• Android基础控件RatingBar星级评分条的使用


    1、简介

      RatingBar继承ProgressBar,除了ProgressBar的属性外还有特有属性:

    android:isIndicator:是否用作指示,用户无法更改,默认false
    android:numStars:显示多少个星星,必须为整数
    android:rating:默认评分值,必须为浮点数
    android:stepSize: 评分每次增加的值,必须为浮点数
    
    OnRatingBarChangeListener //事件处理

    2、简单使用

      1)星条的drawable资源layer-list图层:

    <?xml version="1.0" encoding="utf-8"?>
    <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:id="@android:id/background"
            android:drawable="@drawable/rating_off"/>
        <item android:id="@android:id/progress"
            android:drawable="@drawable/rating_on"/>
    </layer-list>

      2)在values文件夹下styles.xml文件中添加style:

        <style name="roomRatingBar_1" parent="@android:style/Widget.RatingBar">
            <item name="android:progressDrawable">@drawable/ratingbar_layer</item>
            <item name="android:minHeight">24dip</item>
            <item name="android:maxHeight">24dip</item>
        </style>

      3)星条的xml布局文件:

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context=".LoginActivity">
    
            <RatingBar
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/ratingbar"
                style="@style/roomRatingBar_1"
                android:isIndicator="false"
                android:numStars="6"
                android:rating="1.5"
                android:stepSize="0.25"/>
    
    </LinearLayout>

      4)Java文件事件处理:

    public class LoginActivity extends AppCompatActivity  {
    
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_login);
            // Set up the login form.
    
            RatingBar ratingBar = (RatingBar)findViewById(R.id.ratingbar);
            ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
                @Override
                public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {
                    Toast.makeText(LoginActivity.this,"rating"+String.valueOf(v),Toast.LENGTH_SHORT).show();
                }
            });
        }
    
    }

      

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  • 原文地址:https://www.cnblogs.com/xianfeng-zhang/p/8109043.html
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