Android MarkTipsView文字标识控件使用方法

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import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;

import androidx.appcompat.widget.AppCompatTextView;

/**
 * 绘制mark标注
 */
public class MarkTipsView extends AppCompatTextView {

    /**
     * 画笔
     */
    private Paint paint;
    /**
     * 宽度
     */
    private int width;
    /**
     * 高度
     */
    private int height;
    /**
     * 标识宽度
     */
    private int markWidth = 12;
    /**
     * 标识高度
     */
    private int markHeight = 12;
    /**
     * 圆角大小
     */
    private float radius = 10;
    /**
     * 填充颜色
     */
    private int solid = Color.parseColor("#F1AA44");

    public MarkTipsView(Context context) {
        super(context);
        initAttributeSet(context, null);
    }

    public MarkTipsView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initAttributeSet(context, attrs);
    }

    public MarkTipsView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initAttributeSet(context, attrs);
    }

    private void initAttributeSet(Context context, AttributeSet attrs) {
        paint = new Paint();
        paint.setDither(true);
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.FILL);
        TypedArray array = context.obtainStyledAttributes(attrs,new int[]{android.R.attr.background});
        solid =  array.getInt(0,solid);
        array.recycle();
    }

    @Override
    public void setBackgroundColor(int color) {
        solid = color;
        invalidate();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        width = getMeasuredWidth();
        height = getMeasuredHeight();
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        setPadding(getPaddingLeft(), getPaddingTop(), getPaddingRight(), getPaddingBottom() + markHeight);
    }


    @Override
    protected void onDraw(Canvas canvas) {
        paint.setColor(solid);
        //矩形
        Path path = new Path();
        RectF rect = new RectF(0, 0, width, height - markHeight);
        path.addRoundRect(rect, radius, radius, Path.Direction.CCW);
        //三角形
        Path onePath = new Path();
        onePath.lineTo(width / 2 - markWidth, rect.height());
        onePath.lineTo(width / 2, height);
        onePath.lineTo(width / 2 + markWidth, rect.height());
        onePath.close();
        path.addPath(onePath);
        //绘制路径
        canvas.drawPath(path, paint);
        super.onDraw(canvas);
        //重绘文字
        setText(getText());
    }

    /**
     * 获取底部标识箭头高度
     * @return
     */
    public int getMarkHeight() {
        return markHeight;
    }

    /**
     * 设置底部标识箭头高度
     * @param markHeight
     */
    public void setMarkHeight(int markHeight) {
        this.markHeight = markHeight;
        invalidate();
    }

    /**
     * 获取底部标识箭头宽度
     * @return
     */
    public int getMarkWidth() {
        return markWidth;
    }

    /**
     * 设置底部标识箭头宽度
     * @param markWidth
     */
    public void setMarkWidth(int markWidth) {
        this.markWidth = markWidth;
        invalidate();
    }

    /**
     * 获取圆角大小
     * @return
     */
    public float getRadius() {
        return radius;
    }

    /**
     * 设置圆角大小
     * @param radius
     */
    public void setRadius(float radius) {
        this.radius = radius;
        invalidate();
    }

}