Android 自定义条形评分

public class StarBar extends View {
    private int starDistance = 0; //星星间距
    private int starCount = 5;  //星星个数
    private int starSize;     //星星高度大小，星星一般正方形，宽度等于高度
    private float starMark = 0.0F;   //评分星星
    private Bitmap starFillBitmap; //亮星星
    private Bitmap starFillMedium; //亮星星
    private Bitmap starFillExcellent; //亮星星
    private Drawable starEmptyDrawable; //暗星星
    private OnStarChangeListener onStarChangeListener;//监听星星变化接口
    private Paint paint;         //绘制星星画笔
    private boolean integerMark = false;
    private int code;
    private int style;

    public StarBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public StarBar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    /**
     * 初始化UI组件
     *
     * @param context
     * @param attrs
     */
    private void init(Context context, AttributeSet attrs){

        setClickable(true);
        TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RatingBar);
        this.starDistance = (int) mTypedArray.getDimension(R.styleable.RatingBar_starDistance, 0);
        this.starSize = (int) mTypedArray.getDimension(R.styleable.RatingBar_starSize, 20);
        this.starCount = mTypedArray.getInteger(R.styleable.RatingBar_starCount, 5);
        this.starEmptyDrawable = mTypedArray.getDrawable(R.styleable.RatingBar_starEmpty);
        this.starFillBitmap =  drawableToBitmap(mTypedArray.getDrawable(R.styleable.RatingBar_starFill));
        this.starFillMedium =  drawableToBitmap(mTypedArray.getDrawable(R.styleable.RatingBar_starMedium));
        this.starFillExcellent =  drawableToBitmap(mTypedArray.getDrawable(R.styleable.RatingBar_starExcellent));
        mTypedArray.recycle();

        paint = new Paint();
        paint.setAntiAlias(true);
        paint.setShader(new BitmapShader(starFillBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
    }

    /**
     * 设置是否需要整数评分
     * @param integerMark
     */
    public void setIntegerMark(boolean integerMark){
        this.integerMark = integerMark;
    }

    /**
     * 设置显示的星星的分数
     *
     * @param mark
     */
    public void setStarMark(float mark){
        if (integerMark) {
            starMark = (int) Math.ceil(mark);
        }else {
            starMark = Math.round(mark * 10) * 1.0f / 10;
        }
        setFile(starMark*10);
        if (this.onStarChangeListener != null) {
            this.onStarChangeListener.onStarChange(starMark*10,this);  //调用监听接口
            invalidate();
        }
    }

    /**
     * 设置显示的星星的分数
     *
     * @param mark
     */
    public void setStarMarkEnabled(float mark){
        if (integerMark) {
            starMark = (int) Math.ceil(mark);
        }else {
            starMark = Math.round(mark * 10) * 1.0f / 10;
        }
        setFile(starMark*10);
        this.setEnabled(false);
        invalidate();
    }

    private void setFile(float starMark) {
        if (0 < starMark && starMark <=6) {
            code = 1;
        } else if (6 < starMark && starMark <=8) {
            code = 2;
        } else if (8 < starMark && starMark <= 10) {
            code = 3;
        }
        if (code == 1) {
            paint.setShader(new BitmapShader(starFillBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        } else if (code == 2) {
            paint.setShader(new BitmapShader(starFillMedium, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        } else if (code == 3) {
            paint.setShader(new BitmapShader(starFillExcellent, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        }
    }

    /**
     * 获取显示星星的数目
     *
     * @return starMark
     */
    public float getStarMark(){
        return starMark;
    }


    /**
     * 定义星星点击的监听接口
     */
    public interface OnStarChangeListener {
        void onStarChange(float mark, StarBar starBar);
    }

    /**
     * 设置监听
     * @param onStarChangeListener
     */
    public void setOnStarChangeListener(OnStarChangeListener onStarChangeListener){
        this.onStarChangeListener = onStarChangeListener;

    }



    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
//        setMeasuredDimension(starSize * starCount + starDistance * (starCount - 1), starSize);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (starFillBitmap == null || starEmptyDrawable == null) {
            return;
        }
        for (int i = 0;i < starCount;i++) {
//            starEmptyDrawable.setBounds((starDistance + starSize) * i, -100, (starDistance + starSize) * i + starSize, starSize);
            starEmptyDrawable.setBounds((starDistance + starSize) * i, 0, (starDistance + starSize) * i + starSize, getMeasuredHeight());
            starEmptyDrawable.draw(canvas);
        }
        if (starMark > 1) {
            canvas.drawRect(0, 0, starSize, starSize, paint);
            if(starMark-(int)(starMark) == 0) {
                for (int i = 1; i < starMark; i++) {
                    canvas.translate(starDistance + starSize, 0);
                    canvas.drawRect(0, 0, starSize, starSize, paint);
                }
            }else {
                for (int i = 1; i < starMark - 1; i++) {
                    canvas.translate(starDistance + starSize, 0);
                    canvas.drawRect(0, 0, starSize, starSize, paint);
                }
                canvas.translate(starDistance + starSize, 0);
                canvas.drawRect(0, 0, starSize * (Math.round((starMark - (int) (starMark))*10)*1.0f/10), starSize, paint);
            }
        }else {
            canvas.drawRect(0, 0, starSize * starMark, starSize, paint);
        }
    }

    public int setStyle(int i){
        style = i;
        return style;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(event != null){
            int x = (int) event.getX();
            if (x < 0) x = 0;
            if (x > getMeasuredWidth()) x = getMeasuredWidth();
            switch(event.getAction()){
                case MotionEvent.ACTION_DOWN: {
                    if (style == 1){
                    }else {
                        setStarMark(x*1.0f / (getMeasuredWidth()*1.0f/starCount));
                    }
                    break;
                }
                case MotionEvent.ACTION_MOVE: {
                    if(style == 1){
                    }else {
                        setStarMark(x*1.0f / (getMeasuredWidth()*1.0f/starCount));
                    }
                    break;
                }
                case MotionEvent.ACTION_UP: {
                    break;
                }
            }
            invalidate();
            return super.onTouchEvent(event);
        }
        return false;
    }

    /**
     * drawable转bitmap
     *
     * @param drawable
     * @return
     */
    private Bitmap drawableToBitmap(Drawable drawable)
    {
        if (drawable == null)return null;
        Bitmap bitmap = Bitmap.createBitmap(starSize, starSize/10, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, starSize, starSize/10);
        drawable.draw(canvas);
        return bitmap;
    }
}

values中 attr.xml中新增

name="RatingBar">
    
    format="dimension" name="starDistance"/>
    
    format="dimension" name="starSize"/>
    
    format="integer" name="starCount"/>
    
    format="reference" name="starEmpty"/>
    
    format="reference" name="starFill"/>
    
    format="reference" name="starMedium"/>
    
    format="reference" name="starExcellent"/>

布局文件中

xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ratingbar="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.test2.MainActivity">

            android:layout_width="200dp"
        android:layout_height="20dp"
        android:layout_centerInParent="true"
        android:layout_marginTop="20dp"
        ratingbar:starCount="1"
        ratingbar:starDistance="0dp"
        ratingbar:starEmpty="@drawable/line_grey3x"
        ratingbar:starExcellent="@drawable/line_green3x"
        ratingbar:starFill="@drawable/line_red3x"
        ratingbar:starMedium="@drawable/line_yellow3x"
        ratingbar:starSize="200dp" />

图片资源