);

        //設置RatingBar的監聽器
        OnRatingBarChangeListener orbcl = new OnRatingBarChangeListener() {
            //當點擊的時候將當前的星星級數改變爲點擊的位置的值
            @Override
            public void onRatingChanged(RatingBar ratingBar, float rating,
                    boolean fromUser) {
                // TODO Auto-generated method stub
                mRatingBar2.setRating(rating);
                mRatingBar3.setRating(rating);
                mTextView.setText("當前分數："+ rating);

            }
        };
        //綁定監聽器
        mRatingBar1.setOnRatingBarChangeListener(orbcl);
    }

    @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;
    }

}

ok，今天到此了。