Android 第三十九章 RatingBar

一、属性

android:i sIndi cat o r=“false” 此评级栏是否为指示器（用户不可更改）。默认 false 可更改，true 不可更改
android:numStars=“6” 设置星星数量
android:rat in g=“1” 设置默认评级
android:stepSize=“2” 设置步长

二、示例

class MainActivity : AppCompatActivity() {

    private lateinit var ratingBar: RatingBar

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        initView()
        initClick()
    }

    private fun initView() {
        ratingBar = findViewById(R.id.ratingBar)
    }

    private fun initClick() {
        ratingBar.setOnRatingBarChangeListener { ratingBar, rating, fromUser ->
            Toast.makeText(this, "评级：$rating", Toast.LENGTH_SHORT).show()
        }
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <RatingBar
        android:id="@+id/ratingBar"
        style="?android:attr/ratingBarStyleIndicator"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:isIndicator="false"
        android:numStars="6"
        android:rating="1"
        android:stepSize="2" />

</LinearLayout>