RecyclerView消除底部分割线的方法
最近遇到一个问题，用RecyclerView显示数据，纵向列表显示，添加默认分割线。
问题是：底部也会显示分割线，这很影响美观。
怎么解决这个问题呢？我想了很多办法，毫无头绪。。。
最后，查看默认分割线的类DividerItemDecoration的源码：
publicclassDividerItemDecorationextendsItemDecoration{
privatestaticfinalint[]ATTRS=newint[]{16843284};
publicstaticfinalintHORIZONTAL_LIST=0;
publicstaticfinalintVERTICAL_LIST=1;
privateDrawablemDivider;
privateintmOrientation;
publicDividerItemDecoration(Contextcontext,intorientation){
TypedArraya=context.obtainStyledAttributes(ATTRS);
this.mDivider=a.getDrawable(0);
a.recycle();
this.setOrientation(orientation);
}
publicvoidsetOrientation(intorientation){
if(orientation!=0&&orientation!=1){
thrownewIllegalArgumentException("invalidorientation");
}else{
this.mOrientation=orientation;
}
}
publicvoidonDraw(Canvasc,RecyclerViewparent){
if(this.mOrientation==1){
this.drawVertical(c,parent);
}else{
this.drawHorizontal(c,parent);
}
}
publicvoiddrawVertical(Canvasc,RecyclerViewparent){
intleft=parent.getPaddingLeft();
intright=parent.getWidth()-parent.getPaddingRight();
intchildCount=parent.getChildCount();
for(inti=0;i<childCount;++i){
Viewchild=parent.getChildAt(i);
LayoutParamsparams=(LayoutParams)child.getLayoutParams();
inttop=child.getBottom()+params.bottomMargin;
intbottom=top+this.mDivider.getIntrinsicHeight();
this.mDivider.setBounds(left,top,right,bottom);
this.mDivider.draw(c);
}
}
publicvoiddrawHorizontal(Canvasc,RecyclerViewparent){
inttop=parent.getPaddingTop();
intbottom=parent.getHeight()-parent.getPaddingBottom();
intchildCount=parent.getChildCount();
for(inti=0;i<childCount;++i){
Viewchild=parent.getChildAt(i);
LayoutParamsparams=(LayoutParams)child.getLayoutParams();
intleft=child.getRight()+params.rightMargin;
intright=left+this.mDivider.getIntrinsicHeight();
this.mDivider.setBounds(left,top,right,bottom);
this.mDivider.draw(c);
}
}
publicvoidgetItemOffsets(RectoutRect,intitemPosition,RecyclerViewparent){
if(this.mOrientation==1){
outRect.set(0,0,0,this.mDivider.getIntrinsicHeight());
}else{
outRect.set(0,0,this.mDivider.getIntrinsicWidth(),0);
}
}
}
因为我用到的是垂直列表，用到的是红色字体处的代码：
publicvoiddrawVertical(Canvasc,RecyclerViewparent){
intleft=parent.getPaddingLeft();
intright=parent.getWidth()-parent.getPaddingRight();
intchildCount=parent.getChildCount();
for(inti=0;i<childCount;++i){
Viewchild=parent.getChildAt(i);
LayoutParamsparams=(LayoutParams)child.getLayoutParams();
inttop=child.getBottom()+params.bottomMargin;
intbottom=top+this.mDivider.getIntrinsicHeight();
this.mDivider.setBounds(left,top,right,bottom);
this.mDivider.draw(c);
}
}
从代码中很容易看出只要修改for循环中的内容就可去掉底部的分割线：
publicvoiddrawVertical(Canvasc,RecyclerViewparent){
intleft=parent.getPaddingLeft();
intright=parent.getWidth()-parent.getPaddingRight();
intchildCount=parent.getChildCount();
for(inti=0;i<childCount-1;++i){
Viewchild=parent.getChildAt(i);
LayoutParamsparams=(LayoutParams)child.getLayoutParams();
inttop=child.getBottom()+params.bottomMargin;
intbottom=top+this.mDivider.getIntrinsicHeight();
this.mDivider.setBounds(left,top,right,bottom);
this.mDivider.draw(c);
}
}
因为这个类我们不能直接修改，所以我们可以自定义一个类，修改相应内容，添加分割线的时候，使用自定义类。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。