MyView + rc 滑到最后一条 + 条目监听

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public class Myview extends View {    /**     * 画笔对象的引用     */    private Paint paint;    /**     * 圆环的颜色     */    private int roundColor;    /**     * 圆环进度的颜色     */    private int roundProgressColor;    /**     * 中间进度百分比的字符串的颜色     */    private int textColor;    /**     * 中间进度百分比的字符串的字体     */    private float textSize;    /**     * 圆环的宽度     */    private float roundWidth;    /**     * 最大进度     */    private int max;    /**     * 当前进度     */    private int progress;    /**     * 是否显示中间的进度     */    private boolean textIsDisplayable;    /**     * 进度的风格，实心或者空心     */    private int style;    public static final int STROKE = 0;    public static final int FILL = 1;    public Myview(Context context) {        this(context, null);    }    public Myview(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public Myview(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        paint = new Paint();        TypedArray mTypedArray = context.obtainStyledAttributes(attrs,                R.styleable.roundprosee);        //获取自定义属性和默认值        roundColor = mTypedArray.getColor(R.styleable.roundprosee_roundColor, Color.RED);        roundProgressColor = mTypedArray.getColor(R.styleable.roundprosee_roundProgressColor, Color.GREEN);        textColor = mTypedArray.getColor(R.styleable.roundprosee_textColor, Color.GREEN);        textSize = mTypedArray.getDimension(R.styleable.roundprosee_textSize, 15);        roundWidth = mTypedArray.getDimension(R.styleable.roundprosee_roundWidth, 5);        max = mTypedArray.getInteger(R.styleable.roundprosee_max, 100);        textIsDisplayable = mTypedArray.getBoolean(R.styleable.roundprosee_textIsDisplayable, true);        style = mTypedArray.getInt(R.styleable.roundprosee_style, 0);        mTypedArray.recycle();    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        /**         * 画最外层的大圆环         */        int centre = getWidth() / 2; //获取圆心的x坐标        int radius = (int) (centre - roundWidth / 2); //圆环的半径        paint.setColor(roundColor); //设置圆环的颜色        paint.setStyle(Paint.Style.STROKE); //设置空心        paint.setStrokeWidth(roundWidth); //设置圆环的宽度        paint.setAntiAlias(true);  //消除锯齿        canvas.drawCircle(centre, centre, radius, paint); //画出圆环        Log.e("log", centre + "");        /**         * 画进度百分比         */        paint.setStrokeWidth(0);        paint.setColor(textColor);        paint.setTextSize(textSize);        paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体       int percent = (int) (((float) progress / (float) max) * 100);  //中间的进度百分比，先转换成float在进行除法运算，不然都为0        float textWidth = paint.measureText(percent + "%");   //测量字体宽度，我们需要根据字体的宽度设置在圆环中间        if (textIsDisplayable && percent != 0 && style == STROKE) {            canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize / 2, paint); //画出进度百分比        }        /**         * 画圆弧 ，画圆环的进度         */        //设置进度是实心还是空心        paint.setStrokeWidth(roundWidth); //设置圆环的宽度        paint.setColor(roundProgressColor);  //设置进度的颜色        RectF oval = new RectF(centre - radius, centre - radius, centre                + radius, centre + radius);  //用于定义的圆弧的形状和大小的界限        switch (style) {            case STROKE: {                paint.setStyle(Paint.Style.STROKE);                canvas.drawArc(oval, 0, 360 * progress / max, false, paint);  //根据进度画圆弧                break;            }            case FILL: {                paint.setStyle(Paint.Style.FILL_AND_STROKE);                if (progress != 0)                    canvas.drawArc(oval, 0, 360 * progress / max, true, paint);  //根据进度画圆弧                break;            }        }    }    public synchronized int getMax() {        return max;    }    /**     * 设置进度的最大值     *     * @param max     */    public synchronized void setMax(int max) {        if (max < 0) {            throw new IllegalArgumentException("max not less than 0");        }        this.max = max;    }    /**     * 获取进度.需要同步     *     * @return     */    public synchronized int getProgress() {        return progress;    }    /**     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步     * 刷新界面调用postInvalidate()能在非UI线程刷新     *     * @param progress     */    public synchronized void setProgress(int progress) {        if (progress < -1) {            throw new IllegalArgumentException("progress not less than 0");        }        if (progress > max) {            progress = max;        }        if (progress <= max) {            this.progress = progress;            postInvalidate();        }    }    public int getCricleColor() {        return roundColor;    }    public void setCricleColor(int cricleColor) {        this.roundColor = cricleColor;    }    public int getCricleProgressColor() {        return roundProgressColor;    }    public void setCricleProgressColor(int cricleProgressColor) {        this.roundProgressColor = cricleProgressColor;    }    public int getTextColor() {        return textColor;    }    public void setTextColor(int textColor) {        this.textColor = textColor;    }    public float getTextSize() {        return textSize;    }    public void setTextSize(float textSize) {        this.textSize = textSize;    }    public float getRoundWidth() {        return roundWidth;    }    public void setRoundWidth(float roundWidth) {        this.roundWidth = roundWidth;    }}---------------------------------------    attrs.xml<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="roundprosee">        <attr name="roundColor" format="color"/>        <attr name="roundProgressColor" format="color"/>        <attr name="roundWidth" format="dimension"></attr>        <attr name="textColor" format="color" />        <attr name="textSize" format="dimension" />        <attr name="max" format="integer"></attr>        <attr name="textIsDisplayable" format="boolean"></attr>        <attr name="style">            <enum name="STROKE" value="0"></enum>            <enum name="FILL" value="1"></enum>        </attr>    </declare-styleable></resources>
 --------------------------------recycleView

mMusicRc.setOnScrollListener(new RecyclerView.OnScrollListener() {        @Override    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {        super.onScrollStateChanged(recyclerView, newState);        LinearLayoutManager layoutManager = (LinearLayoutManager) mMusicRc.getLayoutManager();        int itemCount = layoutManager.getItemCount();        int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();        if (newState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {            if (lastVisibleItemPosition == itemCount - 1) {                okNet(21);            }        }    }});

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public interface OnItemListener {    public void onItemClick(MusicBean.SongListBean songListBean);}public void setOnItemListener(OnItemListener onItemListener) {    this.onItemListener = onItemListener;}
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