两种方法

自定义view

控件风格

小程序

自定义view

class MyView : View{    var Width1 = 0    var paint:Paint= Paint()//    var subrectwidth:Float = 0.0f//    var subrectheight:Float = 0.0f    var score = 4.0f    var bitmap1:Bitmap? = null    var bitmap2:Bitmap? = null    var bitmap3:Bitmap? = null    constructor(context: Context):super(context)    constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)    //初始化三张图片    init {        bitmap1 = BitmapFactory.decodeResource(context.resources, R.mipmap.evaluate_default_face)         bitmap2 = BitmapFactory.decodeResource(context.resources, R.mipmap.evaluate_yellow_face)         bitmap3 = BitmapFactory.decodeResource(context.resources, R.mipmap.evaluate_yellow_half)    }    override fun onDraw(canvas: Canvas?) {        super.onDraw(canvas)//        val Height = measuredHeight        //界面宽平分5份        Width1 = measuredWidth/5        val measuredHeight = measuredHeight //界面高        if (bitmap1!!.width!=Width1){            bitmap1!!.scale(Width1,measuredHeight,true)        }        if (bitmap2!!.width!=Width1){            bitmap2!!.scale(Width1,measuredHeight,true)        }        if (bitmap3!!.width!=Width1){            bitmap3!!.scale(Width1,measuredHeight,true)        }        for (i in 0..4){            canvas!!.drawBitmap(bitmap1!!,Width1*i.toFloat(),50f,paint)        }        val a = score.toInt()        val fl = score - a        Log.e("ddd",fl.toString())        if (fl<0.5) {            for (i in 0..( a-1)) {                canvas!!.drawBitmap(bitmap2!!, Width1 * i.toFloat(), 50f, paint)            }            canvas!!.drawBitmap(bitmap3!!, Width1 * a.toFloat(), 50f, paint)        }else{            for (i in 0..a) {                canvas!!.drawBitmap(bitmap2!!, Width1 * i.toFloat(), 50f, paint)            }        }    }    override fun onTouchEvent(event: MotionEvent): Boolean {        val action = event.action        Log.e("aaa",event.x.toString())        if (event.action== MotionEvent.ACTION_DOWN){           var x = event.x           score =x/Width1+0.2f           Log.e("bbb",score.toString())           invalidate()       }        return true    }}

控件风格

style.xml文件

<resources>    <!-- Base application theme. -->    <style name="myratingbar" parent="Widget.AppCompat.RatingBar">        <!-- Customize your theme here. -->        <item name="android:progressDrawable">@drawable/back</item>        <item name="android:minHeight">70dp</item>        <item name="android:stepSize">0.5</item>    </style></resources>

在 drawable内
要选用系统自带id

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">    <!--    未选-->    <item        android:id="@android:id/background"        android:drawable="@drawable/evaluate_default_face"/>    <!--    半选-->    <item        android:id="@android:id/secondaryProgress"        android:drawable="@drawable/evaluate_yellow_half"/><!--    全选-->    <item        android:id="@android:id/progress"        android:drawable="@drawable/evaluate_yellow_face"/></layer-list>

最后在布局中加入style属性就好了,

 <RatingBar        android:id="@+id/ratingbar"        android:numStars="5"        android:stepSize="0.5"        style="@style/myratingbar"        android:rating="1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        />