android自定义view-3d柱状图

public class CustomBar extends View {
    private Context mContext;
    private Paint customPaint,customDrawPain, textPaint, linePaint;
    private int width, height, lineCount = 7;
    private double all;
    private int yTextTemp;//每格数值
    private int yTextIndex = 0;
    private int lineTemp;//每格高度
    private int lineIndex = height;
    private int xSpacing;
    private float index, valuesIndex;
    private int xWidth;

    public CustomBar(Context context) {
        this(context,null);
    }

    public CustomBar(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

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

    private void init(Context context) {
        mContext = context;
        initCustomPain();
        initTextPain();
    }

    private void initTextPain() {
        textPaint = new Paint();//y轴值画笔
        textPaint.setStrokeWidth(2);
        textPaint.setColor(Color.parseColor("#E6E6E6"));
        textPaint.setTextSize(20f);
        linePaint = new Paint();//坐标y轴横线的画笔
        linePaint.setStrokeWidth(2);
        linePaint.setColor(Color.BLACK);
        linePaint.setTextSize(20f);
    }

    private void initCustomPain() {
        customPaint = new Paint();//画笔
        customPaint.setColor(Color.parseColor("#F08F3E"));
        customPaint.setStyle(Paint.Style.FILL);
        customPaint.setTextSize(getResources().getDimension(R.dimen.text_size_h_xxx));
        customDrawPain = new Paint();//3d阴影背景画笔
        customDrawPain.setColor(Color.parseColor("#F8D6C2"));
        customDrawPain.setStyle(Paint.Style.FILL);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        if (widthMode == MeasureSpec.EXACTLY) {
            width = widthSize;
        } else {
            width = 300;
        }
        if (heightMode == MeasureSpec.EXACTLY) {
            height = heightSize;
        } else {
            height = 300;
        }
        setMeasuredDimension(width, height);
        height = height - Utils.dip2px(mContext, 25);//计算出去边距的高度

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        yTextTemp = (int) Math.ceil(all / 5.0);//y轴每格数值
        yTextIndex = 0;//y轴起始值
        lineTemp = height / 7;//y轴每格高度
        lineIndex = height;//y==0的高度
        index = textPaint.measureText("100");
        xWidth = (int) ((width - index) / 9);//柱状图宽度
        xSpacing = (int) ((width - index - xWidth * 2) / 3);
        for (int i = 0; i < lineCount; i++) {//画出坐标
            canvas.drawText((int) yTextIndex + "", 0, lineIndex, linePaint);//绘出刻度值
            canvas.drawLine(index, lineIndex, width, lineIndex, textPaint);//绘出y轴
            lineIndex -= lineTemp;
            yTextIndex += yTextTemp;
        }
        if (valuesIndex <= 10) {//绘制柱状
            drawCustom(canvas, xSpacing, xWidth, valuesIndex, Utils.dip2px(mContext, 4), Utils.dip2px(mContext, 5));
        } else {
            drawCustom(canvas, xSpacing, xWidth, 10, Utils.dip2px(mContext, 4), Utils.dip2px(mContext, 5));
        }
    }

    /**
     * 画柱状
     *
     * @param canvas
     * @param left x坐标
     * @param width 宽度
     * @param value  值
     * @param drawPadding 背景左侧间距
     * @param topPadding  背景top边距
     */
    private void drawCustom(Canvas canvas, int left, int width, float value, float drawPadding, float topPadding) {
        if (value > 0) {
            canvas.drawRect(left, height - value / yTextTemp * lineTemp - topPadding, left + width, height, customDrawPain);
            canvas.drawRect(left + drawPadding, height - value / yTextTemp * lineTemp, left + width + drawPadding, height, customPaint);
            canvas.drawLine(left, height - value / yTextTemp * lineTemp - topPadding, left + drawPadding, height - value / yTextTemp * lineTemp, customPaint);
            Path path = new Path();
            path.moveTo(left + width, height - value / yTextTemp * lineTemp - topPadding);// 此点为多边形的起点
            path.lineTo(left + width + drawPadding, height - value / yTextTemp * lineTemp);
            path.lineTo(left + width, height - value / yTextTemp * lineTemp);
            path.close(); // 使这些点构成封闭的多边形
            canvas.drawPath(path, customDrawPain);
            canvas.drawText(StringUtils.prasePercentage(value / 100), left + width / 3, height - value / yTextTemp * lineTemp - topPadding - Utils.dip2px(mContext, 4), customPaint);
        }
        canvas.drawText("title", left, height + Utils.dip2px(mContext, 20), customPaint);
    }

    public void setDates(float vipValus) {
        this.all = vipValus;
        startAnimationForEvery(0, (float) all, 1200);
    }

    public class LineEvaluator implements TypeEvaluator {

        @Override
        public Object evaluate(float fraction, Object startValue, Object endValue) {
            float startPoint = (float) startValue;
            float endPoint = (float) endValue;
            float y = (startPoint + fraction * (endPoint - startPoint));
            return y;
        }

    }

    private void startAnimationForEvery(float startPoint, float endPoint, long duration) {
        final ValueAnimator anim = ValueAnimator.ofObject(new LineEvaluator(), startPoint, endPoint);
        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                valuesIndex = (float) animation.getAnimatedValue();
                invalidate();
            }
        });
        anim.addListener(new CustomAnimator() {
            @Override
            public void onAnimationEnd(Animator animation) {
                anim.cancel();
            }
        });
        anim.setDuration(duration);
        anim.start();
    }
 }