仿即刻APP点赞桃心的效果

<cn.izouxiang.likeview.LikeView
            android:id="@+id/lv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:number="99"
            />

//点赞view的设置
holder.like.setActivated(entity.isLike);
holder.like.setNumber(entity.likeNum);
holder.like.setCallback(new LikeView.SimpleCallback() {
    @Override
    public void activate(LikeView view) {
        Snackbar.make(view, "你觉得" + entity.name + "很赞!", Snackbar.LENGTH_SHORT).show();
    }

    @Override
    public void deactivate(LikeView view) {
        Snackbar.make(view, "你取消了对" + entity.name + "的赞!", Snackbar.LENGTH_SHORT).show();
    }
});
//评论view的设置
holder.comment.setNumber(entity.commentNum);
//设置图形适配器
holder.comment.setGraphAdapter(CommentPathAdapter.getInstance());
holder.comment.setCallback(new LikeView.SimpleCallback(){
    @Override
    public boolean onClick(LikeView view) {
        Snackbar.make(view, "你点击" + entity.name + "的评论按钮", Snackbar.LENGTH_SHORT).show();
        //返回true代表拦截此次点击,不使用默认的点击事件
        return true;
    }
});

public class CommentPathAdapter implements LikeView.GraphAdapter {
    private static CommentPathAdapter instance;
    private static final float xOffsetScale = 0.06f;
    private static final float yOffsetScale = 0.2f;
	//可用单例模式
    public static CommentPathAdapter getInstance() {
        synchronized (CommentPathAdapter.class) {
            if (null == instance) {
                instance = new CommentPathAdapter();
            }
        }
        return instance;
    }
	//这里绘制你想要的图形
    @Override
    public Path getGraphPath(LikeView view, int length) {
        Path path = new Path();
        int dx = (int) (length * xOffsetScale);
        int dy = (int) (length * yOffsetScale);
        int w = (int) (length * (1 - xOffsetScale * 2));
        int h = (int) (length * (1 - yOffsetScale * 2));
        path.moveTo(dx, dy);
        path.lineTo(dx + w, dy);
        path.lineTo(dx + w, dy + h);
        path.lineTo(dx + (w * 0.35f), dy + h);
        path.lineTo(dx + (w * 0.1f), dy + (h * 1.4f));
        path.lineTo(dx + (w * 0.1f), dy + h);
        path.lineTo(dx, dy + h);
        path.lineTo(dx, dy);
        return path;
    }
}

<resources>
    <declare-styleable name="LikeView">
        <!--当前数值,默认0-->
        <attr name="number" format="integer"/>
        <!--数字颜色,默认#888888-->
        <attr name="textColor" format="color"/>
        <!--图形外边颜色,默认#888888-->
        <attr name="graphColor" format="color"/>
        <!--当前激活时图形颜色,默认#ca5f5f-->
        <attr name="animateColor" format="color"/>
        <!--字体大小,决定控件高度以及图形大小,默认14sp-->
        <attr name="textSize" format="dimension"/>
        <!--动画时间,默认300-->
        <attr name="animateDuration" format="integer"/>
        <!--图形与数字间的距离,默认3dp-->
        <attr name="distance" format="dimension"/>
        <!--图形与数字高度的比例,默认1.3-->
        <attr name="graphTextHeightRatio" format="float"/>
        <!--图形外边绘制宽度,默认3dp-->
        <attr name="graphStrokeWidth" format="dimension"/>
        <!--数字绘制宽度,默认2dp-->
        <attr name="textStrokeWidth" format="dimension"/>
        <!--是否激活,默认false-->
        <attr name="isActivated" format="boolean"/>
        <!--是否自动测量数字修改后的宽度改变,防止更改状态时控件宽度改变,默认开启-->
        <attr name="autoMeasureMaxWidth" format="boolean"/>
        <!--是否不允许取消点赞,默认false-->
        <attr name="notAllowedCancel" format="boolean"/>
        <!--对齐方式,前三种默认垂直居中-->
        <attr name="gravity" format="enum">
            <!--居中-->
            <enum name="center" value="1"/>
            <!--左对齐-->
            <enum name="left" value="2"/>
            <!--右对齐-->
            <enum name="right" value="3"/>
            <!--开始点-->
            <enum name="start" value="4"/>
        </attr>
    </declare-styleable>
</resources>

/**
* 事件监听接口
*/
public interface Callback {
/**
    * 点击事件监听
    *
    * @param view 当前View
    * @return 返回true则代表不使用默认的点击事件
    */
    boolean onClick(LikeView view);

    /**
        * 变为激活状态
        *
        * @param view 当前View
        */
    void activate(LikeView view);

    /**
        * 变为不激活状态
        *
        * @param view 当前View
        */
    void deactivate(LikeView view);
}

/**
* 获取图形Path接口
*/
public interface GraphAdapter {
    /**
        * 获取图形的Path
        *
        * @param view   当前View
        * @param length 可绘制图形区域正方形的边长
        * @return 带有图形的Path
        */
    Path getGraphPath(LikeView view, int length);
}