Android实现简单实用的垂直进度条

public class verticalprogress extends view {

    //进度条圆角
    private int mradius;
    //进度条是否有边框
    private boolean mborderenable;
    //是否有渐变色
    private boolean mgradientenable;
    //渐变色
    private int mstartresid;
    private int mendresid;
    //边框的颜色
    private int mbordercolorresid;
    //进度条背景填充色
    private int mprogressbgcolorid;
    //边框宽度
    private int mborderwidth;

    private int mprogress = 10;
    private int max = 100;

    private int mwidth;
    private int mheight;

    private rectf mrectf;
    private paint mpaint;

    public verticalprogress(context context) {
        super(context);
        init(context, null);
    }

    public verticalprogress(context context, @nullable attributeset attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    @override
    protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
        super.onmeasure(widthmeasurespec, heightmeasurespec);
        mwidth = getmeasuredwidth() - 1;// 宽度值
        mheight = getmeasuredheight() - 1;// 高度值
    }

    private void init(context context, attributeset attrs) {
        typedarray typedarray = null;
        if (attrs != null) {
            typedarray = context.obtainstyledattributes(attrs, r.styleable.verticalprogress);

            mradius = typedarray.getint(r.styleable.verticalprogress_progress_radius, 0);
            mborderenable = typedarray.getboolean(r.styleable.verticalprogress_progress_border_enable, false);
            mgradientenable = typedarray.getboolean(r.styleable.verticalprogress_progress_gradient_enable, true);
            mstartresid = typedarray.getresourceid(r.styleable.verticalprogress_progress_start_color, r.color.colorprimary);
            mprogressbgcolorid = typedarray.getresourceid(r.styleable.verticalprogress_progress_solid_color, r.color.white);
            mendresid = typedarray.getresourceid(r.styleable.verticalprogress_progress_end_color, r.color.color_4ea6fd);
            mbordercolorresid = typedarray.getresourceid(r.styleable.verticalprogress_progress_border_color, r.color.color_4ea6fd);
            mborderwidth = typedarray.getresourceid(r.styleable.verticalprogress_progress_border_width, 10);
        }

        if (typedarray != null) {
            typedarray.recycle();
        }

        mrectf = new rectf();
        mpaint = new paint();
        mpaint.setantialias(true);
    }

    @suppresslint("drawallocation")
    @override
    protected void ondraw(canvas canvas) {
        super.ondraw(canvas);
        if (mradius == 0) {
            //弧度为高度的一半
            mradius = mwidth / 2;
        }

        if (mborderenable) {
            //第一层矩形(描边层)
            mrectf.set(0, 0, mwidth, mheight);
            //第一层矩形颜色(进度条描边的颜色)
            mpaint.setcolor(getresources().getcolor(mbordercolorresid));
            //画第一层圆角矩形
            canvas.drawroundrect(mrectf, mradius, mradius, mpaint);
            //第二层矩形颜色(背景层颜色)
            mpaint.setcolor(getresources().getcolor(mprogressbgcolorid));
            //第二层矩形(背景层)
            mrectf.set(mborderwidth, mborderwidth, mwidth - mborderwidth, mheight - mborderwidth);
            //画背景层圆角矩形(盖在描边层之上)
            canvas.drawroundrect(mrectf, mradius, mradius, mpaint);
        }

        if (mprogress == 0)//进度为 0不画进度
            return;

        float section = mprogress / max;

        //进度层底层
        mrectf.set(+8, mheight - mprogress / 100f * mheight + 10, mwidth - 8, mheight - 8);

        if (mgradientenable) {
            //渐变器
            lineargradient shader = new lineargradient(0, 0, mwidth * section, mheight,
                    getresources().getcolor(mstartresid), getresources().getcolor(mendresid), shader.tilemode.clamp);

            //第三层矩形颜色(进度渐变色)
            mpaint.setshader(shader);
        }

        //画第三层(进度层)圆角矩形(盖在背景层之上)
        canvas.drawroundrect(mrectf, mradius, mradius, mpaint);

        //清除之前传递的shader
        mpaint.setshader(null);
    }

    public void setprogress(int currentcount) {

        this.mprogress = currentcount > max ? max : currentcount;

        postinvalidate();

    }
}

<declare-styleable name="verticalprogress">
        <attr name="progress_radius" format="dimension" />
        <attr name="progress_border_width" format="dimension" />
        <attr name="progress_gradient_enable" format="boolean" />
        <attr name="progress_border_enable" format="boolean" />
        <attr name="progress_start_color" format="color" />
        <attr name="progress_solid_color" format="color" />
        <attr name="progress_end_color" format="color" />
        <attr name="progress_border_color" format="boolean" />
</declare-styleable>

<com.widget.verticalprogress
            android:id="@+id/vp_progress"
            android:layout_width="20dp"
            android:layout_height="match_parent"
            app:progress_border_enable="true"
            app:progress_solid_color="@color/white"
            android:layout_centerinparent="true" />