android怎么自定义view绘制表格

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import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.graphics.RectF;import android.graphics.Typeface;import android.text.Layout;import android.text.StaticLayout;import android.text.TextPaint;import android.text.TextUtils;import android.util.AttributeSet;import android.view.View;import androidx.annotation.Nullable;import com.robot.common.entity.ScenicDetailInfo;import com.robot.common.utils.PixelUtil;/** * 景区详情门票信息表格 * * @author ly * date 2019/8/12 10:24 */public class TicketInfoView extends View {    private Paint pLine, pText;    //表格宽高    private int w, h;    //每一行的高度    private int rowH;    //表格线的宽度    private float tableLineW;    //竖线x坐标    private float vLine1x, vLine2x, vLine3x, vLine4x;    //横线y坐标    private float hLine1y, hLine2y;    //每一列文字的x坐标（单列内居中）    private float textX1, textX2, textX3, textX4, textX5, textXEnd;    private static final String text1 = "市场价";    private static final String text2 = "单人出行";    private static final String text3 = "多人出行";    private static final String text4 = "持卡者";    private static final String text5 = "同行者";    private static final String text6 = "出行总人数";    private ScenicDetailInfo.TicketInfo ticketInfo;    private int tableLineColor = Color.parseColor("#FFB6B4C8");    private int textColorBlack = Color.parseColor("#FF232627");    private int textColorGray = Color.parseColor("#FF65657e");    private int textColorRed = Color.parseColor("#FFfa496a");    private int blackTextSize = PixelUtil.sp2px(14);    private int grayTextSize = PixelUtil.sp2px(12);    private int redTextSize = PixelUtil.sp2px(13);    //表格上半部分颜色    private int tableBgColorTop = Color.parseColor("#FFF6F5FF");    //表格下半部分颜色    private int tableBgColorBottom = Color.parseColor("#FFE9EAFF");    //表格高亮部分颜色    private int tableBgColorHighLight = Color.parseColor("#FF6066DD");    //三个有颜色的矩形区域    private RectF topRect, bottomRect, highLightRect;    private static final int radius = PixelUtil.dp2px(10);    //圆角矩形的Path    private Path pathRoundRect;    //顶部矩形的四个圆角    private static final float[] radiusTop = {radius, radius, radius, radius, 0f, 0f, 0f, 0f};    //底部矩形的四个圆角    private static final float[] radiusBottom = {0, 0, 0, 0, radius, radius, radius, radius};    private static final float[] radiusAll = {radius, radius, radius, radius, radius, radius, radius, radius};    //门票信息文字的高度    private int ticketInfoTextH;    //门票信息内间距    private final int ticketInfoTextPadding = PixelUtil.dp2px(5);    private StaticLayout ticketTextStaticLayout;    private TextPaint ticketTextPaint;    private int ticketTextH;    public TicketInfoView(Context context) {        this(context, null);    }    public TicketInfoView(Context context, @Nullable AttributeSet attrs) {        this(context, attrs, 0);    }    public TicketInfoView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        tableLineW = PixelUtil.dp2px(1.0f);        pLine = new Paint();        pLine.setAntiAlias(true);        pLine.setStrokeWidth(tableLineW);        pText = new Paint();        pText.setAntiAlias(true);        pText.setTextAlign(Paint.Align.CENTER);        pathRoundRect = new Path();        topRect = new RectF();        bottomRect = new RectF();        highLightRect = new RectF();    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        w = MeasureSpec.getSize(widthMeasureSpec);        rowH = (int) (w * 0.134f);        computeH();        setMeasuredDimension(w, h);    }    @Override    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);        vLine1x = 1 / 5f * w;        vLine2x = 2 / 5f * w;        vLine3x = 3 / 5f * w;        vLine4x = 4 / 5f * w;        hLine1y = rowH;        hLine2y = rowH * 2;        textX1 = vLine1x / 2;        textX2 = vLine1x + (vLine2x - vLine1x) / 2;        textX3 = vLine2x + (vLine3x - vLine2x) / 2;        textX4 = vLine3x + (vLine4x - vLine3x) / 2;        textX5 = vLine4x + (w - vLine4x) / 2;        textXEnd = w / 2f;        topRect.right = w;        topRect.bottom = rowH * 3;        bottomRect.top = topRect.bottom;        bottomRect.right = w;        bottomRect.bottom = topRect.bottom + ticketTextH;        highLightRect.left = vLine2x;        highLightRect.top = hLine1y;        highLightRect.right = vLine3x;        highLightRect.bottom = topRect.bottom;    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        pathRoundRect.reset();        pLine.setStyle(Paint.Style.FILL);        pLine.setColor(tableBgColorTop);        if (hasTicketInfo()) {            //画顶部矩形            pathRoundRect.addRoundRect(topRect, radiusTop, Path.Direction.CW);            canvas.drawPath(pathRoundRect, pLine);            //画底部矩形            pathRoundRect.reset();            pathRoundRect.addRoundRect(bottomRect, radiusBottom, Path.Direction.CW);            pLine.setColor(tableBgColorBottom);        } else {//无门票说明则只画上部分表格            pathRoundRect.addRoundRect(topRect, radiusAll, Path.Direction.CW);        }        canvas.drawPath(pathRoundRect, pLine);        //画高亮部分矩形        pLine.setColor(tableBgColorHighLight);        canvas.drawRect(highLightRect, pLine);        //四根竖线        pLine.setColor(tableLineColor);        pLine.setStrokeWidth(tableLineW / 2);        canvas.drawLine(vLine1x, 0, vLine1x, topRect.bottom, pLine);        canvas.drawLine(vLine2x, 0, vLine2x, topRect.bottom, pLine);        canvas.drawLine(vLine3x, hLine1y, vLine3x, topRect.bottom, pLine);        canvas.drawLine(vLine4x, hLine1y, vLine4x, topRect.bottom, pLine);        //两根横线        canvas.drawLine(vLine1x, hLine1y, w, hLine1y, pLine);        canvas.drawLine(0, hLine2y, w, hLine2y, pLine);        pText.setColor(textColorBlack);        pText.setTextSize(blackTextSize);        pText.setTypeface(getTypeface());        //计算baseline        float baseline = hLine2y / 2 + getTextDis();        //市场价 黑色大字        canvas.drawText(text1, textX1, baseline, pText);        //第一行黑色大字        baseline = hLine1y / 2 + getTextDis();        canvas.drawText(text2, textX2, baseline, pText);        canvas.drawText(text3, vLine2x + (w - vLine2x) / 2, baseline, pText);        //第二行小字        baseline = hLine1y + (hLine2y - hLine1y) / 2 + getTextDis();        pText.setTextSize(grayTextSize);        canvas.drawText(text4, textX2, baseline, pText);        canvas.drawText(text5, textX4, baseline, pText);        canvas.drawText(text6, textX5, baseline, pText);        pText.setColor(Color.WHITE);        canvas.drawText(text4, textX3, baseline, pText);        //第三行 画价格、随行人数        if (ticketInfo != null) {            pText.setTextSize(redTextSize);            pText.setColor(textColorBlack);            baseline = hLine2y + (topRect.bottom - hLine2y) / 2 + getTextDis();            //市场价            canvas.drawText(limitTextLength(ticketInfo.price), textX1, baseline, pText);            //出行总人数            canvas.drawText(limitTextLength(ticketInfo.discounts_num), textX5, baseline, pText);            //持卡者、同行者价格            pText.setColor(Color.WHITE);            canvas.drawText(limitTextLength(ticketInfo.discounts_member), textX3, baseline, pText);            pText.setColor(textColorRed);            canvas.drawText(limitTextLength(ticketInfo.single), textX2, baseline, pText);            canvas.drawText(limitTextLength(ticketInfo.discounts), textX4, baseline, pText);            //底部门票说明            if (hasTicketInfo() && ticketTextStaticLayout != null) {                canvas.save();                //设定文字开始绘制的坐标，该坐标对应文字的left,top                canvas.translate(ticketInfoTextPadding, topRect.bottom + ticketInfoTextPadding + (bottomRect.bottom - bottomRect.top - ticketInfoTextH - 2 * ticketInfoTextPadding) / 2);                ticketTextStaticLayout.draw(canvas);                canvas.restore();            }        }    }    private void computeH() {        if (hasTicketInfo() && w > 2 * ticketInfoTextPadding) {            if (ticketTextPaint == null) {                ticketTextPaint = new TextPaint();                ticketTextPaint.setColor(textColorGray);                ticketTextPaint.setTextSize(redTextSize);                ticketTextPaint.setAntiAlias(true);            }            //此处每次都创建新对象来获取ticket_info最新值            ticketTextStaticLayout = new StaticLayout(ticketInfo.ticket_info, ticketTextPaint, w - 2 * ticketInfoTextPadding, Layout.Alignment.ALIGN_CENTER, 1.1F, 1.1F, true);            ticketInfoTextH = ticketTextStaticLayout.getHeight();            h = (int) (0.4 * w) + ticketTextH;        } else {            h = (int) (0.4 * w);        }        ticketTextH = Math.max((ticketInfoTextH + ticketInfoTextPadding * 2), rowH);        h = hasTicketInfo() ? (int) (0.4 * w) + ticketTextH : (int) (0.4 * w);    }    private Typeface getTypeface() {        Typeface roboto = Typeface.create("sans-serif-medium", Typeface.NORMAL);        if (roboto == null || roboto.getStyle() == Typeface.NORMAL)            roboto = Typeface.DEFAULT_BOLD;        return roboto;    }    /**     * 设置pText的字体大小等属性时，更新文字居中距离     *     * @return 文字居中的y坐标     */    private float getTextDis() {        Paint.FontMetrics fontMetrics = pText.getFontMetrics();        return (fontMetrics.bottom - fontMetrics.top) / 2 - fontMetrics.bottom;    }    /**    * ticketInfo为后台返回的数据模型，此处不再贴出    */    public void setTicketInfo(ScenicDetailInfo.TicketInfo ticketInfo) {        this.ticketInfo = ticketInfo;        if (ticketInfo != null) {            computeH();            //重新layout，确定view的绘制区域            requestLayout();        } else {            invalidate();        }    }    private String limitTextLength(String src) {        if (!TextUtils.isEmpty(src) && src.length() > 5)            src = src.substring(0, 5) + "...";        return src;    }    private boolean hasTicketInfo() {        return ticketInfo != null && !TextUtils.isEmpty(ticketInfo.ticket_info);    }}

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