RecyclerView分割线

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闲来无事，把自己弄的一个RecyclerView分割线，整理一下，贴上来，当做笔记，方便自己以后查看。

使用方法：

一、添加默认分割线：默认纵向布局、高度为2、灰色，

rv.addItemDecoration(new RecyclerDecoration(this));

二、添加自定义分割线：可设置布局方向，

rv.addItemDecoration(newRecyclerDecoration(this,LinearLayoutManager.VERTICAL));

三、添加自定义分割线：可设置、布局方向、颜色，

rv.addItemDecoration(new RecyclerDecoration(this,LinearLayoutManager.VERTICAL, getResources().getColor(R.color.colorPrimaryDark)));

rv.addItemDecoration(newRecyclerDecoration(this,LinearLayoutManager.VERTICAL,Color.RED));

四、添加自定义分割线：可设置布局方向、颜色、高度或者宽度，

rv.addItemDecoration(new RecyclerDecoration(this,LinearLayoutManager.VERTICAL, Color.RED,2));

代码：

public class RecyclerDecoration extends RecyclerView.ItemDecoration {    /**    * RecyclerView的布局方向，默认先赋值为纵向布局    */    private int mOrientation = LinearLayoutManager.VERTICAL;    /**     * item之间分割线的size默认为 2     */    private int mSize = 2;    /**     * 绘制item分割线的画笔，和设置其属性     * 来绘制个性分割线     */    private Paint mPaint;    private Context mContext;    /**     * 默认颜色为灰色     */    private int mColor = 0xff969696;    /**     * @param context     context     * 默认为纵向布局、灰色、分割线为  2     */    public RecyclerDecoration(Context context) {        this.mContext = context;        setAttry();    }    /**     * @param context     context     * @param orientation 布局方向     */    public RecyclerDecoration(Context context,int orientation){        this.mContext = context;        this.mOrientation = orientation;        setAttry();    }    /**     * @param context     context     * @param orientation 布局方向     * @param color       颜色     */    public RecyclerDecoration(Context context, int orientation, int color) {        this.mContext = context;        this.mOrientation = orientation;        this.mColor = color;        setAttry();    }    /**     * @param context     context     * @param orientation 布局方向     * @param color       颜色     * @param mItemSize   item之间分割线的size     */    public RecyclerDecoration(Context context, int orientation, int color, int mItemSize) {        this.mContext = context;        this.mOrientation = orientation;        this.mSize = mItemSize;        this.mColor = color;        setAttry();    }    /**     * 设置属性     */    private void setAttry(){        if (mOrientation != LinearLayoutManager.VERTICAL && mOrientation != LinearLayoutManager.HORIZONTAL) {            throw new IllegalArgumentException("LinearLayoutManager error");        }        mSize = (int) TypedValue.applyDimension(mSize, TypedValue.COMPLEX_UNIT_DIP, mContext.getResources().getDisplayMetrics());        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);        mPaint.setColor(mColor);         /*设置填充*/        mPaint.setStyle(Paint.Style.FILL);    }    @Override    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {        if (mOrientation == LinearLayoutManager.VERTICAL) {            drawVertical(c, parent);        } else {            drawHorizontal(c, parent);        }    }    /**     * 绘制纵向 item 分割线     * @param canvas canvas     * @param parent parent     */    private void drawVertical(Canvas canvas, RecyclerView parent) {        final int left = parent.getPaddingLeft();        final int right = parent.getMeasuredWidth() - parent.getPaddingRight();        final int childSize = parent.getChildCount();        for (int i = 0; i < childSize; i++) {            final View child = parent.getChildAt(i);            RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();            final int top = child.getBottom() + layoutParams.bottomMargin;            final int bottom = top + mSize;            canvas.drawRect(left, top, right, bottom, mPaint);        }    }    /**     * 绘制横向 item 分割线     * @param canvas canvas     * @param parent parent     */    private void drawHorizontal(Canvas canvas, RecyclerView parent) {        final int top = parent.getPaddingTop();        final int bottom = parent.getMeasuredHeight() - parent.getPaddingBottom();        final int childSize = parent.getChildCount();        for (int i = 0; i < childSize; i++) {            final View child = parent.getChildAt(i);            RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();            final int left = child.getRight() + layoutParams.rightMargin;            final int right = left + mSize;            canvas.drawRect(left, top, right, bottom, mPaint);        }    }    /**     * 设置item分割线的size     * @param outRect outRect     * @param view    view     * @param parent  parent     * @param state   state     */    @Override    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {        if (mOrientation == LinearLayoutManager.VERTICAL) {            outRect.set(0, 0, 0, mSize);        } else {            outRect.set(0, 0, mSize, 0);        }    }}

参考：http://blog.csdn.net/qq_26413249/article/details/52035149

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